NB/T 47016-2023 PDF EnglishUS$260.00 · In stock · Download in 9 seconds
NB/T 47016-2023: Mechanical property tests of product welded test coupons for pressure equipment Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid NB/T 47016: Historical versions
Similar standardsNB/T 47016-2023: Mechanical property tests of product welded test coupons for pressure equipment---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/NBT47016-2023NB ENERGY INDUSTRY STANDARD OF THE PEOPLE��S REPUBLIC OF CHINA ICS 25.160 CCS H 22 Replacing NB/T 47016-2011 Mechanical property tests of product welded test coupons for pressure equipments Issued on. DECEMBER 28, 2023 Implemented on. JUNE 28, 2024 Issued by. National Energy Administration Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 General... 6 5 Test coupon preparation... 7 6 Mechanical properties test category and specimen of test coupon... 9 7 Inspection method and qualified index... 11 8 Retest... 23 9 Other tests... 24ForewordThis document was drafted in accordance with the provisions of GB/T 1.1-2020 "Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents". This document replaces NB/T 47016-2011 "Mechanical property tests of product welded test coupons for pressure equipments". Compared with NB/T 47016-2011, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) MODIFY the scope of application, adding the relevant provisions for welded test coupons of zirconium products (see Chapter 1); b) ADD the welded test coupons of the head split joint and spherical container products [see 4.4 a) and 4.4 c)]; c) ADD the qualified indicators of tensile strength and bending performance of zirconium container welded joints (see 7.1.4.1 and Table 3); d) MODIFY the qualified indicators of full weld metal tensile test (see 7.1.4.2); e) MODIFY the qualified indicators of impact absorption energy of boiler steel welded joints (see 7.3.4 b)]; f) ADD the provisions for qualified indicators of impact absorption energy of welded joints with two metal material codes as the parent material (see 7.3.4 c)]. Please note that some of the contents of this document may involve patents. The issuing agency of this document does not assume the responsibility for identifying patents. This document was proposed by AND shall be under the jurisdiction of the National Technical Committee for Standardization of Boiler and Pressure Vessels (SAC/TC 262). The drafting organizations of this document. Hefei General Machinery Research Institute Co., Ltd., China Special Equipment Inspection and Research Institute, Dalian Boiler and Pressure Vessel Inspection and Testing Institute Co., Ltd., Fushun Machinery Equipment Manufacturing Co., Ltd., Lanzhou Lanshi Heavy Equipment Co., Ltd., Sinopec Engineering Construction Co., Ltd., Shanghai Boiler Plant Co., Ltd., China Petroleum and Natural Gas First Construction Co., Ltd., Sinopec Nanjing Chemical Machinery Co., Ltd., China Petroleum and Natural Gas Pipeline Science Research Institute Co., Ltd., State Administration for Market Regulation, Shanghai Special Equipment Supervision and Inspection Technology Research Institute, Harbin Boiler Plant Co., Ltd., First Heavy Group Dalian Nuclear Power Petrochemical Co., Ltd., Guangxi Zhuang Autonomous Region Special Equipment Inspection and Research Institute. The main drafters of this document. Fang Wunong, Li Jun, Guo Chuanjiang, Hu Xihai, Zhang Jianxiao, Ge Zhaowen, Dou Wanbo, Wang Jinguang, Wang Jiongxiang, Zhu Ning, Nie Min, Sui Yongli, Chang Yanyan, Ji Fang, Gu Fuming, Li Yinan, Yuan Jijun, Guo Guangfei, Yang Guoyi, Jiang Haiyi, Hu Weipeng. This document is interpreted by the National Technical Committee for Standardization of Boilers and Pressure Vessels (SAC/TC 262). This standard replaces the standard previously issued as follows. - JB/T 1614-1994; - JB 4744-2000; - NB/T 47016-2011. Mechanical property tests of product welded test coupons for pressure equipments1 ScopeThis document specifies the preparation of welded test coupons, specimen preparation, inspection methods, qualified indicators for pressure equipment (boilers, pressure vessels and pressure pipes). This document is applicable to the mechanical and bending performance tests of welded test coupons (including welded test plates, simulation rings, certification rings) of steel, aluminum, titanium, copper, nickel, and zirconium pressure equipment products. This document is not applicable to the mechanical and bending performance tests of welded test coupons of gas cylinder products.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in the text. Among them, 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 228 (all parts) Metallic materials - Tensile testing at ambient temperature GB/T 229 Metallic materials - Charpy pendulum impact test method GB/T 2652 Destructive tests on welds in metallic materials - Longitudinal tensile test on weld metal in fusion welded joints GB/T 2653 Bend test methods on welded joints GB/T 3375 Welding terminology NB/T 47014 Welding procedure qualification for pressure equipments3 Terms and definitionsThe terms and definitions defined in GB/T 3375 and NB/T 47014 apply to this document. If there is any inconsistency, the terms and definitions of NB/T 47014 shall prevail.4 General4.1 In addition to complying with the provisions of this document, the mechanical property inspection of product welded test coupons shall also comply with the provisions of relevant safety technical specifications, standards, design documents. 4.2 The materials used for the test coupons shall be taken from qualified raw materials; they shall be of the same standard, code (designation, steel grade), specification (limited thickness), heat treatment state as the materials of the pressure equipment components they represent. 4.3 Welded test coupons for pressure equipment products are divided into plate test coupons and tubular test coupons; tubular test coupons refer to pipes and rings. 4.4 Welding of product welded test coupons. 