ASTM F439-24

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: F439 − 19 F439 − 24 An American National Standard
Standard Specification for
Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe
Fittings, Schedule 80
This standard is issued under the fixed designation F439; 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 80 pipe fittings. Included are requirements for
materials, workmanship, dimensions, and burst pressure.
NOTE 1—The threaded CPVC fittings covered by this specification were covered previously in Specification F437.
1.2 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 this specification.
1.3 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.
1.4 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.
1.5 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:
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 (Withdrawn 2024)
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
D2749 Symbols for Dimensions of Plastic Pipe Fittings
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, 2019April 1, 2024. Published October 2019April 2024. Originally approved in 1974. Last previous edition approved in 20132019 as
F439 – 13.F439 – 19. DOI: 10.1520/F0439-19.10.1520/F0439-24.
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 the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
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F439 − 24
F412 Terminology Relating to Plastic Piping Systems
F437 Specification for Threaded Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80
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 System Components—Health Effects
3. Terminology
3.1 Definitions—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 80 CPVC pipe fittings, 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 so forth, shall be molded or machined from extruded stock.
4.1.2 Fittings fabricated by back welding or butt fusion are not included in this specification.
NOTE 2—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 and Class 23448
as defined in Specification D1784.
NOTE 3—Mechanical strength, heat resistance and flammability requirements are covered in Specification 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 1-6
when measured in accordance with Test Method D2122.
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 to 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 (see XA/XB in Table 3). Any point measured along the outside diameter of the bushing
(between XA and XB) shall not fall below minimum pipe OD.
6.1.3 The minimum wall thickness of fittings shall be 125 % of the minimum wall thickness of the corresponding size of Schedule
80 pipe for which they are designed to be used, except that for the socket, the wall thickness shall be at least equal to the minimum
wall thickness of the corresponding size of Schedule 80 pipe.
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F439 − 24
A
TABLE 1 Tapered Sockets for CPVC Pipe Fittings, Schedule 80, in. (mm)
A B
B C
C D Wall Thickness, min Entrance, min
Socket Entrance Diameter Socket Bottom Diameter
Nominal
Pipe
Tolerance on Tolerance on
Maximum Maximum Socket Inside
Size
Diameter Nominal Diameter Nominal E F EW EX, EZ
Out-of-Round Out-of-Round Length, min Diameter, min
Diameter Diameter
⁄4 0.552 (14.02) ±0.004 (0.10) 0.016 (0.41) 0.536 (13.61) ±0.004 (0.10) 0.016 (0.41) 0.625 (15.88) 0.258 (6.55) 0.119 (3.02) 0.149 (3.78) 0.02 (0.5) 0.02 (0.5)
⁄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) 0.750 (19.05) 0.379 (9.63) 0.126 (3.20) 0.158 (4.01) 0.03 (0.8) 0.03 (0.8)
⁄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) 0.875 (22.22) 0.502 (12.75) 0.147 (3.73) 0.184 (4.67) 0.03 (0.8) 0.03 (0.8)
⁄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) 1.000 (25.40) 0.698 (17.73) 0.154 (3.91) 0.193 (4.90) 0.03 (0.8) 0.03 (0.8)
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) 1.125 (28.58) 0.910 (23.11) 0.179 (4.55) 0.224 (5.69) 0.06 (1.5) 0.06 (1.5)
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) 1.250 (31.75) 1.227 (31.17) 0.191 (4.85) 0.239 (6.07) 0.06 (1.5) 0.06 (1.5)
1 ⁄2 1.912 (48.56) ±0.006 (0.15) 0.024 (0.61) 1.894 (48.11) ±0.006 (0.15) 0.024 (0.61) 1.375 (34.93) 1.446 (36.73) 0.200 (5.08) 0.250 (6.35) 0.06 (1.5) 0.06 (1.5)
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) 1.500 (38.10) 1.881 (47.78) 0.218 (5.54) 0.273 (6.93) 0.06 (1.5) 0.06 (1.5)
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) 2.250 (57.15) 0.276 (7.01) 0.345 (8.76) 0.09 (2.3) 0.13 (3.3)
3 3.515 (89.28) ±0.007 (0.18) 0.023 (0.58) 3.491 (88.67) ±0.007 (0.18) 0.023 (0.58) 1.875 (47.63) 2.820 (71.63) 0.300 (7.62) 0.375 (9.53) 0.09 (2.3) 0.13 (3.3)
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) 2.125 (53.98) 3.280 (83.31) 0.318 (8.08) 0.398 (10.11) 0.09 (2.3) 0.13 (3.3)
4 4.517 (114.73) ±0.008 (0.20) 0.023 (0.58) 4.490 (114.04) ±0.008 (0.20) 0.023 (0.58) 2.250 (57.15) 3.737 (94.92) 0.337 (8.56) 0.420 (10.67) 0.09 (2.3) 0.13 (3.3)
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) 2.625 (66.68) 4.713 (119.71) 0.375 (9.53) 0.469 (11.91) 0.09 (2.3) 0.13 (3.3)
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) 5.646 (143.41) 0.432 (10.97) 0.540 (13.72) 0.13 (3.3) 0.19 (4.8)
8 8.655 (219.84) ±0.015 (0.38) 0.090 (2.29) 8.610 ±0.015 (0.38) 0.090 (2.29) 4.000 (101.60) 7.490 (190.25) 0.500 (12.70) 0.625 (15.88) 0.13 (3.3) 0.19 (4.8)
10 10.780 (273.81) ±0.015 (0.38) 0.100 (2.54) 10.735 (272.67) ±0.015 (0.38) 0.100 (2.54) 5.000 (127.00) 9.407 (238.94) 0.593 (15.06) 0.741 (18.82) 0.125 (3.18) 0.187 (4.76)
12 12.780 (324.61) ±0.015 (0.38) 0.120 (3.05) 12.735 (323.47) ±0.015 (0.38) 0.120 (3.05) 6.000 (152.40) 11.197 (284.40) 0.687 (17.45) 0.859 (21.82) 0.125 (3.18) 0.187 (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 6.1.4.
