ASTM F438-23

Standard Specification for Socket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 40

ABSTRACT
This specification covers chlorinated poly(vinyl chloride) (CPVC) Schedule 40 socket-type pipe fittings intended for use with Iron Pipe Size (IPS) outside-diameter plastic pipe in the distribution of pressurized liquids only, which are chemically compatible with the piping materials. Fittings covered by this specification are normally molded. In-line fittings, such as couplings, unions, bushings, caps, nipples, and the like, shall be molded or machined from extruded stock. Fittings fabricated by backwelding are not included in this specification. The pipe fittings shall be subject to a burst pressure test.
SCOPE
1.1 This specification covers chlorinated poly(vinyl chloride) (CPVC) Schedule 40 socket-type pipe fittings. Included are requirements for materials, workmanship, dimensions, and burst pressure.  
Note 1: The CPVC fittings covered by this standard were covered previously in Specification D2466.  
1.2 The products covered by this specification are intended for use with the distribution of pressurized liquids only, which are chemically compatible with the piping materials. Due to inherent hazards associated with testing components and systems with compressed air or other compressed gases, some manufacturers do not allow pneumatic testing of their products. Consult with specific product/component manufacturers for their specific testing procedures prior to pneumatic testing.
Note 2: Pressurized (compressed) air or other compressed gases contain large amounts of stored energy, which present serious safety hazards should a system fail for any reason.  
1.3 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
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 The following safety hazards caveat pertains only to the test method portion, Section 8, of this 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.  
1.6 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: 31-Mar-2023
• ICS: 23.040.45 - Plastics fittings
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.10 - Fittings

Relations

• Refers: ASTM F412-20 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Apr-2020
• Refers: ASTM D1784-20 - Standard Classification System and Basis for Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds
• Effective Date: 15-Jan-2020
• Refers: ASTM F412-19 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Jan-2019
• Refers: ASTM D1599-18 - Standard Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
• Effective Date: 01-Sep-2018
• Refers: ASTM D1600-18 - Standard Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
• Effective Date: 01-Jan-2018
• Refers: ASTM F412-17a - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Aug-2017
• Refers: ASTM F412-17 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Feb-2017
• Refers: ASTM F412-16a - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 15-Nov-2016
• Refers: ASTM F412-16 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Aug-2016
• Refers: ASTM F412-15 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Jun-2015
• Refers: ASTM D2122-15 - Standard Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
• Effective Date: 15-Mar-2015
• Refers: ASTM D2466-15 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40
• Effective Date: 01-Mar-2015
• Refers: ASTM D1599-14 - Standard Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
• Effective Date: 15-Apr-2014
• Refers: ASTM D1600-14 - Standard Terminology for Abbreviated Terms Relating to Plastics
• Effective Date: 01-Feb-2014
• Refers: ASTM D2466-13 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40
• Effective Date: 01-Aug-2013

Overview

ASTM F438-23: Standard Specification for Socket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 40 sets the requirements for socket-type CPVC pipe fittings designed for use with Iron Pipe Size (IPS) plastic pipes, specifically for the distribution of pressurized liquids. Developed by ASTM International, this specification ensures quality and performance for CPVC Schedule 40 fittings, covering aspects such as material requirements, workmanship, dimensions, pressure performance, and marking.

These CPVC fittings-generally used in water supply systems and industrial liquid distribution-must be chemically compatible with the pipe materials. The standard excludes fittings made by backwelding and is not applicable to fittings for venting combustion gases.

