ASTM C1440-21

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Designation: C1440 − 17 C1440 − 21
Standard Specification for
Thermoplastic Elastomeric (TPE) Gasket Materials for Drain,
Waste, and Vent (DWV), Sewer, Sanitary, and Storm
Plumbing Systems
This standard is issued under the fixed designation C1440; 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 specification covers thermoplastic elastomeric (TPE) gasket materials for preformed elastomeric gaskets used in shielded
and non-shielded mechanical couplings. These couplings are used in gravity flow drain, waste, and vent (DWV), sewer, sanitary,
and storm plumbing systems. They include couplings to join similar and dissimilar piping sizes and material.
1.2 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.
1.3 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.
1.4 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:
A644 Terminology Relating to Iron Castings
D395 Test Methods for Rubber Property—Compression Set
D412 Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension
D471 Test Method for Rubber Property—Effect of Liquids
D573 Test Method for Rubber—Deterioration in an Air Oven
D624 Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers
D1149 Test Methods for Rubber Deterioration—Cracking in an Ozone Controlled Environment
D1415 Test Method for Rubber Property—International Hardness
D2240 Test Method for Rubber Property—Durometer Hardness
D5964 Practice for Rubber IRM 901, IRM 902, and IRM 903 Replacement Oils for ASTM No. 1, ASTM No. 2, ASTM No. 3
Oils, and IRM 905 formerly ASTM No. 5 Oil
This specification is under the jurisdiction of ASTM Committee A04 on Iron Castings and is the direct responsibility of Subcommittee A04.75 on Gaskets and Coupling
for Plumbing and Sewer Piping.
Current edition approved Nov. 15, 2017Sept. 1, 2021. Published November 2017September 2021. Originally approved in 1999. Last previous edition approved in
ɛ1
20132017 as C1440 – 08 (2013)C1440 – 17. . DOI: 10.1520/C1440-17.10.1520/C1440-21.
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.
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C1440 − 21
3. Terminology
3.1 Definitions—Refer to Terminology A644 for definitions of the following terms used in this specification: elastomer,
elastomeric, elongation, gasket, hardness, preformed gasket-(see gasket), thermoplastic elastomer.
4. Materials and Manufacture
4.1 Gaskets shall be made of virgin thermoplastic elastomeric compound, where the primary elastomer is a thermoplastic
vulcanizate containing only clean, reworked thermoplastic elastomer material from the manufacturer’s own production of the same
compound.
4.2 Where splices are made in the gasket, the strength of the splice shall be such that the gasket will withstand the stretch test
described in 8.9 with no visible separation or peeling.
4.3 Many thermoplastic elastomeric materials (TPEs) are temperature sensitive. Designed operating temperature range for the 90
Shore A TPE materials is 0 to 130 °F (–18 to 55 °C). These materials are not designed or intended for prolonged operation outside
this range.
5. Physical Properties
5.1 Gaskets representative of the manufacturer’s production shall be selected as specified in Section 7 and shall conform to the
requirements for physical properties listed in Table 1 when tested in accordance with the methods specified in Section 8.
6. Workmanship, Finish, and Appearance
6.1 The surface of the gasket shall be smooth and free of pitting, cracks, blisters, air marks, and any other imperfections that will
affect its behavior in service. The body of the gasket shall be free of porosity and air pockets.
6.2 Neither the flash thickness nor the flash extension shall exceed ⁄32 in. (0.8 mm), at any point on the ring.
6.3 The offset, or failure of the mold to register accurately, shall not exceed ⁄64 in. (0.4 mm).
TABLE 1 Physical Requirements of Gasket Materials
ASTM Test
A
Properties Tested TPE
Method
Hardness, Shore A (±5 pts) D2240 90 (5 s Delay)
Hardness, Shore A (±5 pts) D2240 90 (5 s delay)
Elongation, min, % D412 250
Tensile Strength, min, psi (kPa) D412 1500 (10 342)
Heat Aging D573
96 h at 158 ± 4 °F (70 ± 2 °C)
Hardness increase, max, pts. Shore A 10
Loss in tensile strength, max, % 15
Loss i
...