ASTM F1545-15a(2021)

Standard Specification for Plastic-Lined Ferrous Metal Pipe, Fittings, and Flanges

ABSTRACT
This specification covers factory-made plastic-lined ferrous metal pipe, fittings, and flanges for conveying corrosive fluids. Lining material shall be made from a resin that conforms to the requirements of this specification. Other requirements include mechanical properties, specific gravity, finish, dimensions, design, working pressure, working temperature, flange construction, venting, workmanship, performance, quality, marking, and packaging. High-temperature test, low-temperature test, steam-cold water cycling test, vacuum test, hydrostatic pressure test, and electrostatic test shall be done in accordance to the procedures of this specification.
SCOPE
1.1 This specification covers factory-made plastic-lined ferrous metal pipe, fittings, and flanges intended primarily for conveying corrosive fluids. Requirements for materials, workmanship, dimensions, design, fabrication, working pressure and temperatures, test methods, qualification requirements, and markings are included.  
1.1.1 This specification does not define the suitability of different liner materials to various chemical and operating environments. Refer to the manufacturer's chemical resistance data for suitability recommendations.  
1.1.2 This specification does not include products coated with plastics.  
1.2 This specification covers plastic-lined pipe, flanges, and fittings as listed in Table 1. Pressure limitations shall be in accordance with ASME B16 Standards, except reduced pressure limitations may be established by the manufacturer, considering both pressure and temperature limitations of the ferrous metal housing and the sealing ability of the liner.  
Note 1: In this specification, propylene plastics cover those materials defined as both polypropylene plastics and propylene plastics in Terminology F412. Both materials are identified as “PP” on the product. Note that this is at variance with Terminology D1600, where “PP” is the abbreviation for polypropylene.    
1.3 The plastic-lined flanged pipe and fitting assemblies are limited to temperatures shown in Table 2. End users should consult with manufacturers as to the likely result of using a particular lined piping component at temperatures below the rated minimum.  
Note 2: The temperature limitations are based on noncorrosive test conditions. Use in specific aggressive environments may alter temperature limitations. In such instances, specific temperature limits shall be established by mutual agreement between the purchaser and the manufacturer.    
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 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.  
1.6 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.

General Information

• Status: Published
• Publication Date: 30-Jun-2021
• ICS: 23.040.10 - Iron and steel pipes
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.11 - Composite

Relations

• Refers: ASTM A105/A105M-24 - Standard Specification for Carbon Steel Forgings for Piping Applications
• Effective Date: 15-Apr-2024
• Refers: ASTM A182/A182M-24 - Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
• Effective Date: 01-Mar-2024
• Refers: ASTM A312/A312M-24 - Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
• Effective Date: 01-Mar-2024
• Refers: ASTM A53/A53M-24 - Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
• Effective Date: 01-Mar-2024
• Refers: ASTM D4101-24 - Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials
• Effective Date: 01-Feb-2024
• Refers: ASTM F714-24 - Standard Specification for Polyethylene (PE) Plastic Pipe (DR-PR) Based on Outside Diameter
• Effective Date: 01-Feb-2024
• Refers: ASTM A126-04(2023) - Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings
• Effective Date: 01-Nov-2023
• Refers: ASTM A513/A513M-20 - Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing
• Effective Date: 01-May-2020
• Refers: ASTM A278/A278M-01(2020) - Standard Specification for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650 °F (350 °C)
• Effective Date: 01-May-2020
• Refers: ASTM F412-20 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Apr-2020
• Refers: ASTM A182/A182M-19a - Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
• Effective Date: 01-Nov-2019
• Refers: ASTM A403/A403M-19a - Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
• Effective Date: 01-Nov-2019
• Refers: ASTM A126-04(2019) - Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings
• Effective Date: 01-Nov-2019
• Refers: ASTM A106/A106M-19a - Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
• Effective Date: 01-Nov-2019
• Refers: ASTM D4894-19 - Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
• Effective Date: 01-May-2019

Overview

ASTM F1545-15a(2021) is the authoritative international standard specifying the requirements for factory-made plastic-lined ferrous metal pipe, fittings, and flanges intended primarily for conveying corrosive fluids. Developed and published by ASTM International, this specification ensures that lined piping components meet rigorous requirements for materials, mechanical properties, design, and performance. The standard is widely referenced by engineers, manufacturers, and end users in industries where chemical resistance and mechanical reliability are critical.

