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GB/T 16749-2018 English PDF

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GB/T 16749-2018: Bellows expansion joints for pressure vessel
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GB/T 16749: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 16749-2018English1159 Add to Cart 7 days [Need to translate] Bellows expansion joints for pressure vessel Valid GB/T 16749-2018
GB 16749-1997EnglishRFQ ASK 13 days [Need to translate] [GB/T 16749-1997] Bellows expansion joints for pressure vessel Obsolete GB 16749-1997

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Basic data

Standard ID GB/T 16749-2018 (GB/T16749-2018)
Description (Translated English) Bellows expansion joints for pressure vessel
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J74
Classification of International Standard 23.020.30
Word Count Estimation 58,545
Date of Issue 2018-09-17
Date of Implementation 2019-04-01
Older Standard (superseded by this standard) GB/T 16749-1997
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 16749-2018: Bellows expansion joints for pressure vessel

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Bellows expansion joints for pressure vessel ICS 23.020.30 J74 National Standards of People's Republic of China Replace GB/T 16749-1997 Pressure vessel wave expansion joint Published on.2018-09-17 Implementation of.2019-04-01 State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 General requirements 3 5 Structure, classification and marking 9 6 Material 11 7 Design calculation 14 8 manufacturing 36 9 Inspection and acceptance 42 10 Inspection rules 45 11 Factory requirements 46 12 Storage and installation 46 Appendix A (informative) Expansion section waveform parameters 48 Appendix B (informative) Common bellows materials and approximate control 52

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 16749-1997 "Pressure Expansion of Pressure Vessels". Compared with GB/T 16749-1997, except for editorial repair The main technical changes changed are as follows. a) Expanded the scope of application of the standard. --- Incorporate a wave expansion joint of non-ferrous metal materials by reference to standards (see Chapters 2, 4.1.2, 6.2.1 and 6.2.4); --- Increased waveform and structure of the waveform expansion joint, improved design parameters, and expanded the scope of application of the standard (see 1.2 and 5.1, 1997 editions 1.2, 1.3 and 4.1.1). b) Revised or added provisions for design calculation and thickness limits for waveform expansion joints. --- Revised design calculations for unreinforced U-shaped single or multi-layer bellows and with straight-edged wave expansion joints (see Chapter 7,.1997) Chapter 6 of the annual edition); --- Increased U-shaped, Ω-shaped single or multi-layer bellows design calculations (see Chapter 7); --- Increased the classification of welded joints of wave expansion joints and the high temperature strength reduction coefficient of welded joints (see 4.3.1 and 4.3.3); --- Increased the requirement for the axial displacement (axial or axial compression) of the bellows geometry (see 7.8.1); --- Increased the waveform structure and thickness range requirements of the pressure vessel expansion joint (see 5.1 and 7.2.1). c) Revised the requirements for manufacturing, testing and acceptance of wave expansion joints. --- Propose the general requirements of the wave expansion joint, clear the basic requirements of material selection, welding, non-destructive testing (see Chapter 6, 8.2, 8.5.1 and 8.5.2, Chapters 5, 7.2, 7.5.1.1 and 7.5.1.2) of the.1997 edition; --- Revised the dimensional tolerance of the U-shaped wave; increased the dimensional tolerance of the Ω wave; proposed welding and lossless for different welded joints Test methods, non-destructive testing ratio, qualification level and bellows heat treatment regulations (see 8.7, 8.5.3, 8.5.4, 8.5.5, 8.5.6) And 8.3,.1997 editions 7.5.2, 7.5.3, 7.5.4 and 7.3); --- Revised the provisions for the thickness reduction of bellows (see 4.4 and 8.7.1.1,.1997 edition 3.3); --- Added X-ray computer-aided imaging detection based on the original standard non-destructive testing film sensitization (RT) (see 8.5.3) And 8.5.5.1); --- Increased the connection between the bellows and the end tube (or device housing) (see 4.3.1.3). d) Added terminology and definitions, revised qualifications and responsibilities for users, design, manufacturing, etc. (see Chapters 3, 4.2.1 and 4.2.2,.1997) Year edition 3.1). e) Revised the bellows type and expansion joint marking (see 5.2,.1997 edition 4.2.2). f) Revised the contents of the appendix. --- Amend the contents of Appendix A to. bellows waveform parameters (see Appendix A,.1997 edition of Appendix A); --- Delete the original standard Appendix B (see Appendix B of the.1997 edition); --- Added materials commonly used for bellows and approximate control content (see Appendix B). This standard is proposed and managed by the National Boiler and Pressure Vessel Standardization Technical Committee (SAC/TC262). This standard was drafted. Hefei General Machinery Research Institute Co., Ltd., China Special Equipment Inspection and Research Institute, Sinopec Engineering Construction Company, China Ryukyu Engineering Co., Zhejiang University of Technology, Nanjing Chenguang Dongluo Bellows Co., Ltd., Nanjing Sanbang New Materials Technology Co., Ltd. Division, Qinhuangdao Tide Pipe Industry Technology Co., Ltd., Shijiazhuang Juli Technology Co., Ltd. The main drafters of this standard. Cai Shanxiang, Shoubinan, Zhu Guodong, Cui Jun, Guo Pengju, Chen Zhaohui, Xu Xiaolong, Xing Xianning, Lu Zhiming, Zhu Jinhua, Chen Lisu, Huang Wenling, Zhou Jingrong, Chen Siping, Zhu Huihong. The previous versions of the standards replaced by this standard are. ---GB 150-1989; ---GB/T 16749-1997. Pressure vessel wave expansion joint

