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GB 3531-2014: [GB/T 3531-2014] Steel plates for low temperature pressure vessels Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete GB 3531: Historical versions
GB 3531-2014: [GB/T 3531-2014] Steel plates for low temperature pressure vessels---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB3531-2014GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.50 H 46 Replacing GB 3531-2008 Steel plates for low temperature pressure vessels Issued on: JUNE 24, 2014 Implemented on: APRIL 1, 2015 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Order content ... 6 4 Expression of designation ... 7 5 Size, shape, weight and allowable deviation ... 7 6 Technical requirements ... 7 7 Test methods ... 11 8 Inspection rules ... 12 9 Packaging, marks and quality certificate ... 13 10 Rounding off of numerical value ... 13ForewordSub-clauses 5.1.2, 6.4.4, 6.5.2, 8.3 of this Standard are recommendatory; the rest are mandatory. This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB 3531-2008 Low alloy steel plates for low temperature pressure vessels. Compared with GB 3531-2008, the main technical modifications are as follows. - modified the standard’s name to “Steel plates for low temperature pressure vessels”; - added three designations. 15MnNiNbDR, 08Ni3DR and 06Ni9DR; - tightened the control of phosphorus, sulfur (the harmful elements) in steel; - improved the low temperature impact absorption energy of each designation. This Standard was proposed by China Iron and Steel Industry Association. This Standard shall be under the jurisdiction of National Technical Committee on Steels of Standardization Administration of China (SAC/TC 183). Main drafting organizations of this Standard. Chongqing Iron & Steel Co., Ltd., Metallurgical Industry Information Standards Institute, China General Machinery Engineering Corporation, Hunan Valin Xiangtan Iron and Steel Co., Ltd., Wuhan Iron and Steel (Group) Company, Nanjing Iron and Steel Co., Ltd. Main drafters of this Standard. Du Dasong, Wang Shaobin, Wang Xiaohu, Qin Xiaozhong, Ren Cuiying, Liu Jianbing, Li Shurui, Chu Juefei, Xie Chaozhong, Li Xiaoli, Ye Guohua, Ding Qingfeng, Huo Songbo, Wang Xin, Gao Yan. Versions of standard substituted by this Standard are. - GB 3531-1983, GB 3531-1996, GB 3531-2008. Steel plates for low temperature pressure vessels1 ScopeThis Standard specifies the order content, expression method of designation, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marks and quality certificate of steel plates for low temperature pressure vessels. This Standard is applicable to the steel plates of which the thickness is 5 mm ~ 120 mm for production of -196°C ~ < -20°C low temperature pressure vessels.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 222, Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223.3, Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.9, Iron steel and alloy - Determination of aluminium content - Chrom azurol S photometric method GB/T 223.11, Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method GB/T 223.12, Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content GB/T 223.14, Methods for Chemical Analysis of Iron, Steel and Alloy - The N-Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content GB/T 223.17, Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane photometric method for the determination of titanium content GB/T 223.19, Methods for chemical analysis of iron, steel and alloy - The neocuproine-chloroform extraction photometric method for the determination of copper content GB/T 223.23, Iron, Steel and Alloy-Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method GB/T 223.26, Iron, Steel and Alloy - Determination of Molybdenum Content - The Thiocyanate Spectrophotometric Method GB/T 223.40, Iron, Steel and Alloy - Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method GB/T 223.49, Methods for chemical analysis of iron, steel and alloy - Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare earth content GB/T 223.53, Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of copper content GB/T 223.54, Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of nickel content GB/T 223.60, Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content GB/T 223.62, Methods for chemical analysis of iron, steel and alloy - The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.63, Methods for chemical analysis of iron, steel and alloy - The sodium(potassium)periodate photometric method for the determination of manganese content GB/T 223.68, Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content GB/T 223.69, Iron, Steel and Alloy-Determination of Carbon Contents - Gas-volumetric Method after Combustion in the Pipe Furnace GB/T 223.76, Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of a) reference to this Standard; b) product name; c) designation; d) delivery state; e) size; f) weight; g) additional technical requirements (e.g. ultrasonic testing, etc.).4 Expression of designationThe steel designation is expressed by average carbon content, alloy element letter and "D" (the first letter of Di, meaning “low” in Chinese) and "R" (the first letter of Rong, meaning “capacity” in Chinese) of low temperature pressure vessel. Example. 16MnDR.5 Size, shape, weight and allowable deviation5.1 The size, shape and allowable deviation of steel plate shall comply with the provisions of GB/T 709-2006. 5.1.1 The allowable thickness deviation of steel plate shall be in accordance with B-type requirements of GB/T 709-2006. As required by the purchaser, indicated in the contract, the steel plate that complies with C-type deviation of GB/T 709-2006 shall be supplied. 5.1.2 As required by the purchaser, agreed by the supplier and the purchaser, the steel plate of stricter deviation may be supplied. 5.2 The steel sheet is delivered by theoretical weight. The thickness used by theoretical weight is the arithmetic mean of the allowable maximum thickness and the minimum thickness of steel plate. The 06Ni9DR density is 7.89 g/cm3. The density of other steel is 7.85 g/cm3.6 Technical requirements6.1 Designation and chemical composition 6.1.1 The steel designation and chemical composition (smelting the low temperature impact absorption energy of the steel plate can be delivered at a value higher than that of Table 2. Specific values are stated in the contract. 6.4.5 When the supplier ensures the bending qualified, the bending test shall be exempted. 6.5 Ultrasonic testing 6.5.1 The supplier for steel plate delivered in normalizing or normalizing plus tempering status of which the thickness is greater than 20 mm as well as the steel plate delivered in quenching plus tempering status of which the thickness is greater than 16 mm shall carry out the ultrasonic testing one by one. 6.5.2 Agreed by both parties, the steel plate of other thickness may be subject to the ultrasonic testing one by one. 6.5.3 Ultrasonic testing standards shall be carried out according to JB/T 4730.3, GB/T 2970 or GB/T 28297. The inspection standards and the qualification levels shall be indicated in the contract. 6.6 Surface quality 6.6.1 The surface of the steel plate does not allow the presence of cracks, bubbles, scarring, folding and defects harmful on the use. Steel plates must not be layered. If there are defects mentioned above, cleaning is allowed. The cleaning depth is calculated from the actual size of the steel plate. It shall not be greater than half the thickness of the steel plate. And it shall ensure the minimum thickness of the steel plate at the clean... ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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