ASTM C923-08(2013)
(Specification)Standard Specification for Resilient Connectors Between Reinforced Concrete Manhole Structures, Pipes, and Laterals
Standard Specification for Resilient Connectors Between Reinforced Concrete Manhole Structures, Pipes, and Laterals
ABSTRACT
This specification covers resilient connectors between reinforced concrete manhole structures, pipes, and laterals. Resilient materials for connectors and filler rings shall be manufactured from natural or synthetic rubber and shall conform to the prescribed requirements. Mechanical devices shall be made from a material or materials in combination that will ensure durability, strength, resistance to corrosion, and have properties that will ensure continued resistance to leakage. The design of pipe connectors and pipe stubs are specified. The physical properties and chemical composition shall conform to the required tests for chemical resistance, tensile strength, elongation at break, hardness, accelerated oven-aging, compression set, water absorption, ozone resistance, low-temperature brittle point, and tear resistance.
SCOPE
1.1 This specification covers the minimum performance and material requirements for resilient connectors used for connections between reinforced concrete manholes conforming to Specification C478 and pipes, between wastewater structures and pipes, and between precast reinforced concrete pipe and laterals.
1.1.1 These connectors are designed to minimize leakage between the pipe and manhole, and between the pipe and lateral.
1.2 A complete metric companion to Specification C923 has been developed—C923M; therefore, no metric equivalents are presented in this specification. Note 1—This specification covers the design, material, and performance of the resilient connection only. Connections covered by this specification are adequate for hydrostatic pressures up to 13 psi (30 ft) without leakage when tested in accordance with Section 7. Infiltration or exfiltration quantities for an installed system are dependent upon many factors other than the connections between manhole structures and pipe, and allowable quantities must be covered by other specifications and suitable testing of the installed pipeline and system.
1.3 The following precautionary caveat pertains only to the test methods portion, Section 7, 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 and health practices and determine the applicability of regulatory limitations prior to use. For a specific precaution statement, see 7.2.5.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C923 −08(Reapproved 2013)
Standard Specification for
Resilient Connectors Between Reinforced Concrete Manhole
Structures, Pipes, and Laterals
This standard is issued under the fixed designation C923; 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 A493 Specification for Stainless Steel Wire and Wire Rods
for Cold Heading and Cold Forging
1.1 This specification covers the minimum performance and
A666 Specification forAnnealed or Cold-WorkedAustenitic
material requirements for resilient connectors used for connec-
Stainless Steel Sheet, Strip, Plate, and Flat Bar
tions between reinforced concrete manholes conforming to
C478 Specification for Circular Precast Reinforced Concrete
Specification C478 and pipes, between wastewater structures
Manhole Sections
and pipes, and between precast reinforced concrete pipe and
C822 Terminology Relating to Concrete Pipe and Related
laterals.
Products
1.1.1 These connectors are designed to minimize leakage
C913 Specification for Precast Concrete Water and Waste-
between the pipe and manhole, and between the pipe and
water Structures
lateral.
D395 Test Methods for Rubber Property—Compression Set
1.2 Acomplete metric companion to Specification C923 has
D412 Test Methods forVulcanized Rubber andThermoplas-
been developed—C923M; therefore, no metric equivalents are
tic Elastomers—Tension
presented in this specification.
D471 Test Method for Rubber Property—Effect of Liquids
D543 Practices for Evaluating the Resistance of Plastics to
NOTE 1—This specification covers the design, material, and perfor-
mance of the resilient connection only. Connections covered by this Chemical Reagents
specification are adequate for hydrostatic pressures up to 13 psi (30 ft)
D573 Test Method for Rubber—Deterioration in an Air
without leakage when tested in accordance with Section 7. Infiltration or
Oven
exfiltration quantities for an installed system are dependent upon many
D624 Test Method for Tear Strength of Conventional Vul-
factors other than the connections between manhole structures and pipe,
canized Rubber and Thermoplastic Elastomers
and allowable quantities must be covered by other specifications and
suitable testing of the installed pipeline and system.
