Standard No.:	JB 4732-2005
English Name:	Steel Pressure Vessels - Design by Analysis
Chinese Name:	钢制压力容器——分析设计标准
Professional Classification:	JB    Professional Standard - Machinery
Issued on:	1995-03-07
Implemented on:	1995-10-15
Status:	valid
Language:	English
File Format:	PDF
Word Count:	72000 words
Price(USD):	1200.0
Delivery:	via email in 1 business day

1 Subject Contents and Scope 1.1 Subject content This standard is related to steel pressure vessels based on design by analysis. Design methods are provided based on elastic stress analysis, plastic failure criteria and elastic-plastic failure criteria. More strict requirements are specified for manufacture, inspection and acceptance than GB 150 "Steel Pressure Vessels". This standard shall be implemented with GB 150 simultaneously. Any one of them can be applied, if their own requirements are met. 1.2 Scope 1.2.1 This standard is applicable to: a) Vessels whose design pressures are greater than or equal to 0.1 MPa and less than 100 MPa; b) Vessels whose vacuum degrees are higher than or equal to 0.02 MPa. 1.2.2 The applicable design temperature of this standard shall be lower than the corresponding temperature by which the steel creep controlling its admissible stress intensity. 1.2.3 This standard is not applicable to the following various vessels: a) Vessels in the nuclear-energy plant; b) The compression vessel chamber as an entirety or component in the rotary or reciprocating mechanical equipments (such as pump, compressor, turbine and hydraulic cylinder); c) Frequently-transported vessels; d) Vessels whose internal diameter (as for noncircular section, width, height or diagonal) is less than 150mm; e) Directly-fired vessels. 2 Normative References GB 150 Steel pressure vessels GB/T 196 General purpose metric screw threads - Basic dimensions GB/T 197 General purpose metric metric screw threads-Tolerances GB/T 228 Metallic materials - Tensile testing at ambient temperature GB/T 229 Metallic materials - Charpy notch impact test GB/T 232 Metallic materials - Bend test GB 567 Bursting discs and bursting discs devices GB/T 699 Quality carbon structural steels GB/T 1220 Stainless steel bars GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications GB/T 3077 Alloy structure steels GB/T 3280 Cold rolled stainless steel plate sheet and strip GB 3531 Low alloy steel plates for low temperature pressure vessels GB/T 4237 Hot rolled stainless steel plate sheet and strip GB 6479 Seamless steel tubes for high-pressure for chemical fertilizer equipments GB 6654 Steel plates for pressure vessels GB/T 8163 Seamless steel tubes for liquid service GB 9948 Seamless steel tubes for petroleum cracking GB 12337 Steel spherical tanks GB 13296 Seamless stainless steel tubes for boiler and heat exchanger GB/T 14976 Stainless steel seamless tubes for fluid transport GB 16749 Bellows expansion joints for pressure vessel GB 19189 Quenched and tempered high strength steel plates for pressure vessels JB 4700~4707 Pressure vessel flanges JB 4708 Welding procedure qualification for steel pressure vessels JB/T 4710 Steel vertical vessels supported by skirt JB/T 4711 Coating and packing for pressure vessels transport JB 4726 Carbon and low - alloy steel forgings for pressure vessels JB 4727 Low-alloy steel forgings for low temperature pressure vessels JB 4728 Stainless steel forgings for pressure vessels JB/T 4730.1~4730.6 Nondestructive testing of pressure equipments JB 4733 Explosive stainless clad steel plate for pressure vessels JB 4744 Mechanical property tests of product welded test coupons for steel pressure vessels 3 General Provisions 3.1 The design, manufacture, inspection and acceptance of the vessels at the scope of jurisdiction of this standard shall not only be in accordance with the requirements of this standard, but also the national decrees, legislations and regulations related to the pressure vessels. 3.2 The scope of jurisdiction of this standard means the vessel body and the connecting compression parts connected with it, which is restricted within the following scope. 3.2.1 Connection between the vessel and the outer pipeline: a) The first circumferential welding seam between the vessel nozzle and the outer pipeline; b) The first nipple of threaded connection; c) The first flange sealing surface of flange connection; d) The first sealing surface of special connecting piece or pipe fittings connecting. 3.2.2 Bearing head, flat cover and fastening pieces of the nozzle, hatch and hand-hole, etc. 3.2.3 The welding seams between the non-pressure components and the internal & external surface of the vessels. The components outside of the welding seams, such as the reinforcing ring, lug support, supporting lug and skirt, shall be in accordance with the requirements of this standard or relevant standards. 3.3 The overpressure relief devices directly connected on the vessels shall be in accordance with the requirements of Annex E. Accessories such as instruments connected on the vessels shall be in accordance with relevant standards. 3.4 Qualification and Responsibilities 3.4.1 The design and manufacturing organizations of the vessels must be possessed of sound total quality control system. The design organization shall be possessed of the corresponding design organization instrument of ratification and the manufacturing organization shall be possessed of the corresponding manufacturing license. 