ASTM F1506-22

Standard Performance Specification for Flame Resistant and Electric Arc Rated Protective Clothing Worn by Workers Exposed to Flames and Electric Arcs

ABSTRACT
This performance specification covers the design characteristics and associated test methods that relate specifically to the flame resistance of textile materials used in the fabrication of basic protection level occupational apparel worn by electrical workers who are exposed to momentary electric arc and related thermal hazards such as exposure to open flame and radiant heat. When evaluated in accordance with the test procedures enlisted herein, knit fabrics and woven fabrics of different fabric weights shall conform to individually specified values of the following properties: colorfastness such as laundering shade change, dry-cleaning shade change, and dimensional change; initial flammability characteristics and flammability characteristics after 25 washes/dry-cleaning such as char length and afterflame time; and arc test rating. Knit fabrics shall additionally be tested and adhere accordingly to bursting strength characteristics. Conversely, woven fabrics shall also be tested and adhere accordingly to breaking load, tear resistance, and seam slippage characteristics.
SCOPE
1.1 This performance specification identifies minimum performance requirements to determine the (a) arc rating of fabrics, (b) flame resistance of fabrics and subassemblies, (c) mechanical durability of the fabrics and subassemblies, (d) the minimum garment construction and performance requirements, and (e) the garment labeling requirements for the completed protective clothing worn by workers exposed to flames and electric arcs.  
1.1.1 The minimum requirements for garment labeling are intended to provide end users with adequate information to select garments with the appropriate arc rating.  
1.1.2 End users are required to perform an assessment to determine the level of hazard and the required arc rating of the protective clothing for their individual hazards.
1.1.2.1 The end user risk assessments are outside the scope of this standard.  
1.2 This performance specification does not address coated or laminated protective clothing commonly used for rainwear applications in an arc hazard environment. Performance requirements related to this category of protective clothing are detailed in Specification F1891.  
1.3 This performance specification does not address hand protection. Performance and test requirements related to hand protection are detailed in OSHA 1910.138, Specification D120, and Test Method F2675/F2675M.  
1.4 The care and maintenance requirements for laundering electric arc flash protective clothing are outside the scope of this standard. Refer to Guides F1449 or F2757 related to industrial or home laundering.  
1.5 This standard should be used to evaluate and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions. It should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions.  
1.5.1 The results of this evaluation may be used as elements of a fire-risk assessment that takes into account all of the factors that are pertinent to an assessment of the fire hazard of a particular end use.  
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.7 The following precautionary caveat pertains only to the test methods portion, Section 7, of this performance specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and...

General Information

• Status: Published
• Publication Date: 28-Feb-2022
• ICS: 13.260 - Protection against electric shock. Live working
• Technical Committee: F18 - Electrical Protective Equipment for Workers
• Drafting Committee: F18.65 - Wearing Apparel

Relations

• Refers: ASTM F1959/F1959M-24a - Standard Test Method for Determining the Arc Rating of Materials for Clothing
• Effective Date: 01-Mar-2024
• Refers: ASTM D2261-13(2024) - Standard Test Method for Tearing Strength of Fabrics by the Tongue (Single Rip) Procedure (Constant-Rate-of-Extension Tensile Testing Machine)
• Effective Date: 01-Jan-2024
• Refers: ASTM F1959/F1959M-24 - Standard Test Method for Determining the Arc Rating of Materials for Clothing
• Effective Date: 01-Jan-2024
• Refers: ASTM F1959/F1959M-23a - Standard Test Method for Determining the Arc Rating of Materials for Clothing
• Effective Date: 01-Dec-2023
• Refers: ASTM F1959/F1959M-23 - Standard Test Method for Determining the Arc Rating of Materials for Clothing
• Effective Date: 01-Oct-2023
• Refers: ASTM F2757-20 - Standard Guide for Home Laundering Care and Maintenance of Flame Resistant or Arc Rated Clothing
• Effective Date: 01-Apr-2020
• Refers: ASTM F1449-20 - Standard Guide for Industrial Laundering Care and Maintenance of Flame Resistant or Arc Rated Clothing
• Effective Date: 01-Apr-2020
• Refers: ASTM D1776/D1776M-20 - Standard Practice for Conditioning and Testing Textiles
• Effective Date: 01-Feb-2020
• Refers: ASTM F1891-19 - Standard Specification for Arc and Flame Resistant Rainwear
• Effective Date: 01-Jan-2019
• Refers: ASTM F2178-17b - Standard Test Method for Determining the Arc Rating and Standard Specification for Eye or Face Protective Products
• Effective Date: 01-Oct-2017
• Refers: ASTM F2178-17a - Standard Test Method for Determining the Arc Rating and Standard Specification for Eye or Face Protective Products
• Effective Date: 01-Sep-2017
• Refers: ASTM D2261-13(2017)e1 - Standard Test Method for Tearing Strength of Fabrics by the Tongue (Single Rip) Procedure (Constant-Rate-of-Extension Tensile Testing Machine)
• Effective Date: 15-Jul-2017
• Refers: ASTM D2261-13(2017) - Standard Test Method for Tearing Strength of Fabrics by the Tongue (Single Rip) Procedure (Constant-Rate-of-Extension Tensile Testing Machine)
• Effective Date: 15-Jul-2017
• Refers: ASTM D3776/D3776M-09a(2017) - Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
• Effective Date: 15-Jul-2017
• Refers: ASTM F2178-17 - Standard Test Method for Determining the Arc Rating and Standard Specification for Eye or Face Protective Products
• Effective Date: 01-Jul-2017

Overview

ASTM F1506-22 is the internationally recognized standard developed by ASTM International for defining the minimum performance requirements, test methods, and labeling criteria for flame resistant (FR) and electric arc rated protective clothing. This specification is designed specifically for work apparel worn by electrical workers and others who are exposed to momentary electric arcs, flames, or related thermal hazards in the workplace. It provides a comprehensive framework for evaluating the safety and durability of textiles, with the intent to reduce the risk of burn injuries and increase overall worker protection.

Key Topics

• Arc Rating: Establishes required testing to determine the arc rating (measured in cal/cm²) of clothing, denoting the fabric’s capacity to resist heat energy from an electric arc.
• Flame Resistance: Specifies flammability test methods and maximum allowable char length and afterflame times both before and after multiple launderings.
• Mechanical Durability: Outlines performance tests for mechanical properties including breaking load, tear resistance, bursting strength (for knits and non-wovens), and dimensional stability.
• Garment Construction: Sets minimum requirements for thread, trims, fasteners, and visibility enhancements in garment assembly to ensure comprehensive protection.
• Labeling Requirements: Mandates standardized labeling that helps end users easily select garments with adequate protection based on arc rating and other critical data.
• Testing and Conformance: Details how fabric samples should be prepared and evaluated using methods such as ASTM D6413 (flammability), ASTM F1959/F1959M (arc rating), and ASTM D5034 (breaking strength), among others.