D883 Terminology Relating to Plastics
D1149 Test Methods for Rubber Deterioration—Cracking in
1.3 The following precautionary caveat pertains only to the
an Ozone Controlled Environment
test methods portion, Section 7, of this specification: This
D1566 Terminology Relating to Rubber
standard does not purport to address all of the safety concerns,
D2137 Test Methods for Rubber Property—Brittleness Point
if any, associated with its use. It is the responsibility of the user
of Flexible Polymers and Coated Fabrics
of this standard to establish appropriate safety and health
D2240 Test Method for Rubber Property—Durometer Hard-
practices and determine the applicability of regulatory limita-
ness
tions prior to use. For a specific precaution statement, see
7.2.5.
NOTE 2—For more information about wastewater structures, see Speci-
fication C913.
2. Referenced Documents
2.1 ASTM Standards:
3. Terminology
3.1 Definitions:
This specification is under the jurisdiction of ASTM Committee C13 on 3.1.1 Terms relating to plastics and rubber shall be as
Concrete Pipe and is the direct responsibility of Subcommittee C13.06 on Manholes
defined in Terminologies D883 and D1566, respectively.
and Specials.
3.1.2 Terms relating to precast concrete pipe, manholes, and
Current edition approved July 1, 2013. Published July 2013. Originally approved
related products shall be as defined in Terminology C822 and
in 1979. Last previous edition approved in 2008 as C923 – 08. DOI: 10.1520/
C0923-08R13.
as modified in 3.1.3 – 3.1.6.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.1.3 connector—the entire assembly including resilient
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
seals and metallic or nonmetallic mechanical devices, if any,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. used therein.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C923−08 (2013)
3.1.4 lateral—the small diameter pipe connected to the resilient material between the outside surface of the pipe and
main line pipe. the pipe opening in the wall of the manhole or wastewater
structure,orbycastingtheconnectorintegrallywiththewallof
3.1.5 pipe—the inlet or outlet pipe connected to the man-
the manhole or wastewater structure. The seal between the
hole.
connector and the pipe shall be made by mechanical means or
3.1.6 pipe stub—a short section of pipe, installed in the
by compression of the resilient material against the outside of
structure as an inlet or outlet pipe, for future connection.
the pipe. Resilient filler rings are not prohibited from being
used between the pipe and the connector to provide a seal.
4. Materials and Manufacture
Whichever design is used, it shall be capable of maintaining a
4.1 All materials shall conform to the following require-
resilient, hydrostatic seal under the performance conditions in
ments:
accordance with Section 7. Devices used to effect mechanical
4.1.1 Resilient materials for connectors and filler rings shall
seals shall conform to the requirements specified in Section 4.
be manufactured from natural or synthetic rubber and shall
conform to the requirements prescribed in Table 1. If a splice 5.2 For lateral to pipe connectors, the design of the connec-
is used in the manufacture of the seal, its strength shall be such
tor shall be such that a positive seal is accomplished at two
that the seal shall withstand a 180° bend with no visible locations: (1) between the connector and the pipe wall and (2)
separation.
between the connector and the lateral. The seal between the
connectorandthepipewallshallbemadebyeithermechanical
4.2 Mechanical Devices—Expansion rings, tension bands,
means, compression, or by casting the connector integrally
and take-up devices used for mechanically compressing the
with the pipe wall. The seal between the connector and the
resilient portion of the connector against the pipe, manhole or
lateral shall be made by either mechanical means or by
wastewaterstructureshallbemadefromamaterialormaterials
compression of the resilient material against the outside of the
in combination that will ensure durability, strength, resistance
pipe. Resilient filler rings are not prohibited from being used
to corrosion, and have properties that will ensure continued
between the lateral and the connector to provide a seal.
resistance to leakage. All metallic mechanical devices, includ-
Connector design must not allow either lateral or connector to
ing castings and bolt assemblies used to mechanically deform
extend past the cylindrical plane of the pipe inside diameter.
resilient materials shall be constructed of corrosion resistant
The connector shall be capable of maintaining a resilient
materials meeting the physical properties and chemical com-
hydrostatic seal under the performance conditions in accor-
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