Key Topics

• Material Requirements: All fittings must be made from certified CPVC compounds compliant with ASTM D1784, ensuring durability, heat resistance, and chemical stability.
• Design and Manufacture:
  • Fittings are typically molded, with certain in-line types permitted to be machined from extruded stock.
  • Prohibits use of fittings fabricated by backwelding.
• Dimensions and Tolerances:
  • Precise dimensional requirements for socket diameters, wall thickness, angular variation, and tolerances for reducing bushings.
  • Minimum wall thickness standards enhance safety and reliability.
• Pressure Performance:
  • Fittings must pass a rigorous burst pressure test in accordance with ASTM D1599, confirming their integrity under specified conditions.
  • Pressure ratings refer specifically to quality assurance; working pressures should be determined by system requirements.
• Testing and Conditioning:
  • Includes requirements for environmental conditioning prior to testing.
  • Sampling and testing procedures must be agreed upon between buyer and seller.
• Marking and Identification:
  • Every fitting must be permanently marked with manufacturer information, material designation (CPVC 23447), size, certification marks, and the standard designation (F438).
  • Special consideration is given for small fittings where complete marking is impractical.

Safety caveats within the standard emphasize the importance of not using compressed air for testing due to potential hazards.

Applications

The primary applications for Schedule 40 CPVC socket-type fittings as specified by ASTM F438-23 include:

• Potable Water Distribution: Used in residential, commercial, and municipal water supply systems where chemical compatibility and performance are critical.
• Industrial Liquid Transport: Suitable for industrial piping systems carrying pressurized liquids compatible with CPVC.
• Irrigation and Agricultural Uses: Effective in irrigation systems where pressurized water or compatible fluids are distributed.
• Maintenance and Repair: Guides quality for replacement fittings in existing CPVC piping systems.

For all installations, it is crucial to ensure that only liquids chemically compatible with CPVC are conveyed. When intended for potable water systems, compliance with NSF/ANSI standards for drinking water components is applicable.

Related Standards

ASTM F438-23 references and aligns with several key standards and specifications, ensuring consistency across materials and testing in plastic piping systems:

• ASTM D1784: Classification for rigid PVC and CPVC compounds
• ASTM D1599: Test method for short-time hydraulic pressure
• ASTM D2122: Testing pipe and fitting dimensions
• ASTM F1498: Specification for taper pipe threads for thermoplastics
• ASTM D2466: Specification for PVC plastic pipe fittings, Schedule 40
• NSF/ANSI 14 and 61: Certification for plastic piping components and health effects for drinking water components

Other referenced standards include marking guidelines for military and civil uses (MIL-STD-129, Fed. Std. No. 123).

Practical Value

Adhering to ASTM F438-23 helps manufacturers, engineers, and contractors ensure the safety, reliability, and regulatory compliance of CPVC Schedule 40 socket-type pipe fittings in pressurized liquid systems. The standard fosters high-quality installations, supports code compliance, and mitigates risk through rigorous material and performance criteria.