This document covers various aspects including resin liner materials, dimensions, working pressure and temperature limitations, flange construction, venting, workmanship, marking, quality assurance, and testing procedures such as hydrostatic, vacuum, high- and low-temperature, and steam-cold water cycling tests.

Key Topics

• Material Requirements: Specifies the use of high-performance plastic resins such as PTFE, FEP, PFA, ETFE, PVDF, PP, and HDPE as liner materials. The standard outlines mechanical and physical property requirements for these materials.
• Design and Dimensions: Covers dimensions and tolerances for lined pipes, fittings, and flanges, ensuring compatibility with industry flange standards such as ASME B16.1, B16.5, and B16.42.
• Performance Testing: Details extensive testing to verify product reliability, including:
  • High-temperature and low-temperature cycling
  • Steam-cold water cycling for thermal shock resistance
  • Hydrostatic pressure testing for leak integrity
  • Vacuum testing to assess liner adhesion and collapse resistance
  • Electrostatic testing to detect liner defects
• Workmanship and Quality Assurance: Specifies that linings must be free from defects such as pinholes or cracks, and requires visual inspections and quality assurance protocols.
• Marking and Packaging: Requires robust marking for product identification and proper packaging to protect flanged faces during shipping and storage.

Applications

Plastic-lined ferrous metal piping systems specified under ASTM F1545-15a(2021) are essential in industries that demand both mechanical strength and chemical resistance. Common applications include:

• Chemical processing plants: Safe transfer of acids, alkalis, and aggressive solvents
• Water and wastewater treatment facilities: Handling of corrosive or contaminated fluids
• Pharmaceutical and food industries: Piping systems where contamination is a concern and inert materials are vital
• Mining and mineral processing: Conveyance of abrasive and corrosive slurries
• Power generation: Transporting chemicals for water treatment or emissions controls

By ensuring high integrity of lined pipes and fittings, compliance with ASTM F1545-15a(2021) helps prevent leaks, environmental contamination, and premature equipment failure.

Related Standards

Several key standards are referenced within ASTM F1545-15a(2021) to support compliance and compatibility in piping systems, such as:

• ASME B16.5: Steel Pipe Flanges and Flanged Fittings
• ASME B16.1 and B16.42: Flanges for cast and ductile iron applications
• ASTM A53/A53M, A106/A106M, A105/A105M, A182/A182M: Specifications for base ferrous metals
• ASTM D4101, D3222, D3307, D3159, D3350: Specifications for polypropylene, PVDF, PFA, ETFE, and HDPE resins
• MSS SP-43: Stainless Steel Butt-Welding Fittings

Users should also consult the manufacturer’s chemical resistance data to determine the suitability of specific liner materials in various operating environments.

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Adhering to ASTM F1545-15a(2021) ensures the safety, durability, and regulatory compliance of plastic-lined ferrous metal piping systems, supporting high-performance fluid handling in aggressive service conditions. For further technical or purchasing information, refer to the full standard or consult with qualified suppliers.