1 Scope

1.1 This standard specifies the terms and definitions, general requirements, classification and marking of the pressure vessel expansion joint (hereinafter referred to as the wave expansion joint). Materials, design, manufacturing, inspection and acceptance, inspection rules, factory requirements, storage and installation. 1.2 The pressure vessel wave expansion joints specified in this standard are applicable to. a) The pressure vessel is a single-layer or multi-layer wave expansion joint that is not reinforced U-shaped, reinforced U-shaped or Ω-shaped, and is subjected to internal pressure or external pressure, wherein The bellows complies with the provisions of 7.2.1. b) The design pressure is not more than 12 MPa. c) The design temperature applies to the following conditions. 1) The steel does not exceed the allowable temperature range of the materials listed in GB/T 150.2-2011; 2) Other metal materials are determined according to the permissible temperature of the materials listed in the corresponding reference standards. d) The nominal diameter is not more than 4000mm. e) The product of design pressure (MPa) and nominal diameter (mm) is not more than 2.7×104. 1.3 Wave expansion joints beyond the range of 1.2 can be manufactured by reference to this standard. 1.4 This standard does not apply to the following waveform expansion sections. a) a wave expansion joint for direct flame heating; b) non-metallic waveform expansion joints; c) A wave expansion joint in the nuclear power plant where there is a risk of neutron radiation damage failure.

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 150-2011 (all parts) pressure vessel GB/T 713 steel plate for boiler and pressure vessel GB/T 985.1 Recommended groove for gas welding, electrode arc welding, gas shielded welding and high energy beam welding GB/T 985.2 recommended groove for submerged arc welding GB/T 1800.1-2009 Geometrical Product Specifications (GPS) Limits and fits. Part 1. Tolerances, deviations and fits basis GB/T 1800.2-2009 Geometrical Product Specifications (GPS) Limits and fits. Part 2. Standard tolerance classes and Limit deviation table GB/T 3098.1 Fastener mechanical properties bolts, screws and studs GB/T 3098.2 fastener mechanical properties nut GB/T 3098.6 Mechanical properties of fasteners Stainless steel bolts, screws and studs GB/T 3274 carbon structural steel and low alloy structural steel hot rolled steel sheet and strip GB/T 3280 stainless steel cold rolled steel plate and strip GB/T 3621 titanium and titanium alloy sheet GB/T 3880 (all parts) General industrial aluminum and aluminum alloy sheets, strips GB/T 5310 seamless steel pipe for high pressure boiler GB/T 6479 seamless steel pipe for high pressure fertilizer equipment GB/T 8163 seamless steel pipe for conveying fluid GB/T 9948 seamless steel pipe for petroleum cracking GB/T 14976 stainless steel seamless pipe for fluid transportation GB/T 24511 stainless steel and heat-resistant steel plates and strips for pressure equipment NB/T 47011 Zirconium pressure vessel NB/T 47013.2 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 Non-destructive testing of pressure equipment - Part 4. Magnetic particle testing NB/T 47013.5 Non-destructive testing of pressure equipment - Part 5. Penetration testing NB/T 47014 Pressure welding equipment welding process evaluation JB/T 4711 Pressure Vessel Coating and Transport Packaging JB/T 4734 aluminum welding container JB/T 4745 titanium welding container JB/T 4756 nickel and nickel alloy pressure vessel YB/T 5353 corrosion resistant alloy hot rolled sheet YB/T 5354 corrosion resistant alloy cold rolled sheet TSG21-2016 Safety Regulations for Fixed Pressure Vessels