Applications

The practical value of ASTM F1506-22 lies in its direct application across a range of high-risk working environments that expose employees to potential electrical arc flash and flame incidents. Key applications include:

• Electrical Utilities: Line workers, substation technicians, and engineers working directly with energized equipment.
• Industrial Maintenance: Maintenance professionals and contractors in manufacturing plants, refineries, or power generation facilities.
• Construction: Workers handling live electrical circuits or performing hot work.
• Railroad and Transit Operations: Staff engaged in track work or signal system maintenance with electrical hazards.

By referencing ASTM F1506-22, employers and safety managers can ensure that purchased protective clothing meets rigorous safety standards. The standard also provides end users with clear guidance for selecting apparel with appropriate arc ratings, helping organizations remain compliant with OSHA regulations and other international safety requirements.

Related Standards

ASTM F1506-22 references and is complemented by several other key standards, including:

• ASTM F1959/F1959M: Test Method for Determining the Arc Rating of Materials for Clothing.
• ASTM D6413: Test Method for Flame Resistance of Textiles (Vertical Test).
• NFPA 2112: Standard on Flame-Resistant Clothing for Protection of Industrial Personnel.
• ASTM F1891: Specification for Arc and Flame Resistant Rainwear (for coated or laminated garments).
• OSHA 1910.138: Hand Protection.
• ANSI/ISEA 107: American National Standard for High-Visibility Safety Apparel.
• ISO 20471: High visibility clothing - Test methods and requirements.
• ASTM F1449 and F2757: Guides for industrial and home laundering care and maintenance for flame resistant clothing.

Selecting garments certified to ASTM F1506-22 is a critical step for any organization prioritizing electrical safety, arc flash protection, and compliance with global best practices for personal protective equipment (PPE).

