ASTM F1959/F1959M-05
(Test Method)Standard Test Method for Determining the Arc Thermal Performance Value of Materials for Clothing
Standard Test Method for Determining the Arc Thermal Performance Value of Materials for Clothing
SCOPE
1.1 This test method is used to measure the arc rating of materials intended for use as flame resistant clothing for workers exposed to electric arcs that would generate heat flux rates from 84 to 25120 kW/m 2 [2 to 600 cal/cm2].
1.2 This test method will measure the arc rating of materials which meet the following requirements: less than 150 mm [6 in.] char length and less than 2 s afterflame when tested in accordance with Test Method D 6413.
1.2.1 It is not the intent of this test method to evaluate non flame-resistant materials except where used as under layers in multiple-layer specimens.
1.3 The materials used in this test method are in the form of flat specimens.
1.4 This test method shall be used to measure and describe the properties of materials, products, or assemblies in response to convective and radiant energy generated by an electric arc under controlled laboratory conditions.
1.5 The values stated in SI units shall be regarded as standard except as noted. Within the text, alternate units are shown in brackets. The values stated in each system may not be exact equivalents therefore alternate systems must be used independently of the other. Combining values from the systems described in the text may result in nonconformance with the method.
1.6 This test method does not apply to electrical contact or electrical shock hazards.
1.7 This standard shall not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use.
1.8 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 and health practices and determine the applicability of regulatory requirements prior to use. For specific precautions, see Section .
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Designation:F1959/F1959M–05
Standard Test Method for
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Determining the Arc Rating of Materials for Clothing
This standard is issued under the fixed designation F1959/F1959M; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
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1.1 This test method is used to measure the arc rating of 2.1 ASTM Standards:
materials intended for use as flame resistant clothing for D123 Terminology Relating to Textiles
workers exposed to electric arcs that would generate heat flux D1776 Practice for Conditioning and Testing Textiles
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rates from 84 to 25 120 kW/m [2 to 600 cal/cm s]. D4391 Terminology Relating to the Burning Behavior of
1.2 Thistestmethodwillmeasurethearcratingofmaterials Textiles
which meet the following requirements: less than 150 mm [6 D6413 Test Method for Flame Resistance of Textile (Ver-
in.] char length and less than 2 s afterflame when tested in tical Test)
accordance with Test Method D6413. E457 TestMethodforMeasuringHeatTransferRateUsing
1.2.1 It is not the intent of this test method to evaluate non a Thermal Capacitance (Slug) Calorimeter
flame-resistant materials except where used as under layers in F 1494 Terminology Relating to Protective Clothing
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multiple-layer specimens. 2.2 ANSI/IEEE Standard:
1.3 Thematerialsusedinthistestmethodareintheformof Standard Dictionary of Electrical and Electronics Terms
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flat specimens. 2.3 AATCC Standard:
1.4 This test method shall be used to measure and describe AATCC Method 135-2001 Dimensional Changes in Auto-
thepropertiesofmaterials,products,orassembliesinresponse matic Home Laundering of Woven and Knit Fabrics
to convective and radiant energy generated by an electric arc
3. Terminology
under controlled laboratory conditions.
3.1 Definitions:
1.5 The values stated in SI units shall be regarded as
standard except as noted. Within the text, alternate units are 3.1.1 arc duration, n—time duration of the arc, s.
3.1.2 arc energy, vi dt, n—sum of the instantaneous arc
showninbrackets.Thevaluesstatedineachsystemmaynotbe
exact equivalents therefore alternate systems must be used voltage values multiplied by the instantaneous arc current
values multiplied by the incremental time values during the
independentlyoftheother.Combiningvaluesfromthesystems
arc, J.
described in the text may result in nonconformance with the
method. 3.1.3 arc gap, n—distance between the arc electrodes, cm
[in.].
1.6 This test method does not apply to electrical contact or
electrical shock hazards. 3.1.4 arc rating, n—value attributed to materials that de-
scribes their performance to exposure to an electrical arc
1.7 This standard shall not be used to describe or appraise
the fire hazard or fire risk of materials, products, or assemblies discharge.
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3.1.4.1 Discussion—The arc rating is expressed in cal/cm
under actual fire conditions. However, results of this test may
be used as elements of a fire assessment which takes into and is derived from the determined value of ATPV or E -
BT
(should a material system exhibit a breakopen response below
account all of the factors which are pertinent to an assessment
of the fire hazard of a particular end use. the ATPV value) derived from the determined value of ATPV
1.8 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory requirements prior to use. For specific
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precautions, see Section 7.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
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This test method is under the jurisdiction of ASTM Committee F18 on the ASTM website.
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Electrical Protective Equipment for Workers and is the direct responsibility of Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE),
Subcommittee F18.65 on Wearing Apparel. 445 Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331.
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Current edition approved Nov. 1, 2005. Published December 2005. Originally Technical Manual of the American Association of Textile Chemists and
publishedin1997.Lastpreviouseditionapprovedin2004asF1959/F1959M–04. Colorists.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F1959/F1959M–05
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or E (should a material system exhibit a breakopen respon
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