ASTM C1173-10(2014)
(Specification)Standard Specification for Flexible Transition Couplings for Underground Piping Systems
Standard Specification for Flexible Transition Couplings for Underground Piping Systems
ABSTRACT
This specification describes the properties of devices or assemblies suitable for use as flexible transition couplings for underground drainage and sewer piping systems. Couplings that may include bushings or inserts, and meet the requirements of this specification are suitable for joining plain end pipe or fittings. Couplings shall be permitted to have a center stop, the components shall be designed so that the elastomeric material is compressed to form a hydrostatic seal when the joint is assembled. Assemblies shall be tested in different areas and each component shall conform to specified physical and mechanical requirements, namely: hardness, tensile strength, elongation, heat aging, hardness, ozone resistance, water absorption, and chemical resistance for the elastomeric materials; tension band performance, torque resistance, free running torque for the stainless steel materials; and deflection sealing resistance, and shear loading resistance for the joint assemblies.
SCOPE
1.1 This specification describes the properties of devices or assemblies suitable for use as flexible transition couplings, hereinafter referred to as couplings, for underground drainage and sewer piping systems.
1.2 Couplings that may include bushings, inserts, or shear rings and conform to the requirements of this standard are suitable for joining plain end pipe or fittings. The pipe to be joined shall be of similar or dissimilar materials, 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.
1.5 The committee with jurisdiction over this standard is not aware of another comparable standard for materials covered in this standard.
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Designation:C1173 −10 (Reapproved 2014)
Standard Specification for
Flexible Transition Couplings for Underground Piping
Systems
This standard is issued under the fixed designation C1173; 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 D543Practices for Evaluating the Resistance of Plastics to
Chemical Reagents
1.1 This specification describes the properties of devices or
D573Test Method for Rubber—Deterioration in an Air
assemblies suitable for use as flexible transition couplings,
Oven
hereinafter referred to as couplings, for underground drainage
D624Test Method for Tear Strength of Conventional Vul-
and sewer piping systems.
canized Rubber and Thermoplastic Elastomers
1.2 Couplings that may include bushings, inserts, or shear
D638Test Method for Tensile Properties of Plastics
rings and conform to the requirements of this standard are
D1149TestMethodsforRubberDeterioration—Crackingin
suitable for joining plain end pipe or fittings. The pipe to be
an Ozone Controlled Environment
joined shall be of similar or dissimilar materials, size, or both.
D2240TestMethodforRubberProperty—DurometerHard-
1.3 Thevaluesstatedininch-poundunitsaretoberegarded ness
D3045Practice for Heat Aging of Plastics Without Load
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only D6147TestMethodforVulcanizedRubberandThermoplas-
tic Elastomer—Determination of Force Decay (Stress
and are not considered standard.
Relaxation) in Compression
1.4 TheASTM standards referenced herein shall be consid-
ered mandatory.
3. Terminology
1.5 Thecommitteewithjurisdictionoverthisstandardisnot
3.1 Definitions—For definitions of terms used in this
aware of another comparable standard for materials covered in
standard, see Terminology A644.
this standard.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
3.2.1 center stop, n—an integral part of the gasket centered
on its axial length intended to limit the insertion depth of the
2.1 ASTM Standards:
pipe to be coupled.
A240/A240MSpecification for Chromium and Chromium-
Nickel Stainless Steel Plate, Sheet, and Strip for Pressure
3.2.2 clamp assembly, n—that portion of the coupling ex-
Vessels and for General Applications
cluding the gasket.
A493Specification for Stainless Steel Wire and Wire Rods
3.2.3 coupling, n—the complete assembly.
for Cold Heading and Cold Forging
3.2.4 fitting, n—parts of a pipeline other than straight pipe
A644Terminology Relating to Iron Castings
D395Test Methods for Rubber Property—Compression Set couplings, or valves.
D412TestMethodsforVulcanizedRubberandThermoplas-
3.2.5 flexible transition couplings, n—devices used to form
tic Elastomers—Tension
a leakproof joint between sections of plain end pipe or fittings
D471Test Method for Rubber Property—Effect of Liquids
ofthesameordifferentmaterials,ofthesameordifferentsize,
or any combination of materials or pipe sizes.
