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JB | for refrigerant egquipment2003-03-17 Released
Implemented on 2003-07-01
National Economic and Trade Commission Released
Announcement of the National Economic and Trade Commission of the People's Republic of China
200 Three-year No. 32
Published 3 Boiler and Pressure Vessel Industry Standards
The State Economic and Trade Commission approved 3 boiler and pressure vessel industry standards including "Pressure Vessels for Refrigeration Devices", which are now announced. Since 2003 Effective from July 1st. The above standards are published and distributed by the National Boiler and Pressure Vessel Standardization Technical Committee.
Attachment: 3 Boiler and Pressure Vessel Industry Standard Names and Numbers March 17, 2003
Attachment:
Serial Number
2||tt| |3
3 boiler and pressure vessel industry standard names and numbers standard names
pressure vessels for refrigeration units
spiral plate heat exchangers
pressure vessel coating and transportation Packaging
Standard number
JB/T 4750—2003
JB/T4751—2003
JB/T4711—2003
replaces the standard number||tt ||JB 6917—1998
JB 2536-1980
Item
3 Pressure vessels for refrigeration equipment
JB/T 4750—2003
Record| |tt||JB/T4750--2003 "Pressure Vessels for Refrigeration Devices" Standard Interpretation 58
Foreword
1
2
3
Scope
Normative reference documents
-General provisions
4 materials
5
Cylinder
6 heads
7 Openings and opening reinforcements for pipes
8 Flanges
9 Manufacturing, inspection and acceptance
Appendix A (Normative Appendix)
Appendix B (Normative Appendix )
Appendix C (informative appendix)
Appendix D (informative appendix)
Appendix E (informative appendix)
Appendix F (normative appendix)| |tt||Supplementary provisions for materials,
Safety accessories
Item
Times
Thermal physical parameters and safety classification supports of commonly used refrigerants·||tt ||Tube sheets, baffles, support plates, baffles, tubes and tube bundles JB/T 4750--2003
3
11
15
20| |tt||20
20
20
30
33
37
·40
44|| tt||Requirements for liquid ammonia and its filling procedures for pressure vessels used in steel ammonia refrigeration units 57
This standard replaces JB6917-1998.
Foreword
Compared with JB6917--1998, this standard mainly has the following changes: JB/T 4750-2003
Changes the design temperature range from "-19℃~200℃ ( Minimum evaporation temperature -50℃)" was changed to "design temperature not higher than 200℃";
Moved the refrigerant type, refrigerant-related thermal physical parameters and refrigerant safety from Chapter 3 to Appendix C; Regarding the design temperature of the low-pressure side, change "Vasters with operating temperatures below -19°C on the low-pressure side belong to low-temperature and low-stress conditions, so their design temperature is determined based on their maximum operating temperature plus 50°C" to "When the operating temperature is low At 0℃, if the primary overall film stress at the service temperature is less than or equal to 1/6 of the material’s normal temperature yield point and not greater than 50MPa, the design temperature shall be the algebraic sum of the service temperature and 50℃”; - in 3.6.2 Add the requirement that "the design thickness should be indicated on the drawing"; - cancel the requirement for allowable axial compressive stress; - cancel the requirement that "for containers with design pressures not higher than 0.2MPa for group A1 refrigerants in Table 2, they can be airtight "The air tightness test replaces the hydraulic test" and the provisions of the vacuum test;
