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GB/T 17396-2022: Seamless hot-rolled steel tubes for hydraulic pillar service Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 17396: Historical versions
Similar standardsGB/T 17396-2022: Seamless hot-rolled steel tubes for hydraulic pillar service---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/GBT17396-2022GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.75 CCS H 48 Replacing GB/T 17396-2009 Seamless hot-rolled steel tubes for hydraulic pillar service Issued on. OCTOBER 12, 2022 Implemented on. MAY 01, 2023 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 7 4 Order content... 7 5 Size, shape, weight and allowable deviation... 8 6 Technical requirements... 10 7 Test methods... 14 8 Inspection rules... 15 9 Packaging, marking and quality certificate... 16ForewordThis document was drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents. This document replaces GB/T 17396-2009 Hot-rolled seamless steel tubes for hydraulic pillar service; compared with GB/T 17396-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Change the allowable deviation of outer diameter and wall thickness (see 5.2; 4.2 of the 2009 edition); b) Change the usual length requirements (see 5.4.1; 4.4.1 of the 2009 edition); c) Change the allowable deviation requirements for specific length and multiple length (see 5.4.2.2; 4.4.2 of the 2009 edition); d) Change the requirements for the curvature in total length (see 5.5.2; 4.5.2 of the 2009 edition); e) Change the weight requirements (see 5.8; 4.7 of the 2009 edition); f) Delete the designation 20, add the designations 27SiMnRE, 30CrMnSi, 30CrMo (see Table 2; Table 2 of the 2009 edition); g) Change the P and S composition requirements of all designations, and change the rare earth content requirements of 30MnNbRE (see Table 2; Table 2 of the 2009 edition); h) Change the smelting method of steel (see 6.2.1; 5.2.1 of the 2009 edition); i) Add the manufacturing method of the tube blank (see 6.2.2); j) Add the mechanical property requirements for the designations 27SiMnRE, 30CrMnSi, and 30CrMo (see 6.4); k) Delete the requirements on the reduction of area in the mechanical properties (see Table 3 of the 2009 edition); l) Change the impact requirements (see 6.4.3; 5.4.4 of the 2009 edition); m) Change the inspection requirements for non-metallic inclusions (see 6.6; 5.6 of the 2009 edition); n) Add non-destructive testing requirements (see 6.8); o) Change the batching rules (see 8.2.3; 7.2.3 of the 2009 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying patents. This document was proposed by China Iron and Steel Industry Association. This document shall be under the jurisdiction of National Technical Committee 183 on Iron and Steel of Standardization Administration of China (SAC/TC 183). Drafting organizations of this document. Linzhou Fengbao Pipe Co., Ltd., Hunan Valin Hengyang Steel Tube (Group) Co., Ltd., Zhejiang Pacific Seamless Steel Tube Co., Ltd., Inner Mongolia BaoTou Steel Union Co., Ltd., Zhengzhou Coal Mining Machinery Group Co., Ltd., Changsha Dalishen Hydraulic Engineering Co., Ltd., Shandong Huitong Steel Tube Manufacturing Co., Ltd., Jiangyin Huarun Steel Co., Ltd., China Metallurgical Information and Standardization Institute. Chief drafting staffs of this document. Li Jingmin, Xiao Yongzhong, Song Guangxin, Liu Hong, Mi Yongfeng, Guo Yukun, Jiang Hongwei, Liu Lianhui, Gu Yuping, Li Qi, Xiang Peng, Zhou Yong, Bai Binheng, Zhu Hongbo, Wang Wenqiang, Wang Shiming, Xue Jianzhong. This document was published in 1998 for the first time, and revised in 2009 for the first time; this is the second revision. Seamless hot-rolled steel tubes for hydraulic pillar service1 ScopeThis document specifies the order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of seamless hot-rolled steel tubes for hydraulic pillar service. This document applies to the seamless hot-rolled steel tubes for cylinders and pillars used in the manufacture of coal mine hydraulic support cylinders and pillars. It also applies, as a reference, to seamless hot-rolled steel tubes for other hydraulic cylinders and pillars.2 Normative referencesThe following documents are normatively referenced in this document and are indispensable for its application. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document. GB/T 222, Permissible tolerances for chemical composition of steel products GB/T 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric 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 223.19, 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 method3 Terms and definitionsTerms and definitions determined by GB/T 30062 are applicable to this document.4 Order contentA contract or order for ordering steel tubes under this document shall include, but not be limited to, the following.5 Size, shape, weight and allowable deviation5.1 Outer diameter and wall thickness The nominal outer diameter (D) and nominal wall thickness (S) of the steel tube shall comply with the provisions of GB/T 17395.According to the requirements of the buyer and after negotiation between the supplier and the buyer, steel tubes of other outer diameters and wall thicknesses can be supplied. 