HOME   Cart(0)   Quotation   About-Us Tax PDFs Standard-List Powered by Google www.ChineseStandard.net Database: 189760 (2 Nov 2024)

GB/T 16508.2-2013 (GB/T 16508.2-2022 Newer Version) PDF English


GB/T 16508.2-2013 (GB/T16508.2-2013, GBT 16508.2-2013, GBT16508.2-2013)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB/T 16508.2-2022English470 Add to Cart 0-9 seconds. Auto-delivery. Shell boilers - Part 2: Materials Valid
GB/T 16508.2-2013English140 Add to Cart 0-9 seconds. Auto-delivery. Shell boilers -- Part 2: Material Obsolete
Newer version: GB/T 16508.2-2022     Standards related to (historical): GB/T 16508.2-2022

Preview PDF (Powered by Google. Reload if blank, scroll for next page)

GB/T 16508.2-2013: PDF in English (GBT 16508.2-2013)

GB/T 16508.2-2013 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.060.30 J 98 Partially replacing GB/T 16507-1996 Shell Boilers -- Part 2: Material ISSUED ON: DECEMBER 31, 2013 IMPLEMENTED ON: JULY 1, 2014 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC; Standardization Administration of the PRC. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative References ... 5 3 General Requirements ... 7 4 Steel Plate ... 9 5 Steel Tube ... 11 6 Steel Forging ... 13 7 Steel Casting ... 16 8 Iron Casting ... 18 9 Suspender and Tension Brace ... 19 10 Fastener ... 20 11 Welding Material ... 20 Appendix A (Informative) Metallographic Inspection for Steel forging ... 21 Appendix B (Informative) High-temperature Property of the Common Material ... 23 Shell Boilers -- Part 2: Material 1 Scope This Part of GB/T 16508 specifies material designation and its standard, basic technical requirements (including steel plate, steel tube, steel forging, steel casting, iron casting, suspender and tension brace, fastener, welding material), application scope (temperature and pressure), and permissible stress allowed to be used for pressure part of shell boiler, as well as material designation and its standard allowed to be used for non-pressure part of shell boiler. This Part is applicable for selection and application of materials for pressure parts and non-pressure parts of the shell boiler as defined in GB/T 16508.1. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 150.2 Pressure Vessels - Part 2: Materials GB/T 699 Quality Carbon Structural Steels GB/T 700 Carbon Structural Steels GB/T 711 Hot-rolled Quality Carbon Structural Steel Plates, Sheets and Wide Strips GB 713 Steel Plates for Boilers and Pressure Vessels GB/T 1220 Stainless Steel Bars GB/T 1221 Heat-resistant Steel Bars GB/T 1348 Spheroidal Graphite Iron Castings GB/T 3077 Alloy Structure Steels GB 3087 Seamless Steel Tubes for Low and Medium Pressure Boiler GB/T 3274 Hot-rolled Plates and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels GB/T 4338 Metallic Materials - Tensile Testing at Elevated Temperature GB 5310 Seamless Steel Tubes and Pipes for High Pressure Boiler GB/T 6394 Metal - Methods for Estimating the Average Grain Size GB/T 6803 Test method for Drop-weight Test to Determine Nil-ductility Transition Temperature of Ferritic Steels GB/T 8163 Seamless Steel Tubes for Liquid Service GB/T 9439 Grey Iron Castings GB/T 10561 Steel - Determination of Content of Nonmetallic Inclusions- Micrographic Method Using Standards Diagrams GB/T 11352 Carbon Steel Castings for General Engineering Purpose GB/T 13298 Metal - Inspection Method of Microstructure GB/T 16507.2 Water-tube Boilers - Part 2: Materials GB/T 16508.1 Shell Boilers - Part 1: General Requirements JB/T 2637 Specification for Pressure-containing Nodular Iron Castings of Boiler JB/T 2639 Pressure Grey Iron Castings of Boiler - Specification JB/T 4730.3 Nondestructive Testing of Pressure Equipment - Part 3: Ultrasonic Testing JB/T 9625 Specification for Pressure Retaining Casting of Boiler Pipe Fittings JB/T 9626 Specification for Boiler Forging NB/T 47008 Carbon and Low-alloy Steel Forgings for Pressure Equipment NB/T 47018 Technical Permission of Welding Materials for Pressure Equipment 3.3 Quality certificate Steel for pressure part shall be accompanied with material quality certificate of material fabrication organization. The material quality certificate shall meet the following requirements: a) The material fabrication organization shall provide the user with the original quality certificate as specified in the material standard and the order contract; and shall provide distinct and firm steel stamp or other marking on the obvious part of material. The material quality certificate shall be complete and distinct in contents and shall be stamped with the quality inspection seal of the material fabrication organization; b) Where the boiler material is not directly supplied by the material fabrication organization, the supplier shall provide the original material quality certificate or the copies with its official seal and signature of its operator. 