Change "the air tightness test pressure is equal to the design pressure" to "the air tightness test should be carried out after the pressure test is qualified, and indicate it on the drawing "Test pressure, test medium and inspection requirements"; - Cancel the three steel grades Q235-AF, Q235A, and 20g in the steel plate; use Q235-B "for flanges, flange covers, tube sheets and similar pressure components, The design pressure is less than or equal to 4.0MPa, the design temperature is -19℃~200℃" is changed to the design pressure is less than or equal to 3.0MPa, the design temperature is 0~200℃"; the Q235-C steel plate thickness is less than or equal to \32mm. is \30mm"; change Q235-C "When used for flanges, flange covers, tube sheets and similar pressure components, the design pressure is less than or equal to 4.0MPa, the design temperature is -19℃~~200℃" to design The pressure is less than or equal to 3.5MPa, and the design temperature is 0~200℃";
- cancel TU, TU2, TP1, TP2, H96, H62, HSn62-1 and other grades of copper pipes, and add HAL77 2. BFe30 -1-1, BFe10-1-1 and other brands of copper pipes;
—Cancel all the aluminum pipe brands listed in the original table C1 and change them to 1060, 1050A, 1200, 3003, 5052, 5A03, 5A05 , 5083 and other brands of aluminum tubes;
- Cancel the design calculation of the external pressure cylinder with a reinforced ring; Cancel the original pictures 4 and 8: - The minimum thickness of the oval and disc-shaped heads after stamping "Should be no less than the design thickness minus the negative deviation of the steel plate thickness" is changed to "Ensure that the minimum thickness of the finished product of the head and cylinder is not less than the design thickness of the component"; - Change "Use the chord length equal to 3/4 of the design inner diameter D of the head; "Use an inner sample to check the shape deviation of the inner surface of the oval and dish-shaped heads. The maximum gap should not be greater than 1.25% D" was changed to "Use a gap sample with a chord length equivalent to the inner diameter of the head D: to check the oval and dish-shaped heads." The shape tolerance of the inner surface of the head, the maximum gap between the template and the inner surface of the head, the outer convexity shall not be greater than 1.25%D;, and the inner concave shall not be greater than 0.625%D”;
JB/T4750—2003||tt ||-Change "The depth of longitudinal wrinkles in the straight edge part of the head should not be greater than 1.5mm" to "Longitudinal wrinkles are not allowed in the straight edge part of the head"; add other shapes and size tolerances of the head that should comply with JB/ T4746-2002 "Relevant Provisions" requirements; - Change the sample for testing the edge E formed by welding in the circumferential direction from "the chord length is equal to D/6, and not less than 300mm" to "the chord length is equal to D;/6, and not less than 150mm";
Increase the roundness requirements of vacuum vessels;
... - Change the requirements for the welding environment to "Welding of containers should be carried out indoors"; - Increase the design temperature to be less than 0℃, greater than -20℃, requirements for welding test plates of 20R and 16MnR containers; add the requirement that "cold-formed oval and dish-shaped heads should be heat treated"; will require 100% radiography or ultrasonic testing Separate containers from parts requiring 100% radiographic or ultrasonic inspection. Appendix A, Appendix B, and Appendix F of this standard are normative appendices, and Appendix C, Appendix D, and Appendix E are informative appendices. This standard was jointly proposed by the National Boiler and Pressure Vessel Standardization Technical Committee and the National Refrigeration Equipment Standardization Technical Committee. This standard is under the jurisdiction of the National Boiler and Pressure Vessel Standardization Technical Committee. The main drafting units of this standard are: Hefei General Machinery Research Institute, Dalian Refrigerator Co., Ltd., Yantai Ice Wheel Co., Ltd., Wuhan New World Refrigeration Industry Co., Ltd., York (Wuxi) Air Conditioning and Refrigeration Equipment Co., Ltd., and Shanghai Air Conditioner Factory. The main drafters of this standard: Chen Heliang, Zhang Mingsheng, Zhang Yong, Zhu Guangmo, Yu Zhiqiang, Yu Jinlong, Shen Shunan, Mao Fuxiang, Pan Li, Li Jingchen.
