Standard No.:	NB/T 47012-2020
English Name:	Pressure vessels for refrigerant device
Chinese Name:	制冷装置用压力容器
Professional Classification:	NB    Professional Standard - Energy
Issued by:	China Energy Administration
Issued on:	2020-10-23
Implemented on:	2021-2-1
Status:	valid
Superseding:	NB/T 47012-2010 Pressure vessels for refrigerant equipment
Language:	English
File Format:	PDF
Word Count:	22500 words
Price(USD):	675.0
Delivery:	via email in 1 business day

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