GB/T 16508.2-2022 PDF EnglishUS$470.00 · In stock · Download in 9 seconds
GB/T 16508.2-2022: Shell boilers - Part 2: Materials 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 16508.2: Historical versions
Similar standardsGB/T 16508.2-2022: Shell boilers - Part 2: Materials---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/GBT16508.2-2022GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.060.30 CCS J 98 Replacing GB/T 16508.2-2013 Shell boilers - Part 2.Materials Issued on. MARCH 09, 2022 Implemented on. OCTOBER 01, 2022 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 Introduction... 6 1 Scope... 8 2 Normative references... 8 3 Terms, definitions and symbols... 11 4 Materials for design... 11 5 Materials for pressure elements... 13 6 Materials for load-bearing members... 25 7 Welding material... 30 Annex A (informative) Elastic modulus, thermal conductivity and expansion coefficient for commonly used materials... 32 Annex B (normative) Metallographic inspection for steel forgings... 34 Bibliography... 351 ScopeThis document specifies the basic requirements, application range (temperature and pressure) and allowable stress of materials such as pressure elements and load-bearing members of shell boilers, as well as selection requirements for welding materials. This document is applicable to the selection and use of materials for pressure elements, load-bearing members, as well as welding materials of shell boilers defined in GB/T 16508.1.2 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 150.2, Pressure vessels - Part 2.Materials GB/T 699, Quality carbon structure steels GB/T 700, Carbon structural steels GB/T 711, Hot-rolled quality carbon structural steel plates sheets and strips GB/T 713, Steel plates for boilers and pressure vessels GB/T 983, Covered electrodes for manual metal arc welding of stainless and heat- resisting steels GB/T 984, Hard facing electrodes for shielded metal arc welding GB/T 1228, High strength bolts with large hexagon head for steel structures GB/T 1229, High strength large hexagon nuts for steel structures GB/T 1230, High strength plain washers for steel structures GB/T 1231, Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures GB/T 1348, Spheroidal graphite iron castings3 Terms, definitions and symbolsFor the purposes of this document, the terms and definitions defined in GB/T 2900.48 and GB/T 16508.1 apply.4 Materials for design4.1 Basic requirements 4.1.1 The steel used for boiler pressure elements and load-bearing members welded with pressure elements shall be killed steel. Elements not specified in the material standards shall not be added to the material without the consent of the boiler manufacturer. 4.1.4 For steel plates, steel pipes, forgings used for boiler pressure elements, and round steel for suspenders, when cast billets (including die casting and continuous casting) are directly used for rolling or forging, the deformation ratio shall not be less than 3.0. 4.1.5 The material manufacturer shall ensure the quality of boiler steel and provide relevant information on material quality certification. Specific requirements are as follows. 4.1.6 Boiler manufacturer shall check and accept boiler materials according to the items specified in JB/T 3375.They can only be used after passing the test. Materials that meet one of the following conditions can be exempted from physical and chemical and corresponding non-destructive testing reinspection during acceptance. 4.1.7 After the version of the material standard is updated, if the performance index or technical requirements of the material are not modified, the use of the stock material will not be affected. 4.2 Pressure elements 4.2.1 The selection of materials is based on the operating conditions of the boiler (temperature, pressure and other environmental factors). At the same time, consider the processing technology and equipment conditions of the manufacturer. 4.2.2 Metal materials and welding materials for pressure elements shall have sufficient strength, plasticity, toughness and good corrosion resistance under service conditions. Materials for components with frequent changes in working conditions shall have good fatigue resistance. 4.2.6 The elastic modulus, thermal conductivity and average linear expansion coefficient of the material can be selected from Annex A. 4.3 Load-bearing members 4.3.1 The steel used in the load-bearing structure shall have the qualified guarantee of yield strength, tensile strength, elongation after fracture, sulfur and phosphorus content. A qualified guarantee for carbon equivalent shall be provided for the welded structure. 4.4 Welding materials 4.1.1 The model and performance of the welding rod or wire shall be compatible with the performance of the corresponding base metal.5 Materials for pressure elements5.1 Steel plate 5.1.1 The applicable range of working pressure and wall temperature (calculated temperature) for carbon steel and low alloy steel plates shall comply with the provisions in Table 1.The allowable stresses of commonly used steel plates are listed in Table 2. 5.1.5 For 13MnNiMoR steel plates with a thickness greater than 36 mm, the drop weight test can be added according to GB/T 6803.The acceptance index of non-plastic transition temperature (NDT) is stipulated in the design documents. 5.1.6 For steel plates with a calculated temperature higher than 300°C, the high temperature tensile test at this temperature may be specified in the design documents if necessary. 5.1.7 If the manufacturing process permits, the boiler shell (drum) can be directly made of controlled-rolled or hot-rolled steel plates with a Q345R plate thickness of 36 mm or less. 5.2 Steel pipe 5.2.1 The application scope for working pressure and wall temperature (calculated temperature) of the steel pipe shall comply with the provisions in Table 3.The allowable stresses of commonly used steel pipes are listed in Table 4. 5.4 Steel casting 5.4.1 The scope of application for steel castings shall comply with the provisions in Table 7.The allowable stresses for commonly used steel castings are listed in Table 8. 5.5 Iron casting 5.5.1 The scope of application for iron castings shall comply with the provisions in Table 9.The allowable stresses for commonly used iron casting materials (nominal thickness not greater than 30 mm) are listed in Table 10.6 Materials for load-bearing members6.1 Suspenders and braces 6.1.1 Rolled or forged round steel can be used for boiler suspenders and bracing materials. The scope of application for round steel used for suspenders and braces shall comply with the provisions in Table 11. 6.2 Suspending device 6.2.1 The scope of application for steel used for the suspending devices (U-shaped clamps, pin shafts, etc.) is in accordance with the provisions in Table 13. 6.2.2 The allowable stress for the steel used for the suspending devices (U-shaped chuck, pin shaft, etc.) shall be in accordance with the provisions in Table 14.7 Welding material7.1 General requirements The procurement, marks, batching, quality certification and reinspection of welding materials shall meet the requirements of NB/T 47018.1.Storage and transportation shall meet the requirements of JB/T 3223. 7.2 Steel welding rod The steel welding rods are materials specified in NB/T 47018.2, GB/T 983, GB/T 984, GB/T 5117, GB/T 5118 and GB/T 32533. 7.3 Gas-shielded arc steel welding wire and filler wire 7.4 Submerged arc welding steel wire and flux Submerged arc welding steel wire and flux are materials specified in NB/T 47018.4, GB/T 5293, GB/T 12470 and GB/T 17854. 7.5 Stainless steel strip and flux for surfacing welding The stainless steel strip and flux used for surfacing welding are materials specified in NB/T 47018.5. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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