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:F1506 −22
Standard Performance Specification for
Flame Resistant and Electric Arc Rated Protective Clothing
Worn by Workers Exposed to Flames and Electric Arcs
This standard is issued under the fixed designation F1506; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope should not be used to describe or appraise the fire hazard or
fire risk of materials, products, or assemblies under actual fire
1.1 This performance specification identifies minimum per-
conditions.
formance requirements to determine the (a) arc rating of
1.5.1 The results of this evaluation may be used as elements
fabrics, (b) flame resistance of fabrics and subassemblies, (c)
of a fire-risk assessment that takes into account all of the
mechanical durability of the fabrics and subassemblies, (d) the
factors that are pertinent to an assessment of the fire hazard of
minimumgarmentconstructionandperformancerequirements,
a particular end use.
and (e) the garment labeling requirements for the completed
1.6 The values stated in SI units are to be regarded as the
protective clothing worn by workers exposed to flames and
standard. The values given in parentheses are for information
electric arcs.
only.
1.1.1 The minimum requirements for garment labeling are
intended to provide end users with adequate information to
1.7 The following precautionary caveat pertains only to the
select garments with the appropriate arc rating. test methods portion, Section 7, of this performance specifica-
1.1.2 End users are required to perform an assessment to tion: This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
determine the level of hazard and the required arc rating of the
protective clothing for their individual hazards. of the user of this standard to establish appropriate safety,
health, and environmental practices and determine the appli-
1.1.2.1 The end user risk assessments are outside the scope
cability of regulatory limitations prior to use.
of this standard.
1.8 This international standard was developed in accor-
1.2 This performance specification does not address coated
dance with internationally recognized principles on standard-
or laminated protective clothing commonly used for rainwear
ization established in the Decision on Principles for the
applications in an arc hazard environment. Performance re-
Development of International Standards, Guides and Recom-
quirements related to this category of protective clothing are
mendations issued by the World Trade Organization Technical
detailed in Specification F1891.
Barriers to Trade (TBT) Committee.
1.3 This performance specification does not address hand
2. Referenced Documents
protection. Performance and test requirements related to hand
protectionaredetailedinOSHA1910.138,SpecificationD120,
2.1 ASTM Standards:
and Test Method F2675/F2675M.
D120 Specification for Rubber Insulating Gloves
D123 Terminology Relating to Textiles
1.4 The care and maintenance requirements for laundering
D1424 Test Method for Tearing Strength of Fabrics by
electric arc flash protective clothing are outside the scope of
Falling-Pendulum (Elmendorf-Type) Apparatus
this standard. Refer to Guides F1449 or F2757 related to
D1776/D1776M Practice for Conditioning and Testing Tex-
industrial or home laundering.
tiles
1.5 This standard should be used to evaluate and describe
D2261 Test Method for Tearing Strength of Fabrics by the
the properties of materials, products, or assemblies in response
Tongue (Single Rip) Procedure (Constant-Rate-of-
to heat and flame under controlled laboratory conditions. It
Extension Tensile Testing Machine)
D2724 Test Method for Bond Strength of Bonded, Fused,
and Laminated Apparel Fabrics
This performance specification is under the jurisdiction of ASTM Committee
F18 on Electrical Protective Equipment for Workers and is the direct responsibility
of Subcommittee F18.65 on Wearing Apparel. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2022. Published April 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1994. Last previous edition approved in 2020 as F1506–20a. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F1506-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1506−22
D3776/D3776M Test Methods for Mass Per Unit Area ISO/IEC17065 Conformityassessment—Requirementsfor
(Weight) of Fabric bodies certifying products, processes and services
D3786 Test Method for Bursting Strength of Textile ISO 20471 High visibility clothing — Test methods and
Fabrics—Diaphragm Bursting Strength Tester Method requirements
D5034 TestMethodforBreakingStrengthandElongationof 2.7 NFPA Standard:
Textile Fabrics (Grab Test) NFPA 2112 Standard on Flame-Resistant Clothing for Pro-
D6413 Test Method for Flame Resistance of Textiles (Ver- tection of Industrial Personnel Against Short-Duration
tical Test) Thermal Exposures from Fire
D7138 Test Method to Determine Melting Temperature of
3. Terminology
Synthetic Fibers
F1449 Guide for Industrial Laundering Care and Mainte-
3.1 Definitions—For definitions of textile terms used in this
nance of Flame Resistant or Arc Rated Clothing performance specification, refer to Terminology D123.
F1891 Specification for Arc and Flame Resistant Rainwear
3.2 Definitions of Terms Specific to This Standard:
F1959/F1959M TestMethodforDeterminingtheArcRating
3.2.1 afterflame,n—persistentflamingofamaterialafterthe
of Materials for Clothing
ignition source has been removed.
F2178 Specification for Arc Rated Eye or Face Protective
3.2.1.1 Discussion—In arc testing, a visible flaming on or
Products
near a test specimen which persists after the arc exposure has
F2675/F2675M TestMethodforDeterminingArcRatingsof
ended.Theafterflameceaseswhenflamingisnolongervisible.
Hand Protective Products Developed and Used for Elec-
3.2.2 afterflame time, n—the length of time for which a
trical Arc Flash Protection
material continues to flame after the ignition source has been
F2757 Guide for Home Laundering Care and Maintenance
removed.
of Flame Resistant or Arc Rated Clothing
3.2.2.1 Discussion—In arc testing, the length of time for
F2894 Test Method for Evaluation of Materials, Protective
which a specimen continues to exhibit visible flaming as
Clothing, and Equipment for Heat Resistance Using a Hot
determined by a time display video recording of the specimen
Air Circulating Oven
during arc testing.
2.2 AATCC Test Methods:
3.2.3 arc rating, n—value attributed to materials that de-
Method 61 Colorfastness to Washing, Domestic and
scribes their performance to exposure to an electrical arc
Laundering, Commercial: Accelerated
discharge.
Method 132 Colorfastness to Dry-Cleaning
3.2.3.1 Discussion—The arc rating is expressed in cal/cm
Method 135 Dimensional Changes Automatic Home Laun-
and is derived from the determined value of ATPV or E
dering of Woven and Knitted Fabrics BT
(should a material system exhibit a breakopen response below
Method 158 Dimensional Changes on Drycleaning in Per-
the ATPV value).
chloroethylene: Machine Method
3.2.4 arc thermal performance value (ATPV), n—in arc
2.3 ANSI/ISEA Standards:
testing,theincidentenergyonamaterialoramultilayersystem
107-2015 American National Standard for High-Visibility
of materials that results in a 50 % probability that sufficient
Safety Apparel and Accessories
heat transfer through the tested specimen is predicted to cause
125-2014 American National Standard for Conformity As-
the onset of a second-degree skin burn injury based on the
sessment of Safety and Personal Protective Equipment
9 2 2
Stoll curve, kW/m (cal/cm ).
2.4 CSA Standard:
CSA Z96 High-Visibility Safety Apparel 3.2.5 bibs and straps, n—as related to electric arc rated
protective clothing, a work garment for lower torso coverage
2.5 Federal Standards:
that blends trouser functionality with a more open waist. This
29 CFR 1910.138 Hand Protection
garment is supported by shoulder straps (straps) with front
2.6 ISO Standards:
and/or rear fabric panels (bibs) versus belts on traditional
ISO 9001 Quality management systems — Requirements
trousers.
ISO/IEC 17025 General requirements for the competence of
testing and calibration laboratories 3.2.6 breakopen threshold energy (E ), n—the incident
BT
energy on a material or material system that results in a 50 %
probability of breakopen.
2 2
AATCC Technical Manual, available from American Association of Textile
3.2.6.1 Discussion—This is the value in J/cm (cal/cm )
Chemists and Colorists, PO Box 12215, Research Triangle Park, NC 27709-2215.
determined by use of logistic regression analysis representing
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the energy at which breakopen of the layer occurred.
4th Floor, New York, NY 10036, http://www.ansi.org and International Safety
EquipmentAssociation (ISEA), 1901 North Moore Street Suite #808Arlington, VA
22209-1762, USA, https://www.safetyequipment.org.