This standard is interpreted by the National Boiler and Pressure Vessel Standardization Technical Committee. 4
Scope
Pressure vessels for refrigeration devices
JB/T 4750-—2003
1.1 This standard specifies that liquefied gas is used as the refrigerant and the design pressure is not high Design, manufacturing, inspection and acceptance requirements for pressure vessels for refrigeration devices (hereinafter referred to as "vessels") with a design temperature of no higher than 4.0MPa and a design temperature of no higher than 200°C. 1.2 The working cycle of the refrigeration device should be a vapor compression refrigeration cycle and similar cycles (including heat pumps). 1.3 This standard does not apply to containers with an inner diameter (rectangular cross-section refers to the diagonal) less than 150mm or a volume less than 0.025m3, shellless jacketed heat exchangers, cooling pipes and direct-fired absorption refrigeration devices. device. 2 Normative reference documents
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest edition applies to this standard. GB150-1998 Steel pressure vessels
GB/T246-1997 Metal pipe flattening test method GB536-1988 Liquid anhydrous ammonia
GB/T699--1999 High-quality carbon structural steel (including modification sheet ) GB/T700-1988 Carbon Structural Steel (including Modification No. 1) GB/T912-1989 Carbon Structural Steel and Low Alloy Structural Steel Hot-rolled Thin Steel Plate and Steel Strip GB/T 985-1988
3 Basic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding GB/T986-1988 Basic forms and dimensions of submerged arc welding grooves GB/T 1226--2001
1- General pressure gauge
GB/T1348--1988 Ductile iron castings
GB/T1527--1997 Copper and copper alloy drawn tubes GB/T1804-2000 General tolerances for linear and angular dimensions without tolerances noted Tolerance GB/T 3077—1999
Alloy structural steel (including modification order No. 1)
GB/T 3098. 1—2000
Fasteners Mechanical properties Bolts, screws and Studs GB/T3098.2--2000 Mechanical properties of fasteners Nuts coarse thread GB/T 3274—1988
Carbon structural steel and low alloy structural steel hot-rolled thick steel plates and steel strips GB/T 5117 —1995
Carbon steel welding rods
GB/T5118--1995 Low alloy steel welding rods
GB/T5293--1999 Carbon steel welding wire and flux for submerged arc welding GB6479--2000 High voltage Seamless steel pipes for fertilizer equipment 5
JB/T 4750-2003
GB 6654--1996
5 Steel plates for pressure vessels (including modification orders No. 1 and 2) GBT. 6893--2000 Aluminum and aluminum alloy drawn (rolled) seamless pipes GB/T7778-2001 Refrigerant numbering method and safety classification GB/T8163-1999 Seamless steel pipes for transporting fluids GB/T8890--1998 Copper for heat exchangers Alloy seamless pipe GB/T9439--1988 gray iron castings
GB/T9440--1988 malleable iron castings
8 seamless steel pipes for petroleum cracking
GB 9948--1988||tt ||GB/T14957--1994 Steel wire for fusion welding
JB/T4700~4707--2000 Pressure vessel flange JB4708--2000 Steel pressure vessel welding process qualification JB/T4709--2000 Steel pressure vessel Welding regulations JB/T4712—1992
, saddle bearings
vessel legs
JB/T 4713—1992
JB/T4724—1992 support bearings JB/T4725—1992 Ear type bearing
JB4726-2000 Carbon steel and low alloy steel forgings for pressure vessels JB4730—1994 Non-destructive testing of pressure vessels JB4744-2000 Mechanical property testing of welded test plates for steel pressure vessel products JB/T4746--2002 Heads for steel pressure vessels JB/T 6918—1993
Metal and glass sintered liquid level gauges and sight glasses for refrigeration JB/T7226—1994 Heat exchange tubes for Freon condensation pressure vessels safety Technical Supervision Regulations (1999 Edition) promulgated by the former State Administration of Quality and Technical Supervision 3 General Provisions
3.1 Basic Provisions
In addition to complying with the provisions of this standard, the design, manufacture, inspection and acceptance of containers should also Comply with relevant laws, regulations and procedures promulgated by the state.