3 Terms and definitions

The following terms and definitions as defined in GB/T 150-2011 apply to this document. 3.1 Nominal diameter nominaldiameter DN It is expressed in the diameter of the container cylinder and is divided into two series. inner and outer diameter. It consists of the letter DN and the dimensionless integer number, which represents the specifications of the bellows. Note 1. The rolled and forged end pipe (cylinder) has the inner diameter (mm) as the nominal diameter of the bellows. Note 2. Pipe end pipe (cylinder), the outer diameter (mm) is used as the nominal diameter of the bellows. 3.2 Bellows belows The flexible element of the wave expansion joint consists of one or several identical corrugations and straight straight sections. 3.3 Ripple convolution The smallest flexible unit of the bellows. 3.4 End straight section There is no corrugated part at the end of the bellows, that is, a straight tube that does not wave. 3.5 Expansion joint expansionjoints A pressure-receiving device containing a bellows for absorbing dimensional changes such as equipment (or piping) caused by thermal expansion and contraction. 3.6 Reinforcement piece A component used to reinforce U-shaped and omega-shaped bellows to enhance the pressure resistance of the bellows. Note. The reinforcement consists of a reinforcement ring (3.7) and an equalization ring (3.8). 3.7 Reinforced ring reinforcementrings It is installed on the corrugated root of the bellows and is made of pipe or bar to enhance the pressure resistance of the bellows. 3.8 Equilibrium ring equalizingrings It has a "T"-shaped cross-section and is located in the bellows (peak) of the bellows. 3.9 Hoop collars A cylinder or ring used to reinforce the straight section of the bellows and a barrel or ring that conforms to the trough profile of the straight side to enhance the straight edge section or the corrugation withstand capability. 3.10 Auxiliary cuff asstingcolars A ring that is placed on the straight section for ease of soldering. 3.11 Lining liner A liner for maintaining a smooth flow of the medium and reducing friction between the inner wall of the bellows and the medium. 3.12 Form as-formedcondition After the bellows is formed, it is not dissolved or annealed, and has a cold hardening state. 3.13 Heat treated heat-treated condition After the bellows is formed, it is solid solution or annealed, and has no cold work hardening state. 3.14 Neutral position The bellows is in a free state with a position of zero displacement.