5 8
Available from Canadian Standards Association (CSA), 178 Rexdale Blvd., Available from National Fire Protection Association (NFPA), 1 Batterymarch
Toronto, ON M9W 1R3, Canada, http://www.csagroup.org. Park, Quincy, MA 02169-7471, http://www.nfpa.org.
6 9
Available from Occupational Safety and Health Administration (OSHA), 200 Derivedfrom:Stoll,A.M.,andChianta,M.A.,“MethodandRatingSystemfor
Constitution Ave., NW, Washington, DC 20210, http://www.osha.gov. Evaluations of Thermal Protection,” Aerospace Medicine, Vol 40, 1969, pp.
Available from International Organization for Standardization (ISO), ISO 1232-1238 and Stoll,A. M., and Chianta, M.A., “Heat Transfer through Fabrics as
Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Related to Thermal Injury,” Transactions—New York Academy of Sciences, Vol 33,
Geneva, Switzerland, http://www.iso.org. 7, Nov. 1971, pp. 649-670.
F1506−22
3.2.7 conformance, n—a determination based on test data grams per square meter (ounces per square yard), that is used
that a product meets the requirements of a performance to generate the fabric’s arc rating according to Test Method
specification. F1959/F1959M.
3.2.13.1 Discussion—This weight is sometimes referred to
3.2.8 critical components, n—items used in the manufacture
as "AAD" or "Average Areal Density" on arc test reports.
of flame resistant and electric arc rated protective clothing
Before recording this weight, fabric is prepared in accordance
including but not limited to fabric, zippers, thread, visibility
with the preparation instructions of Test Method F1959/
enhancements, repair patches.
F1959M without conditioning in accordance with Practice
3.2.8.1 Discussion—Any component with design require-
D1776/D1776M. Weight of the prepared fabric is required to
ments or testing requirements stated in this standard is consid-
be recorded prior to arc testing.
ered a critical component.
3.2.14 fabric weight, nominal, n—The target mass per unit
3.2.9 design test, n—for arc and flame resistant textile
area expressed in grams per square meter (ounces per square
materials,onemadeonasampletreatedasrepresentativeofan
yard), for all production fabrics.
industrial product; these tests will not generally be repeated in
3.2.14.1 Discussion—This is the official published weight
quantity production.
and should not change once established for each unique fabric
3.2.9.1 Discussion—Perform the design test only when a
identifier. Manufacturers may have different acceptable vari-
new or modified textile material, that is, fabric, is used to
ances to the published weights.
manufacture apparel.Amodification in the fabric could be, but
3.2.15 findings—miscellaneous fabrics in garments such as
is not limited to, any of the following: the supplier,
zipper tapes, linings, pockets, waistbands, and facings.
composition, weave type, weight, or dyeing and finishing
process.
3.2.16 flame-resistant cloth face covering (FRCFC), n—a
flame-resistant fabric-based garment, primarily covering the
3.2.10 fabric identifier, n—for electric arc protective
nose and mouth, designed to reduce community spread of
clothing, a unique indicator used to directly associate a specific
biological hazards.
flame resistant fabric and its manufacturing and performance
information.
3.2.16.1 Discussion—FR Cloth Face Coverings are not
3.2.10.1 Discussion—As related to electric arc protective
designed to provide arc protection for the face, head, or neck.
clothing, fabric manufacturing information includes, but is not
3.2.17 garment tracking and identification code, n—for
limitedtothematerialsofconstruction(forexample,fibersand
electric arc protective clothing,auniqueidentifierorcodeused
the chemical treatment system if used), fabric design (for
to directly associate a specific flame resistant garment of single
example, weave, knit, or nonwoven structure information,
or multilayer construction and its manufacturing and perfor-
nominal basis weight and thickness, dyeing information if
mance information.
required, and flame resistant chemical treatment specifics if
3.2.17.1 Discussion—As related to electric arc protective
required), and Fabric Producer information. Fabric perfor-
clothing, garment manufacturing information includes, but is
mance information includes, but is not limited to the fabric
not limited to the materials of construction (sewing thread,
performance testing results for the performance specification
fabrics, fasteners, closures, and associated hardware), fabric
requirements noted within this standard.
informationutilizedingarmentdesign(forexample,singleand
3.2.11 fabric producer, n—for electric arc protective
multilayer Fabric Producer information and fabric lot
clothing, the manufacturer(s) who produce and/or are respon-
information), garment design information (for example, fabric
sible for the quality assurance testing and electric arc rating of
layering information for multi-layer systems), and garment
a finished fabric used in garment construction.
design information (for example, garment assembly facility
3.2.11.1 Discussion—As related to electric arc protective
identifier and identification number, lot number, or serial
clothing, an arc protective finished fabric is comprised of any
number). Garment performance information includes, but is
or all of the following: (1) a planar woven, knit, or nonwoven
not limited to the overall fabric system performance testing
structure produced from fibers and/or yarns, (2) is colored
results for the performance specification requirements noted
(dyed, pigmented, or otherwise meeting a garment manufac-
within this standard (for single or multilayer garment systems).
turer specification), and (3) is treated with flame retardant
3.2.18 momentary electric arc—a discharge of electricity
chemicals where required to meet the flame resistance require-
through a gaseous media, normally characterized by a voltage
ments identified in this standard.
drop in the immediate vicinity of the electrodes, approximately
3.2.12 fabric weight, actual, n—the measured value of a equal to the ionization potential of the gaseous media.
sample of fabric mass per unit area expressed in grams per
3.2.19 protective clothing, n—as related to electric arc
square meter (ounces per square yard), from a lot of fabric as
ratedgarments,anitemofclothingthatisspecificallydesigned
produced by the fabric manufacturer. This measurement is
and constructed for the intended purpose of covering all, or
done in accordance with Test Methods D3776/D3776M before
partsofthebody,toreducetheseverityofinjurywhenexposed
washing and after conditioning in accordance with Test
to flames and electric arcs.
Method D1776/D1776M.
3.2.19.1 Discussion—Protective clothing can include a va-
3.2.13 fabric weight, arc test, n—The measured value of a riety of items designed, constructed, and intended to be worn
specific sample of the fabric mass per unit area expressed in on the body.
F1506−22
3.2.20 radiant heat—heat communicated by energy propa- ongoing risk assessment by workers and supervisors helps to
gatedthroughspaceandtransmittedbyelectromagneticwaves. confirm that the location and distance from their position, to
anyhazardhavinganincidentenergy,isnotgreaterthanthearc
3.2.21 thermal hazard—the heat energy sufficient to cause
rating (ATPV or Ebt) of the protective clothing being worn.
burn injury to human tissue subjected to a momentary electric
arc.
4.3 Because work practices can vary due to many factors,
the user purchasing this protective clothing is responsible to
3.2.22 trims and findings, n—in garment manufacturing,the
prepare complete and detailed instructions and policies regard-
generic term used to identify various component
ing the use of this protective clothing. This allows for risk
subassemblies, any of which can be used individually, or in
assessmentofhazards,workpractices,andotherconcernstobe
combination,forthemanufacturingofgarmentsorothertextile
addressed.
structures, excluding primary fabric.
3.2.22.1 Discussion—These component subassemblies
5. Fabric Requirements
include, but are not limited to, slide fasteners (zippers), hook
and loop (touch fasteners), patches, emblems, visibility
5.1 Material tests shall be performed on textile materials as
enhancements, insignias, linings, pockets, waistbands, and
they are delivered to the clothing manufacturer.
facings.
5.1.1 Material tests may be performed on samples taken
from finished garments.
3.2.23 user—the employer or entity purchasing the equip-
ment to be utilized by workers for their protection; in the
5.2 Fabric shall be lot tested as follows:
absence of such an employer or entity, the individual purchas-
5.2.1 Perform flammability per 7.6 before laundering on
ing and utilizing the protective equipment.
every lot.
3.2.24 visibility enhancements—as related to electric arc 5.2.2 Perform 7.1, 7.2 (or 7.3 for knits), 7.5, 7.6 after
