T/GDSS 002-2018 Active Group standards

T/GDSS 002-2018 Stainless steel pipes and double-sealing fittings

Publish Date: 2018-05-02 Implement Date: 2018-06-15 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/GDSS 002-2018

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Piping accessories

ICS Name: Flanges, pipe joints, and connectors

Publish Date: 2018-05-02

Implement Date: 2018-06-15

Scope

Scope: This standard specifies the terms and definitions, marking, materials, specifications and dimensions, requirements and test methods, inspection rules, labeling, packaging, transportation, and storage of stainless steel pipes (hereinafter referred to as steel pipes) and double compression fittings (hereinafter referred to as fittings). This standard applies to stainless steel pipes and fittings used for connecting drinking water, domestic water, cold water, hot water, and fire-fighting water with a nominal size not exceeding DN100 and a nominal pressure not exceeding 2.5 MPa; medical gases with a nominal pressure not exceeding 0.8 MPa; negative pressure and compressed air; and gas with a nominal pressure not exceeding 0.4 MPa. Main technical content: This standard is developed based on the application of stainless steel pipelines. It is applicable to the design, manufacture, and acceptance of double compression fittings and pipes used for connecting stainless steel pipelines with a nominal size not exceeding DN100 and a nominal pressure not exceeding 2.5 MPa for drinking water, domestic water, cold water, hot water, seawater, and fire-fighting; medical gases with a nominal pressure not exceeding 0.8 MPa; negative pressure and compressed air; and gas with a nominal pressure not exceeding 0.4 MPa. For the first time, it proposes the use of national standards S12362 (019Cr23MoTi) and S12361 (019Cr23Mo2Ti) as alternative materials to improve the applicability of double compression fittings and stainless steel pipes in high-corrosive environments such as hot water and gas. It adds control points for the wall thickness of fittings to meet the requirements of compression performance. It also increases the structural dimensions of fittings to lay a foundation for the consistency of the compression clamping jaws of tools. It enhances the requirements for the connection performance tests of fittings.