ASTM C923-08(2013)e1
(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.
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´1
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.
ε NOTE—Editorially corrected 5.3 in January 2016.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers the minimum performance and
A493 Specification for Stainless Steel Wire and Wire Rods
material requirements for resilient connectors used for connec-
for Cold Heading and Cold Forging
tions between reinforced concrete manholes conforming to
A666 Specification forAnnealed or Cold-WorkedAustenitic
Specification C478 and pipes, between wastewater structures
Stainless Steel Sheet, Strip, Plate, and Flat Bar
and pipes, and between precast reinforced concrete pipe and
C478 Specification for Circular Precast Reinforced Concrete
laterals.
Manhole Sections
1.1.1 These connectors are designed to minimize leakage
C822 Terminology Relating to Concrete Pipe and Related
between the pipe and manhole, and between the pipe and
Products
lateral.
C913 Specification for Precast Concrete Water and Waste-
1.2 Acomplete metric companion to Specification C923 has
water Structures
been developed—C923M; therefore, no metric equivalents are
D395 Test Methods for Rubber Property—Compression Set
presented in this specification.
D412 Test Methods forVulcanized Rubber andThermoplas-
tic Elastomers—Tension
NOTE 1—This specification covers the design, material, and perfor-
mance of the resilient connection only. Connections covered by this D471 Test Method for Rubber Property—Effect of Liquids
specification are adequate for hydrostatic pressures up to 13 psi (30 ft)
D543 Practices for Evaluating the Resistance of Plastics to
without leakage when tested in accordance with Section 7. Infiltration or
Chemical Reagents
exfiltration quantities for an installed system are dependent upon many
D573 Test Method for Rubber—Deterioration in an Air
factors other than the connections between manhole structures and pipe,
Oven
and allowable quantities must be covered by other specifications and
suitable testing of the installed pipeline and system. D624 Test Method for Tear Strength of Conventional Vul-
canized Rubber and Thermoplastic Elastomers
1.3 The following precautionary caveat pertains only to the
D883 Terminology Relating to Plastics
test methods portion, Section 7, of this specification: This
D1149 Test Methods for Rubber Deterioration—Cracking in
standard does not purport to address all of the safety concerns,
an Ozone Controlled Environment
if any, associated with its use. It is the responsibility of the user
D1566 Terminology Relating to Rubber
of this standard to establish appropriate safety and health
D2137 Test Methods for Rubber Property—Brittleness Point
practices and determine the applicability of regulatory limita-
of Flexible Polymers and Coated Fabrics
tions prior to use. For a specific precaution statement, see
D2240 Test Method for Rubber Property—Durometer Hard-
7.2.5.
ness
NOTE 2—For more information about wastewater structures, see Speci-
fication C913.
This specification is under the jurisdiction of ASTM Committee C13 on
Concrete Pipe and is the direct responsibility of Subcommittee C13.06 on Manholes
and Specials. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved July 1, 2013. Published July 2013. Originally approved contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in 1979. Last previous edition approved in 2008 as C923 – 08. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
C0923-08R13E01. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
C923−08 (2013)
NOTE 3—Experience has shown that successful performance of this
3. Terminology
product depends on the type of bedding and backfill and the care in the
3.1 Definitions:
field installation of the manhole or wastewater structure and connecting
3.1.1 Terms relating to plastics and rubber shall be as
pipes.Theowneriscautionedtorequireinspectionattheconstructionsite.
defined in Terminologies D883 and D1566, respectively.
3.1.2 Terms relating to precast concrete pipe, manholes, and
5. Principles of Design
related products shall be as defined in Terminology C822 and
5.1 The design of the connector shall be such that positive
as modified in 3.1.3 – 3.1.6.
seal is accomplished at two locations: (1) between the connec-
3.1.3 connector—the entire assembly including resilient
tor and the wall of the manhole or wastewater structure and (2)
seals and metallic or nonmetallic mechanical devices, if any,
between the connector and the pipe. The seal between the
used therein.
connector and the wall of the manhole or wastewater structure
3.1.4 lateral—the small diameter pipe connected to the
shall be made by either mechanical means, compression of the
main line pipe.
resilient material between the outside surface of the pipe and
3.1.5 pipe—the inlet or outlet pipe connected to the man-
the pipe opening in the wall of the manhole or wastewater
hole.
structure,orbycastingtheconnectorintegrallywiththewallof
3.1.6 pipe stub—a short section of pipe, installed in the
the manhole or wastewater structure. The seal between the
structure as an inlet or outlet pipe, for future connection.
connector and the pipe shall be made by mechanical means or
by compression of the resilient material against the outside of
4. Materials and Manufacture
the pipe. Resilient filler rings are not prohibited from being
4.1 All materials shall conform to the following require-
used between the pipe and the connector to provide a seal.