laundering,and7.8onevery50000ydsofmanufacturedfabric
rated protective clothing, retroreflective and fluorescent subas-
semblies that are attached to the protective clothing to improve or the manufactured yardage, or every 12 months, whichever
comes first, or the frequency can be determined by a docu-
wearer conspicuity in different light conditions.
3.2.24.1 Discussion—Visibility enhancements can be at- mented statistically based sampling plan as defined in the
manufacturer’s quality program.
tached to electric arc rated protective clothing by either of two
means: stitching or thermal heat fusing. Conspicuity require-
5.3 Design tests shall be run on the original and when
ments are outside the scope of this standard. Examples of
changes are made to flame resistant textile materials, for
conspicuity standards include but are not limited to ANSI/
example, fiber type, yarn type, weaving style, fabric weight,
ISEA 107, ISO 20471, CSA Z96.
dyeing, or finishing procedure.
4. Significance and Use
6. Garment Requirements
4.1 This specification provides performance properties for
6.1 Thread, trims and findings, and fasteners or closures
electric arc rated protective clothing using objective data that
usedingarmentconstructionshallnotcontributetotheseverity
report the measurable results from recognized test methods.
of injuries to the wearer in the event of a momentary electric
These measurable results provide information that the user can
arc and related thermal exposure.
reference when selecting flame resistant and electric arc rated
6.1.1 Sewing thread utilized in the construction of garments
protective clothing.
shall be made of an inherently flame-resistant fiber and shall
4.1.1 This specification identifies the criteria for evaluating
not melt below a temperature of 260 °C (500 °F) when tested
the performance of fabrics used to make electric arc rated
in accordance with Test Method D7138. Only three specimens
protective clothing.
are required to be tested.
4.1.2 This specification identifies the criteria for evaluating
6.1.2 Fasteners or Closures
the performance of trims and findings and visibility enhance-
6.1.2.1 All slide fastener tape utilized in the construction of
ments used for the manufacture of electric arc rated protective
flame-resistant garments shall be made of inherently flame-
clothing.
resistant materials.
4.1.3 This specification identifies the criteria for evaluating
6.1.2.2 Metal fasteners or closures shall be covered with a
the structural integrity of the assembly used to construct the
layer of material between the fastener or closure and the skin.
electric arc rated protective clothing.
The material used for this purpose shall meet the requirements
4.1.4 The users can incorporate the information in this
of this performance specification.
specification for purchase contracts to ensure that the quality
NOTE1—Whenmetalfastenersorclosures,forexample,zippers,snaps,
controls used for the manufacturing of the protective clothing
or buttons, or a combination thereof, are used in a manner in which they
meet the performance requirements identified in the standard.
areincontactwiththeskin,theycanincreaseheattransferandburninjury
4.1.5 This specification provides guidelines for acceptable
due to heat conduction or melting onto the skin.
repairs.
6.1.2.3 Specimens of hardware used in the construction of
4.2 The selection and use of any flame resistant and electric flame-resistant garments, including but not limited to buttons,
arc rated protective clothing requires a vigilant and ongoing fasteners, and closures, when visible on the outside of the
assessment by the worker and the supervisory personnel to any garment, shall be tested for heat resistance according to Test
other high energy hazards in the surrounding area. This Method F2894. The oven temperature shall be 260 +8/-0 °C
F1506−22
(500 +14/-0 °F) and the oven exposure time shall be 5 min + 6.2 The properties of materials for basic protection level
15/-0 s. Specimens shall not melt and drip, separate, or ignite wearing apparel shall conform to the specifications in Table 1,
and shall remain sufficiently functional to allow the garment to Table2andTable3whenevaluatedinaccordancewithSection
be removed. 7.
6.1.3 Visibility enhancements, which are designed to be
NOTE 3—Physical characteristic tests and values in Section 7 and 1 and
attached to electric arc rated garments shall be tested and
Table 2 are based on experience from woven and knit fabrics currently in
certified to NFPA2112 by the visibility enhancement
use and may not be applicable to other fabric types.
NOTE 4—Characteristics (for example, clothing ensembles, design, and
manufacturer,orshallbetestedinIAW6.1.3.1or6.1.3.2.Tests
laundry maintenance) of protective garments for basic protection level
specified in 6.1.3.1 or 6.1.3.2 shall be repeated when changes
wearing apparel should be guided by the information contained in
are made to the design of the materials used in the visibility
Appendix X1.
enhancement or at least bi-annually, that is, once every 6
6.3 All repairs and alterations to arc and flame-resistant
months.
garments shall be performed compliant to the requirements in
NOTE 2—This testing is intended to be on newly received product, not
this specification. Repairs to critical seams shall be made with
existing, previously tested material that has been in inventory.
flame-resistant thread that meets the requirements of 6.1.1.
6.1.3.1 Visibility enhancements, which are designed to be
6.3.1 Patches added to the clothing to repair any rip smaller
attached to electric arc rated garments by means of stitching, 1
than ⁄2 in. shall be made with FR fabric and FR thread (if
shall be tested independent of the fabric if available in
sewn).
sufficient sample width, and shall not melt and drip and shall
6.3.2 Patches added to the clothing to repair any rip larger
demonstrate no more than a 2-s after-flame time when tested 1
than ⁄2 in. shall be made with FR fabric that has an arc rating
using Test Method D6413. When visibility enhancement is not
equal to or greater than that of the garment and FR thread (if
available in sufficient sample width, the width of the sample
sewn).
shall be increased by attaching representative fabrics to the
NOTE 5—For extensive alterations, the manufacturer should be con-
sides of the sample and shall not melt and drip and shall
sulted for guidance.
demonstrate no more than a 2-s after-flame time when tested
6.4 Garments shall be labeled with the following informa-
using Test Method D6413. In both cases, char length and
tion:
afterglow time shall not be measured.
6.4.1 Meets requirements of Performance Specification
6.1.3.2 Visibility enhancements which are designed to be
F1506,
attached to an electric arc rated garment by means of thermal
6.4.2 Manufacturer’s name,
fusing, are tested after first being attached to the arc rated
fabric used in the garment and shall not melt and drip and shall 6.4.3 Fabric identifier,
demonstrate not more than a 2-s after-flame time when tested 6.4.3.1 ThefabricidentifiershallprovidetheFabricProduc-
using Test Method D6413. Char length and afterglow time er’s name, and the Fabric Producer’s style number or fabric
namewhichcomplieswiththisperformancespecification.This
shall not be measured.
TABLE 1 Requirements, Woven Fabrics
Fabric Weight Ranges, oz/yd
Section
Reference
3.0–5.9 6.0–8.4 8.5 and higher
Characteristic:
Breaking load, min, N (lbf) 134 (30) 179 (40) 223 (50) 7.1
Tear resistance, min, N (lbf) 11 (2.5) 18 (4.0) 22 (5.0) 7.2
Colorfastness:
Laundering shade change Report measured values and laundering method 7.4.1
Dry-cleaning shade change Report measured values 7.4.2
Dimensional Change: Report wash method and specified max along with results 7.5
OR: ±5 % ±5 % ±5 % 7.5.1
A
Flammability Before Laundering:
Char length, max, mm (in.) 152 (6.0) 152 (6.0) 152 (6.0) 7.6
Afterflame time, max, s 2 2 2 7.6
Flammability After Laundering:
Char length, max, mm (in.) 152 (6.0) 152 (6.0) 152 (6.0) 7.6
Afterflame time, max, s 2 2 2 7.6
Arc Test Results:
2 B
Arc rating (cal/cm ) Report measured values 7.7
Arc test fabric weight Report measured values 7.7
Afterflame time, max, s (for single layer arc test specimens) 5 5 5 7.7.1
Actual/Nominal Fabric Weight: Report measured/declared values 7.8
A
No melting and dripping of the test material is permitted.
B
When the arc rating represents the ATPV, it shall be designated as arc rating (ATPV). When arc rating represents the E , it shall be designated as arc rating (E ). Arc
BT BT
rating is determined and reported for a fabric that meets all the requirements of this performance specification to provide guidance on the performance of the fabric in arc
exposure testing. There is no minimum required value for arc rating. For additional information on ATPV and E , see Test Method F1959
