This standard replaces JB 464-86 and JB 4338-86. This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging and transportation of vertical condensers for ammonia refrigeration equipment. This standard applies to vertical condensers for ammonia refrigeration equipment. JB/T 7658.17-1995 Vertical condensers for ammonia refrigeration equipment JB/T7658.17-1995 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Vertical Condenser for Ammonia Refrigeration Device
Subject Content and Scope of Application
JB/T 7658. 17---95
JB 464-86
Replaces 4338-86
This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging and transportation of vertical condensers for ammonia refrigeration devices (hereinafter referred to as condensers). This standard applies to vertical condensers for ammonia refrigeration devices. 2 Reference standards
GB1226
General pressure gauge
GB12241 General requirements for safety valves
GB/T13306 Sign
JB/T6917 Pressure vessels for refrigeration equipment
JB/T6918 Metal and glass sintered liquid level gauges and sight glasses for refrigeration JB/T7658.18 Horizontal condensers for ammonia production equipment ZBJ73029 Cleanliness determination method for tubular heat exchangers for ammonia refrigeration equipment ZBJ73042 Pressure and pressure difference controllers for refrigeration 3 Terminology
3.1 Vertical condenser
The heat exchange tube bundle and shell are placed vertically, and the cooling water flows down along the inner wall of the tube in a film-like shape and is connected to the atmosphere, so as to condense the high-pressure ammonia gas compressed by the ammonia refrigeration compressor into a liquid heat exchanger. 4 Product classification
4.1 Type
The structure of the condenser is vertical shell and tube type;
b. The cooling method of the condenser is water cooling. 4.2 Model
4.2.1 Model indication method
The model of the condenser consists of uppercase Chinese phonetic letters and Arabic numerals (hereinafter referred to as numbers). The indication method of its model is as follows: LN
-Revision number: Indicated by numbers, the first design product is omitted. Nominal condensing area: Based on the surface area of ​​the condenser tube, indicated by numbers, m-code for condenser
Approved by the Ministry of Machinery Industry of the People's Republic of China on June 16, 1995 and implemented on July 1, 1996
4.2.2 Model example
JB/T7658.17-95
LN75-1: Indicates a condenser with a nominal condensing area of ​​75m2, the first modification. 4.3 Basic parameters
4.3.1 The nominal condensing area of ​​the condenser shall comply with the provisions of Table 1. Table 1
4.3.2 Thermal parameters
4.3.2.1 The heat transfer coefficient of the outer surface of the condenser K=870W/(m2·C). The working conditions when measuring the heat transfer coefficient of the condenser shall comply with the provisions of Table 2. 4.3.2.2
Condensation temperature tk
Inlet water temperature w1
Cooling water volume V
Fouling coefficient?
4.4 Design conditions
Design pressure: 2MPa;
Design temperature: 75℃.
5 Technical requirements
General requirements
Water side (steel pipe)
m\/(s·kw)
The condenser shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. It can also be manufactured according to the agreement between the user and the manufacturer.
5.2 Materials
5.2.1 The materials of the main pressure-bearing components of the condenser shall have material certificates. 5.2.2 The materials used for the condenser shall comply with the provisions of JB/T6917. 5.3 Cold and hot processing
The cold and hot processing of the condenser shall comply with the provisions of JB/T6917. 5.4 Welding and non-destructive testing
The welding and non-destructive testing of the condenser shall comply with the provisions of JB/T6917. 5.5 Test plate and test specimen
The test plate and test specimen of the condenser shall comply with the provisions of JB/T6917. 5.6 Parts and components
The shell, flange, support, tube sheet, support plate, tube and tube bundle of the condenser shall comply with the provisions of JB/T6917. 5.7 Safety accessories
In addition to complying with the provisions of JB/T6917, the safety accessories of the condenser shall also comply with the following provisions: a.
The overpressure relief device shall comply with the provisions of GB12241 and relevant standards; JB/T 7658.17---95
The high-pressure cut-off device shall comply with the provisions of ZBJ73042; b.
