GB/T 27572-2011 Rubber seals—Joint rings for pipelines for hot-water supply up to 110 ℃—Specification for the materials

Scope

This standard specifies the material requirements for sulfurized rubber sealing rings used in drinking and non-drinking hot water (up to 110℃) supply pipelines. The identification codes for various sealing rings specified in this standard are determined based on the type, use, and requirements of the sealing rings (see Table 3). This standard also sets general requirements for finished sealing rings. Additional requirements for special purposes should be specified in the corresponding product standards. It should be noted that the working performance of pipe joints is related to the performance of sealing ring materials, the geometric shape of sealing rings, and the structure of pipe joints. Where applicable, this standard should be used in conjunction with product standards that specify the working performance of pipe joints. This standard applies to all pipe joint sealing rings, including cast iron pipes, steel pipes, ceramic pipes, asbestos-cement pipes, cement pipes, reinforced cement pipes, plastic pipes, and fiberglass-reinforced plastic pipes. This standard applies to the elastomeric parts of composite or non-composite sealing rings. For composite sealing rings made of materials with a hardness range of 76 IRHD to 95 IRHD, the requirements for tensile elongation, compression permanent deformation, and stress relaxation only apply when the materials participate in the sealing process or when long-term stability of the sealing rings is required. This standard does not apply to interface sealing rings made of porous rubber materials or closed-cell materials as part of their structure.

Development Information

Superseded by the following standards

Referenced Standards

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