This standard specifies the basic requirements for the design, manufacturing, inspection and acceptance of steel pressure vessels for micro air compressors. This standard applies to pressure vessels for micro air compressors with a design pressure less than 1.6 MPa and a nominal volume greater than or equal to 25 L and less than 450 L. The operating temperature range of pressure vessels is 0~200℃. Other pressure vessels for compressors whose design pressure and nominal volume are equivalent to those specified above may be implemented with reference to this standard. JB/T 6539-1992 Steel pressure vessels for micro air compressors JB/T6539-1992 Standard download and decompression password: www.bzxz.net
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J72 | | tt | | JB | tt||Ministry of Mechanical and Electronic Industry of the People's Republic of China 1993-07-01 Implementation Release Mechanical Industry Standard of the People's Republic of China Steel Pressure Vessels for Micro Air Compressors 1 Topic Content and scope of application JB/T6539-92 This standard specifies the basic requirements for the design, manufacturing, inspection and acceptance of steel pressure vessels for micro air compressors (hereinafter referred to as "pressure vessels") . This standard applies to pressure vessels for micro air compressors with a design pressure less than 1.6MPs and a nominal volume greater than or equal to 25L and less than 450L. The operating temperature range of pressure vessels is .0~200℃. Other pressure vessels for compressors whose design pressure and nominal volume are equivalent to those specified above may be implemented with reference to this standard. 2 Reference standards GB150 GB699 GB700 GB713 GB912 GB-985 GB986||tt ||GB3077 GB.3274 GB3323 GB5681 GB6479 GB6653 GB6654 GB8163||tt ||JB1152 JB2536 JB4708 JB/T:4709 JB/T6441 3 terminology 3.1 Work pressure|| tt||Copper pressure vessels Technical conditions of high-quality carbon structural steel Carbon structural steel Carbon steel and low alloy structural steel steel plates for boilers Carbon structural steel and low Alloy structural steel hot-rolled thin steel plate and steel strip gas welding, manual arc welding and gas shielded welding basic types and dimensions of weld grooves basic types and dimensions of submerged submersible welding grooves technical conditions of alloy structural steel Carbon structural steel and low-alloy structural hot-rolled thick pin plates and steel strips Melt-welded butt joints Radiographic phase and quality classification Hot-rolled steel strips for pressure vessels High-pressure seamless steel pipes for fertilizer equipment||tt| |Steel plates for welded gas cylinders Carbon steel and low alloy steel thick steel plates for pressure vessels Seamless steel pipes for conveying fluids Butt welds for boilers and steel pressure vessels Ultrasonic flaw detection Pressure vessel painting and packaging , Yunfu Steel pressure vessel welding procedure qualification Steel pressure vessel welding regulations Safety valve for compressors refers to the pressure vessel under normal operating conditions The gauge pressure inside, 3.2 Rated working pressure refers to the pressure specified by the pressure vessel model, and its value is equal to the rated exhaust pressure of the compressor. 3.3 Maximum working pressure Ministry of Mechanical and Electronics Industry approved on 1992-12-25 for implementation on 1993-07-01 1 JB/T6539-92 refers to normal work During the process, the pressure vessel may reach as high as the gauge pressure. 3.4 Design pressure refers to the pressure used to determine the initial thickness of the pressure vessel shell. Its value is equal to 1.05 to 1.1 times the rated working pressure, and shall not be lower than the maximum working pressure of the compressor. 3.5 Design temperature refers to the highest temperature that the pressure vessel shell may reach under normal operating conditions. 3.6 Test temperature refers to the temperature of the pressure vessel during the pressure test. 3.7 Thickness 3.7.1 The additional thickness C is calculated according to formula (1): CC, + C, Where: C - the thickness negative tolerance of the steel plate or steel pipe, mm: C, - --Corrosion allowance. For sleeved lubrication compressor C, =0.5mm; for oil-free lubrication compressor C, =1.0mm, 3.7.2 Calculated thickness 8 refers to the thickness calculated according to the relevant formulas of this standard. 