T/SDAS 838-2024 Fused seamed flexible jointless prestressed welded steel pipes and fittings for direct buried insulation

Scope

Main technical content: This document specifies the terms and definitions, product structure, requirements, test methods, inspection rules, marking, transportation, and storage of prefabricated directly buried insulated steel pipes (hereinafter referred to as socket-and-sleeve insulated steel pipes) and insulation fittings, which are composed of an outer protective layer, an insulation layer, and socket-and-sleeve flexible interface working steel pipes. This document is applicable to socket-and-sleeve flexible interface prefabricated directly buried insulated steel pipes, fittings, and accessories with a nominal diameter range of DN100 to DN1600, a transmission medium temperature not exceeding 120°C, and an accidental peak temperature not exceeding 130°C.

Development Information

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