Pressure vessels for refrigerant device
1 Scope
1.1 This document specifies design, manufacture, inspection and acceptance requirements of pressure vessels for refrigerant devices, including shell-and-tube heat exchangers (HEs) for refrigerant devices, , with liquefied gas as the refrigerant, the design pressure not higher than 5.0 MPa and design temperature not higher than 200 °C (hereinafter referred to as "vessels").
1.2 The working cycle of refrigerant device shall adopt vapor compression refrigeration cycle and heat pump and similar cycles.
1.3 This document is not applicable to the following pressure vessels:
a) Vessels with the inside diameter (the maximum geometric size of inner section boundary for vessels with non-circular section) less than 150 mm or volume capacity less than 0.03 m3;
b) Shell-free tube-in-tube HE, refrigerant tubular HE, plate HE;
c) The generator of direct-fired absorption refrigerant device.
1.4 Vessels or pressure elements with the structural dimensions that cannot be determined in accordance with this standard are allowed to be designed by the following methods:
a) Stress analysis, calculation and assessment including finite element method, with the specific requirements complying with Annex E of GB/T 150.1-2011;
b) Comparative empirical design using comparable proven structures, with the specific requirements complying with Annex D of GB/T 150.1-2011;
c) Design by confirmatory test analysis method, with the specific requirements complying with Annex C of GB/T 150.1-2011 for design by confirmatory blasting test method, and complying with Annex A for external pressure design of integrally finned tubes made of copper and copper alloy and titanium alloy by confirmatory external pressure test.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150.1-2011 Pressure vessels--Part 1: General requirements
GB/T 150.2 Pressure vessels—Part 2: Materials
GB/T 150.3-2011 Pressure vessels—Part 3: Design
GB/T 150.4 Pressure vessels--Part 4: Fabrication, inspection and testing, and acceptance
GB/T 151 Heat exchangers
GB/T 536 Liquefied anhydrous ammonia
GB/T 1226-2017 General pressure gauge
GB/T 1348-2019 Spheroidal graphite iron castings
GB/T 1527 Drawn tube of copper and copper alloys
GB/T 3091 Welded steel pipes for low pressure liquid delivery
GB/T 3625 Titanium and titanium alloy tube for condensers and heat exchangers
GB/T 6893 Aluminum and aluminum alloys cold drawn(rolled) seamless tubes
GB/T 7778 Number designation and safety classification of refrigerants
GB/T 8163-2018 Seamless steel tubes for liquid service
GB/T 8890 Seamless copper alloy tube for condenser and heat-exchanger
GB/T 9439-2010 Grey iron castings
GB/T 9948 Seamless steel tubes for petroleum cracking
GB/T 17791 Seamless copper and copper alloys tube for air conditioner and refrigeration equipment
GB/T 20928 Seamless inner grooved copper tube
GB/T 25198 GB/T 25198Heads for pressure vessels
HG/T 20592 Steel pipe flanges (PN designated)
HG/T 20613 Bolting for use with steel pipe flanges (PN designated)
HG/T 20615 Steel pipe flanges (Class designated)
HG/T 20634 Bolting for use with steel pipe flanges (Class designated)
JB/T 4734 Aluminum welded vessels
JB/T 4745 Titanium welded vessels
JB/T 4755 Copper pressure vessels
JB/T 6918-2017 The sintered metal and glass visual lens and liquid meter for refrigeration
JB/T 10503 Specification for high performance tubes for air conditioning and refrigeration field service
NB/T 47013.8 Nondestructive testing of pressure equipments—Part 8: Leakage testing
NB/T 47014 Welding procedure qualification for pressure equipment
NB/T 47018
(All parts) Technical permission of welding materials for pressure equipment
NB/T 47020 Type and specification for pressure vessel flanges
NB/T 47021 A-type socket-weld flange
NB/T 47022 B-type socket-weld flange
NB/T 47023 Welding neck flange
NB/T 47024 Nonmetallic gaskets
NB/T 47025 Spiral wound gaskets
NB/T 47026 Double-jacketed gaskets
NB/T 47027 Stud blots & nuts for body flange
NB/T 47065.1-2018 Vessel support—Part 1: Saddle support
NB/T 47065.2-2018 Vessel support—Part 2: Leg support
NB/T 47065.3-2018 Vessel support—Part 3: Lug support
NB/T 47065.4-2018 Vessel support—Part 4: Bracket support
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 150.1 and GB/T 151 apply.
3.1
refrigerant
fluid used to transfer heat in a refrigeration system which absorbs heat in low temperature and low pressure environment and releases heat in high temperature and high pressure environment, usually accompanied by a phase change process
3.2
secondary refrigerant
fluid that transfers heat between the cooled medium and the evaporator of the refrigeration unit, which, for the purpose of this standard, refers to liquid, e.g. water and ethylene glycol, that does not change in phase during working process
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Materials
6 Design
7 Manufacturing, inspection and acceptance
Annex A (Normative) Design for external pressure of integrally finned heat exchange tubes made of copper and copper alloy and titanium alloy
Annex B (Normative) Safety accessories and instruments
Annex C (Normative) Requirements of pressure vessels for steel ammonia refrigerant devices for liquid ammonia and filling procedures
NB/T 47012-2020, NB 47012-2020, NBT 47012-2020, NB/T47012-2020, NB/T 47012, NB/T47012, NB47012-2020, NB 47012, NB47012, NBT47012-2020, NBT 47012, NBT47012
Introduction of NB/T 47012-2020
Pressure vessels for refrigerant device
1 Scope
1.1 This document specifies design, manufacture, inspection and acceptance requirements of pressure vessels for refrigerant devices, including shell-and-tube heat exchangers (HEs) for refrigerant devices, , with liquefied gas as the refrigerant, the design pressure not higher than 5.0 MPa and design temperature not higher than 200 °C (hereinafter referred to as "vessels").