3.7.3 Design thickness 84 refers to the sum of calculated thickness and corrosion allowance. 3.7.4 Nominal thickness 8 (1 refers to the design thickness plus the negative deviation of the steel thickness and then circled upward to the thickness of the steel standard specification, that is, the thickness marked on the design drawing . 3.7.5 Effective thickness 8 refers to the nominal thickness minus the additional amount of steel thickness. The manufacturing unit should determine the processing allowance based on the manufacturing process conditions and the actual thickness of the steel to ensure the actual thickness of each part of the pressure vessel product. Not less than the design thickness. 4 General provisions Pressure vessels shall be manufactured in accordance with the provisions of this standard and in accordance with the drawings and technical documents or agreements approved by the prescribed procedures, 4.1 Delimitation scope||tt ||This standard defines the scope of pressure equipment as follows: 4.1.1 The first flange sealing surface of the nozzle. 4.1.2 The first threaded joint of the nozzle 4.1.3 The first pass of the nozzle. Circumferential welds. 4.1.4 Pressure control, safety relief devices and instruments directly installed on the pressure vessel shall also comply with the relevant provisions of this standard. 4.2 Allowable stress refers to the pressure. The strength data of steel and bolts are divided by the safety factors in Table 1 and Table 2, and the smaller value is taken. Table 1 Strength performance Carbon cable steel, low alloy steel| |tt||2 Usually high tensile strength An n≥3.0 all Reporting point at permanent or design temperature, into. Number n≥1.6 steel carbon cable pin low alloy steel, alloy Steel 4.3 weld coefficient Number of bolt diameter mm GM22 M22~M48 SM22 M22~M48||tt ||JB/T653992 Table 2 Heat treatment status Hot rolling, normalizing Normalizing, quenching and tempering Seam location and non-destructive testing requirements are selected. 4.3.1 Double-sided welding or full penetration butt weld equivalent to double-sided welding: 100% non-destructive testing 4=1. 0 Partially non-destructive. Flaw detection 4= 0. 85 Safety factor of care point under design layout 2.7 2.5 3. 5||tt| 0 | |tt||g=0.80 4.3.3 Single-sided butt weld, no backing plate local non-destructive testing 4=0.70 4.3.4 for Seamless steel pipe used as cylinder: 4.4 welds g1.0 The welds of pressure vessels are divided into four categories: A, B, C and D, as shown in Figure 1 Show. 4.4.1 D Figure 1 a. The longitudinal butt weld of the shell belongs to category A; b. The circumferential butt weld of the shell belongs to Category B; The welds connecting the flange and the nozzle, the flat head and the shell belong to Category C; c. d. Nozzle , The welds connected to the shell belong to category D. 4.4.2 The type of welded joints of pressure vessels should comply with the requirements of GB985 and GB986 and design drawings. 4.5 Pressure test 4.5.1 After the pressure vessel is manufactured, a hydraulic pressure test should be carried out. The hydraulic test pressure P is 1.5 times the design pressure. 4.5.2 During the hydraulic test, the film stress of the pressure vessel shell should not exceed 90% of the service strength c of the material at the test temperature. And calculate according to formula (2) where, -|| tt||=D+8.) 28.4 effective wall thickness of pressure vessel shell mm; (2) 3 — Weld coefficient of pressure vessel shell. 4.6 Qualifications and Responsibilities of Design and Manufacturing Units JB/T6539-92 4.6.1 The design and manufacturing units of pressure vessels must have a sound quality assurance system, and the design unit shall have "Pressure Vessel Design Unit Approval", and the manufacturing unit should have a "Pressure Vessel Manufacturing License". 4.6.2 Design unit responsibilities a. b. C. The design unit shall be responsible for the accuracy and completeness of the design documents; the design documents of the pressure vessel shall at least include design calculations and design drawings: the general drawing shall be stamped with the approval letter of the pressure vessel design unit. 4.6.3 Responsibilities of the manufacturing unit 4.6.3.1 The manufacturing unit shall manufacture according to the design drawings. During the manufacturing process, various specific inspections and tests on pressure vessels shall be carried out in accordance with the provisions of this standard and drawings, an inspection report shall be submitted, and the manufacturer shall be responsible for the accuracy and completeness of the report. 