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GB/T 35072-2018 English PDF

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GB/T 35072-2018: Corrosion resistant alloy bimetal fittings for petroleum and natural gas industries
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GB/T 35072-2018English819 Add to Cart 7 days [Need to translate] Corrosion resistant alloy bimetal fittings for petroleum and natural gas industries Valid GB/T 35072-2018

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Basic data

Standard ID GB/T 35072-2018 (GB/T35072-2018)
Description (Translated English) Corrosion resistant alloy bimetal fittings for petroleum and natural gas industries
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard E16;J15
Classification of International Standard 75.200; 23.040.01
Word Count Estimation 41,486
Date of Issue 2018-05-14
Date of Implementation 2018-12-01
Regulation (derived from) National Standards Announcement No. 6 of 2018
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 35072-2018: Corrosion resistant alloy bimetal fittings for petroleum and natural gas industries


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Corrosion resistant alloy bimetal fittings for petroleum and natural gas industries ICS 75.200; 23.040.01 E16; J15 National Standards of People's Republic of China Corrosion-resistant alloy composite pipe fittings for oil and gas industry Published on.2018-05-14 2018-12-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and definitions, symbols, codes and abbreviations 3 3.1 Terms and Definitions 3 3.2 Symbols and Codes 4 3.3 Abbreviations 5 4 types and codes 5 5 Design 6 6 Dimensions & Tolerances 6 6.1 Standard size 6 6.2 Wall thickness 6 6.3 Inner diameter 6 6.4 Ellipticity 7 6.5 Tolerance 7 7 Material 9 7.1 Grassroots 9 7.2 Inner coating 10 7.3 Composite board 10 7.4 Mother tube 10 8 Manufacturing 11 8.1 General provisions 11 8.2 Welding 12 8.3 Heat treatment 12 8.4 School Circle 12 8.5 pipe end 12 8.6 Surface treatment 13 8.7 Process Evaluation 13 9 Technical requirements and test methods 13 9.1 General provisions 13 9.2 Geometry 14 9.3 Chemical composition 15 9.4 Tensile properties 15 9.5 CVN impact toughness 16 9.6 Guided bending test 17 9.7 Full-section Vickers hardness 17 9.8 Surface hardness 19 9.9 Macroscopic inspection of welds and metallographic examination 19 9.10 Inner coating shear bond strength 20 9.11 Intergranular corrosion test 20 9.12 Base material corrosion test 20 9.13 Inner cladding material corrosion test 20 9.14 Hydrostatic test 20 9.15 Design Verification Test 21 10 Nondestructive testing 22 10.1 General requirements 22 10.2 Surface Inspection 22 10.3 Pipe and welds 23 10.4 Tube end 23 10.5 Residual magnetism at the end of the tube 23 11 Surface quality, defects and defect handling 23 11.1 Surface quality 23 11.2 Defects and defects handling 23 12 logo 24 12.1 Marking Method 24 12.2 Marking position 24 12.3 Flag Content 24 12.4 Logo Example 24 13 Transportation and protection 25 14 File 25 Appendix A (Normative) Corrosion test method for cladding materials Appendix B (Normative) Manufacturing Process Assessment 29 Appendix C (informative) Composite pipe inspection and test sampling position 31 Appendix D (informative) Corrosion test method for base materials 35 Reference 37

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This standard is proposed and managed by the National Oil and Gas Standardization Technical Committee (SAC/TC355). This standard was drafted. China Petroleum and Natural Gas Corporation Petrochemical Engineering Technology Research Institute, Zhengzhou Wanda Heavy Industry Co., Ltd., Zhejiang Jiuli Special Materials Technology Co., Ltd., China National Petroleum Corporation Tarim Oilfield Branch, China Petroleum Engineering Construction Southwest Branch of Co., Ltd., Cangzhou Longtaidi Pipeline Technology Co., Ltd., Xi'an Xiangyang Aerospace Materials Co., Ltd., Hebei Bohai Nuclear Pack Preparation Technology Co., Ltd., China Petroleum and Chemical Corporation, Northwest Oilfield Branch. The main drafters of this standard. Wei Bin, Li Weiwei, Qi Dongtao, Feng Yaorong, Ma Qiurong, Fang Wei, Qin Changyi, Li Fagen, Li Xun, Li Yajun, Li Xianming, Qu Dingming, Zhang Fufeng, Ren Baojian, Chen Qingbiao, Yang Lijian, Wang Chunjian, Li Huajun, Meng Qingyun, Yang Dongming, Yang Zhiyong. Corrosion-resistant alloy composite pipe fittings for oil and gas industry

