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GB/T 8163-2018: Seamless steel pipes for liquid 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 8163: Historical versions
GB/T 8163-2018: Seamless steel pipes for liquid 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/GBT8163-2018GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.75 H 48 Replacing GB/T 8163-2008 Seamless steel pipes for liquid service Issued on. MAY 14, 2018 Implemented on. FEBRUARY 1, 2019 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Order content... 7 4 Size, shape and weight... 8 5 Technical requirements... 11 6 Test methods... 18 7 Inspection rules... 19 8 Packaging, marks and quality certificate... 20 Annex A (normative) Galvanized layer... 211 ScopeThis Standard specifies the order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of seamless steel pipes for liquid service. This Standard is applicable to the seamless steel pipes for ordinary liquid service.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 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method GB/T 223.9, Iron steel and alloy - Determination of aluminum 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 223.19, 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 Order contentContracts or orders for ordering steel pipes in accordance with this Standard shall include the following information. a) reference to this Standard; b) product name; c) steel designation, quality grade shall include quality grade; d) size specifications; e) quantity ordered (total weight or total length);4 Size, shape and weight4.1 Outer diameter and wall thickness The nominal outer diameter D and the nominal wall thickness S of the steel pipe shall comply with the provisions of GB/T 17395.According to the requirements of the purchaser, other steel pipes of outer diameter and wall thickness can be supplied through negotiation between the supplier and the purchaser. 4.2 Allowable deviation of outer diameter and wall thickness 4.2.1 The allowable deviation of the outer diameter of the steel pipe shall comply with the requirements of Table 1. 4.3 Length 4.3.1 Normal length The normal length of steel pipe is 3000mm~12000mm. According to the requirements of the purchaser, the steel pipe outside the normal length can be supplied through negotiation between the supplier and the purchaser. 4.3.2 Range length According to the requirements of the purchaser, after negotiation between the supplier and the purchaser, and indicated in the contract, the steel pipe can be delivered according to the range length. 4.3.3 Fixed length and multiple length 4.3.3.1 According to the requirements of the purchaser, after negotiation between the supplier and the purchaser, and indicated in the contract, the steel pipe can be delivered according to a fixed length or multiple length. 4.3.3.2 When the steel pipe is delivered in a fixed length or multiple length, the length tolerance shall comply with the following provisions. 4.3.3.3 After negotiated between the supplier and the purchaser, other steel pipes with other allowable deviation of the length can be supplied. 4.4 Curvature 4.4.1 The curvature per meter of steel pipe shall comply with the requirements of Table 4. 4.4.2 The full-length curvature of the steel pipe shall not exceed 0.15% of the total length of the steel pipe. 4.5 Un-roundness and uneven wall thickness According to the requirements of the purchaser, the supplier and the purchaser shall negotiate and indicate in the contract that the un-roundness and wall thickness of the steel pipe shall not exceed 80% of the nominal outer diameter tolerance and the nominal wall thickness tolerance respectively. 4.6 Tip shape 4.7 Weight 4.7.1 Steel pipes are delivered either according to actual weight or according to theoretical weight. The theoretical weight of steel pipe is calculated according to the provisions of GB/T 17395, 4.7.2 According to the requirements of the purchaser, the supplier and the purchaser shall negotiate and indicate in the contract that the allowable deviation of the actual weight of the delivered steel pipe from the theoretical weight shall comply with the following provisions.5 Technical requirements5.1 Steel designation and chemical composition 5.1.1 The steel pipe is made of steels with designations of 10, 20, Q345, Q390, Q420 and Q460. 5.1.2 The chemical composition (melting analysis) of steels with designations of 10 and 20 shall comply with the requirements of Table 5. 5.1.3 The chemical composition (melting analysis) and carbon equivalent of the steels with designations of Q345, Q390, Q420 and Q460 shall comply with the requirements of Table 6.According to the requirements of the purchaser, steel pipes of other designations or chemical compositions may be supplied through negotiation between the supplier and the purchaser. 5.1.4 When the purchaser requests to do the finished product analysis, it shall be indicated in the contract. The chemical composition allowable deviation of the finished steel pipe shall comply with the provisions of GB/T 222. 