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1506 − 20a F1506 − 22
Standard Performance Specification for
Flame Resistant and Electric Arc Rated Protective Clothing
Worn by Workers Exposed to Flames and Electric Arcs
This standard is issued under the fixed designation F1506; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This performance specification identifies minimum performance requirements to determine the (a) arc rating of fabrics, (b)
flame resistance of fabrics and subassemblies, (c) mechanical durability of the fabrics and subassemblies, (d) the minimum garment
construction and performance requirements, and (e) the garment labeling requirements for the completed protective clothing worn
by workers exposed to flames and electric arcs.
1.1.1 The minimum requirements for garment labeling are intended to provide end users with adequate information to select
garments with the appropriate arc rating.
1.1.2 End users are required to perform an assessment to determine the level of hazard and the required arc rating of the protective
clothing for their individual hazards.
1.1.2.1 The end user risk assessments are outside the scope of this standard.
1.2 This performance specification does not address coated or laminated protective clothing commonly used for rainwear
applications in an arc hazard environment. Performance requirements related to this category of protective clothing are detailed
in Specification F1891.
1.3 This performance specification does not address hand protection. Performance and test requirements related to hand protection
are detailed in OSHA 1910.138, Specification D120, and Test Method F2675/F2675M.
1.4 The care and maintenance requirements for laundering electric arc flash protective clothing are outside the scope of this
standard. Refer to Guides F1449 or F2757 related to industrial or home laundering.
1.5 This standard should be used to evaluate and describe the properties of materials, products, or assemblies in response to heat
and flame under controlled laboratory conditions. It should not be used to describe or appraise the fire hazard or fire risk of
materials, products, or assemblies under actual fire conditions.
1.5.1 The results of this evaluation may be used as elements of a fire-risk assessment that takes into account all of the factors that
are pertinent to an assessment of the fire hazard of a particular end use.
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This performance specification is under the jurisdiction of ASTM Committee F18 on Electrical Protective Equipment for Workers and is the direct responsibility of
Subcommittee F18.65 on Wearing Apparel.
Current edition approved Oct. 1, 2020March 1, 2022. Published October 2020April 2022. Originally approved in 1994. Last previous edition approved in 2020 as
F1506–20.–20a. DOI: 10.1520/F1506-20A.10.1520/F1506-22.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1506 − 22
1.7 The following precautionary caveat pertains only to the test methods portion, Section 7, of this performance specification:
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the
user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D120 Specification for Rubber Insulating Gloves
D123 Terminology Relating to Textiles
D1424 Test Method for Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus
D1776/D1776M Practice for Conditioning and Testing Textiles
D2261 Test Method for Tearing Strength of Fabrics by the Tongue (Single Rip) Procedure (Constant-Rate-of-Extension Tensile
Testing Machine)
D2724 Test Method for Bond Strength of Bonded, Fused, and Laminated Apparel Fabrics
D3776/D3776M Test Methods for Mass Per Unit Area (Weight) of Fabric
D3786 Test Method for Bursting Strength of Textile Fabrics—Diaphragm Bursting Strength Tester Method
D5034 Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test)
D6413 Test Method for Flame Resistance of Textiles (Vertical Test)
D7138 Test Method to Determine Melting Temperature of Synthetic Fibers
F1449 Guide for Industrial Laundering Care and Maintenance of Flame Resistant or Arc Rated Clothing
F1891 Specification for Arc and Flame Resistant Rainwear
F1959/F1959M Test Method for Determining the Arc Rating of Materials for Clothing
F2178 Specification for Arc Rated Eye or Face Protective Products
F2675/F2675M Test Method for Determining Arc Ratings of Hand Protective Products Developed and Used for Electrical Arc
Flash Protection
F2757 Guide for Home Laundering Care and Maintenance of Flame Resistant or Arc Rated Clothing
F2894 Test Method for Evaluation of Materials, Protective Clothing, and Equipment for Heat Resistance Using a Hot Air
Circulating Oven
2.2 AATCC Test Methods:
Method 61 Colorfastness to Washing, Domestic and Laundering, Commercial: Accelerated
Method 132 Colorfastness to Dry-Cleaning
Method 135 Dimensional Changes Automatic Home Laundering of Woven and Knitted Fabrics
Method 158 Dimensional Changes on Drycleaning in Perchloroethylene: Machine Method
2.3 ANSI/ISEA Standards:
107-2015 American National Standard for High-Visibility Safety Apparel and Accessories
125-2014 American National Standard for Conformity Assessment of Safety and Personal Protective Equipment
2.4 CSA Standard:
CSA Z96 High-Visibility Safety Apparel
2.5 Federal Standards:
29 CFR 1910.138 Hand Protection
2.6 ISO Standards:
ISO 9001 Quality management systems — Requirements
ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories
ISO/IEC 17065 Conformity assessment — Requirements for bodies certifying products, processes and services
ISO 20471 High visibility clothing — Test methods and requirements
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
AATCC Technical Manual, available from American Association of Textile Chemists and Colorists, PO Box 12215, Research Triangle Park, NC 27709-2215.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org and International Safety Equipment
Association (ISEA), 1901 North Moore Street Suite #808 Arlington, VA 22209-1762, USA, https://www.safetyequipment.org.
Available from Canadian Standards Association (CSA), 178 Rexdale Blvd., Toronto, ON M9W 1R3, Canada, http://www.csagroup.org.
Available from Occupational Safety and Health Administration (OSHA), 200 Constitution Ave., NW, Washington, DC 20210, http://www.osha.gov.
Available from International Organization for Standardization (ISO), ISO Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
Switzerland, http://www.iso.org.
F1506 − 22
2.7 NFPA Standard:
NFPA 2112 Standard on Flame-Resistant Clothing for Protection of Industrial Personnel Against Short-Duration Thermal
Exposures from Fire
3. Terminology
3.1 Definitions—For definitions of textile terms used in this performance specification, refer to Terminology D123.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 afterflame, n—persistent flaming of a material after the ignition source has been removed.
3.2.1.1 Discussion—
In arc testing, a visible flaming on or near a test specimen which persists after the arc exposure has ended. The afterflame ceases
when flaming is no longer visible.
3.2.2 afterflame time, n—the length of time for which a material continues to flame after the ignition source has been removed.
3.2.2.1 Discussion—
In arc testing, the length of time for which a specimen continues to exhibit visible flaming as determined by a time display video
recording of the specimen during arc testing.
3.2.3 arc rating, n—value attributed to materials that describes their performance to exposure to an electrical arc discharge.
3.2.3.1 Discussion—
The arc rating is expressed in cal/cm and is derived from the determined value of ATPV or E (should a material system exhibit
BT
a breakopen response below the ATPV value).
3.2.4 arc thermal performance value (ATPV), n—in arc testing, the incident energy on a material or a multilayer system of
materials that results in a 50 % probability that sufficient heat transfer through the tested specimen is predicted to cause the onset
9 2 2
of a second-degree skin burn injury based on the Stoll curve, kW/m (cal/cm ).
3.2.5 bibs and straps, n—as related to electric arc rated protective clothing, a work garment for lower torso coverage that blends
trouser functionality with a more open waist. This garment is supported by shoulder straps (straps) with front and/or rear fabric
panels (bibs) versus belts on traditional trousers.
3.2.6 breakopen threshold energy (E ), n—the incident energy on a material or material system that results in a 50 % probability
BT
of breakopen.
3.2.6.1 Discussion—
2 2
This is the value in J/cm (cal/cm ) determined by use of logistic regression analysis representing the energy at which breakopen
of the layer occurred.
3.2.7 conformance, n—a determination based on test data that a product meets the requirements of a performance specification.