3.2.6 free torque, n—the torque value expressed in
This specification is under the jurisdiction of ASTM Committee A04 on Iron
lbf·in./Nm when the clamp is tightened four revolutions of the
Castings and is the direct responsibility of Subcommittee A04.75 on Gaskets and
Coupling for Plumbing and Sewer Piping.
screw nut; while in the free state, this value does not include
Current edition approved Oct. 1, 2014. Published October 2014. Originally
any breakaway effects due to staking or passage of the band
approved in 1991. Last previous edition approved in 2010 as C1173–10. DOI:
ends beyond the screw heads.
10.1520/C1173-10R14.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.2.7 inserts, n—a bushing or ring placed into the coupling
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
socket to accommodate pipe materials of differing outside
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. diameters.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1173−10 (2014)
TABLE 1 Test Requirements
3.2.8 joint, n—the completed assembly of parts consisting
of the flexible transition coupling and the joined pipes, or Physical ASTM Test
Properties
Requirements Method
fittings, or both.
Elastomeric Materials
3.2.9 lot, n—a specific quantity of similar material or
Hardness, Nominal Shore “A” Durometer 50–75 D2240
as specified by the coupling manufacturer
collection of similar units from a common source; the quantity
Hardness, Nominal Shore “D” Durometer 35–45 D2240
offered for inspection and acceptance at any one time. A lot
as specified by the coupling manufacturer
might comprise a shipment, batch, or similar quantity.
Tensile strength, min psi (KPa) 1000 (6894) D412,Die C,
Fig. 2 or D638
3.2.10 manufacturer, n—the entity that produces the cou-
Elongation at rupture, min, % 200 D412,Die C,
pling.
Fig. 2 or D638
Heat aging, 70 h, 158 ± 3.6°F (70 ± 2°C) D573 or D3045
3.2.11 plain end pipe, n—anypipethatdoesnotincludeany
Hardness increase, maximum Durometer 10
bell, hub, threaded area, or other means of joining.
points
Change in tensile strength, max, % 25
3.2.12 shear ring, n—an interior or exterior element which
Change in elongation, max, % 35
Ozone resistance No cracks D1149
is used to span the distance between the pipe ends within a
At 20 % elongation
couplingsoastoprovideincreasedresistancetoaxialdisplace-
For 100 h at 104± 3.6°F (40 ± 2°C)
ment.
With 50 parts per 100 million
Water absorption, weight gain, %, max 20 D471
Chemical resistance, 48 h, 74± 3.6°F (23 ±no weight loss D543
4. Classification
2°C)
Compression Set, max, % 25 D395 Method B
4.1 The couplings shall be permitted to have a center stop.
Stress Relaxation, min. % Force Retention 30 D6147
The components shall be designed so that the elastomeric
Tear Strength, min, lbf/in. (N/cm) 150 (268.5) D624 Die C
material is compressed to form a hydrostatic seal when the
joint is assembled. The couplings shall be of the types
described in 4.1.1 – 4.1.3.
performance in service. The flash extension shall not exceed 1
4.1.1 Type A—A coupling consisting of an elastomeric
mm at any point where the presence of flash affects perfor-
gasket incorporating corrosion resistant tension bands and
mance.
tightening mechanism. Couplings shall be fabricated without
6.4 Elastomericgasketsandinsertsshallbecompatiblewith
shearrings,withorwithoutinsertsandwithorwithoutacenter
thedimensionsandtolerancesofthespecificmaterialtowhich
stop.
it is designed to join.
4.1.2 Type B—A coupling consisting of an elastomeric
gasket incorporating a corrosion resistant shear ring, tension
7. Clamp Assembly Requirements
bandsandtighteningmechanism.Couplingsshallbefabricated
7.1 All metallic components shall be of 300 series stainless
with shear rings, with or without inserts and with or without a
steel conforming to the requirements of Specification A240/
center stop (Note 1).
A240M.All metallic components made from round stock shall
4.1.3 Type C—Acoupling fabricated with elastomeric com-
be of 300 series stainless steel conforming to the requirements
pression seals.
of Specification A493 (excluding copper bearing alloys).