5.3 Inner diameter and wall thickness As required by the buyer, after it is negotiated between the supplier and the buyer, and indicated in the contract, steel tubes can be supplied according to the inner diameter and wall thickness, where the allowable deviation shall be determined by the supplier and the buyer through negotiation. 5.4 Length 5.4.1 Normal length The normal length of the steel tube is 3 000 mm ~ 12 000 mm. According to the requirements of the buyer and after negotiation between the supplier and the buyer, steel tubes of a length other than the normal length can be supplied. 5.4.2 Specific length and multiple length 5.5 Curvature The curvature per meter of the steel tube shall not be greater than the following. 5.5.2 The full-length curvature of the steel tube shall not exceed 0.10% of the length of the steel tube. 5.6 Out-of-roundness and wall unevenness As required by the buyer, after it is negotiated between the supplier and the buyer and indicated in the contract, the out-of-roundness and wall unevenness of the steel tube shall not exceed 80% of the outer diameter tolerance and wall thickness tolerance respectively. 5.7 End shape The end faces of the steel tube shall be perpendicular to the axis of the steel tube; the burrs of the cut shall be removed. 5.8 Weight6 Technical requirements6.1 Steel designation and chemical composition 6.1.1 The steel designation and chemical composition (melting analysis) shall comply with the requirements in Table 2.As required by the buyer, after it is negotiated between the supplier and the buyer, and indicated in the contract, steel tubes of other designations can be supplied. 6.2 Manufacturing method 6.2.1 Smelting method of steels Steels shall be smelted by the method of electric arc furnace plus out-of-furnace refining or oxygen converter plus out-of-furnace refining. After negotiation between the supplier and the buyer, other methods of higher requirements can be used for smelting. 6.3 Delivery state Steel tubes shall be delivered in hot rolled state. As required by the buyer, after it is negotiated between the supplier and the buyer and specified in the contract, the steel tubes can be delivered in the annealed or quenched and tempered state. 6.4 Mechanical properties 6.4.1 Tensile 6.4.3 Shock 6.4.3.1 For structural alloy steel tubes, when the outer diameter is not less than 70 mm and the wall thickness is not less than 6.5 mm, a longitudinal impact test at room temperature shall be carried out, and the Charpy V-notch impact absorbed energy of the test sample made of the sample blank after heat treatment shall meet the requirements in Table 3. 6.4.3.3 As required by the buyer, after it is negotiated between the supplier and the buyer and specified in the contract, steel tubes of other designations can be subjected to the Charpy V (U) notch impact test, and the test temperature and impact absorbed energy shall be determined through negotiation between the supplier and the buyer. 6.5 Macro-structure Steel tubes directly rolled from steel ingots shall be inspected for macro-structure defects. There shall be no visible white spots, inclusions, subcutaneous bubbles, skull patch and delamination on the cross-sectional acid-leached macro-structure test pieces of steel tubes. 6.7 Surface quality There shall be no laps, rolling wrinkles, scrabs and abscission layers on the inner and outer surfaces of steel tubes. These defects shall be completely removed; the removal depth shall not exceed the lower deviation of the nominal wall thickness, and the actual outer diameter and wall thickness of the cleaned place shall not be less than the minimum value allowed by the outer diameter and wall thickness. Other local imperfections that do not exceed the allowable lower deviation of wall thickness are allowed to exist. 6.8 Non-destructive testing As required by the buyer, after it is negotiated between the supplier and the buyer and specified in the contract, the steel tube can be non-destructively tested in one or more of the following methods.7 Test methods7.1 Sampling for chemical composition analysis of steel tubes shall comply with the rules of GB/T 20066.The chemical composition analysis usually complies with the provisions of GB/T 4336, GB/T 20123 or other general methods, and the arbitration shall comply with GB/T 223.5, GB/T 223.11, GB/T 223.12, GB/T 223.19, GB/T 223.23, GB/T 223.26, GB/T 223.40, GB/T 223.49, GB/T 223.59, GB/T 223.63, GB/T 223.85 and GB/T 223.86. 7.2 The size and shape of the steel tubes shall be measured one by one by gauges that meet the accuracy requirements. 7.3 The inner and outer surfaces of steel tubes shall be inspected visually under full lighting conditions.8 Inspection rules8.1 Inspection and acceptance The inspection and acceptance of steel tubes shall be carried out by the supplier’s quality and technical supervision department. 8.2 Batch rules 8.2.1 Steel tubes shall be inspected and accepted in batches. 8.3 Sampling quantity The sampling quantity for each inspection of each batch of steel tubs shall meet the requirements of Table 6. 8.4 Re-inspection and determination rules The re-inspection and determination rules of steel tubes shall comply with the provisions of GB/T 2102.9 Packaging, marking and quality certificateThe packaging, marking and quality certificate of steel tubes shall comply with the provisions of GB/T 2102. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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