3.2.8 critical components, n—items used in the manufacture of flame resistant and electric arc rated protective clothing including
but not limited to fabric, zippers, thread, visibility enhancements, repair patches.
3.2.8.1 Discussion—
Any component with design requirements or testing requirements stated in this standard is considered a critical component.
3.2.9 design test, n—for arc and flame resistant textile materials, one made on a sample treated as representative of an industrial
product; these tests will not generally be repeated in quantity production.
3.2.9.1 Discussion—
Available from National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02169-7471, http://www.nfpa.org.
Derived from: Stoll, A. M., and Chianta, M. A., “Method and Rating System for Evaluations of Thermal Protection,” Aerospace Medicine, Vol 40, 1969, pp. 1232-1238
and Stoll, A. M., and Chianta, M. A., “Heat Transfer through Fabrics as Related to Thermal Injury,” Transactions—New York Academy of Sciences, Vol 33(7) , Nov. 1971,
pp. 649-670.Derived from: Stoll, A. M., and Chianta, M. A., “Method and Rating System for Evaluations of Thermal Protection,” Aerospace Medicine, Vol 40, 1969, pp.
1232-1238 and Stoll, A. M., and Chianta, M. A., “Heat Transfer through Fabrics as Related to Thermal Injury,” Transactions—New York Academy of Sciences, Vol 33, 7, Nov.
1971, pp. 649-670.
F1506 − 22
Perform the design test only when a new or modified textile material, that is, fabric, is used to manufacture apparel. A modification
in the fabric could be, but is not limited to, any of the following: the supplier, composition, weave type, weight, or dyeing and
finishing process.
3.2.10 fabric identifier, n—for electric arc protective clothing, a unique indicator used to directly associate a specific flame
resistant fabric and its manufacturing and performance information.
3.2.10.1 Discussion—
As related to electric arc protective clothing, fabric manufacturing information includes, but is not limited to the materials of
construction (for example, fibers and the chemical treatment system if used), fabric design (for example, weave, knit, or nonwoven
structure information, nominal basis weight and thickness, dyeing information if required, and flame resistant chemical treatment
specifics if required), and Fabric Producer information. Fabric performance information includes, but is not limited to the fabric
performance testing results for the performance specification requirements noted within this standard.
3.2.11 fabric producer, n—for electric arc protective clothing, the manufacturer(s) who produce and/or are responsible for the
quality assurance testing and electric arc rating of a finished fabric used in garment construction.
3.2.11.1 Discussion—
As related to electric arc protective clothing, an arc protective finished fabric is comprised of any or all of the following: (1) a
planar woven, knit, or nonwoven structure produced from fibers and/or yarns, (2) is colored (dyed, pigmented, or otherwise
meeting a garment manufacturer specification), and (3) is treated with flame retardant chemicals where required to meet the flame
resistance requirements identified in this standard.
3.2.12 fabric weight, actual, n—the measured value of a sample of fabric mass per unit area expressed in grams per square meter
(ounces per square yard), from a lot of fabric as produced by the fabric manufacturer. This measurement is done in accordance
with Test Methods D3776/D3776M before washing and after conditioning in accordance with Test Method D1776/D1776M.
3.2.13 fabric weight, arc test, n—The measured value of a specific sample of the fabric mass per unit area expressed in grams per
square meter (ounces per square yard), that is used to generate the fabric’s arc rating according to Test Method F1959/F1959M.
3.2.13.1 Discussion—
This weight is sometimes referred to as "AAD" or "Average Areal Density" on arc test reports. Before recording this weight, fabric
is prepared in accordance with the preparation instructions of Test Method F1959/F1959M without conditioning in accordance with
Practice D1776/D1776M. Weight of the prepared fabric is required to be recorded prior to arc testing.
3.2.14 fabric weight, nominal, n—The target mass per unit area expressed in grams per square meter (ounces per square yard),
for all production fabrics.
3.2.14.1 Discussion—
This is the official published weight and should not change once established for each unique fabric identifier. Manufacturers may
have different acceptable variances to the published weights.
3.2.15 findings—miscellaneous fabrics in garments such as zipper tapes, linings, pockets, waistbands, and facings.
3.2.16 flame-resistant cloth face covering (FRCFC), n—a flame-resistant fabric-based garment, primarily covering the nose and
mouth, designed to reduce community spread of biological hazards.
3.2.16.1 Discussion—
FR Cloth Face Coverings are not designed to provide arc protection for the face, head, or neck.
3.2.17 garment tracking and identification code, n—for electric arc protective clothing, a unique identifier or code used to directly
associate a specific flame resistant garment of single or multilayer construction and its manufacturing and performance
information.
3.2.17.1 Discussion—
As related to electric arc protective clothing, garment manufacturing information includes, but is not limited to the materials of
construction (sewing thread, fabrics, fasteners, closures, and associated hardware), fabric information utilized in garment design
(for example, single and multilayer Fabric Producer information and fabric lot information), garment design information (for
example, fabric layering information for multi-layer systems), and garment design information (for example, garment assembly
facility identifier and identification number, lot number, or serial number). Garment performance information includes, but is not
F1506 − 22
limited to the overall fabric system performance testing results for the performance specification requirements noted within this
standard (for single or multilayer garment systems).
3.2.18 momentary electric arc—a discharge of electricity through a gaseous media, normally characterized by a voltage drop in
the immediate vicinity of the electrodes, approximately equal to the ionization potential of the gaseous media.
3.2.19 protective clothing, n—as related to electric arc rated garments, an item of clothing that is specifically designed and
constructed for the intended purpose of covering all, or parts of the body, to reduce the severity of injury when exposed to flames
and electric arcs.
3.2.19.1 Discussion—
Protective clothing can include a variety of items designed, constructed, and intended to be worn on the body.
3.2.20 radiant heat—heat communicated by energy propagated through space and transmitted by electromagnetic waves.
3.2.21 thermal hazard—the heat energy sufficient to cause burn injury to human tissue subjected to a momentary electric arc.
3.2.22 trims and findings, n—in garment manufacturing, the generic term used to identify various component subassemblies, any
of which can be used individually, or in combination, for the manufacturing of garments or other textile structures, excluding
primary fabric.
3.2.22.1 Discussion—
These component subassemblies include, but are not limited to, slide fasteners (zippers), hook and loop (touch fasteners), patches,
emblems, visibility enhancements, insignias, linings, pockets, waistbands, and facings.
3.2.23 user—the employer or entity purchasing the equipment to be utilized by workers for their protection; in the absence of such
an employer or entity, the individual purchasing and utilizing the protective equipment.
3.2.24 visibility enhancements—as related to electric arc rated protective clothing, retroreflective and fluorescent subassemblies
that are attached to the protective clothing to improve wearer conspicuity in different light conditions.
3.2.24.1 Discussion—
Visibility enhancements can be attached to electric arc rated protective clothing by either of two means: stitching or thermal heat
fusing. Conspicuity requirements are outside the scope of this standard. Examples of conspicuity standards include but are not
limited to ANSI/ISEA 107, ISO 20471, CSA Z96.
4. Significance and Use
4.1 This specification provides performance properties for electric arc rated protective clothing using objective data that report the
measurable results from recognized test methods. These measurable results provide information that the user can reference when
selecting flame resistant and electric arc rated protective clothing.
4.1.1 This specification identifies the criteria for evaluating the performance of fabrics used to make electric arc rated protective
clothing.
4.1.2 This specification identifies the criteria for evaluating the performance of trims and findings and visibility enhancements