1 Scope

This standard stipulates that the pipeline diameter of the oil and gas industry pipeline system is DN50~DN800 with corrosion resistant alloy as the inner cover. Layer metallurgical composite pipe design, geometry, materials, manufacturing processes, technical requirements and inspection methods, NDT, surface quality and defects Basic requirements for management, marking, transportation and protection. This standard applies to the transportation pipelines in the oil and gas industry and the process pipelines to transport oil and natural gas containing corrosive media. Corrosion-resistant alloy composite pipe fittings for single-phase or multi-phase fluids such as water, and other fields can also be referred to. This standard composite pipe fittings include elbows, three Through, reducer and cap.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 228.1 tensile testing of metallic materials - Part 1 GB/T 228.2 tensile testing of metallic materials - Part 2. GB/T 229 metal material Charpy pendulum impact test method GB/T 232 metal material bending test method GB/T 4340.1 Vickers hardness test for metallic materials - Part 1. Test methods GB/T 6394 method for determination of average grain size of metals GB/T 6396 composite steel plate mechanical and process performance test method GB/T 8923.1-2011.Determination of surface cleanliness of steels before coatings -- Part 1 . uncoated Corrosion grade and treatment grade of the steel surface and the surface of the steel after the original coating is completely removed GB/T 9445-2015 Non-destructive testing personnel qualification and certification GB/T 10561 steel - Determination of non-metallic inclusions - Standards GB/T 12459 steel butt welded pipe fittings type and parameters GB/T 13401 steel butt welded pipe fittings technical specification GB/T 15970.2 Corrosion stress corrosion test of metals and alloys - Part 2. Preparation and application of curved beam specimens GB/T 17394.1 Test methods for hardness of metallic materials - Part 1 . Test methods GB/T 17600.1 Elongation of steel - Part 1. Carbon steel and low alloy steel GB/T 18590 Corrosion pitting evaluation method for metals and alloys GB/T 29168.2 Inductive heating bends, fittings and flanges for pipelines in the oil and gas industry - Part 2. Pipe fittings GB 50251 gas pipeline engineering design specification GB 50253 Oil Pipeline Engineering Design Specification NB/T 47002.1-2009 Explosive welded composite sheets for pressure vessels - Part 1. Stainless steel - steel composite panels NB/T 47002.2-2009 Explosive welded composite sheets for pressure vessels - Part 2. Nickel-steel composite panels NB/T 47013.2-2015 Non-destructive testing of pressure equipment - Part 2. Radiographic testing NB/T 47013.3 Non-destructive testing of pressure equipment - Part 3. Ultrasonic testing NB/T 47013.4-2015 Non-destructive testing of pressure equipment - Part 4. Magnetic particle testing NB/T 47013.5-2015 Non-destructive testing of pressure equipment - Part 5. Penetration testing NB/T 47013.7 Non-destructive testing of pressure equipment - Part 7. Visual inspection NB/T 47014 Pressure welding equipment welding process evaluation NB/T 47015 Pressure Vessel Welding Procedure SY/T 4109 Non-destructive testing of oil and gas steel pipelines SY/T 5257 Induction heating elbow for oil and gas transmission SY/T 6423.1-2013 Petroleum and natural gas industry - Non-destructive testing methods - Part 1 Line detection SY/T 6423.2-2013 Non-destructive testing methods for steel tubes for oil and gas industry - Part 2 Automatic ultrasonic testing for lateral defects SY/T 6423.4 Non-destructive testing methods for steel tubes for oil and gas industry - Part 4. s Dynamic ultrasonic testing TSGZ6002 special equipment welding operator assessment rules ISO 15156-1 - Petroleum and natural gas industries - Materials for use in H2S - Part 1 General principles of choice (Petroleum and naturalgasindustries-Materialsfor usein H2S-containing environmentsinoilandgasproduction-Part 1.Generalprinciplesforselectionofcracking-resistant Materials) ISO 15156-2 - Petroleum and natural gas industries - Materials for use in H2S - Part 2 Low alloy steel and the use of cast iron (Petroleum and