NOTE1—Theprovisionsofthisstandardarenotintendedtopreventthe
7.2 Clamp assemblies, tension bands, tightening mecha-
useofanyalternatematerialormethodofconstruction,providedanysuch
alternate meets the requirements of this standard. nisms shall conform to the performance requirements as set
forth in section 10.2 of this standard.
5. Materials and Manufacture
8. Dimensions
5.1 Elastomeric materials used in the manufacturing of
8.1 Couplings and bushing dimensions shall be compatible
couplings and inserts shall comply with the requirements of
with the dimensions and tolerances of the specific material to
section 10.1 and Table 1 of this standard.
which it is designed to join.
5.2 All metallic components shall be manufactured of 300
series stainless steel.
9. Sampling, Tests, and Retests
9.1 Test specimens representative of the couplings to be
6. Elastomeric Gasket Requirements
used shall be randomly selected from the manufactured lot for
6.1 The elastomeric gasket shall conform to the physical testing.
properties as specified in section 5.1 of this standard.
9.2 Onecouplingforeachsizeortypeshallbetested,unless
otherwise specified or waived by the purchaser.
6.2 Elastomericgasketsandinsertsofsingle,multi-piece,or
splicedconstructionshallshownosignsofseparation,peeling,
9.3 Wherethereisafa
...
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.
´1
Designation: C1173 − 10 C1173 − 10 (Reapproved 2014)
Standard Specification for
Flexible Transition Couplings for Underground Piping
Systems
This standard is issued under the fixed designation C1173; 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.
ε NOTE—Sections 5.1 and 7.2 were editorially corrected in May 2011.
1. Scope
1.1 This specification describes the properties of devices or assemblies suitable for use as flexible transition couplings,
hereinafter referred to as couplings, for underground drainage and sewer piping systems.
1.2 Couplings that may include bushings, inserts, or shear rings and conform to the requirements of this standard are suitable
for joining plain end pipe or fittings. The pipe to be joined shall be of similar or dissimilar materials, 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.
1.5 The committee with jurisdiction over this standard is not aware of another comparable standard for materials covered in this
standard.
2. Referenced Documents
2.1 ASTM Standards:
A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and
for General Applications
A493 Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging
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
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D573 Test Method for Rubber—Deterioration in an Air Oven
D624 Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers
D638 Test Method for Tensile Properties of Plastics
D1149 Test Methods for Rubber Deterioration—Cracking in an Ozone Controlled Environment
D2240 Test Method for Rubber Property—Durometer Hardness
D3045 Practice for Heat Aging of Plastics Without Load
D6147 Test Method for Vulcanized Rubber and Thermoplastic Elastomer—Determination of Force Decay (Stress Relaxation)
in Compression
3. Terminology
3.1 Definitions—For definitions of terms used in this standard, see Terminology A644.
3.2 Definitions of Terms Specific to This Standard:
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 Dec. 15, 2010Oct. 1, 2014. Published January 2011October 2014. Originally approved in 1991. Last previous edition approved in 20082010 as
C1173 – 08.C1173 – 10. DOI: 10.1520/C1173-10.10.1520/C1173-10R14.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1173 − 10 (2014)
3.2.1 center stop, n—an integral part of the gasket centered on its axial length intended to limit the insertion depth of the pipe
to be coupled.
3.2.2 clamp assembly, n—that portion of the coupling excluding the gasket.
3.2.3 coupling, n—the complete assembly.
3.2.4 fitting, n—parts of a pipeline other than straight pipe couplings, or valves.
3.2.5 flexible transition couplings, n—devices used to form a leakproof joint between sections of plain end pipe or fittings of
the same or different materials, of the same or different size, or any combination of materials or pipe sizes.
3.2.6 free torque, n—the torque value expressed in lbf·in./Nm when the clamp is tightened four revolutions of the screw nut;
while in the free state, this value does not include any breakaway effects due to staking or passage of the band ends beyond the
screw heads.
3.2.7 inserts, n—a bushing or ring placed into the coupling socket to accommodate pipe materials of differing outside diameters.
