ASTM C923-00
(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
SCOPE
1.1 This specification covers the minimum performance and material requirements for resilient connectors used for connections between precast reinforced concrete manholes conforming to Specification C478 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
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 923 – 00
Standard Specification for
Resilient Connectors Between Reinforced Concrete Manhole
Structures, Pipes, and Laterals
This standard is issued under the fixed designation C 923; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope C 822 Terminology Relating to Concrete Pipe and Related
Products
1.1 This specification covers the minimum performance and
C 913 Specification for Precast Concrete Water and Waste-
material requirements for resilient connectors used for connec-
water Structures
tions between reinforced concrete manholes and pipes, be-
D 395 Test Methods for Rubber Property—Compression
tween wastewater structures and pipes, and between wastewa-
Set
ter structures and between reinforced concrete pipe and
D 412 Test Methods for Vulcanized Rubber and Thermo-
laterals.
plastic Rubbers and Thermoplastic Elastomers—Tension
1.1.1 These connectors are designed to minimize leakage
D 471 Test Method for Rubber Property—Effect of Liq-
between the pipe and manhole, and between the pipe and
uids
lateral.
D 543 Test Method for Resistance of Plastics to Chemical
1.2 A complete metric companion to Specification C 923
Reagents
has been developed—C 923M; therefore, no metric equivalents
D 573 Test Method for Rubber—Deterioration in an Air
are presented in this specification.
Oven
NOTE 1—This specification covers the design, material, and perfor-
D 624 Test Method for Tear Strength of Conventional
mance of the resilient connection only. Connections covered by this
Vulcanized Rubber and Thermoplastic Elastomer
specification are adequate for hydrostatic pressures up to 13 psi (30 ft)
D 746 Test Method for Brittleness Temperature of Plastics
without leakage when tested in accordance with Section 7. Infiltration or
and Elastomers by Impact
exfiltration quantities for an installed system are dependent upon many
factors other than the connections between manhole structures and pipe, D 883 Terminology Relating to Plastics
and allowable quantities must be covered by other specifications and
D 1171 Test Method for Rubber Deterioration—Surface
suitable testing of the installed pipeline and system.
Ozone Cracking Outdoors or Chamber (Triangular Speci-
mens)
1.3 The following precautionary caveat pertains only to the
D 1566 Terminology Relating to Rubber
test methods portion, Section 7, of this specification: This
D 2240 Test Method for Rubber Property—Durometer
standard does not purport to address all of the safety concerns,
Hardness
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
3. Terminology
practices and determine the applicability of regulatory limita-
3.1 Definitions:
tions prior to use. For a specific precaution statement, see
3.1.1 Terms relating to plastics and rubber shall be as
7.2.5.
defined in Terminologies D 883 and D 1566, respectively.
2. Referenced Documents
3.1.2 Terms relating to precast concrete pipe, manholes, and
related products shall be as defined in Terminology C 822 and
2.1 ASTM Standards:
as modified in 3.1.3-3.1.6.
A 167 Specification for Stainless and Heat–Resisting Chro-
3.1.3 connector—the entire assembly including resilient
mium–Nickel Steel Plate, Sheet and Strip
seals and metallic or nonmetallic mechanical devices, if any,
C 478 Specification for Precast Reinforced Concrete Man-
used therein.
hole Sections
3.1.4 lateral—the small diameter pipe connected to the
main line pipe.
This specification is under the jurisdiction of ASTM Committee C13 on
3.1.5 pipe—the inlet or outlet pipe connected to the man-
Concrete Pipe and is the direct responsibility of Subcommittee C13.06 on Manholes
hole.
and Specials.
Current edition approved June 10, 2000. Published September 2000. Originally
published as C 923–79. Last previous edition C 923–98.
2 4
Annual Book of ASTM Standards, Vol 01.03. Annual Book of ASTM Standards, Vol 09.01.
3 5
Annual Book of ASTM Standards, Vol 04.05. Annual Book of ASTM Standards, Vol 08.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 923
3.1.6 pipe stub—a short section of pipe, installed in the provide a seal. Whichever design is used, it shall be capable of
structure as an inlet or outlet pipe, for future connection. maintaining a resilient, hydrostatic seal under the performance
conditions in accordance with Section 7. Devices used to effect
4. Materials and Manufacture
mechanical seals shall conform to the requirements specified in
Section 4.
4.1 All materials shall conform to the following require-
5.2 For lateral to pipe connectors, the design of the connec-
ments:
tor shall be such that a positive seal is accomplished at two
4.1.1 Resilient materials for connectors and filler rings shall
locations: (1) between the connector and the pipe wall and (2)
be manufactured from natural or synthetic rubber and shall
between the connector and the lateral. The seal between the
conform to the requirements prescribed in Table 1. If a splice
connector and the pipe wall may be made by either mechanical
is used in the manufacture of the seal, its strength shall be such
means, compression, or by casting the connector integrally
that the seal shall withstand a 180° bend with no visible
with the pipe wall. The seal between the connector and the
separation.
lateral may be made by either mechanical means or by
4.2 Mechanical Devices—Expansion rings, tension bands,
compression of the resilient material against the outside of the
and take-up devices used for mechanically compressing the
pipe. Resilient filler rings may be used between the lateral and
resilient portion of the connector against the pipe, manhole or
the connector to provide a seal. Connector design must not
wastewater structure shall be made from a material or materials
allow either lateral or connector to extend past the cylindrical
in combination that will ensure durability, strength, resistance
plane of the pipe inside diameter. The connector shall be
to corrosion, and have properties that will ensure continued
capable of maintaining a resilient hydrostatic seal under the
resistance to leakage. All metallic mechanical devices, includ-
performance conditions in accordance with Section 7. Devices
ing castings and bolt assemblies used to mechanically deform
used to effect mechanical seals shall conform to the require-
resilient materials shall be constructed of corrosion resistant
ments specified in Section 4.
materials meeting the physical properties and chemical com-
5.3 Purchaser shall require that all pipe stubs installed, to
position requirements of Specification A 167.
allow for future connection to the manhole or wastewater
NOTE 2—Experience has shown that successful performance of this
structure, be mechanically restrained from movement by
product depends on the type of bedding and b
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