4.5 Test coupon welding procedure 4.5.1 When the inspected welded joints undergo different welding procedures, the welding procedure and conditions experienced by the test coupon shall be the same as those of the welded joints they represent. 4.5.2 The welder of the test coupon shall be selected from the welders who weld the pressure equipment components. 4.5.3 The test coupon shall be prepared according to the prepared special welding procedure documents. The test coupon code, work order number or pressure equipment number, and material code shall be clearly stated in the welding procedure documents. 4.6 After the test coupon has been inspected visually and tested non-destructively, it is allowed to avoid welding defects and prepare specimens. 4.7 The specimen is allowed to be cold leveled before removing the weld excess height. 4.8 When the test coupon adopts two or more welding methods, or welding procedures with different important factors and supplementary factors, the welded joints of all welding methods or welding procedures shall be tested for mechanical properties and bending properties. 4.9 The test coupon shall be marked with the following identification marks.5 Test coupon preparation5.1 The size and quantity of the test coupon shall meet the requirements for cutting the test coupons (including those for re-testing). The test coupons can also be cut directly on the weldment. 5.2 Test coupon size. The length of the plate test coupon is greater than or equal to 300 mm; the width is greater than or equal to 250 mm. The length of the tubular test coupon is greater than or equal to 250 mm. See Figure 1 and Figure 2 for test coupon dimensions.6 Mechanical properties test category and specimen of test coupon6.1 When the relevant specifications, standards and design documents of pressure equipment have impact test requirements for welded joints, product welded test coupons shall be subjected to impact test. 6.2 The full weld metal tensile test is only applicable to the longitudinal welded test coupons of Class A boiler drum and header components. 6.3 The allowable tolerance of the specimen size shall be determined in accordance with the relevant standards or technical documents. 6.4 The mechanical properties and bending properties test category and the number of specimens shall be in accordance with the provisions of Table 1. 6.5 Specimen position 6.5.1 The sampling position of plate test coupons shall be as shown in Figure 1. 6.5.2 The sampling position of tubular test coupons shall be as shown in Figure 2. 6.6 The length of the discarded part at both ends of the test coupon varies with the welding method and plate thickness. 6.7 The specimen blank is cut by cold working method, or hot working method; however, the oxide layer and other materials need to be removed by cold working method to expose the metallic luster. 6.8 After the specimen passes the inspection and marked, it is stamped with a steel stamp or permanent mark.7 Inspection method and qualified index7.1 Tensile test 7.1.1 Joint tensile specimen 7.1.1.1 Sampling and processing requirements. 7.1.1.2 Specimen form. 7.1.2 Full weld metal tensile specimen The sampling position and processing of the full weld metal tensile specimen can be carried out in accordance with the provisions of GB/T 2652. 7.1.3 Test method The tensile test is carried out in accordance with GB/T 228, to determine the tensile strength of the welded joint, the tensile strength, lower yield strength or plastic elongation strength of the full weld metal. 7.2 Bending test 7.2.1 Test requirements The tensile surface of the bending specimen shall include the weld metal, fusion zone, heat affected zone of each welding method (or welding procedure with different important factors). 7.2.2 Specimen form and processing 7.2.3 Test method a) The bending test shall be carried out in accordance with GB/T 2653 and Table 3, to determine the integrity and plasticity of the welded joint. b) The weld center of the specimen shall be aligned with the axis of the pressure head. During the side bend test, if there is a defect on the surface of the specimen, the side with the more serious defect shall be used as the tensile surface. c) The bending angle shall be measured when the specimen is under load. 7.2.4 Qualified indicators After the specimen is bent to the specified angle, the weld, fusion zone, heat affected zone on its tensile surface shall not have a single open defect, which has a length greater than 3 mm in any direction. The corner opening defects of the specimen are not counted; however, the length of the corner opening defects caused by lack of fusion, slag 3 or 10 inclusion or other internal defects shall be counted. If the specimen thickness T �� 38 mm and two or more specimens are used, each specimen shall meet the above requirements. 7.3 Impact test 7.3.1 The weld metal and heat affected zone of each welding method (or welding procedure with different supplementary factors) shall be subjected to Charpy V-notch impact test.8 Retest8.1 If a certain item of mechanical properties and bending properties test fails, it is allowed to resample from the original test coupon for retest of unqualified items. 8.2 Specimens, test methods and qualified indicators 8.2.1 The cutting position, specimen preparation, test method of retest specimens shall still be in accordance with the provisions of this document. 8.2.2 The qualified indicators of tensile test and bending test shall still be in accordance with the provisions of 7.1 and 7.2; all retest specimens shall be qualified. 8.2.3 The average impact absorption energy of the two groups of 6 specimens before and after the impact test shall not be lower than the specified value.9 Other testsFor welded product test coupons with other requirements such as high temperature tensile properties, corrosion resistance, hardness, the test methods and qualified indicators shall comply with the relevant standards and design documents. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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