The liquid level gauge and sight glass shall comply with the provisions of JB/T6918; c.
d. The pressure gauge shall comply with the provisions of GB1226. 5.8 Pressure resistance and airtightness requirements
The condenser shall be subjected to pressure resistance test and airtightness test, and the requirements shall be in accordance with the provisions of JB/T6917. 5.9 Cleanliness
The interior of the condenser shall be clean, and the impurity content in the part in contact with the refrigerant shall not exceed 800mg/m2. 5.10 Appearance quality
The condenser shall be beautiful and elegant, and the weld surface shall be free of cracks, pores, arc pits and slag inclusions. The outer surface shall be painted, and the paint shall be evenly smooth and of uniform color, and there shall be no defects that affect the appearance. 5.11 Completeness
The condenser supplied in a complete set shall also include:
Ammonia inlet and outlet joints;
Safety valve joints,
Air vent and mixed gas vent joints;
Pressure gauge joints;
Oil drain joints;
Balance pipe joints,
Assembly flanges and supports in a set.
5.12 Accessories
The accessories of the condenser are:
Safety valve;
Pressure gauge and pressure gauge valve:
Ammonia valve;
Oil drain valve;
Water separator;
Anchor bolts,www.bzxz.net
5.12.2 The accessories of the condenser shall comply with the provisions of the relevant standards. 5.13 Warranty period
If the user complies with the provisions of the product manual, within 18 months from the date of shipment from the manufacturer, if the condenser is damaged or cannot work normally due to poor manufacturing, the manufacturer shall replace or repair it free of charge. 6 Test method
6.1 Performance test
The performance test method of the condenser can refer to the provisions of Appendix A (reference part) of JB/T7658.18, or industrial operation test can be adopted. 6.2 Nondestructive testing
The method of nondestructive testing of condensers shall comply with the provisions of JB/T6917. 6.3 Pressure test and airtightness test
The pressure test and airtightness test methods of condensers shall comply with the provisions of JB/T6917. 6.4 Cleanliness determination
The cleanliness determination of condensers may refer to the provisions of ZBJ73029. 1451
Inspection rules
General requirements
JB/T 7658. 17-95
The condenser shall be inspected by the technical inspection department of the manufacturer in accordance with this standard and technical documents, and may only leave the factory after passing the inspection. 7.2 Inspection items
7.2.1 Inspection classification
The inspection of condensers is divided into factory inspection and type inspection. 7.2.2 Inspection items
The inspection items of condensers shall comply with the provisions of Table 3. Table 3
Inspection items
Performance test
Cleanliness
Material report of main pressure-bearing parts
Processing quality
Appearance quality
Non-destructive testing report
Pressure resistance and airtightness test
Check the contents of the label
Check the completeness of the product according to the factory documents
7.3 Factory inspection
Each condenser shall be inspected after manufacture. 7.4 Type inspection
Factory inspection
Type inspection
7.4.1 Type inspection shall be carried out for new products of at least one specification of condenser or old products that have undergone major reforms. 7.4.2 The performance test method of the condenser may be in accordance with the provisions of Appendix A of JB/T7658.18, or industrial operation test may be adopted. 8 Marking, packaging and transportation
8.1 Marking
8.1.1 Label
A label should be fixed on the condenser at a conspicuous and flat position. The label should comply with the provisions of GB/T13306. The contents marked on the label can refer to the provisions of JB/T6917.
8.1.2 Factory documents
The factory documents of the condenser can refer to the provisions of JB/T6917. 8.2 Packaging and transportation
8.2.1 All the pipes of the condenser should be coated with anti-rust agent and properly sealed. The assembled flange should be tightened with bolts. The flange sealing surface should be coated with anti-rust grease and sealed with a plate.
8.2.2 The painting, packaging and transportation of the condenser can refer to the provisions of JB/T6917. 1452
Additional instructions:
JB/T7658.17—95
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Wuhan New World Refrigeration Industry Co., Ltd. and Dalian Refrigeration Co., Ltd. The main drafters of this standard are: Hu Zengwu, Sun Zhengguo, Ha Hongbo, Li Muzhen. This standard was first issued in January 1964 and revised for the first time in December 1986. 1453
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