ASTM C1461-08(2013)
(Specification)Standard Specification for Mechanical Couplings Using Thermoplastic Elastomeric (TPE) Gaskets for Joining Drain, Waste, and Vent (DWV), Sewer, Sanitary, and Storm Plumbing Systems for Above and Below Ground Use
Standard Specification for Mechanical Couplings Using Thermoplastic Elastomeric (TPE) Gaskets for Joining Drain, Waste, and Vent (DWV), Sewer, Sanitary, and Storm Plumbing Systems for Above and Below Ground Use
ABSTRACT
This specification covers the performance of shielded transition couplings using flexible PVC gaskets to join dissimilar DWV pipe and fittings above and below ground. The gaskets shall be permitted to be spliced or molded. The elastomeric gasket shall be free from imperfections and porosity that affects its use and serviceability. Clamps assembly screws or bolts shall not have screw-driver slots. Each coupling shall undergo deflection test, shear test, and unrestrained hydrostatic joint test.
SCOPE
1.1 This specification describes the properties of devices or assemblies suitable for use as mechanical couplings using thermoplastic elastomeric (TPE) gaskets, hereinafter referred to as couplings, for joining drain, waste, and vent (DWV) sewer, sanitary, and storm plumbing systems for above and below ground use.
1.2 The pipe to be joined shall be of similar or dissimilar materials or size, or both.
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 ASTM standards referenced herein shall be considered mandatory.
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Designation:C1461 −08 (Reapproved 2013)
Standard Specification for
Mechanical Couplings Using Thermoplastic Elastomeric
(TPE) Gaskets for Joining Drain, Waste, and Vent (DWV),
Sewer, Sanitary, and Storm Plumbing Systems for Above
and Below Ground Use
This standard is issued under the fixed designation C1461; 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 3.2.1 center stop—an integral part of the gasket centered on
its axial length intended to limit the insertion depth of the pipe
1.1 This specification describes the properties of devices or
to be coupled.
assemblies suitable for use as mechanical couplings using
3.2.2 fitting—parts of a pipeline other than straight pipe,
thermoplastic elastomeric (TPE) gaskets, hereinafter referred
couplings, or valves.
to as couplings, for joining drain, waste, and vent (DWV)
sewer, sanitary, and storm plumbing systems for above and
3.2.3 free torque—the torque value expressed in lbf-in.
below ground use.
(N-m) when the clamp is tightened four revolutions of the
screw nut. While in the free state, this value does not include
1.2 The pipe to be joined shall be of similar or dissimilar
any breakaway effects due to staking method or passage of the
materials or size, or both.
band ends beyond the screw heads.
1.3 The values stated in inch-pound units are to be regarded
3.2.4 inserts—a bushing or ring placed into the coupling
as standard. The values given in parentheses are mathematical
socket to accommodate pipe materials of differing outside
conversions to SI units that are provided for information only
diameters.
and are not considered standard.
3.2.5 joint—the completed assembly of parts consisting of
1.4 TheASTM standards referenced herein shall be consid-
the flexible transition coupling and the joined pipes or fittings,
ered mandatory.
or both.
3.2.6 lot—a specific quantity of similar material or collec-
2. Referenced Documents
tion of similar units from a common source; the quantity
2.1 ASTM Standards:
offered for inspection and acceptance at any one time. A lot
A644Terminology Relating to Iron Castings
might comprise a shipment, batch, or similar quantity.
C1440Specification for Thermoplastic Elastomeric (TPE)
3.2.7 mechanical couplings—devices used to join between
Gasket Materials for Drain, Waste, and Vent (DWV),
sections of plain end pipe or fittings of the same or different
Sewer, Sanitary and Storm Plumbing Systems
materials, of the same or different size, or any combination of
materials and pipe sizes.
3. Terminology
3.2.8 plain-end pipe—any pipe that does not include any
3.1 Definitions—For definitions of terms used in this
bell, hub, threaded area, or other means of joining.
specification, see Terminology A644.
3.2.9 shear ring—an interior or exterior element which is
3.2 Definitions of Terms Specific to This Standard:
used to span the distance between the pipe ends within a
couplingsoastoprovideincreasedresistancetoaxialdisplace-
ment.
This specification is under the jurisdiction of ASTM Committee A04 on Iron
4. Classification
Castings and is the direct responsibility of Subcommittee A04.75 on Gaskets and
Coupling for Plumbing and Sewer Piping.
4.1 The couplings shall have a center stop unless telescop-
Current edition approved May 1, 2013. Published May 2013. Originally
ing of the pipe is necessary for special applications. The
approved in 2000. Last previous edition approved in 2008 as C1461–08. DOI:
10.1520/C1461-08R13.
components shall be designed so that the elastomeric material
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
is compressed to form a hydrostatic seal when the joint is
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
assembled. The couplings shall be of the types described in
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.1.1 – 4.1.3.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1461−08 (2013)
4.1.1 Unshielded—A coupling consisting of an elastomeric 8.3 Wherethereisafailureintheoriginaltest,theentiretest
sleeve incorporating corrosion-resistant tension bands and a shallbererunwithtwicethenumberofsamplesandanyfailure
tightening mechanism. Couplings shall be fabricated without shall be cause for rejection.
shear rings. Couplings installed without metallic shear rings
9. Test Methods
shall not be installed in fire-resistive construction.
4.1.2 Shielded—A coupling consisting of an elastomeric or
9.1 Elastomeric Materials—Physical properties of gaskets
rubbersleeveincorporatingametalliccorrosion-resistantshear
shall be in accordance with specificationASTM C1440. Many
ring and tension bands or tightening mechanism, or both.
thermoplastic elastomeric gaskets are temperature-sensitive.
4.1.3 Other—Acoupling (gasket) fabricated for elastomeric
Refer to Specification C1440 for the allowable temperature
compression seals.
range of materials.
9.2 Tension Band Performance:
5. Materials and Manufacture
9.2.1 Torque Resistance—Stainless steel tension bands shall
5.1 Elastomeric materials used in the manufacturing of
be tested to withstand 150% of the manufacturer’s specified
couplings and inserts shall comply with the requirements in
installation torque without visible signs of failure. The band
accordance with Specification C1440.
shall be tested over a steel mandrel of the appropriate coupling
diameter and torqued as required.
5.2 The stainless steel tension band assembly shall be 300
9.2.2 The maximum free running torque shall be 4 lbf-in.
series stainless steel, excluding copper bearing alloys, meeting
(0.45 N-m).
the requirements of the appropriate ASTM standard for stain-
9.2.2.1 Stainless steel tension bands with torque resistance
less steel.
in excess of 100 lbf-in. shall have a maximum free running
5.3 Couplings with bushings or inserts, or both, of multi-
torque of 8 lbf-in.
piece construction or with splices shall show no separation,
9.2.3 Test Procedure for Free Running Torque:
peeling, or other defects when tested in accordance with
9.2.3.1 With the nonstressed clamp hand-held and the slot-
Section 9.
ted band fully engaged, the screw shall be rotated clockwise
four revolutions with the maximum value of the torque meter
5.4 Thecouplingshallbefreefromporosityandairpockets.
Its surface shall be smooth and free from pitting, cracks, recorded.
9.2.3.2 The equipment required shall be a hand-held torque
blisters, air marks, or any other imperfections that affect its
performance in service. The
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