1.2 The working cycle of refrigerant device shall adopt vapor compression refrigeration cycle and heat pump and similar cycles.
1.3 This document is not applicable to the following pressure vessels:
a) Vessels with the inside diameter (the maximum geometric size of inner section boundary for vessels with non-circular section) less than 150 mm or volume capacity less than 0.03 m3;
b) Shell-free tube-in-tube HE, refrigerant tubular HE, plate HE;
c) The generator of direct-fired absorption refrigerant device.
1.4 Vessels or pressure elements with the structural dimensions that cannot be determined in accordance with this standard are allowed to be designed by the following methods:
a) Stress analysis, calculation and assessment including finite element method, with the specific requirements complying with Annex E of GB/T 150.1-2011;
b) Comparative empirical design using comparable proven structures, with the specific requirements complying with Annex D of GB/T 150.1-2011;
c) Design by confirmatory test analysis method, with the specific requirements complying with Annex C of GB/T 150.1-2011 for design by confirmatory blasting test method, and complying with Annex A for external pressure design of integrally finned tubes made of copper and copper alloy and titanium alloy by confirmatory external pressure test.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150.1-2011 Pressure vessels--Part 1: General requirements
GB/T 150.2 Pressure vessels—Part 2: Materials
GB/T 150.3-2011 Pressure vessels—Part 3: Design
GB/T 150.4 Pressure vessels--Part 4: Fabrication, inspection and testing, and acceptance
GB/T 151 Heat exchangers
GB/T 536 Liquefied anhydrous ammonia
GB/T 1226-2017 General pressure gauge
GB/T 1348-2019 Spheroidal graphite iron castings
GB/T 1527 Drawn tube of copper and copper alloys
GB/T 3091 Welded steel pipes for low pressure liquid delivery
GB/T 3625 Titanium and titanium alloy tube for condensers and heat exchangers
GB/T 6893 Aluminum and aluminum alloys cold drawn(rolled) seamless tubes
GB/T 7778 Number designation and safety classification of refrigerants
GB/T 8163-2018 Seamless steel tubes for liquid service
GB/T 8890 Seamless copper alloy tube for condenser and heat-exchanger
GB/T 9439-2010 Grey iron castings
GB/T 9948 Seamless steel tubes for petroleum cracking
GB/T 17791 Seamless copper and copper alloys tube for air conditioner and refrigeration equipment
GB/T 20928 Seamless inner grooved copper tube
GB/T 25198 GB/T 25198Heads for pressure vessels
HG/T 20592 Steel pipe flanges (PN designated)
HG/T 20613 Bolting for use with steel pipe flanges (PN designated)
HG/T 20615 Steel pipe flanges (Class designated)
HG/T 20634 Bolting for use with steel pipe flanges (Class designated)
JB/T 4734 Aluminum welded vessels
JB/T 4745 Titanium welded vessels
JB/T 4755 Copper pressure vessels
JB/T 6918-2017 The sintered metal and glass visual lens and liquid meter for refrigeration
JB/T 10503 Specification for high performance tubes for air conditioning and refrigeration field service
NB/T 47013.8 Nondestructive testing of pressure equipments—Part 8: Leakage testing
NB/T 47014 Welding procedure qualification for pressure equipment
NB/T 47018
(All parts) Technical permission of welding materials for pressure equipment
NB/T 47020 Type and specification for pressure vessel flanges
NB/T 47021 A-type socket-weld flange
NB/T 47022 B-type socket-weld flange
NB/T 47023 Welding neck flange
NB/T 47024 Nonmetallic gaskets
NB/T 47025 Spiral wound gaskets
NB/T 47026 Double-jacketed gaskets
NB/T 47027 Stud blots & nuts for body flange
NB/T 47065.1-2018 Vessel support—Part 1: Saddle support
NB/T 47065.2-2018 Vessel support—Part 2: Leg support
NB/T 47065.3-2018 Vessel support—Part 3: Lug support
NB/T 47065.4-2018 Vessel support—Part 4: Bracket support
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 150.1 and GB/T 151 apply.
3.1
refrigerant
fluid used to transfer heat in a refrigeration system which absorbs heat in low temperature and low pressure environment and releases heat in high temperature and high pressure environment, usually accompanied by a phase change process
3.2
secondary refrigerant
fluid that transfers heat between the cooled medium and the evaporator of the refrigeration unit, which, for the purpose of this standard, refers to liquid, e.g. water and ethylene glycol, that does not change in phase during working process
Contents of NB/T 47012-2020
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Materials
6 Design
7 Manufacturing, inspection and acceptance
Annex A (Normative) Design for external pressure of integrally finned heat exchange tubes made of copper and copper alloy and titanium alloy
Annex B (Normative) Safety accessories and instruments
Annex C (Normative) Requirements of pressure vessels for steel ammonia refrigerant devices for liquid ammonia and filling procedures