3.2.8 joint, n—the completed assembly of parts consisting of the flexible transition coupling and the joined pipes, or fittings,
or both.
3.2.9 lot, n—a specific quantity of similar material or collection of similar units from a common source; the quantity offered
for inspection and acceptance at any one time. A lot might comprise a shipment, batch, or similar quantity.
3.2.10 manufacturer, n—the entity that produces the coupling.
3.2.11 plain end pipe, n—any pipe that does not include any bell, hub, threaded area, or other means of joining.
3.2.12 shear ring, n—an interior or exterior element which is used to span the distance between the pipe ends within a coupling
so as to provide increased resistance to axial displacement.
4. Classification
4.1 The couplings shall be permitted to have a center stop. The components shall be designed so that the elastomeric material
is compressed to form a hydrostatic seal when the joint is assembled. The couplings shall be of the types described in 4.1.1 – 4.1.3.
4.1.1 Type A—A coupling consisting of an elastomeric gasket incorporating corrosion resistant tension bands and tightening
mechanism. Couplings shall be fabricated without shear rings, with or without inserts and with or without a center stop.
4.1.2 Type B—A coupling consisting of an elastomeric gasket incorporating a corrosion resistant shear ring, tension bands and
tightening mechanism. Couplings shall be fabricated with shear rings, with or without inserts and with or without a center stop
(Note 1).
4.1.3 Type C—A coupling fabricated with elastomeric compression seals.
NOTE 1—The provisions of this standard are not intended to prevent the use of any alternate material or method of construction, provided any such
alternate meets the requirements of this standard.
5. Materials and Manufacture
5.1 Elastomeric materials used in the manufacturing of couplings and inserts shall comply with the requirements of section 10.1
and Table 1 of this standard.
5.2 All metallic components shall be manufactured of 300 series stainless steel.
6. Elastomeric Gasket Requirements
6.1 The elastomeric gasket shall conform to the physical properties as specified in section 5.1 of this standard.
6.2 Elastomeric gaskets and inserts of single, multi-piece, or spliced construction shall show no signs of separation, peeling, or
other defects when tested in accordance with Section 9.
6.3 Elastomeric gaskets and inserts of single, multi-piece, or spliced construction shall be free from porosity and air pockets.
Its surface shall be smooth and free from pitting, cracks, blisters, air marks, or any other imperfections that affect its performance
in service. The flash extension shall not exceed 1 mm at any point where the presence of flash affects performance.
6.4 Elastomeric gaskets and inserts shall be compatible with the dimensions and tolerances of the specific material to which it
is designed to join.
7. Clamp Assembly Requirements
7.1 All metallic components shall be of 300 series stainless steel conforming to the requirements of Specification A240/A240M.
All metallic components made from round stock shall be of 300 series stainless steel conforming to the requirements of
Specification A493 (excluding copper bearing alloys).
7.2 Clamp assemblies, tension bands, tightening mechanisms shall conform to the performance requirements as set forth in
section 10.2 of this standard.
C1173 − 10 (2014)
TABLE 1 Test Requirements
Physical ASTM Test
Properties
Requirements Method
Elastomeric Materials
Hardness, Nominal Shore “A” Durometer 50–75 D2240
as specified by the coupling manufacturer
Hardness, Nominal Shore “D” Durometer 35–45 D2240
as specified by the coupling manufacturer
Tensile strength, min psi (KPa) 1000 (6894) D412, Die C,
Fig. 2 or D638
Elongation at rupture, min, % 200 D412, Die C,
Fig. 2 or D638
Heat aging, 70 h, 158 ± 3.6°F (70 ± 2°C) D573 or D3045
Hardness increase, maximum Durometer 10
points
Change in tensile strength, max, % 25
Change in elongation, max, % 35
Ozone resistance No cracks D1149
At 20 % elongation
For 100 h at 104± 3.6°F (40 ± 2°C)
With 50 parts per 100 million
Water absorption, weight gain, %, max 20 D471
Chemical resistance, 48 h, 74± 3.6°F (23 ±no weight loss D543
2°C)
Compression Set, max, % 25 D395 Method B
Stress Relaxation
...
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