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: F438 − 23 An American National Standard
Standard Specification for
Socket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic
Pipe Fittings, Schedule 40
This standard is issued under the fixed designation F438; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This specification covers chlorinated poly(vinyl chlo-
mendations issued by the World Trade Organization Technical
ride) (CPVC) Schedule 40 socket-type pipe fittings. Included
Barriers to Trade (TBT) Committee.
are requirements for materials, workmanship, dimensions, and
burst pressure.
2. Referenced Documents
NOTE 1—The CPVC fittings covered by this standard were covered
2.1 ASTM Standards:
previously in Specification D2466.
D618 Practice for Conditioning Plastics for Testing
1.2 The products covered by this specification are intended
D1599 Test Method for Resistance to Short-Time Hydraulic
for use with the distribution of pressurized liquids only, which
Pressure of Plastic Pipe, Tubing, and Fittings
are chemically compatible with the piping materials. Due to
D1600 Terminology for Abbreviated Terms Relating to Plas-
inherent hazards associated with testing components and sys-
tics
tems with compressed air or other compressed gases, some
D1784 Classification System and Basis for Specification for
manufacturers do not allow pneumatic testing of their products.
Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlo-
Consult with specific product/component manufacturers for
rinated Poly(Vinyl Chloride) (CPVC) Compounds
their specific testing procedures prior to pneumatic testing.
D2122 Test Method for Determining Dimensions of Ther-
NOTE 2—Pressurized (compressed) air or other compressed gases
moplastic Pipe and Fittings
contain large amounts of stored energy, which present serious safety
D2466 Specification for Poly(Vinyl Chloride) (PVC) Plastic
hazards should a system fail for any reason.
Pipe Fittings, Schedule 40
1.3 The text of this specification references notes, footnotes,
D2749 Symbols for Dimensions of Plastic Pipe Fittings
and appendixes which provide explanatory material. These
F412 Terminology Relating to Plastic Piping Systems
notes and footnotes (excluding those in tables and figures) shall
F1498 Specification for Taper Pipe Threads 60° for Thermo-
not be considered as requirements of the specification.
plastic Pipe and Fittings
1.4 The values stated in inch-pound units are to be regarded
2.2 Federal Standard:
as standard. The values given in parentheses are mathematical
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
conversions to SI units that are provided for information only
2.3 Military Standard:
and are not considered standard.
MIL-STD-129 Marking for Shipment and Storage
1.5 The following safety hazards caveat pertains only to the
2.4 NSF Standard:
test method portion, Section 8, of this specification: This
Standard No. 14 for Plastic Piping Components and Related
standard does not purport to address all of the safety concerns,
Materials
if any, associated with its use. It is the responsibility of the user
Standard No. 61 for Drinking Water Systems Components—
of this standard to establish appropriate safety, health, and
Health Effects
environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 This international standard was developed in accor-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
dance with internationally recognized principles on standard-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
This specification is under the jurisdiction of ASTM Committee F17 on Plastic the ASTM website.
Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings. DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA
Current edition approved April 1, 2023. Published July 2023. Originally 19111-5094 http://quicksearch.dla.mil/
approved in 1974. Last previous edition approved in 2017 as F438 – 17. DOI: Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann
10.1520/F0438-23. Arbor, MI 48113-0140, http://www.nsf.org.
*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
F438 − 23
3. Terminology male thread shall have an internal diameter not larger than
Schedule 80 pipe of the same size.
3.1 Definitions:
6.1.6 Minimum dimensions have zero negative tolerance.
3.1.1 Definitions are in accordance with Terminology F412
Tolerances on other dimensions are shown in Table 1 and Table
and abbreviations are in accordance with Terminology D1600,
3.
unless otherwise indicated. The abbreviation for chlorinated
poly(vinyl chloride) is CPVC. 6.2 Threads—For all fittings having taper pipe threads,
threads shall conform to Specification F1498 and be gaged in
4. Classification
accordance with 8.4.
4.1 General—This specification covers Schedule 40 CPVC
6.3 Burst Pressure:
pipe fittings, socket-type, intended for use with Iron Pipe Size
6.3.1 The minimum burst strength of the fittings shall be not
(IPS) outside-diameter plastic pipe.
less than that calculated for the size and wall thickness of the
4.1.1 Fittings covered by this specification are normally
pipe with which it is to be used, when calculated from the