naturalgasindustries-MaterialsforuseinH2S-containing environmentsinoilandgasproduction-Part 2. Cracking-resistantcarbonandlow-aloysteels,and Theuseofcastirons) APISpec5L..2012 Pipeline Specification (Specificationforlinepipe) APISpec5LD Inner or Lined Corrosion Resistant Alloy Composite Steel Pipe Specification (Specification forCRAcladorlinedsteel Pipe) ASTMA263.2012 Standard Specification for Chromium Stainless Steel Composite Steel Sheets (Standardspecificationforstainlesschromium Steel-cladplate) ASTM A264.2012 Standard Specification for Chromium-Nickel Stainless Steel Composite Sheets (Standardspecificationforstainless Chromium-nickelsteel-cladplate) ASTM A265.2012 Standard Specification for Nickel and Nickel Base Alloy Composite Steel Sheets (Standardspecificationfornickeland Nickel-basealoy-cladsteelplate) ASTMA751 Test methods, procedures and terminology for chemical analysis of steel products (Standardtestmethods, practices, and Terminologyforchemicalanalysisofsteelproducts) ASTME340 Standard Test Method for Macroscopic Corrosion of Metals and Alloys (Standardpracticeformacroetchingmetals Andaloys) Standard Test Method for Chemical Analysis of ASTME353 Stainless Steel, Heat Resistant, Martensitic and Other Similar Chromium-Nickel-Iron Alloys (Standardtestmethodsforchemicalanalysisofstainless,heat-resisting,maraging,andothersimilar Chromium-nickel-ironaloys) ASTME562 Test method for determining volume fraction by systematic manual point counting (Standardtestmethodfordetermi- Ningvolumefractionbysystematicmanualpointcount) 3 Terms and definitions, symbols, codes and abbreviations 3.1 Terms and definitions The following terms and definitions apply to this document. 3.1.1 Purchaser purchaser The owner includes its agents, inspectors and other authorized representatives. 3.1.2 Manufacturer manufacturer A factory or company responsible for the production of composite fittings and marking the products in accordance with the requirements of this standard. 3.1.3 Metallurgical composite clad Through the composite process of hot rolling, explosion, surfacing, etc., the contact interface between the corrosion resistant alloy and carbon steel or low alloy steel forms atomic interdiffusion And the formation of the combination. 3.1.4 Grassroots backinglayer The mechanical load or pressure bearing part of the composite plate, composite pipe or composite pipe is made of carbon steel or low alloy steel. 3.1.5 Inner cladding cladlayer A portion of the corrosion-resistant alloy material bonded to the surface of the carbon steel or low-alloy steel base material by metallurgical composite means. 3.1.6 Similar composite pipe fittings bimetalfittingsofsametype A set of elbows, tees, reducers, or caps with the same code. 3.1.7 Outer arc side extrados The outer portion of the curved section of the elbow. 3.1.8 Inner arc side introados The inner part of the curved section of the elbow. 3.1.9 Straight pipe segment Straight pipe section at the end of the pipe. 3.1.10 Corrosion-resistant alloy composite pipe fittings corrosionresistantaloybimetalfittings According to the principle of corrosion resistance of the base material and the anti-corrosion of the inner coating material, carbon steel or low alloy steel is used as the base material and corrosion-resistant alloy. The inner layer composite pipe fittings, referred to as composite pipe fittings. 3.1.11 Corrosion resistant alloy corrosionresistantaloy A general term for corrosion-resistant alloy materials such as stainless steel and nickel-based alloys used in the manufacture of composite sheets, mother tubes and composite tubes. 3.1.12 Mother tube motherpipe Metallurgical composite straight pipe for the manufacture of corrosion resistant alloy composite pipe fittings. 3.1.13 Unbound unbound The bond between the base layer and the corrosion-resistant alloy layer is not bonded. 3.1.14 Acidic environment sourenvironment H2S partial pressure greater than or equal to 0.3 kPa and can cause SSC to occur in carbon steel or low alloy steel materials as specified in ISO 15156-2 Single-phase or multi-phase fluid environments containing media such as oil, natural gas, and water in the form of HIC failure. 