4 General requirements

4.1 General 4.1.1 The design, manufacture, inspection and acceptance of the wave expansion joint of the pressure vessel shall comply with the provisions of this standard, and shall also comply with the relevant regulations promulgated by the State. Laws, regulations and safety technical specifications. 4.1.2 The use of aluminum, titanium, nickel and nickel alloys, zirconium and other metal pressure vessel expansion joints, its design, manufacture, inspection and acceptance delimiter In addition to the provisions of 4.1.1, the corresponding requirements of JB/T 4734, JB/T 4745, JB/T 4756, and NB/T 47011 should also be met. 4.1.3 The design and manufacturing unit of the wave expansion joint should establish a sound quality management system and operate effectively. 4.1.4 The wave expansion joints within the jurisdiction of TSG21-2016 shall be subject to the supervision of the special equipment safety supervision agency. 4.1.5 Wave expansion joints that cannot be designed and calculated in accordance with this standard and the corresponding reference standards may be in accordance with 4.1.6 of GB/T 150.1-2011. The prescribed method is designed. 4.2 Qualifications and responsibilities 4.2.1 Qualification The wave expansion joints within the jurisdiction of TSG21-2016 shall have the following qualifications for the manufacturing unit and personnel. a) The wave expansion joint manufacturing unit shall hold the corresponding special equipment manufacturing license. Establish expansion according to TSG21-2016 requirements Quality assurance system and management system and effective operation, the manufacturing unit and its main person in charge should cope with the pressure vessel expansion The manufacturing quality of the festival is responsible. b) The welding operator of the wave expansion joint (referred to as the welder) shall obtain the quality and technical supervision department according to the provisions of TSG21-2016. After the "Special Equipment Operator Certificate" of the corresponding project is issued, the welding work within the scope of the qualified project can be performed within the valid period. c) Non-destructive testing personnel of the wave expansion joint shall obtain the corresponding certificates issued by the quality and technical supervision department in accordance with the provisions of TSG21-2016. After the qualification certificate, the non-destructive testing work corresponding to the type and technical level of the qualification certificate can be undertaken. 4.2.2 Responsibilities 4.2.2.1 Responsibilities of the user or design client The user or design client of the wave expansion joint shall submit the design conditions of the wave expansion joint to the design unit in formal written form. Design strip The pieces include at least the following. a) Main standards, specifications and design parameters (including design pressure, design temperature, nominal diameter, design) based on the design of the wave expansion joint Displacement and material requirements); b) Operating parameters of the wave expansion joint (including working pressure, working temperature, medium composition and characteristics, working displacement and operating fatigue times) number); c) Other conditions required for the design. 4.2.2.2 Design unit (department) responsibilities The responsibilities of the design unit (department) shall comply with the following provisions. a) The design unit (or department) and the principal responsible person shall be responsible for the design quality of the wave expansion joint, and the integrity and positiveness of the design documents. Responsible for authenticity; b) The design file of the wave expansion joint shall include at least the design calculations, design drawings, and manufacturing technical conditions (including inspection and test). Seek), if necessary, installation and use of maintenance instructions; c) The design unit (or department) should consider the failure mode that may occur during the use of the wave expansion joint, and propose to prevent failure. Measures, when necessary, to issue a risk assessment report to the user (when relevant standards or design client requests); d) The design unit (or department) shall maintain all design documents within the design life of the wave expansion joint. 4.2.2.3 Manufacturing unit responsibilities The responsibilities of the manufacturing unit shall comply with the following provisions. a) It should be manufactured according to the requirements of the design documents. If the original design needs to be modified, it should be written in the agreement of the original design unit. Documents and detailed records of the changes; b) A sound quality plan should be developed prior to manufacture, including at least manufacturing process control points, inspection items and qualification indicators; c) Possible failure modes and preventive measures proposed in the waveform expansion section risk assessment report issued by the design unit (or department) Reflected in the product quality certification document; d) The quality inspection department of the manufacturing unit shall, in the manufacturing process of the wave expansion joint and after completion, be in accordance with this standard, the drawing requirements and the quality plan. It is required to carry out various inspections and tests on the wave expansion joints, issue corresponding reports, and be responsible for the correctness and completeness of the report; e) At least one of the following technical documents shall be kept for each waveform expansion joint product for the design life. 1) Quality plan; 2) manufacturing process drawings or manufacturing process cards; 3) Product quality certification documents; 4) Material quality certification documents and material tables; 5) Welding process and heat treatment process documentation; 6) Inspection, inspection and test records during and after the manufacturing process; 7) Original design drawings and as-built drawings of the expansion joints. 