molded. In-line fittings, such as couplings, unions, bushings,
following equation:
caps, nipples, and the like, shall be molded or machined from
S 5 P D 2 t /2t
~ !
O
extruded stock.
where:
4.1.2 Fittings fabricated by backwelding are not included in
this specification.
S = hoop stress, psi (or MPa),
P = internal pressure, psi (or MPa),
NOTE 3—This specification does not include requirements for pipe and
D = average outside diameter, in. (or mm), and
O
fittings intended to be used to vent combustion gases.
t = minimum wall thickness, in. (or mm).
5. Materials and Manufacture
Fittings tested in accordance with 8.5 shall withstand the
minimum burst pressure shown in Table 4.
5.1 This specification covers CPVC pipe fittings made from
6.3.2 Pressures shown are minimum burst pressures and do
compounds meeting the requirements of Class 23447 as
not imply rated working pressures. The burst pressure shall be
defined in Classification D1784.
used only as an indication of quality.
NOTE 4—Mechanical strength, heat resistance, flammability, and
chemical resistance requirements are covered in Classification D1784.
7. Workmanship, Finish, and Appearance
5.2 Rework Material—The manufacturers shall use only
7.1 The fittings shall be homogeneous throughout and free
their own clean rework fitting material and the fittings pro-
of cracks, holes, foreign inclusions, or other defects. The
duced shall meet all the requirements of this specification.
fittings shall be as uniform as commercially practicable in
color, opacity, density, and other physical properties.
6. Requirements
6.1 Dimensions and Tolerances: 8. Test Methods
6.1.1 Fitting sockets, inside diameters (waterways), mini-
8.1 Conditioning—Condition the test specimens at 73 °F 6
mum wall thicknesses, and dimensions shall be as shown in
4 °F (23 °C 6 2 °C) and 50 6 10 % relative humidity for not
Tables 1-4 and when measured in accordance with Test Method
less than 40 h prior to test in accordance with Procedure A of
D2122.
Practice D618, for those tests where conditioning is required.
6.1.2 When multistep reducer bushings are cored out, the
8.2 Test Conditions—Conduct tests in the Standard Labora-
inner socket shall be reinforced from the outer wall by a
tory Atmosphere of 73 °F 6 4 °F (23 °C 6 2 °C) and 50 6
minimum of three ribs extending from the top of the inner
10 % relative humidity, unless otherwise specified in the test
socket in the deepest extremity of the coring. The transition
methods or in this specification.
from D to DJ (Table 3) shall be straight, tapered as shown, or
radiused. A positive taper in the same direction of the taper in 8.3 Sampling—A sufficient quantity of fittings as agreed
the socket on the outside diameter of the bushing is optional.
upon between the seller and the purchaser shall be selected at
6.1.3 The maximum angular variation of any opening shall random from each lot or shipment and tested to determine that
be not more than ⁄2 ° off the true centerline axis.
the basic design is in conformance with this specification.
6.1.4 The minimum wall thickness of fittings shall be 125 %
NOTE 5—For individual orders or specifications where supplemental
of the minimum wall thickness of the corresponding size of
tests are required, only those tests and numbers of tests specifically agreed
Schedule 40 pipe for which they are designed to be used,
upon between the purchaser and the seller need be conducted.
except that for the socket, the wall thickness shall be at least
8.4 Threads—All taper pipe threads shall be gaged in
equal to the minimum wall thickness of the corresponding size
accordance with Specification F1498.
of Schedule 40 pipe. For any threaded transition fitting, the
8.5 Burst Pressure—Determine the minimum burst pressure
minimum wall thickness of the threaded portion shall be at
in accordance with Test Method D1599, Procedure B. The
least equal to the thickness of material under the thread root of
pressure shall be applied at a uniform rate such that the
threaded Schedule 80 pipe of the same size.
minimum allowable burst pressure is attained in 60 and 70 s.
6.1.5 The minimum inside diameter of the fittings shall be
not less than the minimum specified inside diameter of the
NOTE 6—Provided the minimum burst pressure is met or exceeded
corresponding size of Schedule 40 pipe. Any fitting having a between 60 and 70 s, the time-to-failure may exceed 70 s.
F438 − 23
A
TABLE 1 Tapered Sockets for CPVC Pipe Fittings, Schedule 40, in. (mm)
A B Wall Thickness, min Entrance, min
C
D
B Outside
C
Socket Entrance Diameter Socket Bottom Diameter
Nominal
Inside
Socket Diameter
Pipe Diameter,
Tolerance Maximum Tolerance Maximum
min
of Hub,
Diameter Diameter E F EW EX, EZ
min
Size
on Diameter Out-of-Round on Diameter Out-of-Round in. (mm)
M, min
in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm)
in. (mm) in. (mm) in. (mm) in. (mm)
1 1 1
⁄4 0.552 (14.02) ±0.004 (0.10) 0.016 (0.41) 0.536 (13.6) ±0.004 (0.10) 0.016 (0.41) 0.500 (12.70) 0.320 (8.13) 0.088 (2.23) 0.110 (2.79) 0.672 ⁄64 (0.40) ⁄64 (0.40)
3 1 1
⁄8 0.687 (17.45) ±0.004 (0.10) 0.016 (0.41) 0.671 (17.04) ±0.004 (0.10) 0.016 (0.41) 0.594 (15.
...