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:F1545 −15a (Reapproved 2021) An American National Standard
Standard Specification for
Plastic-Lined Ferrous Metal Pipe, Fittings, and Flanges
This standard is issued under the fixed designation F1545; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This specification covers factory-made plastic-lined fer-
responsibility of the user of this standard to establish appro-
rous metal pipe, fittings, and flanges intended primarily for
priate safety, health, and environmental practices and deter-
conveying corrosive fluids. Requirements for materials,
mine the applicability of regulatory limitations prior to use.
workmanship, dimensions, design, fabrication, working pres-
1.6 This international standard was developed in accor-
sure and temperatures, test methods, qualification
dance with internationally recognized principles on standard-
requirements, and markings are included.
ization established in the Decision on Principles for the
1.1.1 This specification does not define the suitability of
Development of International Standards, Guides and Recom-
different liner materials to various chemical and operating
mendations issued by the World Trade Organization Technical
environments. Refer to the manufacturer’s chemical resistance
Barriers to Trade (TBT) Committee.
data for suitability recommendations.
1.1.2 This specification does not include products coated
2. Referenced Documents
with plastics.
2.1 ASTM Standards:
1.2 This specification covers plastic-lined pipe, flanges, and
A48/A48MSpecification for Gray Iron Castings
fittings as listed in Table 1. Pressure limitations shall be in
A53/A53MSpecification for Pipe, Steel, Black and Hot-
accordance with ASME B16 Standards, except reduced pres-
Dipped, Zinc-Coated, Welded and Seamless
sure limitations may be established by the manufacturer,
A105/A105MSpecification for Carbon Steel Forgings for
considering both pressure and temperature limitations of the
Piping Applications
ferrous metal housing and the sealing ability of the liner.
A106/A106MSpecification for Seamless Carbon Steel Pipe
NOTE 1—In this specification, propylene plastics cover those materials
for High-Temperature Service
defined as both polypropylene plastics and propylene plastics in Termi-
A126Specification for Gray Iron Castings for Valves,
nology F412. Both materials are identified as “PP” on the product. Note
Flanges, and Pipe Fittings
that this is at variance with Terminology D1600, where “PP” is the
A135/A135MSpecification for Electric-Resistance-Welded
abbreviation for polypropylene.
Steel Pipe
1.3 The plastic-lined flanged pipe and fitting assemblies are
A182/A182MSpecification for Forged or Rolled Alloy and
limited to temperatures shown in Table 2. End users should
Stainless Steel Pipe Flanges, Forged Fittings, and Valves
consult with manufacturers as to the likely result of using a
and Parts for High-Temperature Service
particular lined piping component at temperatures below the
A216/A216MSpecificationforSteelCastings,Carbon,Suit-
rated minimum.
able for Fusion Welding, for High-Temperature Service
NOTE 2—The temperature limitations are based on noncorrosive test
A234/A234MSpecification for Piping Fittings of Wrought
conditions.Useinspecificaggressiveenvironmentsmayaltertemperature
Carbon Steel and Alloy Steel for Moderate and High
limitations. In such instances, specific temperature limits shall be estab-
Temperature Service
lished by mutual agreement between the purchaser and the manufacturer.
A278/A278M Specification for Gray Iron Castings for
1.4 Thevaluesstatedininch-poundunitsaretoberegarded
Pressure-Containing Parts for Temperatures Up to 650°F
as standard. The values given in parentheses are mathematical
(350°C)
conversions to SI units that are provided for information only
A312/A312M Specification for Seamless, Welded, and
and are not considered standard.
Heavily Cold Worked Austenitic Stainless Steel Pipes
A351/A351MSpecification for Castings, Austenitic, for
This specification is under the jurisdiction ofASTM Committee F17 on Plastic