4.6.3.2 The manufacturing unit should have the following relevant technical documents for pressure vessels of different specifications, and the technical documents should be kept for at least 5 years. a. b. c. d. e. Main pressure component material certification: General manufacturing process Card: Welding procedure qualification report and general welding procedure regulations: welding records, inspection records and test reports; completion drawings. 4.6.3.3 After passing the inspection, the pressure vessel must fill in the product certificate and quality certificate. The product certificate should have the supervisory inspection seal of the pressure vessel supervisory inspection department. 5 Types and Basic Parameters 5.1 Types and Models 5.1.1 The gas tank model consists of pinyin letters and numbers: C 0 -0 Rated working pressure, MPa Volume, L Arrangement form, W represents horizontal and vertical gas storage tank code 5.1.2 Others The compilation of pressure vessel models shall be in accordance with relevant technical documents. 5.2 Pressure parameters The rated working pressure of the pressure vessel is selected according to Table 3. Table 3 0. 25 .0.4 0.5 0.7 1.0 1. 25 5.3 Simplified Diameter When the cylinder is rolled with steel plate, its nominal diameter is selected from Table 4. At this time, the nominal diameter refers to the inner diameter, 5.3.1 Table 4 150| |tt||5.3.2 4 200 250 300 350 400 450| |tt||500 MPa 1.4 mm 550 When steel pipe is used as the screen body, the simplified nominal diameter is selected according to GB8163. At this time, the simplified nominal diameter refers to the outer diameter of the steel pipe. 6 Materials 6.1 General requirements JB/T6539-92 6.1.1 Steel plates and steel pipes used to manufacture pressure vessels should have a material certificate (or copy), manufacturing unit Acceptance shall be carried out according to the certificate. 6.1.2 The steel used for pressure components of pressure vessels shall comply with the provisions of this chapter. Substitution of other materials is allowed if their properties are not lower than those specified in this chapter. 6.1.3 The steel materials and corresponding welding materials listed in this chapter should also comply with the requirements of each corresponding standard. 6.2 Steel Plate 6.2.1 When carbon cord boiling steel plate and carbon killed steel plate are used to make pressure vessels, their applicable scope shall be as specified in Table 5. Table 5 Steel No. Q235-AF(A3F) Q235A(A3) Q235B Q235C||tt| |6.2.2 Steel Design pressure MPa ≤0.6 ≤1.2 1.6 ≤2.5 Use mix c 0~250 0~350 Steel grade, usage status and allowable stress of the steel plate for pressure vessels Table 6 specifies. Table 6 Thick No. Q235-A, F (A3F) Q235-A (A3)|| tt||Q235-B Q235-C 20HP 20g 20R 16MaR Steel Plate Standard GB912 GB3274 GB912 GB3274 GB912 GB3274||GB912 GB3274 GB6653| |tt||GB713 GB6654 GB5681 GB6654 Usage status Carbon Hot Rolled|| tt||hot hot rolled hot: rolled hot hot rolled||tt ||rolled or normalized low hot hot rolled rolled or normalized| |tt||mm Prime Pot 3~4 4.56 3~4 4.5~16||tt ||3~4 4.5~16 3~4 4.5~16 3~5.5 6~16 Combined Gold 4 Normal temperature strength index MPa Steel plate 375 390 400 | Steel Plate 510 MPa 235 245 350 345 Max plate Thick mm 12 16 20 32 Pressure vessel Limited medium||tt| |Air Allowable stress MPa20 at the following elevation (C) 133 100 113 125 130 170 150 132 200bZxz.net 105 105 116 120|| tt||123 5 pin number 10 20 16Mn 6. 3. 2 Performance. Steel pipe standards GB8163 GB8163 GB6479 JB/T6539-92 Table? Thickness am Carbon pot 10 ≤10 Low Combined Gold ≤16 Normal wet strength index a. MPa steel pipe 335 390|| tt||steel steel pipe 490 MPa 205 245 320||tt| |Allowable stress MPa≤20 at the following temperature (C) 112 100 130 163 150 108 200 101 123 159 Carbon steel and low alloy steel pipes for pressure vessels, pressure vessel manufacturing units should Take one bolt from each batch and recheck its mechanical bolts 6.4 The steel number and allowable stress of the bolts are as specified in Table 8. Table 8 Bolt specifications Steel No. Q235A(A3, AY3) 35 30CrMoA Welding Material 6.5 6.5.1 6. 5.2 steel steel plate standard GB700 GB699 GB3077 usage status carbon Hot Milk Positive Fire Paper Quality Tune Recommended pressure vessel welding materials are shown in the table 9. mm Primary Steel Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.