4.3 Welding joint classification and welded joint coefficient 4.3.1 Welding joint classification 4.3.1.1 Expansion Joints The welded joints between the pressure components are divided into four categories. A, B, C, and D, as shown in Figure 1. The welded joints are classified as follows. a) longitudinal butt joints of bellows, end pipes (including ferrules and stiffeners) longitudinal butt joints, splitting all longitudinal splicing joints, All belong to Class A welded joints; b) Circumferential butt joints of bellows and end pipes (or equipment casings) (plug welded butt joints, end welded butt joints, straight sides of bellows) The grooved butt joint of the segment insert/coat (see welding type 3, type 4, type 5 in Table 1), the bellows is connected to the bellows The circumferential butt joint, the end pipe and the circumferential joint of the equipment casing are all B-type welded joints; c) angular joints, ferrules, stiffeners and bellows or end pipes of the straight section of the bellows and the end pipe (or equipment casing) The housing is connected to the angular joint (see welding type 1, 2 in Table 1), and the flange is connected to the end tube (or equipment housing). Is a Class C welded joint; d) The flange and the bellows, the joint connecting the end pipe and the head are all Class D welded joints. 4.3.1.2 The welded joint of the non-pressurized component and the pressed component is an E-type welded joint, as shown in Figure 1. Description. 1---end plate; 2--- bellows; 3---end tube (or device housing); 4---flange; 5---plug (flange); 6---support ring; 7---liner; 8---outer sheath. Figure 1 Welding joint classification 4.3.1.3 The connection between the straight side of the bellows and the end pipe (or equipment housing) and the welded joint are shown in Table 1. Table 1 Corrugated pipe straight edge and end pipe (or equipment shell) joint weld Serial number Welding type Usual design Variant (allow A~D combination) Bogan Reinforced Hoop Accessory Hoop ABC (single) D (two) Coat/fillet weld Interpolation/fillet weld Coat/bevel weld Interpolation/groove weld Butt weld - - The connecting member on the opposite side of the pressure side of the bellows and the side of the ferrule that is in contact with the bellows and the straight side section should be rounded or chamfered. Corrugated pipe joint welds with ferrules shall comply with. --- If it is a fillet weld, the weld height "a" should conform to the formula. a ≥ 0.7 nt; --- If the length of the straight section of the bellows is Lt ≥ 0.5 ntDb, it is recommended to set the ferrule; ---The ferrule should be fixed axially by welding or mechanical means. Note. For the insert (or jacket) groove weld joint (welding type 3, type 4), refer to GB/T 3375 lock bottom butt joint (V-shaped groove). 4.3.2 Welded joint coefficient 4.3.2.1 The welded joint coefficient φ shall be determined according to the weld form of the butt joint and the length ratio of the non-destructive test. Subscripts b, c, f, p and r Representing bellows, ferrules, fasteners, tubes and reinforcement materials, respectively; 4.3.2.2 The welded joint coefficient of the steel pressure vessel expansion joint is selected according to Table 2. Table 2 Welding joint coefficient φ Welding joint form, non-destructive testing, local non-destructive testing Double-sided welded butt joint and full penetration butt joint equivalent to double-sided welding 1.0 0.85 Single-sided butt joints along the entire length of the weld without a backing plate - 0.70 4.3.2.3 The welded joint coefficient of non-ferrous metals such as aluminum, titanium, nickel, zirconium and their alloys is in accordance with JB/T 4734, JB/T 4745, JB/T 4756, NB/T 47011 related regulations. 4.3.3 Welding joint high temperature strength reduction coefficient 4.3.3.1 Scope of application The high-strength strength reduction coefficient w of the welded joint is suitable for the design temperature ≥ 510 °C, due to the long-term effect of continuous load such as internal pressure. The high-strength strength of the welded joint is lower than that of the base metal, so in the design calculation of Chapter 7, the bellows and the reinforcing member that are subjected to the internal pressure are caused. The circumferential film stress should satisfy the allowable stress [σ]t and the longitudinal welded joint coefficient φ product φ[σ]t, and should also be multiplied by the high temperature drop of the welded joint. The low coefficient w is φ[σ]tw. 4.3.3.2 w selection rules w Use the following rules. a) welded joint high temperature strength reduction coefficient w, see Table 3; b) For materials other than Table 3, when the design temperature is not higher than 510 °C, take w=1; when the design temperature is 815 °C, take w=0.5; The inter-temperature value is calculated by the difference method w; when the design temperature is higher than 815 ° C, the designer determines w; c) Exceeding one of the following conditions, excluding the welded joint high temperature strength reduction factor w. 1) Below creep temperature, for CrMo steel, tough ferritic heat resistant steel, 300 series austenitic stainless steel, 800 nickel base The long-term working strength of gold and 600 nickel-base alloy welded joints is not lower than the strength of the base metal; 2) The lower limit of allowable stress, yield strength and tensile strength of the bellows material at all temperatures is in accordance with TSG21-2016. GB/T 150-2011 and corresponding material standards; material design temperature range does not exceed the allowable temperature of steel; 3) The bellows welded joint is a full penetration structure, the welding material meets the requirements of the welding material standard and this standard, and the weld metal is guaranteed. Tensile properties, impact properties or other properties are not lower than the lower limit specified in the parent metal standard, and comply with TSG21-2016, GB/T 150-2011 regulations; 4) Design pressure and design temperature fluctuations do not exceed the design range. Table 3 welded joint high temperature strength reduction coefficient w material Temperature/°C 427 454 482 510 538 566 593 621 649 677 704 732 760 788 816 CrMo steel a~c 1 0.95 0.91 0.86 0.82 0.77 0.73 0.68 0.64 - - - - - - CSEF(NT)c~e - - - 1 0.95 0.91 0.86 0.82 0.77 - - - - - - CSEFc, d(PWHT) - - 1 0.5 0.5 0.5 0.5 0.5 0.5 - - - - - - Metal-free 300 series austen Stainless steel and 800 nickel base alloy and 600 nickel base Gold self-welding f - - - 1 1 1 1 1 1 1 1 1 1 1 1 Filled metal 300 series austen Stainless steel and 800 nickel base alloy - - - 1 0.95 0.91 0.86 0.82 0.77 0.73 0.68 0.64 0.59 0.55 0.5 The temperature listed in this table is only used for the high-temperature strength reduction coefficient w of the welded joint of the corresponding material, and the upper limit of the use temperature of the material is in accordance with GB/T 150.2-2011. The provisions of the material standards. The...

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