Piping Systems and is the direct responsibility of Subcommittee F17.11 on
Composite. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved July 1, 2021. Published October 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1995. Last previous edition approved in 2015 as F1545–15a. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F1545–15AR21. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1545−15a (2021)
Pressure-Containing Parts 2.3 Manufacturers Standardization Society (MSS) Standard:
A395/A395M Specification for Ferritic Ductile Iron MSS SP-43Wrought Stainless Steel Butt-Welding Fittings
Pressure-RetainingCastingsforUseatElevatedTempera-
3. Terminology
tures
A403/A403MSpecificationforWroughtAusteniticStainless 3.1 General—The definitions used are in accordance with
Terminologies F412 and D1600, unless otherwise indicated.
Steel Piping Fittings
A513/A513MSpecification for Electric-Resistance-Welded
4. Materials
Carbon and Alloy Steel Mechanical Tubing
4.1 Lining:
A536Specification for Ductile Iron Castings
4.1.1 Material—The lining shall be made from a resin
A587Specification for Electric-Resistance-Welded Low-
conforming to one of the requirements in Table 3.
Carbon Steel Pipe for the Chemical Industry
4.1.2 Mechanical Properties—The minimum tensile
D729Specification for Vinylidene Chloride Molding Com-
strength and minimum elongation at break when tested in
pounds (Withdrawn 2000)
accordance with the specifications outlined in 4.1.1 shall
D792Test Methods for Density and Specific Gravity (Rela-
conformtoTable4,exceptthetestspecimensshallbeobtained
tive Density) of Plastics by Displacement
from extruded or molded liners. Sample orientation is not
D1457 Specification for Polytetrafluoroethylene (PTFE)
critical except for PTFE liners made using the paste extrusion
Molding and Extrusion Materials (Withdrawn 1996)
process. For paste-extruded PTFE liners, test specimens with
D1505Test Method for Density of Plastics by the Density-
their major axis cut longitudinally shall meet the mechanical
Gradient Technique
property criteria listed in Table 4, and specimens cut circum-
D1600TerminologyforAbbreviatedTermsRelatingtoPlas-
ferentially shall have a minimum tensile strength at break of
tics
2500 psi (17.3 MPa) and a minimum elongation of 200%.
D2116Specification for FEP Resin Molding and Extrusion
4.1.3 Specific Gravity—Specific gravity for polytetrafluoro-
Materials
ethylene (PTFE) resins, when tested in accordance with Test
D3159Specification for Modified ETFE Fluoropolymer
Methods D792 or D1505, shall be as follows:
Molding and Extrusion Materials
Lining Material, Resin Type Specific Gravity
D3222Specification for Unmodified Poly(Vinylidene Fluo-
Polytetrafluoroethylene (PTFE) Types I and 2.14 to 2.19
ride) (PVDF) Molding Extrusion and Coating Materials
IV
D3307SpecificationforPerfluoroalkoxy(PFA)ResinMold-
Polytetrafluoroethylene (PTFE) Type III 2.13 to 2.21
ing and Extrusion Materials
4.2 Ferrous Pipe and Fittings:
D3350Specification for Polyethylene Plastics Pipe and Fit-
4.2.1 Mechanical Properties—Themechanicalpropertiesof
tings Materials
the pipes and fittings shall conform to the appropriate specifi-
D4101Classification System and Basis for Specification for
cations listed in Table 5, except as they are influenced by
Polypropylene Injection and Extrusion Materials
accepted methods of processing in the industry (for example,
D4894 Specification for Polytetrafluoroethylene (PTFE)
Van Stone flaring, bending, swaging, welding, and threading).
Granular Molding and Ram Extrusion Materials
The carbon steel pipe and wrought fittings shall be welded or
D4895 Specification for Polytetrafluoroethylene (PTFE)
seamless steel, Schedule 40 or 80, except Schedule 30 pipe
Resin Produced From Dispersion
may be used in 8in., 10in., and 12in. nominal size. Schedule
D5575Classification System for Copolymers of Vinylidene
20 or standard wall may be used in nominal sizes 12 in. and
Fluoride (VDF) with Other Fluorinated Monomers larger.
4.2.2 Finish—The interior surfaces of all housings shall be
F412Terminology Relating to Plastic Piping Systems