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: F438 − 17 F438 − 23 An American National Standard
Standard Specification for
Socket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic
Pipe Fittings, Schedule 40
This standard is issued under the fixed designation F438; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers chlorinated poly(vinyl chloride) (CPVC) Schedule 40 socket-type pipe fittings. Included are
requirements for materials, workmanship, dimensions, and burst pressure.
NOTE 1—The CPVC fittings covered by this standard were covered previously in Specification D2466.
1.2 The products covered by this specification are intended for use with the distribution of pressurized liquids only, which are
chemically compatible with the piping materials. Due to inherent hazards associated with testing components and systems with
compressed air or other compressed gases, some manufacturers do not allow pneumatic testing of their products. Consult with
specific product/component manufacturers for their specific testing procedures prior to pneumatic testing.
NOTE 2—Pressurized (compressed) air or other compressed gases contain large amounts of stored energy, which present serious safety hazards should
a system fail for any reason.
1.3 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and
footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
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 The following safety hazards caveat pertains only to the test method portion, Section 8, of this 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.
1.6 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.
2. Referenced Documents
2.1 ASTM Standards:
This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.
Current edition approved Aug. 1, 2017April 1, 2023. Published August 2017July 2023. Originally approved in 1974. Last previous edition approved in 20152017 as
F438 – 15.F438 – 17. DOI: 10.1520/F0438-17.10.1520/F0438-23.
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.
*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
F438 − 23
D618 Practice for Conditioning Plastics for Testing
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1784 Classification System and Basis for Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated
Poly(Vinyl Chloride) (CPVC) Compounds
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
D2466 Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40
D2749 Symbols for Dimensions of Plastic Pipe Fittings
F412 Terminology Relating to Plastic Piping Systems
F1498 Specification for Taper Pipe Threads 60° for Thermoplastic Pipe and Fittings
2.2 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
2.3 Military Standard:
MIL-STD-129 Marking for Shipment and Storage
2.4 NSF Standard:
Standard No. 14 for Plastic Piping Components and Related Materials
Standard No. 61 for Drinking Water Systems Components—Health Effects
3. Terminology
3.1 Definitions:
3.1.1 Definitions are in accordance with Terminology F412 and abbreviations are in accordance with Terminology D1600, unless
