ASTM F2946-12

Standard Specification for PVC Hub and Elastomeric Seal (Gasket) Tee Connection for Joining Plastic Pipe to Insitu Pipelines and Manholes

ABSTRACT
This specification covers the minimum performance and material requirements for a three piece tee connector for connection between plastic pipe and insitu pipes, manholes and wastewater structures in sanitary and storm sewer applications. The three piece seal system consists of a 4 through 30-in. PVC (polyvinyl chloride) hub pipe, an elastomeric seal (gasket) and a mechanical band. The system is installed in either a bored or cast hole opening in the host pipe or structure to a specific dimension that corresponds to the combined diameter of the PVC pipe outside diameter/tolerance and the elastomeric seal thickness. These tee connectors are designed to provide a non-pressure (gravity flow) watertight connection between the incoming pipe and an insitu pipe or manhole/structure to the limits defined in this standard. This specification deals with materials and manufacture, principles of design, basis of acceptance, test methods and requirements, rejection and rehearing, certification, markings, quality assurance, and packaging and package marking.
SCOPE
1.1 This specification covers the minimum performance and material requirements for a three piece tee connector for connection between plastic pipe and insitu pipes, manholes and wastewater structures in sanitary and storm sewer applications.  
1.1.1 The three piece seal system consists of a 4 through 30-in. PVC (polyvinyl chloride) hub pipe, an elastomeric seal (gasket) and a mechanical band (Fig. 1). The system is installed in either a bored or cast hole opening in the host pipe or structure to a specific dimension that corresponds to the combined diameter of the PVC pipe outside diameter/tolerance and the elastomeric seal thickness.
FIG. 1 Three-Piece Sealing System (Connector)  
1.2 These tee connectors are designed to provide a non-pressure (gravity flow) watertight connection between the incoming pipe and an insitu pipe or manhole/structure to the limits defined in this standard.Note 1—Connections covered by this specification are adequate for laboratory hydrostatic pressures up to 13 psi (30 ft of head) without leakage when tested in accordance with the provisions of this standard. Infiltration or exfiltration quantities for an installed system are dependent upon many factors other than the connections between incoming pipe and the insitu pipe or manhole structure, and allowable quantities may need to be covered by other specifications and suitable testing of the installed pipeline and system. Where connections are made to concrete manhole sections refer to Specification C923.Note 2—These connectors are not resilient connectors, and as such, allow for only a limited amount of lateral movement due to the tight compression seal between the PVC hub and insitu pipe/structure. Since these connectors are not rigid fittings, a significant amount of axial movement can be accommodated, but the degree of intrusion into the host pipe/structure must be regulated to minimize the impact on flow characteristics or hydraulic design conditions.  
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 Section 7.

General Information

• Status: Historical
• Publication Date: 31-Jul-2012
• ICS: 23.040.80 - Seals for pipe and hose assemblies
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.20 - Joining