3.4 Material acceptance The boiler fabrication organization shall carry out acceptance according to material quality certificate, and the material may only be used after being regarded as acceptable. Foreign designation material shall be accepted according to the technical standards and technical conditions specified in order contract, where necessary, compared with the boiler material standard in China, the lacking inspection item shall be redone, and it may only be used after being regarded as acceptable. Physicochemical and corresponding non-destructive testing and re-inspection may be omitted for the material under any of the following conditions: a) The acceptance personnel of the material using organization carries out acceptance at the material fabrication organization according to the procurement technical requirements and make a witnessed signature on the inspection report for confirmation; b) The carbon steel plate, tube and welding material for boiler under pressure below 3.8MPa shall be provided with distinct and complete physical mark and material quality certificate in accordance with the specified requirements. In addition, the quality certificate shall conform to the physical object. 3.5 Basic requirements 3.5.1 Steel for pressure part and steel for non-pressure part welded to pressure part shall be killed steel. 3.5.2 For the steel plate, steel tube, steel forging and round steel for suspender etc. for pressure part, where they are directly made by rolling and forging with steel billet casting (including ingot casting and continuous casting billet), their compression ratio shall not be less than 3. 3.5.3 After tensile test is carried out on standard specimen of steel (steel plate, steel tube, steel forging and its welded joints etc.) for pressure part, the post-fracture percentage elongation (A) of the steel shall not be less than 18%; impact absorbed energy value KV2 obtained from V-shaped Charpy impact test shall not be lower than 27J. 3.5.4 Permissible stress of steel for pressure part is determined according to the principle of GB/T 16508.1. Permissible stress value between two adjacent calculating temperatures listed in permissible stress table may be determined through arithmetic interpolation method, and its value is rounded off as an integer. 3.5.5 Under use conditions, welding material shall be provided with enough strength, plasticity, toughness and favorable anti-fatigue property and corrosion resistance property. 3.5.6 See Appendix B for non-proportional elongation strength value (Rp0.2) of steel at high temperature, mean value of 105h endurance strength, elasticity modulus and mean linear expansion coefficient, etc. 4 Steel Plate 4.1 Application Scope for common steel plate is in accordance with those specified in Table 1. 4.2 Permissible stress of the steel plate material is in accordance with those specified in Table 2. 4.3 Where heat treatment like normalizing and normalizing plus tempering are needed to be carried out on steel plate material during boiler fabrication, steel plate fabrication organization may deliver steel plate with its delivery state different from the heat treatment specified in Table 2. Where the steel plate fabrication organization and the boiler fabrication organization carry out delivery inspection and receiving acceptance for mechanical property of steel plate respectively, rough specimen after heat treatment is used for the test. 4.4 For 20 steel plate purchased according to GB/T 711, the lower yield strength value (ReL) specified in its material quality certificate or after receiving re-inspection for tensile test shall not be less than 245MPa. suspension device (U-shaped clamp and pin roll etc.) are in accordance with those specified in Table 7 and Table 8 respectively. 6.3 The rating for steel forging is determined by the design document and noted in the drawing. 6.4 Where required by user, Grades III and IV steel forging of pressure part shall additionally be subject to metallographic inspection by reference to the requirements in Appendix A. 6.5 For steel forging with the design calculating temperature above 300°C, a high- temperature tensile test at the design calculating temperature may be additionally required in the design document and shall comply with GB/T 4338; see Appendix B for the specified value of non-proportional elongation strength at high temperature Rp0.2. 