F714Specification for Polyethylene (PE) Plastic Pipe (DR- clean and free of mold burrs, rust, scale, or other protrusions,
which may adversely affect the integrity or performance of the
PR) Based on Outside Diameter
lining.
2.2 ASME Standards:
4.2.3 General—Allpipeandfittingendconnectionsshallbe
B16.1 Cast Iron Pipe Flanges Flanged Fittings
manufacturedtoprovideaminimum ⁄8-in.radiusorchamferin
B16.5 Steel Pipe Flanges and Flanged Fittings
the transition from pipe wall to flange or lap face. This radius
B16.9 Factory-Made Wrought Steel Butt Welding Fittings
or chamfer is required to reduce stress concentrations in the
B16.28 Wrought Steel Buttwelding Short Radius Elbows
plasticlinerasitisflaredormoldedovertheflangefaceorstub
and Returns
end. A perforated metal collar which seats over the flange
B16.42 Ductile Iron Pipe Flanges and Flanged Fittings—
chamfer may be used to provide this required radius.
SectionIXoftheASMEBoilerandPressureVesselCode
4.2.4 Dimensional—Flanges and fittings used for plastic-
lined pipe shall conform dimensionally (Note 3) to the follow-
ing industry ferrous flange and fitting dimensional standards:
The last approved version of this historical standard is referenced on
www.astm.org.
4 5
Available from American Society of Mechanical Engineers (ASME), ASME AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
International Headquarters, Three Park Ave., New York, NY 10016-5990, http:// Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
www.asme.org. hq.com.
F1545−15a (2021)
5.3 Venting—Each lined pipe and fitting shall be provided
Metallurgy Specification
Steel ASME B16.5
with a venting system that will release any annular pressure
Ductile iron ASME B16.42
between the polymer liner and the host metallic component.
Cast iron ASME B16.1
NOTE 3—Center-to-face dimensions include the plastic lining. NOTE 5—One or more holes in the housing, or a helical groove system
inside the housing, that connects flange vents, has provided adequate
4.2.5 Welding—All metal welding shall be done by welders
venting.
or welding operators using welding procedures qualified under
NOTE 6—Venting is not required with PVDF, PP, ETFE, or PVDC
the provisions of the ASME Boiler and Pressure Vessel Code
liners.
(Section IX).
5.4 Workmanship:
5. Requirements
5.4.1 Pipe and fittings shall show no evidence of pinholes,
porosity, or cracks when inspected in accordance with 5.5.2.
5.1 Dimensions:
Theliningsshallfitsnuglyinsidethepipeandfittinghousings.
5.1.1 Housing—Housing installation dimensions are as re-
Any bulges or other obvious indications of poor contact with
quired in the applicable material specification in accordance
the housing shall be cause for rejection.
with 4.2.4.
5.1.2 Plastic Wall Thickness—Pipe and fitting liners shall 5.4.2 Thegasketseatingsurfaceoftheliningshallbefreeof
surface defects that could impair sealing effectiveness.
have a minimum wall thickness and face thickness in accor-
dance with Table 6. Scratches, dents, nicks, or tool marks on the seating surface
shall not be deeper than 10% of the face thickness, nor, across
5.1.3 Liner Flange Hub-or-Flare Diameter—The outside
diameter of the flare covering the gasket portion of the flange the full width of the hub’s plastic face.
or the full face of the lap-joint stub end shall not be less than
5.5 Performance:
the diameter specified in Table 7. The flared portion of the
5.5.1 Qualification—Lined pipe and fittings shall meet the
lining shall be concentric with the flared portion of the pipe
qualification requirements specified in 6.1, 6.2, 6.3 and 6.4
within ⁄16 in. (1.6 mm).Alternately, machined plastic stub-end
when tested. Qualification testing shall be conducted for each
hubs bonded to the installed plastic liner of the same material,
liner material including PTFE liner material formulation. Any
may be used with the metallic raised-face flange or lap-joint
changes to manufacturing or design of lined pipe and fittings
flange
which affect the fit between the liner and the housing (either
5.1.4 Tolerances—Tolerances for pipe, flanges, and fittings
pipe or fitting) shall be subjected to qualification testing as