5.2 Manufacturing method 5.2.1 Steel smelting method Steel shall be smelted by electric arc furnace plus furnace refining or oxygen converter plus furnace refining method. After negotiation between the supplier and the purchaser, other methods of higher requirements may also be used for smelting. When the purchaser specifies a certain smelting method, it shall be indicated in the contract. 5.3 Delivery status 5.3.1 Hot rolled (expanded) steel pipes can be delivered in hot rolled (expanded) or heat treated condition. When the purchaser requests the heat treatment status, it shall be indicated in the contract. 5.3.2 Cold drawn (rolled) steel pipes shall be delivered in an annealed or high temperature tempered condition. 5.4 Mechanical properties 5.4.1 Tensile properties The longitudinal tensile properties of the steel pipe in the delivery status shall comply with the requirements of Table 7. 5.4.2 Impact 5.4.2.1 The quality grades for steel pipes with designations of Q345, Q390, Q420, Q460 are B, C, D, E. 5.4.2.2 The impact absorption energy in Table 7 is the Charpy V-notch impact absorption energy requirement value of the standard size sample. When the size of the steel pipe cannot prepare a standard size sample, a small size sample can be prepared. When using small-sized impact sample, the minimum Charpy V-notch impact energy requirements shall be the standard-size sample impact energy requirements multiplied by the decreasing factor in Table 8.The size of the impact sample shall be preferentially selected to a larger size. 5.5 Process performance 5.5.1 Flattening For 10, 20, Q345, Q390 designations of steel pipes with an outer diameter greater than 22mm~600mm and a wall thickness to outer diameter ratio of not more than 10%, the flattening test shall be carried out. Flattening test plate spacing H is calculated according to formula (1). 5.5.2 Flaring According to the requirements of the purchaser, the supplier and the purchaser shall negotiate and indicate in the contract that 10, 20 and Q345 designations of steel pipes with an outer diameter of not more than 76 mm and a wall thickness of not more than 8 mm may be subject to the flaring test. 5.5.3 Bending According to the requirements of the purchaser, after negotiation between the supplier and the purchaser, and indicated in the contract, the steel pipe with an outer diameter of not more than 22mm can be bent. 5.6 Hydraulic pressure 5.6.1 Steel pipes shall be hydraulically tested one by one. The test pressure is calculated according to formula (2). The maximum test pressure does not exceed 19.0MPa. Under the test pressure, the voltage regulation time shall be no less than 5s, and the steel pipe shall not leak. 5.7 Surface quality The inner and outer surfaces of steel pipes shall be free from visible cracks, folds, crusting, rolling and separation. These defects shall be completely removed. The depth of removal shall not exceed the lower deviation of the nominal wall thickness. 5.8 Ultrasonic testing According to the requirements of the purchaser, after negotiation between the supplier and the purchaser, and indicated in the contract, the steel pipe can be ultrasonically tested, and the acceptance level is L4 in GB/T 5777-2008. 5.9 Galvanized layer According to the requirements of the purchaser, after negotiation between the supplier and the purchaser, and indicated in the contract, the steel pipe can be galvanized for delivery.6 Test methods6.1 The chemical composition analysis of steel pipe is carried out according to the rules of GB/T 20066.Chemical composition analysis is usually carried out according to GB/T 4336, GB/T 20123, GB/T 20124, GB/T 20125 or other common methods. During arbitration, it shall be in accordance with GB/T 223.5, GB/T 223.9, GB/T 223.11, GB/T 223.12, GB/T 223.14, GB/T 223.19, GB/T 223.23, GB/T 223.26, GB/T 223.37, GB/T 223.40, GB/T 223.59, GB/T 223.63, GB/T 223.68, GB/T 223.81, GB/T 223.84, GB/T 223.86, GB/T 20125. 6.2 The size and shape of the steel pipe shall be measured with a gage that meets the accuracy requirements. 6.3 The inner and outer surfaces of steel pipes shall be visually inspected under adequate lighting conditions. 6.4 Sampling methods and test methods for other inspection items of steel pipes shall comply with the requirements of Table 10.7 Inspection rules7.1 Inspection and acceptance The inspection and acceptance of steel pipes shall be carried out by the supplier’s quality and technical supervision department. 7.2 Batching rules 7.2.1 Steel pipes shall be inspected and accepted in batches. 7.2.2 If the steel pipe is not heat treated after being cut into individual pieces, all pipe sections taken from the steel pipe rolled by one tube shall be regarded as one. 7.2.3 Each batch shall consist of steel pipes of the same designation, the same heat number, the same specification, and the same heat treatment system (furnace number). The quantity of each batch of steel pipes shall not exceed the following provisions. 7.3 Sampling quantity The sampling quantity of each batch of steel pipe inspection shall comply with the provisions of Table 10. 7.4 Re-inspection and determination rules The re-inspection and determination rules of steel pipes shall comply with the provisions of GB/T 2102.8 Packaging, marks and quality certificate8.1 The packaging, marks and quality certificate of steel pipes 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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