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:F2946 −12 An American National Standard
Standard Specification for
PVC Hub and Elastomeric Seal (Gasket) Tee Connection for
Joining Plastic Pipe to Insitu Pipelines and Manholes
This standard is issued under the fixed designation F2946; 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.
1. Scope 2. Referenced Documents
1.1 This specification covers the minimum performance and 2.1 ASTM Standards:
material requirements for a three piece tee connector for A493 Specification for Stainless Steel Wire and Wire Rods
connectionbetweenplasticpipeandinsitupipes,manholesand for Cold Heading and Cold Forging
wastewater structures in sanitary and storm sewer applications. A666 Specification forAnnealed or Cold-WorkedAustenitic
1.1.1 The three piece seal system consists of a 4 through Stainless Steel Sheet, Strip, Plate, and Flat Bar
30-in. PVC (polyvinyl chloride) hub pipe, an elastomeric seal C822 Terminology Relating to Concrete Pipe and Related
(gasket)andamechanicalband(Fig.1).Thesystemisinstalled Products
in either a bored or cast hole opening in the host pipe or C923 Specification for Resilient Connectors Between Rein-
structure to a specific dimension that corresponds to the forced Concrete Manhole Structures, Pipes, and Laterals
combined diameter of the PVC pipe outside diameter/tolerance D1566 Terminology Relating to Rubber
and the elastomeric seal thickness. D1785 Specification for Poly(Vinyl Chloride) (PVC) Plastic
Pipe, Schedules 40, 80, and 120
1.2 These tee connectors are designed to provide a non-
D2665 Specification for Poly(Vinyl Chloride) (PVC) Plastic
pressure (gravity flow) watertight connection between the
Drain, Waste, and Vent Pipe and Fittings
incoming pipe and an insitu pipe or manhole/structure to the
D3034 Specification for Type PSM Poly(Vinyl Chloride)
limits defined in this standard.
(PVC) Sewer Pipe and Fittings
NOTE 1—Connections covered by this specification are adequate for
F412 Terminology Relating to Plastic Piping Systems
laboratory hydrostatic pressures up to 13 psi (30 ft of head) without
leakage when tested in accordance with the provisions of this standard.
F477 Specification for Elastomeric Seals (Gaskets) for Join-
Infiltration or exfiltration quantities for an installed system are dependent
ing Plastic Pipe
upon many factors other than the connections between incoming pipe and
F679 Specification for Poly(Vinyl Chloride) (PVC) Large-
the insitu pipe or manhole structure, and allowable quantities may need to
Diameter Plastic Gravity Sewer Pipe and Fittings
be covered by other specifications and suitable testing of the installed
F1417 Practice for Installation Acceptance of Plastic Non-
pipeline and system. Where connections are made to concrete manhole
sections refer to Specification C923.
pressure Sewer Lines Using Low-Pressure Air
NOTE 2—These connectors are not resilient connectors, and as such,
F2487 Practice for Infiltration and Exfiltration Acceptance
allow for only a limited amount of lateral movement due to the tight
Testing of Installed Corrugated High Density Polyethyl-
compression seal between the PVC hub and insitu pipe/structure. Since
ene and Polypropylene Pipelines
these connectors are not rigid fittings, a significant amount of axial
movement can be accommodated, but the degree of intrusion into the host
2.2 AWWA Standard:
pipe/structure must be regulated to minimize the impact on flow charac-
C900 Polyvinyl Chloride (PVC) Pressure Pipe and Fabri-
teristics or hydraulic design conditions.
cated Fittings, 4 in. Through 12 in. (100 mm Through 300
1.3 The following precautionary caveat pertains only to the
mm), for Water Transmission and Distribution
test methods portion, Section 7, of this specification: This
standard does not purport to address all of the safety concerns, 3. Terminology
if any, associated with its use. It is the responsibility of the user
3.1 Definitions:
of this standard to establish appropriate safety and health
3.1.1 Terms relating to plastics and rubber shall be as
practices and determine the applicability of regulatory limita-
defined in Terminologies F412 and D1566, respectively.
tions prior to use. For a specific precaution statement, see
Section 7.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
This test method is under the jurisdiction of ASTM Committee F17 on Plastic Standards volume information, refer to the standard’s Document Summary page on
Piping Systems and is the direct responsibility of Subcommittee F17.20 on Joining. the ASTM website.
Current edition approved Aug. 1, 2012. Published September 2012. DOI: Available fromAmerican Water WorksAssociation (AWWA), 6666 W. Quincy
10.1520/F2946–12 Ave., Denver, CO 80235, http://www.awwa.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2946−12
FIG. 1Three-Piece Sealing System (Connector)
3.1.2 Terms relating to precast concrete pipe, manholes, and The minimum torque requirement for securing the band around
related products shall be as defined in Terminology C822. the PVC hub shall be 60 in-lbs.
3.2 Definitions of Terms Specific to This Standard:
4.3 PVC Hubs—PVC pipe and joint sections that constitute
3.2.1 connector, n—the entire assembly including pipe hub, the hub component of this system shall be fabricated from pipe
elastomeric seal and mechanical band.
and joint that meet the requirements of either Specification
D1785, D2665, D3034, F679 or AWWA C900.
3.2.2 insitu, adj—reflects the condition of the pipe, manhole
NOTE 3—Experience has shown that successful performance of this
orwastewaterstructurethatservesasthehosttotheconnector.
product depends on the type of bedding and backfill and the care in the
These facilities are existing structures that has been excavated
field installation of the manhole or wastewater structure and connecting
for the purposes of tapping or connecting into the line.
pipes. The owner is cautioned that field inspection at the construction site
may be necessary.
3.2.3 mechanical band, n—metallic or nonmetallic me-
chanical device used for compressing an elastomeric seal
5. Principles of Design
againstapipe’soutsidediameterwall,typicallyastainlesssteel
worm screw clamp.
5.1 The design of the connector shall be such that positive
3.2.4 pipe hub, n—a short section of pipe used to made a seal is accomplished at two locations: (1) between the elasto-
meric seal and the wall of the insitu pipe, manhole or
watertight connection to the incoming pipeline. This pipe hub
is typically made from the same pipe material and meeting the wastewater structure and (2) between the elastomeric seal and
the pipe hub. The watertight seal between the insitu pipe,
same ASTM standard as the incoming pipeline.
manhole or waste water structure is made by the compression
4. Materials and Manufacture
of the gasket between the insitu structure and the pipe hub.
5.1.1 The seal between the connector and the wall of the
4.1 All materials shall conform to the following require-
insitu pipe, manhole or wastewater structure shall be made by
ments:
mechanical means, compression of the elastomeric seal be-
4.1.1 Elastomeric Seals—Gasket materials for connectors
tweentheoutsidesurfaceofthepipehubandtheopeninginthe
shall meet the requirements of F477.
wall of the insitu pipe, manhole or wastewater structure.
4.2 Mechanical Device or Band—Take-up devices used for
5.1.2 The seal between the connector and the pipe hub shall
mechanically compressing the resilient portion of the connec-
be made by mechanical means by compression of the elasto-
tor against the pipe, manhole or wastewater structure shall be
meric material against the outside of the pipe hub with a
made from a material or materials in combination that will
mechanical devise or band. Devices used to effect mechanical
ensure durability, strength, resistance to corrosion, and have
seals shall conform to the requirements specified in Section 4.
properties that will ensure continued resistance to leakage. All
metallic mechanical devices, including castings and bolt as- 5.2 All pipe stubs installed shall allow for future connection
semblies used to mechanically deform elastomeric seals shall to the insitu pipe, manhole or wastewater structure, and be
be constructed of corrosion resistant mater
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