ASTM C923/C923M-20 PDF Download

ASTM C923/C923M-20 is a standard specification that outlines the requirements for resilient connectors used between reinforced concrete manhole structures, pipes, and laterals. The connectors are designed to minimize leakage between the different components of the system.

The standard specifies that the resilient materials for connectors and filler rings should be made from natural or synthetic rubber and should meet the prescribed requirements. Mechanical devices used in the connectors should be made from materials that ensure durability, strength, corrosion resistance, and continued resistance to leakage.

The specification also provides guidelines for the design of pipe connectors and pipe stubs. It sets forth the physical properties and chemical composition that must conform to the required tests, including chemical resistance, tensile strength, elongation at break, hardness, accelerated oven-aging, compression set, water absorption, ozone resistance, low-temperature brittle point, and tear resistance.

It's important to note that this specification covers the design, material, and performance of the resilient connection only. It states that the connections covered by this specification are suitable for hydrostatic pressures up to 13 psi (30 ft) [90 kPa (9.1 m)] without leakage. However, the infiltration or exfiltration quantities in an installed system depend on various factors other than the connections themselves, and must be addressed by other specifications and suitable testing of the pipeline and system as a whole.