shall be in accordance with Table 8. Bolt holes in both flanges
specified in 6.1, 6.2, 6.3 and 6.4.
on a fixed flange spool shall straddle the same center line to
facilitatealignment.Finishedlined(plasticflaretoplasticflare)
NOTE7—Qualificationtestingresultswillberetainedforauditpurposes
fabricated fittings shall conform to the nominal center-to-face for a period of time consistent with the manufacturer’s quality plan.
dimensions as specified in ASME B16.1, B16.42, or B16.5
5.5.2 Inspection—Each spool and fitting, prior to shipment,
with the applicable tolerances.
shallbehydrostaticallyorelectrostaticallytestedinaccordance
5.2 Flange Construction:
with Section 7 and shall subsequently be inspected visually to
5.2.1 Threaded flanges shall be secured in position to
verify conformance to the requirements of 5.4.
prevent inadvertent turning of the flange.
5.2.2 Socket-type flanges, except threaded, shall be fully
6. Test Methods
back-welded to the pipe housing and the inside surfaces of the
6.1 High-Temperature Test:
socket flanges shall be ground smooth.
6.1.1 Cycle representative production samples of lined pipe
5.2.3 Slip-on flanges shall be fully back-welded.
and fittings in an oven from room temperature to the test
NOTE 4—No welding shall be done on lined components in the field.
temperature of the liner type (Table 9) to determine the ability
5.2.4 Modified slip-on flanges used as lap-joint flanges may
of the lined components to withstand heat aging and tempera-
be used with flared laps formed by flaring the metallic pipe.
ture cycling.Test a minimum of two pipe spools, tees, and 90°
Thebackingflangefortheflaredmetalliclapshallhaveatleast
elbows in each size.
1 1
a ⁄8in. bevel or ⁄8in. corner radius at the bore to provide
6.1.2 Procedure—Installcompanionflangesatthemanufac-
clearanceforthefilletoftheflaredlap.Theoutsidediameterof
turer’srecommendedtorquevalue,andaffixathermocouplein
the flared lap shall be in accordance with the dimension of an
the ferrous housing to measure the temperature. Pipe spools
ASME B16.9 lap-joint stub end.
shall be at least 3 ft (1 m) long.After3hinan oven at the test
5.2.5 Lap-joint (or Van Stone) flanged ends may be manu-
temperature (Table 9) as indicated by the thermocouple, air
factured by standard forming techniques or by using fully
coolthelinedcomponentsto122°F(50°C)maximum.Repeat
welded Type A MSS SP-43 or ASME B16.9 lap-joint stub
this test for a total of three cycles.
ends.VanStoneflaresshallhaveafilletradiuscompatiblewith
6.1.3 Inspection—Inspect lined pipe and fittings after each
thecornerradiusofthematingflangeandshallnotcontainany
cyclefordistortionorcracksinthelining.Atthecompletionof
cracks or buckles. Van Stone flares and stub ends shall have a
the third cycle, subject tested specimens to the hydrostatic or
radius to provide a smooth transition for the plastic flare. Only
electrostatic test described in Section 7.
lap joint flanges in accordance withASME B16.42 and B16.5
shall be used. 6.2 Low-Temperature Test:
F1545−15a (2021)
NOTE9—Vacuumtemperatureratingsforpipeandfittingsarepublished
6.2.1 After the high-temperature test, subject the same parts
in the manufacturer’s literature.
used for 6.1 to a cold test at 0°F (−18°C) for a minimum of
NOTE 10—The vacuum test is performed on pipe and fittings that have
48 h. New parts may also be used.
not been exposed to prior service. Use in specific environments may alter
6.2.2 Procedure—Installcompanionflangesatthemanufac-
the vacuum-temperature ratings.
turer’srecommendedtorquevalue,andaffixathermocoupleto
6.4.2 Procedure—For pipe spools, specimen lengths shall
the ferrous housing to measure the temperature. Pipe spools
be at least 10 pipe diameters. Install a flange incorporating a
shall be at least 3 ft (1 m) long. After 48 h at or below 0°F
sight glass at one end and a flange suitable for drawing a
(−18°C), as indicated by the thermocouple, allow the parts to
vacuum at the other end. Affix a thermocouple to the ferrous
warm to a minimum of 60°F (16°C).
housing to measure the temperature. Heat the specimens
6.2.3 Inspection—Ins
...