1 Scope
1.1 This standard specifies the technical requirements, such as design, material, fabrication, inspection, acceptance, marking and packaging, of the brazed plate heat exchangers.
1.2 This standard is applicable to brazed plate heat exchangers with a working temperature of -196℃~225℃ and a working pressure of -0.1 MPa~14 MPa.
1.3 For brazed plate heat exchangers beyond the scope of this standard, it shall be determined by the evaluation of technical evaluation institutions.
2 Normative references
The following referenced documents are indispensable for the application 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 1220 Stainless steel bars
GB/T 3280 Cold rolled stainless steel plate, sheet and strip
GB/T 4237 Hot rolled stainless steel plate, sheet and strip
GB/T 5187 Foil of copper and copper alloy
GB 13296 Seamless stainless steel tubes for boiler and heat exchanger
GB 24511 Stainless steel plate, sheet and strip for pressure equipment
NB/T 47013.5 Nondestructive testing of pressure equipments - Part 5: Penetrant testing
NB/T 47004 Plate heat exchangers
NB/T 47008 Carbon and alloy steel forgings for pressure equipment
NB/T 47010 Stainless and heat-resisting steel forgings for pressure equipment
NB/T 47014 Welding procedure qualification for pressure equipment
NB/T 47018 Technical permission of welding materials for pressure equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in NB/T 47004 and the following apply.
3.1
pressure
force acting on unit area vertically, which refers to gauge pressure hereof, unless otherwise specified
3.2
working pressure
maximum pressure possibly existing on any side of brazed plate heat exchanger under normal operating condition
3.3
design pressure
maximum pressure set on any side of brazed plate heat exchanger, which is used as design load conditions together with the corresponding design temperature and shall not be less than the working pressure
3.4
design temperature
element temperature of brazed plate heat exchanger set under normal working pressure and corresponding design pressure
In any case, the temperature of element surface shall not exceed the allowable service temperature of element material. For the brazed plate heat exchangers working at a temperature above 0℃, the design temperature shall not be lower than the possible maximum temperature of element surface under working condition; for those working at a temperature below 0℃, the design temperature shall not be higher than the possible minimum temperature of element surface.
3.5
bursting pressure
maximum pressure of brazed plate heat exchanger during burst test
3.6
plate
corrugated metal plate formed by precise pressing
3.7
endplate
plate at the end face side of brazed plate heat exchanger which plays a reinforcing role
3.8
plate pack
set of all the plates contained between the endplates
3.9
brazed plate heat exchanger
integrated heat exchanger formed by welding plates, endplates, nozzles or flanges at high temperature, as shown in Figure 1
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Materials
6 Design
7 Fabrication
8 Inspection and acceptance
9 Marking and packaging
10 Installation and use
Annex A (Informative) Instruction for brazing procedure and brazing procedure qualification report
Annex B (Informative) Fatigue test report
