GB/T 44678-2024Ships and marine technology - Check valves for use in low temperature applications - Design and testing requirements (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is equivalent to ISO 20602:2019 "Ships and offshore technology - Design and test requirements for cryogenic check valves for marine use".

The following minimal editorial changes were made to this document.

--- Incorporates the amendments to ISO 20602:2019/Amd.1.2021.The outer margins of the clauses involved are indicated by vertical Double lines (||) are marked;

--- Corrected the typographical errors in the international standards and modified some standard names in Chapter 2;

--- Corrected the typographical errors in the international standards and modified the density of nitrogen in Table 1;

---NPS is changed to NPS(DN), see 5.3.2.3.2;

--- Corrected the typographical errors in the international standard and modified the corresponding chapter numbers of f), g) and h) in 8.8.3.

1 Scope

This document specifies the design, Manufacturing and testing requirements.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

Note. GB/T 12220-2015 Industrial valve marking (ISO 5209:1977, MOD) ISO 28921-1 Industrial valves - Isolation valves for cryogenic use - Part 1: Design, manufacture and product testing (Industrialvalves-ting) API594 flanged, lug, wafer and butt check valves welding ASMEB16.11 Forged Fittings, Socket-Welding and Threaded ASMEB16.34.2017 Valves-Flanged, Threads, and Welding End) ASMEB46.1 Surface Texture (Surface Roughness, Waviness and Pattern Direction) Roughness, Waviness, and Lay)] ASME BPVC Sec. VIII Div. 1..2018 Pressure Vessels temperatureService) Service, or Both)