3.4.2 The manufacture and application of the pressure vessels must be under the supervision of the safety supervision organization of the Ministry of Labor or authorized inspection organizations. Note: the authorized inspection organizations are authorized by the pressure vessel safety supervision organization of the Ministry of Labor. 3.4.3 Responsibilities of the design organizations 3.4.3.1 The design organizations shall confirm the accuracy and integrity of the design condition analysis (trust deed). 3.4.3.2 The design organizations shall be responsible for the accuracy and integrity of the design document. 3.4.3.3 The design documents of the vessels shall at least contain stress analysis statement and design drawings. 3.4.3.4 The general vessel design drawing shall be sealed with the instrument of ratification mark of the design organizations who apply this standard. 3.4.3.5 The design data shall be kept for at least 7 years. 3.4.4 Responsibilities of the manufacturing organizations

Contents 1 Subject Contents and Scope 1.1 Subject content 1.2 Scope 2 Normative References 3 General Provisions 4 Terms 4.1 Stress intensity 4.2 Gross structural discontinuity 4.3 Local structural discontinuity 4.4 Normal stress 4.5 Shear stress 4.6 Membrane stress 4.7 Bending stress 4.8 Primary stress 4.9 Secondary stress Q 4.10 Peak stress F 4.11 Load stress 4.12 Thermal stress 4.13 Operating cycle 4.14 Stress cycle 4.15 Deformation 4.16 Inelasticity 4.17 Fatigue 5 General Standards of Design by Analysis 5.1 General rules 5.2 Calculation of stress intensity 5.3 Allowable limit of various stress intensity 5.4 Application of plastic analysis 5.5 Three-dimensional stress 5.6 Nozzle transition 6 Materials 6.1 General rules 6.2 Steel plate 6.3 Steel tube 6.4 Forgings 6.5 Stud and nut 7 Shell of Revolution Bearing the External Pressure 7.1 Scope 7.2 Symbol Description 7.3 Circular Cylinder 7.4 Spherical Shell 7.5 Conical Shell 7.6 Forming head 7.7 Connection between the larger end of the conical shell and the cylinder 7.8 Connection between the smaller end of the conical shell and the cylinder 7.9 Coupling of Larger and Smaller Ends 7.10 Reducer Section 8 Shell of revolution bearing the external pressure 8.1 Symbol description 8.2 Calculation of the external pressure cylinder and external pressure sphere 8.3 Design of reinforcing ring of the external pressure cylinder 8.4 Forming head 8.5 conical shell and conical head bearing external pressure 8.6 Axially-compressed cylinder 9 Flat Cover 9.1 Symbol Description 9.2 Thickness of Flat-Cover 10 Opening and Opening Reinforcement 10.1 Symbol description 10.2 Equal-area reinforcement 11 Manufacturing, Inspection and Acceptance 11.1 General Provisions 11.2 Cold and hot forming 11.3 Welding 11.4 heat treatment 11.5 Test plate and sample 11.6 Multi-layer pressure vessel 11.7 Shrunk-fit pressure vessel 11.8 Forged and welded pressure vessel 11.9 Nondestructive testing 11.10 Pressure test and gas-tightness test 11.11 Quality certificate, mark, painting, package and transportation Annex A (Normative) Stress Analysis of Basic Components and Combined Components A.1 Application Scope A.2 Deformation and Stress Analysis of the Basic Components A.3 Stress at the Joint of Various Heads and Cylindrical Shell A.4 The Stress Analysis Method of the Integrally-reinforced Shell Opening A.5 Temperature Stress Annex B (Normative) Experimental Stress Analysis B.1 General Rules B.2 Test Types B.3 Test Methods B.4 Test Results B.5 Tests to Determine Collapse Load Annex C (Normative) Design Basing on Fatigue Analysis C.1 General Provisions C.2 Procedures of Fatigue Analysis C.3 Local Structural Discontinuity C.4 Attenuation Coefficient of the Fatigue Strength of the Fillet Weld C.5 Fatigue Analysis of the Stud C.6 Thermal Stress Ratchet Action in the Shell C.7 Test Methods for Determining the Fatigue Life C.8 Stress Index Method for the Opening Fatigue Evaluation Annex D (Normative) Flanges D.1 General Provisions D.2 Symbol Explanation D.3 Flange Types D.4 Flange Connection D.5 External Pressure Flange Annex E (Normative) E.1 Application scope E.2 Definition E.3 Symbol explanation E.4 General Rules E.5 Calculation of the vessel safety release quantity E.6 Safety valve E.7 Bursting discs devices E.8 The combined device of the safety valve and the bursting discs devices E.9 Installation of the overpressure relief devices E.10 Release pipe Annex F (Normative) F.1 General Rules F.2 Steel plate Annex G (Informative) Annex H (Informative) H.1 Classification and requirements of the welded joints H.2 Other welded connection and requirements Annex I (Informative) I.1 Forms of tube plate connection structure I.2 Symbol description I.3 Stress analysis on the tube plate of the U-tube heat exchanger and other relevant components I.4 Stress analysis on the tube plate of the floating head and packing-gland heat exchanger and other relevant components I.5 Stress analysis on the tube plate of the fixed heat exchanger and other relevant components Annex J (Informative) Stress Analysis of Cylindrical Shell Opening Nozzle J.1 Application Scope J.2 Symbol Explanation J.3 Calculation Procedures J.4 Thickness Adjustment Annex K (Informative) basic requirements for finite element calculation procedures and analysis staff K.1 Calculation Procedures K.2 Analysis Staff