otherwise indicated. The abbreviation for chlorinated poly(vinyl chloride) is CPVC.
4. Classification
4.1 General—This specification covers Schedule 40 CPVC pipe fittings, socket-type, intended for use with Iron Pipe Size (IPS)
outside-diameter plastic pipe.
4.1.1 Fittings covered by this specification are normally molded. In-line fittings, such as couplings, unions, bushings, caps, nipples,
and the like, shall be molded or machined from extruded stock.
4.1.2 Fittings fabricated by backwelding are not included in this specification.
NOTE 3—This specification does not include requirements for pipe and fittings intended to be used to vent combustion gases.
5. Materials and Manufacture
5.1 This specification covers CPVC pipe fittings made from compounds meeting the requirements of Class 23447 as defined in
SpecificationClassification D1784.
NOTE 4—Mechanical strength, heat resistance, flammability, and chemical resistance requirements are covered in SpecificationClassification D1784.
5.2 Rework Material—The manufacturers shall use only their own clean rework fitting material and the fittings produced shall
meet all the requirements of this specification.
6. Requirements
6.1 Dimensions and Tolerances:
6.1.1 Fitting sockets, inside diameters (waterways), minimum wall thicknesses, and dimensions shall be as shown in Tables 1-4
and when measured in accordance with Test Method D2122.
DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA 19111-5094 http://quicksearch.dla.mil/
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, http://www.nsf.org.
F438 − 23
A
TABLE 1 Tapered Sockets for CPVC Pipe Fittings, Schedule 40, in. (mm)
A B Wall Thickness, min Entrance, min
C
B D
Outside
C
Socket Entrance Diameter Socket Bottom Diameter
Nominal
Inside
Diameter
Socket
Pipe Diameter,
Tolerance Maximum Tolerance Maximum
min
of Hub,
Diameter Diameter E F EW EX,EZ
min
Size
on Diameter Out-of-Round on Diameter Out-of-Round in. (mm)
M, min
in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm)
in. (mm) in. (mm) in. (mm) in. (mm)
1 1 1
⁄4 0.552 (14.02) ±0.004 (0.10) 0.016 (0.41) 0.536 (13.6) ±0.004 (0.10) 0.016 (0.41) 0.500 (12.70) 0.320 (8.13) 0.088 (2.23) 0.110 (2.79) 0.672 ⁄64 (0.40) ⁄64 (0.40)
3 1 1
⁄8 0.687 (17.45) ±0.004 (0.10) 0.016 (0.41) 0.671 (17.04) ±0.004 (0.10) 0.016 (0.41) 0.594 (15.08) 0.449 (11.40) 0.091 (2.31) 0.114 (2.90) 0.821 ⁄32 (0.79) ⁄32 (0.79)
1 1 1
⁄2 0.848 (21.54) ±0.004 (0.10) 0.016 (0.41) 0.836 (21.23) ±0.004 (0.10) 0.016 (0.41) 0.688 (17.48) 0.578 (14.68) 0.109 (2.76) 0.136 (3.45) 0.998 ⁄32 (0.79) ⁄32 (0.79)
3 1 1
⁄4 1.058 (26.87) ±0.004 (0.10) 0.020 (0.51) 1.046 (26.57) ±0.004 (0.10) 0.020 (0.51) 0.719 (18.26) 0.740 (18.80) 0.113 (2.87) 0.141 (3.58) 1.221 ⁄32 (0.79) ⁄32 (0.79)
1 1
1 1.325 (33.66) ±0.005 (0.13) 0.020 (0.51) 1.310 (33.27) ±0.005 (0.13) 0.020 (0.51) 0.875 (22.23) 0.990 (25.15) 0.133 (3.38) 0.166 (4.22) 1.504 ⁄16 (1.59) ⁄16 (1.59)
1 1 1
1 ⁄4 1.670 (42.42) ±0.005 (0.13) 0.024 (0.61) 1.655 (42.04) ±0.005 (0.13) 0.024 (0.61) 0.938 (23.83) 1.335 (33.91) 0.140 (3.56) 0.175 (4.45) 1.871 ⁄16 (1.59) ⁄16 (1.59)
1 1 1