3.1.15 Shear bond strength shearbondstrength The cut required for the unit contact area where the inner coating of the metallurgically bonded composite sheet, the composite tube or the composite tube is separated from the base layer Toward stress. 3.1.16 Anti-pitting equivalent number fittingsistanceequivalentnumber It is used to reflect and predict the pitting resistance of corrosion-resistant alloys, based on the content of Cr, Mo, W and N in the chemical composition of the alloy. Come to fix. Note. See ISO 15156-3 for detailed information. 3.2 Symbols and codes The following symbols and codes apply to this document. A---90° elbow center to end length, in millimeters (mm); B---45° elbow center to end length, in millimeters (mm); C---three-way center to end length (tube), in millimeters (mm); D, D1---the outer diameter of the end of the composite pipe, in millimeters (mm); D---the nominal inner diameter of the end of the composite pipe, in millimeters (mm); Dmax---the maximum outer diameter of the cross section of the composite pipe, in millimeters (mm); Dmin---the minimum outer diameter of the cross section of the composite pipe, in millimeters (mm); Dn---the nominal outer diameter at the cross section of the composite pipe fitting, in millimeters (mm); Dp---The nominal outer diameter of the pipe connected to the composite pipe, in millimeters (mm). DN---the nominal diameter of the composite pipe fittings of the metric unit, which is a non-measured value in millimeters (mm); E, E1---The length from the back to the end of the cap, in millimeters (mm); e---The extension length of the coating in the groove of the welded end of the composite pipe fitting, the unit is mm (mm); H---the length of the end face to the end face of the reducer, in millimeters (mm); M---three-way center to end length (outlet), in millimeters (mm); O---ellipticity; P---composite pipe fitting test to calculate the minimum strength in MPa (MPa); Q---Composite pipe fitting position tolerance, end face verticality, the unit is mm (mm); Rm---tensile strength; Rt0.5---the yield strength of the total elongation of 0.5%; S---corrosion sample area in square millimeters (mm2); t---The nominal wall thickness of the inner cladding of the composite pipe fitting, the unit is mm (mm); tB---the nominal wall thickness of the base layer of the composite pipe fitting, the unit is mm (mm); Tcorr---corrosion test time in days (d); Tp---the nominal wall thickness of the pipe connected to the composite pipe or the nominal wall thickness of the base pipe of the composite pipe, in millimeters (mm); U---shape tolerance, composite pipe flatness, in millimeters (mm); Vcorr---average corrosion rate in millimeters per year (mm/a); Σb---the actual tensile strength of the composite pipe base material (when the actual tensile strength of the composite pipe base material is less than the name of the connecting pipe) For the minimum tensile strength, calculate according to the nominal minimum tensile strength of the connecting pipe), the unit is MPa (MPa); φ---design verification test coefficient; ΔW—the mass loss of the corrosion sample in grams (g); ρ---The density of the corrosion sample material in grams per cubic centimeter (g/cm3). 3.3 Abbreviations The following abbreviations apply to this document. AUT automatic ultrasonic testing (automaticultrasonictesting) CLR crack length ratio (cracklengthratio) CSR crack sensitivity rate (cracksensitivityratio) CTR crack thickness rate (crackthicknessratio) CVN Charpy V-notch HAZ heat affected zone (heat-affectedzone) HIC hydrogen induced cracking MPQT manufacturing process qualification test (manufacturingprocedurequalificationtest) MPS manufacturing procedure specification (manufacturing procedure specification) MT magnetic particle detection (magnetictesting) NDT nondestructive testing (nondestructive testing) PREN resistance to pitting equivalents (pittingresistanceequivalentnumber) PT penetration test (penetranttesting) RT radiography (radiographictesting) SCC stress corrosion cracking (stresscorrosioncracking) SMYS specifies minimum yield strength (specifiedminimumyieldstrength) SSC sulfide stress cracking TIG tungsten inert gas shielded welding (tungsteninertgasarcwelding) UT ultrasonic testing (ultrasonictesting)