6.6 Slip-on-welding steel tube flange with operating pressure not exceeding 2.5MPa may be fabricated with the steel plate given in Table 1. 6.7 Parts such as tube fittings (tee junction, elbow and reducer union etc.) and header head may be processed and fabricated by hot processing with corresponding materials of steel tube given in Table 3. 6.8 Except for various flanges, hollow cylindrical tube fittings or tube cape fittings may be processed by rolled or forged round steel with the corresponding materials designation given in Table 5, with the round steel not allowed to be substituted by steel plate. Where rolled or forged round steel is used for processing hollow cylindrical tube fittings or tube cape fittings, the following requirements shall be complied with: a) The outside diameter of carbon steel tube fittings shall not be larger than 160mm and that of alloy steel tube fittings or tube cap fittings shall not be larger than 114mm; b) The longitudinal axis of tube fittings shall be in line with the axis of round steel; c) The heat treatment state of processed fittings shall comply with the requirements of drawing; d) The processed fittings shall be subject to non-destructive testing according to requirements of drawing. tempering 8 Iron Casting 8.1 The application scope of iron casting shall be in accordance with those specified in Table 12. 8.2 The safety coefficient for the tensile strength of grey iron casting at room temperature is not less than 10.0, and that for spheroidal graphite iron casting at room temperature is not less than 8.0. Permissible stress of common iron casting material (with nominal thickness ≤30mm) is in accordance with those specified in Table 13. 8.3 Grey iron casting shall not be used to fabricate the blowdown valve and blowdown bent tube. 8.4 For boiler with the rated operating pressure less than or equal to 1.6MPa and superheater with the steam temperature less than or equal to 300°C, the spheroidal graphite iron casting listed in Table 12 may be adopted for the fabrication of their blow- off valve and blowdown valve. 8.5 For the square cast-iron economizer and elbow of the boiler with the rated operating pressure less than or equal to 2.5MPa, grey iron casting with the designation not less than HT 300 is allowed to be adopted; for the square cast-iron economizer and elbow of the boiler with the rated operating pressure less than or equal to 1.6MPa, the grey iron casting with the designation not less than HT 300 is allowed to be adopted. 8.6 Repair welding is forbidden to be carried out on the iron casting used for the bearing part. Table 12 -- Application Scope for Iron Casting Material category Material designation Material standard Application scope Nominal diameter dimension mm Operating pressure MPa Medium temperature °C Grey iron casting HT300, HT350 GB/T 9439 ≤300 ≤0.8 < 230 JB/T 2639 ≤200 ≤1.6 Spheroidal graphite iron casting QT400-18, QT450-10 GB/T 1348 ≤150 ≤1.6 < 300 JB/T 2637 ≤100 ≤2.5 Appendix A (Informative) Metallographic Inspection for Steel forging A.1 General A.1.1 This appendix is a supplement to the text of the standard, specifying the requirements for metallographic inspection of steel forging for pressure part. A.1.2 Steel forging for pressure part shall not only comply with this appendix, but also meet the relevant requirements of this Standard. A.2 Metallographic inspection A.2.1 Additional metallographic inspection may be carried out on Grade III and IV steel forging used for boiler pressure part. A.2.2 The sampling position for metallographic inspection is the same as that for mechanical property test. A.2.3 Actual grain size The actual grain size of steel forging shall be inspected as GB/T 6394 and shall be in accordance with that specified in Table A.1. Table A.1 -- Actual Grain Size of Steel Forging Material designation Grain size rating Two testing areas Difference between the maximum rating and the minimum rating of grain size 20 Grades 4~10 Shall not exceed Grade 3 16Mn 15CrMo, 14Cr1Mo 12Cr1MoV, 12Cr2Mo1 A.2.4 Nonmetallic inclusion The nonmetallic inclusion of steel forging is rated according to Method A of GB/T 10561; Classes A, B, C, D and DS inclusions (regardless of fine or rough) individually shall be rated at 2.5 or less; the overall class of various fine and rough inclusions respectively shall be 6.5 or less. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.