ments:
Whichever design is used, it shall be capable of maintaining a
4.1.1 Resilient materials for connectors and filler rings shall
resilient, hydrostatic seal under the performance conditions in
be manufactured from natural or synthetic rubber and shall
accordance with Section 7. Devices used to effect mechanical
conform to the requirements prescribed in Table 1. If a splice
seals shall conform to the requirements specified in Section 4.
is used in the manufacture of the seal, its strength shall be such
5.2 For lateral to pipe connectors, the design of the connec-
that the seal shall withstand a 180° bend with no visible
tor shall be such that a positive seal is accomplished at two
separation.
locations: (1) between the connector and the pipe wall and (2)
4.2 Mechanical Devices—Expansion rings, tension bands,
between the connector and the lateral. The seal between the
and take-up devices used for mechanically compressing the
connectorandthepipewallshallbemadebyeithermechanical
resilient portion of the connector against the pipe, manhole or
means, compression, or by casting the connector integrally
wastewaterstructureshallbemadefromamaterialormaterials
with the pipe wall. The seal between the connector and the
in combination that will ensure durability, strength, resistance
lateral shall be made by either mechanical means or by
to corrosion, and have properties that will ensure continued
compression of the resilie
...
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: C923 − 08 (Reapproved 2013) 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.
ε NOTE—Editorially corrected 5.3 in January 2016.
1. 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.
2. Referenced Documents
2.1 ASTM Standards:
A493 Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging
A666 Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar
C478 Specification for Circular Precast Reinforced Concrete Manhole Sections
C822 Terminology Relating to Concrete Pipe and Related Products
C913 Specification for Precast Concrete Water and Wastewater Structures
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
D883 Terminology Relating to Plastics
D1149 Test Methods for Rubber Deterioration—Cracking in an Ozone Controlled Environment
D1566 Terminology Relating to Rubber
D2137 Test Methods for Rubber Property—Brittleness Point of Flexible Polymers and Coated Fabrics
D2240 Test Method for Rubber Property—Durometer Hardness
This specification is under the jurisdiction of ASTM Committee C13 on Concrete Pipe and is the direct responsibility of Subcommittee C13.06 on Manholes and Specials.
Current edition approved July 1, 2013. Published July 2013. Originally approved in 1979. Last previous edition approved in 2008 as C923 – 08. DOI:
10.1520/C0923-08R13.10.1520/C0923-08R13E01.
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
´1
C923 − 08 (2013)
NOTE 2—For more information about wastewater structures, see Specification C913.
3. Terminology
3.1 Definitions:
3.1.1 Terms relating to plastics and rubber shall be as defined in Terminologies D883 and D1566, respectively.
3.1.2 Terms relating to precast concrete pipe, manholes, and related products shall be as defined in Terminology C822 and as
modified in 3.1.3 – 3.1.6.
3.1.3 connector—the entire assembly including resilient seals and metallic or nonmetallic mechanical devices, if any, used
therein.
3.1.4 lateral—the small diameter pipe connected to the main line pipe.
3.1.5 pipe—the inlet or outlet pipe connected to the manhole.
3.1.6 pipe stub—a short section of pipe, installed in the structure as an inlet or outlet pipe, for future connection.
4. Materials and Manufacture
4.1 All materials shall conform to the following requirements:
4.1.1 Resilient materials for connectors and filler rings shall be manufactured from natural or synthetic rubber and shall conform
to the requirements prescribed in Table 1. If a splice is used in the manufacture of the seal, its strength shall be such that the seal
shall withstand a 180° bend with no visible separation.
4.2 Mechanical Devices—Expansion rings, tension bands, and take-up devices used for mechanically compressing the resilient
portion of the connector against the pipe, manhole or wastewater structure 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. All metallic mechanical devices, including castings and bolt assemblies used to mechanically deform resilient materials
shall be constructed of corrosion resistant materials meeting the physical properties and chemical composition requirements of
Specifications A493 and A666, Type 302 through Type 316.
NOTE 3—Experience has shown that successful performance of this product depends on the type of bedding and backfill and the care in the field
installation of the manhole or wastewater structure and connecting pipes. The owner is cautioned to require inspection at the construction site.
5. Principles of Design
5.1 The design of the connector shall be such that positive seal is accomplished at two locations: (1) between the connector and
the wall of the manhole or wastewater structure and (2) between the connector and the pipe. The seal between the connector and
the wall of the manhole or wastewater structure shall be made by either mechanical means, compression of the resilient material
between the outside surface of the pipe and the pipe opening in the wall of the manhole or wastewater structure, or by casting the
connector integrally with the wall of the manhole or wastewater structure. The seal between the connector and the pipe shall be
made by mechanical means or by compression of the resilient material against the outside of the pipe. Resilient filler rings are not
prohibited from being used between the pipe and the connector to provide a seal. Whichever design is used, it shall be capable
of maintaining a resilient, hydrostatic seal under the performance conditions in accordance with Section 7. Devices used to effect
mechanical seals shall conform to the requirements specified in Section 4.
TABLE 1 Resilient Material Tests
A
Te
...
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