3.2 Qualifications and Responsibilities
3.2.1 The design and manufacturing units of containers should have a sound quality assurance system. The design unit should hold a pressure vessel design unit approval letter, and the manufacturing unit should hold a pressure vessel manufacturing license. 3.2.2 The design and manufacture of containers should be subject to supervision by the safety supervision agency of the administrative department. Responsibilities of the design unit:
3.2.31
The design unit shall be responsible for the accuracy and completeness of the design documents. a)
b) The design documents of the container should at least include design calculations and design drawings. c)
The overall design drawing of the vessel should be stamped with the seal of qualification for pressure vessel design. 3.2.4 Responsibilities of the manufacturing unit:
6
6893--2000 Aluminum and aluminum alloy drawn (rolled) seamless pipes GB/T7778-2001 Refrigerant numbering method and safety classification GB/T8163-1999 Seamless steel pipes for transporting fluids GB/T8890--1998 Copper for heat exchangers Alloy seamless pipe GB/T9439--1988 gray iron castings
GB/T9440--1988 malleable iron castings
8 seamless steel pipes for petroleum cracking
GB 9948--1988||tt ||GB/T14957--1994 Steel wire for fusion welding
JB/T4700~4707--2000 Pressure vessel flange JB4708--2000 Steel pressure vessel welding process qualification JB/T4709--2000 Steel pressure vessel Welding regulations JB/T4712—1992
, saddle bearings
vessel legs
JB/T 4713—1992
JB/T4724—1992 support bearings JB/T4725—1992 Ear type bearing
JB4726-2000 Carbon steel and low alloy steel forgings for pressure vessels JB4730—1994 Non-destructive testing of pressure vessels JB4744-2000 Mechanical property testing of welded test plates for steel pressure vessel products JB/T4746--2002 Heads for steel pressure vessels JB/T 6918—1993
Metal and glass sintered liquid level gauges and sight glasses for refrigeration JB/T7226—1994 Heat exchange tubes for Freon condensation pressure vessels safety Technical Supervision Regulations (1999 Edition) promulgated by the former State Administration of Quality and Technical Supervision 3 General Provisions
3.1 Basic Provisions
In addition to complying with the provisions of this standard, the design, manufacture, inspection and acceptance of containers should also Comply with relevant laws, regulations and procedures promulgated by the state.
3.2 Qualifications and Responsibilities
3.2.1 The design and manufacturing units of containers should have a sound quality assurance system. The design unit shall hold a pressure vessel design unit approval letter, and the manufacturing unit shall hold a pressure vessel manufacturing license. 3.2.2 The design and manufacture of containers should be subject to supervision by the safety supervision agency of the administrative department. Responsibilities of the design unit:
3.2.31
The design unit shall be responsible for the accuracy and completeness of the design documents. a)
b) The design documents of the container should at least include design calculations and design drawings. c) Www.bzxZ.net
The overall design drawing of the vessel should be stamped with the seal of qualification for pressure vessel design. 3.2.4 Responsibilities of the manufacturing unit:
6
6893--2000 Aluminum and aluminum alloy drawn (rolled) seamless pipes GB/T7778-2001 Refrigerant numbering method and safety classification GB/T8163-1999 Seamless steel pipes for transporting fluids GB/T8890--1998 Copper for heat exchangers Alloy seamless pipe GB/T9439--1988 gray iron castings
GB/T9440--1988 malleable iron castings
8 seamless steel pipes for petroleum cracking
GB 9948--1988||tt ||GB/T14957--1994 Steel wire for fusion welding
JB/T4700~4707--2000 Pressure vessel flange JB4708--2000 Steel pressure vessel welding process qualification JB/T4709--2000 Steel pressure vessel Welding regulations JB/T4712—1992
, saddle bearings
vessel legs
JB/T 4713—1992
JB/T4724—1992 support bearings JB/T4725—1992 Ear type bearing
JB4726-2000 Carbon steel and low alloy steel forgings for pressure vessels JB4730—1994 Non-destructive testing of pressure vessels JB4744-2000 Mechanical property testing of welded test plates for steel pressure vessel products JB/T4746--2002 Heads for steel pressure vessels JB/T 6918—1993
Metal and glass sintered liquid level gauges and sight glasses for refrigeration JB/T7226—1994 Heat exchange tubes for Freon condensation pressure vessels safety Technical Supervision Regulations (1999 Edition) promulgated by the former State Administration of Quality and Technical Supervision 3 General Provisions
3.1 Basic Provisions
In addition to complying with the provisions of this standard, the design, manufacture, inspection and acceptance of containers should also Comply with relevant laws, regulations and procedures promulgated by the state.
3.2 Qualifications and Responsibilities
3.2.1 The design and manufacturing units of containers should have a sound quality assurance system. The design unit shall hold a pressure vessel design unit approval letter, and the manufacturing unit shall hold a pressure vessel manufacturing license. 3.2.2 The design and manufacture of containers should be subject to supervision by the safety supervision agency of the administrative department. Responsibilities of the design unit:
3.2.31
The design unit shall be responsible for the accuracy and completeness of the design documents. a)
b) The design documents of the container should at least include design calculations and design drawings. c)
The overall design drawing of the vessel should be stamped with the seal of qualification for pressure vessel design. 3.2.4 Responsibilities of the manufacturing unit:
6
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