HG 20585-1998
Technical regulation for steel low temperature pressure vessels (English Version)
- Standard No.
- HG 20585-1998
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Chemical Industry
- Status
- 2011-06
- Replace By
- HG/T 20585-2011
- Latest
- HG/T 20585-2011
- Scope
- 1.O.1 This regulation applies to steel cryogenic pressure vessels with a design pressure not greater than 35.0MPa and a design temperature equal to or lower than -20°C and not lower than -196°C for chemical industry. 1.O.2 Ferritic steel may cause low-stress brittle fracture when it is below a certain transformation temperature and has a considerable stress level and a sufficiently sharp notch (defect). In this regard, this regulation puts forward corresponding requirements in terms of materials, design, structure and manufacturing. 1.O.3 Low-temperature pressure vessels made of chromium-nickel austenitic steel, when the design temperature is not lower than -196°C, only need to meet the following requirements, and the rest are considered as normal temperature pressure vessels. 1 The base material should be standard chromium-nickel austenitic steel with a carbon content of less than or equal to 0.10%, such as OCr18Ni9, OOCr19Ni10, OCr18Ni10Ti, etc. 2 If casting materials are used, when the design temperature is less than -70°C, the austenitic cast steel should also be subjected to low-temperature Charpy impact test at the design temperature and comply with the requirements of Table 4-2. 3 Welding materials and processes should meet the following requirements: (1) The carbon content of the weld metal is less than or equal to 0.10%. (2) The chemical composition of the weld metal should comply with the requirements of E308, E308L, E309 in GB 983 "Stainless Steel Welding Rods" and HOCr21Ni1O, HOOCr21Nil0, and HOCr26Ni21 in GB 4233 and 4242 "Stainless Steel Wire for Welding". (3) When the design temperature is less than -70°C for welding process qualification, a low-temperature impact test of the weld metal should be carried out and comply with the requirements of Table 4-2. 4 The degree of cold working deformation shall comply with the provisions of Clause 3 of Article 6.2.2. 1.O.4 This regulation only applies to the low-temperature pressure vessel itself, pressure components (including pipes, flanges and fasteners, etc.) and non-pressure components directly welded to low-temperature pressure components. Non-low temperature pressure components and those that are exposed to low temperatures but are not pressure components and are not directly welded to pressure components do not need to comply with this regulation. 1.O.5 In addition to the relevant requirements of these regulations, the design of cryogenic pressure vessels should also comply with the corresponding requirements of the following standards.
HG 20585-1998 history
- 2011 HG/T 20585-2011 Technical specification for steel low temperature pressure vessels
- 1970 HG 20585-1998 Technical regulation for steel low temperature pressure vessels
HG 20585-1998 Technical regulation for steel low temperature pressure vessels was changed to HG/T 20585-2011 Technical specification for steel low temperature pressure vessels.