4 types and codes

The types and codes of corrosion-resistant alloy composite pipe fittings included in this standard are shown in Table 1. Table 1 Types and codes of composite pipe fittings Type type code 45° elbow long radius 45E(L) 90° elbow Long radius 90E (L) Short radius 90E(S) Reducing joint (size head) Concentric R(C) Eccentricity R(E) Table 1 (continued) Type type code Three links Equal diameter T(S) Different diameter T(R) Cap - C

5 design

5.1 Composite pipe design documents shall include at least the design drawings and strength calculation files. The design parameters of the composite pipe fittings should be related to the design of the connected pipes. The parameters are consistent. 5.2 The strength of composite pipe fittings and material selection shall follow the principle of corrosion resistance of the base layer and corrosion protection of the inner cladding. 5.3 The composite pipe fittings shall be designed according to the pressure and temperature of the conveying fluid, and the priority shall be GB 50251, GB 50253 or the country. The calculation and analysis method specified in the approved pressure vessel or pressure piping specification determines the nominal wall thickness of the base layer, and may also be verified in accordance with the provisions of 9.15. The method is to determine the wall thickness of the composite pipe joint, and the ability of the composite pipe to withstand the internal pressure should not be lower than the pressure resistance of the connecting pipe. In addition, the designer Other loads, including static and dynamic loads, and pressure tests of the pipelines should also be considered in accordance with GB 50251 or GB 50253. condition. 5.4 The inner design of the composite pipe made of composite coils shall have a minimum design wall thickness of not less than 2.5 mm and shall be manufactured by a surfacing process. The minimum design wall thickness of the inner cladding of the composite pipe fitting shall be not less than 3.0 mm. 5.5 The material selection of composite pipe fittings should take into account the corrosive nature of the conveying fluid and follow the following principles. a) If the transport fluid contains H2S and is in an acidic environment, it shall be agreed between the purchaser and the manufacturer to determine whether the composite pipe base needs to be full. Foot ISO 15156-1 and ISO 15156-2 requirements. b) if the transport fluid contains one or more corrosive media such as H2S, CO2, Cl-, etc., the inner cladding shall have anti-SSC and/or SCC, Resistance to heavy-duty corrosion and pitting corrosion shall ensure that the inner cladding material meets the requirements of Appendix A.