1 ⁄2 1.912 (48.56) ±0.006 (0.15) 0.024 (0.61) 1.894 (48.10) ±0.006 (0.15) 0.024 (0.61) 1.094 (27.79) 1.564 (39.73) 0.145 (3.68) 0.181 (4.60) 2.127 ⁄16 (1.59) ⁄16 (1.59)
1 1
2 2.387 (60.63) ±0.006 (0.15) 0.024 (0.61) 2.369 (60.17) ±0.006 (0.15) 0.024 (0.61) 1.156 (29.36) 2.021 (51.33) 0.154 (3.91) 0.193 (4.90) 2.634 ⁄16 (1.59) ⁄16 (1.59)
1 3 1
2 ⁄2 2.889 (73.38) ±0.007 (0.18) 0.030 (0.76) 2.868 (72.85) ±0.007 (0.18) 0.030 (0.76) 1.750 (44.45) 2.414 (61.32) 0.203 (5.16) 0.254 (6.45) 3.170 ⁄32 (2.38) ⁄8 (3.18)
3 1
3 3.516 (89.31) ±0.008 (0.20) 0.030 (0.76) 3.492 (88.70) ±0.008 (0.20) 0.030 (0.76) 1.875 (47.63) 3.008 (76.40) 0.216 (5.49) 0.270 (6.86) 3.841 ⁄32 (2.38) ⁄8 (3.18)
1 3 1
3 ⁄2 4.016 (102.01) ±0.008 (0.20) 0.030 (0.76) 3.992 (101.40) ±0.008 (0.20) 0.030 (0.76) 2.000 (50.80) 3.486 (88.54) 0.226 (5.74) 0.283 (7.19) 4.374 ⁄32 (2.38) ⁄8 (3.18)
3 1
4 4.518 (114.76) ±0.009 (0.23) 0.030 (0.76) 4.491 (114.07) ±0.009 (0.23) 0.030 (0.76) 2.000 (50.80) 3.961 (100.61) 0.237 (6.02) 0.296 (7.52) 4.907 ⁄32 (2.38) ⁄8 (3.18)
3 1
5 5.583 (141.81) ±0.010 (0.25) 0.060 (1.52) 5.553 (141.05) ±0.010 (0.25) 0.060 (1.52) 3.000 (76.20) 4.975 (126.37) 0.258 (6.55) 0.323 (8.20) 6.039 ⁄32 (2.38) ⁄8 (3.18)
1 3
6 6.647 (168.83) ±0.011 (0.28) 0.060 (1.52) 6.614 (168.00) ±0.011 (0.28) 0.060 (1.52) 3.000 (76.20) 5.986 (152.04) 0.280 (7.11) 0.350 (8.89) 7.203 ⁄8 (3.18) ⁄16 (4.76)
A
The sketches and designs of fittings are illustrative only.
B
Socket depth, measured from socket entrance face to socket bottom face.
C
See 6.1.5.
F438 − 23
TABLE 2 Minimum Dimension from Center to End of Sockets
(Laying Length) for Couplings, Tees, 90° and 45° Elbows, CPVC
A
Socket-Type Pipe Fittings, Schedule 40, in. (mm)
Nominal Pipe G, min J, min N, min
Size in. (mm) in. (mm) in. (mm)
1 5 5 1
⁄4 ⁄16 (7.94) ⁄32 (3.97) ⁄16 (1.59)
3 3 3 3
⁄8 ⁄8 (9.53) ⁄16 (4.76) ⁄32 (2.38)
1 1 1 3
⁄2 ⁄2 (12.70) ⁄4 (6.35) ⁄32 (2.38)
3 9 5 3
⁄4 ⁄16 (14.29) ⁄16 (7.94) ⁄32 (2.38)
11 5 3
1 ⁄16 (17.46) ⁄16 (7.94) ⁄32 (2.38)
1 7 3 3
1 ⁄4 ⁄8 (22.22) ⁄8 (9.53) ⁄32 (2.38)
1 7 3
1 ⁄2 1 (25.40) ⁄16 (11.11) ⁄32 (2.38)
1 5 3
2 1 ⁄4 (31.75) ⁄8 (15.88) ⁄32 (2.38)
1 1 11 3
2 ⁄2 1 ⁄2 (38.10) ⁄16 (17.46) ⁄16 (4.76)
13 3 3
3 1 ⁄16 (46.04) ⁄4 (19.05) ⁄16 (4.76)
1 1 3
3 ⁄2 2 ⁄8 (53.98) 1 (25.40) ⁄16 (4.76)
5 3
4 2 ⁄16 (58.74) 1 (25.40) ⁄16 (4.76)
3 3
5 3 (76.20) 1 ⁄8 (34.92) ⁄16 (4.76)
1 3 1
6 3 ⁄2 (88.90) 1 ⁄4 (44.45) ⁄4 (6.35)
A
The sketches and designs of fittings are illustrative only.
6.1.2 When multistep reducer bushings are cored out, the inner socket shall be reinforced from the outer wall by a minimum of
three ribs extending from the top of the inner socket in the deepest extremity of the coring. The transition from D to DJ (Table
3) shall be straight, tapered as shown, or radiused. A positive taper in the same direction of the taper in the socket on the outside
diameter of the bushing is optional.
6.1.3 The maximum angular variation of any opening shall be not more than ⁄2 ° off the true centerline axis.
6.1.4 The minimum wall thickness of fittings shall be 125 % of the minimum wall thickness of the corresponding size of Schedule
40 pipe for which they are designed to be
...