F439 − 24
TABLE 2 Minimum Dimensions from Center to End of Sockets
(Laying Length) for Couplings, Tees, 90° and 45° Elbows, CPVC
A
Socket-Type Pipe Fittings, Schedule 80, in. (mm)
Nominal
G, min J, min N, min
Pipe Size
⁄4 0.31 (7.9) 0.16 (4.1) 0.06 (1.5)
⁄8 0.38 (9.7) 0.19 (4.8) 0.09 (2.3)
⁄2 0.50 (12.7) 0.25 (6.4) 0.09 (2.3)
⁄4 0.56 (14.2) 0.31 (7.9) 0.09 (2.3)
1 0.69 (17.5) 0.31 (7.9) 0.09 (2.3)
1 ⁄4 0.88 (22.4) 0.38 (9.7) 0.09 (2.3)
1 ⁄2 1.00 (25.4) 0.44 (11.2) 0.09 (2.3)
2 1.25 (31.8) 0.63 (16.0) 0.09 (2.3)
2 ⁄2 1.50 (38.1) 0.69 (17.5) 0.19 (4.8)
3 1.81 (46.0) 0.75 (19.1) 0.19 (4.8)
3 ⁄2 2.13 (54.1) 1.00 (25.4) 0.19 (4.8)
4 2.31 (58.7) 1.00 (25.4) 0.19 (4.8)
5 3.00 (76.2) 1.38 (35.1) 0.19 (4.8)
6 3.50 (88.9) 1.75 (44.5) 0.25 (6.4)
8 4.50 (114) 2.00 (50.8) 0.25 (6.4)
10 5.687 (144.45) 2.25 (57.15) 0.25 (6.35)
12 6.875 (174.63) 2.50 (63.50) 0.375 (9.53)
A
The sketches and designs of fittings are illustrative only.
6.1.4 The minimum inside diameter of the fittings shall be not less than the minimum specified inside diameter of the
corresponding size of Schedule 80 pipe. This is calculated as follows:
~minimum OD!2 2 ×~maximum wall!5 minimum ID (1)
6.1.5 Minimum dimensions have zero negative tolerance. Tolerances on other dimensions are shown in Tables 1 and 3.
6.1.6 Fitting Not Illustrated—All fittings, whether illustrated in Tables 1-5 or not, shall maintain the dimensions conforming to
6.1 and 6.2.
6.2 Threads—For all fittings having taper pipe threads, threads shall conform to Specification F1498 and be gaged in accordance
with 8.4.
6.3 Burst Pressure:
6.3.1 The minimum burst strength of the fittings shall be not less than that calculated for the size and wall thickness of the pipe
with which it is to be used, when calculated from the following equation and using a stress of 6400 psi for 8–in. and smaller fittings,
and a stress of 5100 psi for fittings larger than 8–in.:
S 5 P D 2 t /2t (2)
~ !
O
where:
S = hoop stress, psi (MPa),
F439 − 24
A
TABLE 3 Symbols for Dimensions of Reducer Blushings, CPVC Socket-type Pipe Fittings, Schedule 80 , in. (mm)
Nominal Size Outside Diameter Tolerance on Outside Diameter Tolerance on Maximum
XA Outside Diameter XB Outside Diameter Out of Roundness
(max. minus min.)
1 1
⁄4 by ⁄8 0.540 (13.72) + 0.007 - 0.004 (0.18 - 0.10) 0.540 (13.72) ±0.004 (0.10) 0.016 (0.41)
3 1 1
⁄8 by ⁄4, ⁄8 0.675 (17.41) + 0.007 - 0.004 (0.18 - 0.10) 0.675 (17.41) ±0.004 (0.10) 0.016 (0.41)
1 3 1
⁄2 by ⁄8, ⁄4 0.840 (21.34) + 0.007 - 0.004 (0.18 - 0.10) 0.840 (21.34) ±0.004 (0.10) 0.016 (0.41)
3 1 3 1
⁄4 by ⁄2, ⁄8, ⁄4 1.050 (26.67) + 0.007 - 0.004 (0.18 - 0.10) 1.050 (26.67) ±0.004 (0.10) 0.020 (0.51)
1 3
1 by ⁄2 , ⁄4 1.315 (33.40) + 0.008 - 0.005 (0.20 - 0.13) 1.315 (33.40) ±0.005 (0.13) 0.020 (0.51)
1 1 3
1 ⁄4 by ⁄2, ⁄4,1 1.660 (42.16) + 0.008 - 0.005 (0.20 - 0.13) 1.660 (42.16) ±0.005 (0.13) 0.024 (0.61)
1 1 3 1
1 ⁄2 by ⁄2, ⁄4 1, 1 ⁄4 1.900 (48.26) + 0.010 - 0.
...