6 Dimensions and tolerances

6.1 Standard size Except as otherwise stipulated in this standard, composite pipe fittings shall conform to the geometrical dimensions specified in GB/T 12459 or GB/T 13401, and composite pipe fitting ends. The outer diameter of the part is divided into two series, I and II. The I series is an international general series. When writing the mark, the "I" can be omitted and should be preferred. I series. 6.2 Wall thickness 6.2.1 If the wall thickness of the composite pipe is determined by the calculation and analysis method specified in 5.3, the minimum wall thickness of the base layer may be smaller than the nominal wall thickness. 0.25mm. The residual wall thickness of the base layer in the isolated discontinuous partial thinning or repaired portion shall not be less than 87.5% of the nominal wall thickness. 6.2.2 The inner wall thickness of the composite pipe fittings shall not be lower than the minimum design wall thickness requirement, and the inner cladding wall thickness shall only allow positive deviation and the deviation shall not be greater than 1.0mm. 6.3 inner diameter The inner diameter of the composite pipe fitting within 50mm from the pipe end shall be the same as the inner diameter of the connected pipe and the inner diameter within 50mm from the pipe end. The maximum deviation allowed is ±0.5mm. 6.4 Ellipticity For all composite fittings, the ellipticity O shall be no more than 0.5% from the end of the pipe 100 mm; for all elbows, the ellipse of the curved section The roundness O should be no more than 2.5%. Ellipticity O is calculated according to formula (1). O= Dmax-Dmin Dn × 100% (1) In the formula. O --- ovality; Dmax --- the maximum outer diameter of the cross section of the composite pipe, in millimeters (mm); Dmin --- the minimum outer diameter of the cross section of the composite pipe, in millimeters (mm); Dn --- nominal outer diameter at the cross section of the composite pipe, in millimeters (mm). 6.5 Tolerance 6.5.1 The limit deviation of the composite pipe size shall comply with the requirements of Figure 1 and Table 2. 6.5.2 The geometrical tolerance of composite pipe fittings shall comply with the requirements of Figure 2 and Table 3. Table 2 The limit deviation of the composite pipe size is in millimeters Project pipe type Nominal diameter DN range 50~65 80~100 125~200 250~450 500~600 650~800 tolerance End outer diameter, D, D1a End diameter Base wall thickness b Inner coating wall thickness End ovality All fittings 1.6 -0.8 ±1.6 2.0 -1.2 4.0 -2.5 6.4 -4.8 6.4 -4.8 The maximum deviation allowed in the range of 50mm from the pipe end is ±0.5mm The minimum wall thickness is tB-0.25mm 1.0 Not more than 0.5% within 100mm from the end of the pipe Elbow of the curved section, all elbows are not more than 2.5% Center to end Size, A, B, C, M 45° elbow 90° elbow Three links ±2.0 ±3.0 End to end length, H reducer ±2.0 ±3.0 Back to end length, E or E1 cap ± 3.0 ± 5.0 a When it is necessary to increase the wall thickness of the composite pipe base to meet the internal pressure resistance requirements, this tolerance may not be applicable to the local area of the composite pipe fitting. b The minimum wall thickness of the base layer determined by the calculation and analysis method is the base nominal wall thickness tB minus 0.25 mm, but does not include the isolated non-permitted by 6.2.1. Continuous local thinning. a) 90° elbow b) 45° elbow c) Equal-diameter tee d) Reducing tee e) Concentric reducer joint f) Eccentric reducer joint g) Cap Figure 1 Schematic diagram of the geometry of the composite pipe a) elbow b) Three links Figure 2 Schematic diagram of the geometrical tolerance of composite pipe fittings Table 3 The geometric tolerance of the composite pipe fitting is in millimeters Project pipe type Nominal diameter DN range 50~100 125~200 250~300 350~400 450~600 650~800 tolerance End face verticality Q Elbow, different diameter Connector, tee ±0.8 ±1.6 ±2.4 ±3.2 ±4.8 Composite pipe fitting Facial U 45° and 90° elbows, Three links ±1.6 ±3.2 ±4.8 ±6.4 ±9.5 ±12.5

7 materials

7.1 Grassroots 7.1.1 The base material of the composite pipe fittings shall be of the same or similar steel grade, chemical composition and mechanical properties. For carbon steel or low alloy steel, the chemical composition and mechanical properties of the base material should meet the requirements of APISpec5L. PSL2 in.2012. Purchaser In agreement with the manufacturer, the base layer may also select carbon steel and low alloy steel materials as specified in GB/T 12459 or GB/T 13401 and meet the corresponding requirements. standard requirement. 7.1.2 If the composite pipe conveying fluid contains H2S and is in an acidic environment, the base material of the composite pipe fittings shall be determined by agreement between the purchaser and the manufacturer. And whether the welds need to meet the requirements of APISpec5L.2012 Annex H, ISO 15156-1 and ISO 15156-2. 7.2 Inner coating 7.2.1 The inner cladding of composite pipe fittings should preferably use austenitic stainless steel or nickel-based alloy specified by APISpec5LD, and should conform to the API. The chemical composition requirements of Spec5LD, the corrosion-resis...

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