used for the manufacture of electric arc rated protective clothing.
4.1.3 This specification identifies the criteria for evaluating the structural integrity of the assembly used to construct the electric
arc rated protective clothing.
4.1.4 The users can incorporate the information in this specification for purchase contracts to ensure that the quality controls used
for the manufacturing of the protective clothing meet the performance requirements identified in the standard.
4.1.5 This specification provides guidelines for acceptable repairs.
4.2 The selection and use of any flame resistant and electric arc rated protective clothing requires a vigilant and ongoing
assessment by the worker and the supervisory personnel to any other high energy hazards in the surrounding area. This ongoing
risk assessment by workers and supervisors helps to confirm that the location and distance from their position, to any hazard having
an incident energy, is not greater than the arc rating (ATPV or Ebt) of the protective clothing being worn.
F1506 − 22
4.3 Because work practices can vary due to many factors, the user purchasing this protective clothing is responsible to prepare
complete and detailed instructions and policies regarding the use of this protective clothing. This allows for risk assessment of
hazards, work practices, and other concerns to be addressed.
5. Materials and Manufacture Fabric Requirements
5.1 Material tests shall be performed on textile materials as they are delivered to the clothing manufacturer.
5.1.1 Material tests may be performed on samples taken from finished garments.
5.2 Lot size for the initial (without laundering) flammability test shall be 4572 m (5000 yd) of manufactured fabric or the
manufactured yardage, whichever is less. One sample of 1.0 m shall be taken from each lot. Fabric shall be lot tested as follows:
5.2.1 Perform flammability per 7.6 before laundering on every lot.
5.2.2 Perform 7.1, 7.2 (or 7.3 for knits), 7.5, 7.6 after laundering, and 7.8 on every 50 000 yds of manufactured fabric or the
manufactured yardage, or every 12 months, whichever comes first, or the frequency can be determined by a documented
statistically based sampling plan as defined in the manufacturer’s quality program.
5.3 Lot size for all other tests except design tests shall be 45 720 m (50 000 yd) or at least every three months, whichever is more
frequent. One sample of 4.0 m shall be taken from each lot.
5.3 Design tests shall be run on the original and when changes are made to flame resistant textile materials, for example, fiber type,
yarn type, weaving style, fabric weight, dyeing, or finishing procedure.
6. Garment Requirements
6.1 Thread, trims and findings, and fasteners or closures used in garment construction shall not contribute to the severity of injuries
to the wearer in the event of a momentary electric arc and related thermal exposure.
6.1.1 Sewing thread utilized in the construction of garments shall be made of an inherently flame-resistant fiber and shall not melt
below a temperature of 260°C (500°F) 260 °C (500 °F) when tested in accordance with Test Method D7138. Only three specimens
are required to be tested.
6.1.2 Fasteners or Closures
6.1.2.1 All slide fastener tape utilized in the construction of flame-resistant garments shall be made of inherently flame-resistant
materials.
6.1.2.2 Metal fasteners or closures shall be covered with a layer of material between the fastener or closure and the skin. The
material used for this purpose shall meet the requirements of this performance specification.
NOTE 1—When metal fasteners or closures, for example, zippers, snaps, or buttons, or a combination thereof, are used in a manner in which they are in
contact with the skin, they can increase heat transfer and burn injury due to heat conduction or melting onto the skin.
6.1.2.3 Specimens of hardware used in the construction of flame-resistant garments, including but not limited to buttons, fasteners,
and closures, when visible on the outside of the garment, shall be tested for heat resistance according to Test Method F2894. The
oven temperature shall be 260 +8/-0 °C (500 +14/-0 °F) and the oven exposure time shall be 5 min +15/-0 + 15/-0 s. Specimens
shall not melt and drip, separate, or ignite and shall remain sufficiently functional to allow the garment to be removed.
6.1.3 Visibility enhancements, which are designed to be attached to electric arc rated garments shall be tested and certified to
NFPA2112 by the visibility enhancement manufacturer, or shall be tested in IAW 6.1.3.1 or 6.1.3.2. Tests specified in 6.1.3.1 or
6.1.3.2 shall be repeated when changes are made to the design of the materials used in the visibility enhancement or at least
bi-annually, that is, once every 6 months.
NOTE 2—This testing is intended to be on newly received product, not existing, previously tested material that has been in inventory.
F1506 − 22
6.1.3.1 Visibility enhancements, which are designed to be attached to electric arc rated garments by means of stitching, shall be
tested independent of the fabric if available in sufficient sample width, and shall not melt and drip and shall demonstrate no more
than a 2-s after-flame time when tested using Test Method D6413. When visibility enhancement is not available in sufficient sample
width, the width of the sample shall be increased by attaching representative fabrics to the sides of the sample and shall not melt
and drip and shall demonstrate no more than a 2-s after-flame time when tested using Test Method D6413. In both cases, char
length and afterglow time shall not be measured.
6.1.3.2 Visibility enhancements which are designed to be attached to an electric arc rated garment by means of thermal fusing,
are tested after first being attached to the arc rated fabric used in the garment and shall not melt and drip and shall demonstrate
not more than a 2-s after-flame time when tested using Test Method D6413. Char length and afterglow time shall not be measured.
6.2 The properties of materials for basic protection level wearing apparel shall conform to the specifications in Table 1, Table 2
and Table 3 when evaluated in accordance with Section 7.
NOTE 3—Physical characteristic tests and values in Section 7 and 1 and Table 2 are based on experience from woven and knit fabrics currently in use
and may not be applicable to other fabric types.
NOTE 4—Characteristics (for example, clothing ensembles, design, and laundry maintenance) of protective garments for basic protection level wearing
apparel should be guided by the information contained in Appendix X1.
6.3 All repairs and alterations to arc and flame-resistant garments shall be performed compliant to the requirements in this
specification. Repairs to critical seams shall be made with flame-resistant thread that meets the requirements of 6.1.1.
6.3.1 Patches added to the clothing to repair any rip smaller than ⁄2 in. shall be made with FR fabric and FR thread (if sewn).
6.3.2 Patches added to the clothing to repair any rip larger than ⁄2 in. shall be made with FR fabric that has an arc rating equal
to or greater than that of the garment and FR thread (if sewn).
NOTE 5—For extensive alterations, the manufacturer should be consulted for guidance.
6.4 Garments shall be labeled with the following information:
6.4.1 Meets requirements of Performance Specification F1506,
TABLE 1 Requirements, Woven Fabrics
Fabric Weight Ranges, oz/yd
Section
Reference
3.0–5.9 6.0–8.4 8.5 and higher
Characteristic:
Breaking load, min, N (lbf) 134 (30) 179 (40) 223 (50) 7.1
Tear resistance, min, N (lbf) 11 (2.5) 18 (4.0) 22 (5.0) 7.2
Colorfastness:
Laundering shade change Report measured values and laundering method 7.4.1
Dry-cleaning shade change Report measured values 7.4.2
Dimensional Change: Report wash method and specified max along with results 7.5
OR: ±5 % ±5 % ±5 % 7.5.1
A
Flammability Before Laundering:
Char length, max, mm (in.) 152 (6.0) 152 (6.0) 152 (6.0) 7.6
Afterflame time, max, s 2 2 2 7.6
Flammability After Laundering:
Char length, max, mm (in.) 152 (6.0) 152 (6.0) 152 (6.0) 7.6
Afterflame time, max, s 2 2 2 7.6
Arc Test Results:
2 B
Arc rating (cal/cm ) Report measured values 7.7
Arc test fabric weight Report measured values 7.7
Afterflame time, max, s (for single layer arc test specimens) 5 5 5 7.7.1
Actual/Nominal Fabric Weight: Report measured/declared values 7.8
A
No melting and dripping of the test material is permitted.
B
When the arc rating represents the ATPV, it shall be designated as arc rating (ATPV). When arc rating represents the E , it shall be designated as arc rating (E ). Arc
BT BT
rating is determined and reported for a fabric that meets all the requirements of this performance specification to provide guidance on the performan
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