This standard specifies the dimensions, technical requirements, test methods, inspection rules and markings of basket filters for pipelines with liquid media. This standard is applicable to basket filters for pipelines with nominal diameters of DN15 to 300 mm, nominal pressures of pN0.25 to 6.3 MPa, and liquid medium temperatures of -20 to 350°C. JB/T 7538-1994 Basket filters for pipelines JB/T7538-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7538-94
Pipeline Basket Filter
1994-10-25 Issued
Ministry of Machinery Industry of the People's Republic of China
1995-10-01 Implementation
Mechanical Industry Standard of the People's Republic of China
Pipeline Basket Filter
1 Subject Content and Scope of Application
JB/T 7538-94
This standard specifies the dimensions, technical requirements, test methods, inspection rules and markings of pipeline basket filters (hereinafter referred to as filters) with liquid media.
This standard applies to pipeline basket filters with nominal diameter D% 15~300mm, nominal pressure P% 0.25~6.3MPa, and liquid medium temperature of -20~350℃.
2 reference standards
GB1220
GB/T1804
GB2100
GB3280
GB4216.10
GB5330
GB8163| |tt||GB 9113.1~9113. 7
GB 9115. 1~9115.13
GB9125
GB9439
GB10612
GB11352
JB/T74
ZBY002
ZBY303
3 Marking and size
3.1 Marking
3.1.1 Marking method
Approved by the Ministry of Machinery Industry on October 25, 1994
High-quality carbon cable structural steel Technical conditions
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Raised face welding steel pipe flanges
Basic environmental conditions and test methods for transportation and storage of instruments and meters Horizontal propeller cold water meters with nominal diameter 50~400mm Implementation on 1995-10-01||tt| |3.1.2 Marking example
JB/T7538-94
Standard number
Nominal pressure, MPa
Nominal diameter, mm
Type code: LG
Basket filter with nominal diameter of 15mm and nominal pressure of 4.0MPa: LG-15/4.0JB/T7538-94
3.2 Dimensions
3.2.1 The dimensions of the filter shall be as specified in Figure 1 and Table 1. Figure 1
Nominal diameter
Nominal pressure
Flange connection
Interface size
According to GB9113.1
~9113.7
According to GB4216.2
~4216.6
According to GB9115.1
~9115.13 or
JB/T79.1 and
JB/T82.1
Flange spacing
Basic hole size
Wire diameter
Nominal diameter
Nominal pressure
0. 25~6. 3
IB/T7538-94
Continued Table 1
Flange connection
Interface size
According to GB4216.2
~4216.6
According to GB9115.1
~9115.13 or
JB/T79.1 and
JB/T82.1
Flange spacing
Note: ①If there are special requirements, other specifications of screens can also be selected from GB5330, ②It is best not to use the size specifications in brackets. 3.2.2 The effective filtration area of ​​the filter is 2 to 6 times the inlet cross-sectional area. 3.3 Filter size tolerance
Basic mesh size
3.3.1 The size tolerance of the filter interface flange shall comply with the provisions of GB4216.10, GB9125 and JB/T74. 3.3.2 The limit deviation of the filter installation dimension L shall comply with the provisions of Class C (rough grade) in GB/T1804. 4 Technical requirements
4.1 Materials
Wire diameter
4.1.1 The recommended materials for the filter housing are shown in Table 2. Their chemical composition and mechanical properties shall comply with the provisions of the corresponding standards. Table 2
Shell material
HT200.HT250
ZG230-450,ZG1Cr18Nig
OCr19Ni9
GB9439
Corresponding standards
GB2100,GB 11352
GB 699,GB 710,GB 8163
GB1220
4.1.2 The filter screen is made of stainless steel wire mesh, and the filter cartridge is made of stainless steel cold-rolled steel plate. Its chemical composition and mechanical properties shall comply with the provisions of GB1220, GB3280 and other corresponding standards. 4.2 Parts such as filter cartridge, filter screen and flange
4.2.1 The size and technical requirements of the filter cartridge shall comply with the provisions of GB10612. 4.2.2 The specifications and technical requirements of the filter screen shall comply with the provisions of GB5330. 4.2.3 The technical requirements of the interface flange and the purple fasteners shall comply with the provisions of the relevant standards and shall have a factory inspection certificate. 4.3 Castings and welded parts
4.3.1 Castings
The scale, sand adhesion, flow inclusions, etc. on the inner and outer surfaces of the castings shall be cleaned. There shall be no defects such as cracks, cold shuts, sand holes, slag silicon, shrinkage holes, etc. on the castings that affect the strength and service life. 4.3.2 Welded parts
There shall be no cracks, pores, arc pits and slag inclusions on the surface of the weld and heat-affected zone. 4.4 Water pressure strength
Under the test conditions of Article 5.1, the shell shall be intact and leak-free. 4.5 Sealing silicon energy
Under the test conditions of Article 5.2, all connection parts and welds shall be leak-free. 3
4.6 Pressure loss
JB/T 753894
At the maximum flow rate (referring to the maximum working flow rate in the pipeline connected to the filter), when the medium is water, the pressure loss of the filter shall not exceed 0.04MPa.
4.7 Appearance quality
The outer surface of the filter should be smooth, the anti-rust coating should be uniform and firm, without obvious bubbles, brake drop and mechanical damage. There should be no scratches and bruises on the flange sealing surface.
4.8 Anti-transport vibration performance
After the filter is subjected to continuous impact test, the flange sealing surface and connection parts should be intact. 5 Test
5.1 Water pressure strength test
The filter should be installed on the water pressure test device for testing. The test pressure is 1.5 times the nominal pressure, and the shortest time to maintain the test pressure is 3min.
5.2 Water pressure sealing performance test
The filter should be installed on the water pressure test device for testing. The test pressure is 1.25 times the nominal pressure. The shortest time to maintain the test pressure is 2 minutes.
5.3 Pressure loss test
According to the requirements of Article 4.6, the pressure loss of the filter shall be measured. The test method shall comply with the provisions of Appendix B of ZBY303. 5.4 Appearance quality inspection
Use visual inspection to inspect the outer surface and flange sealing surface of the filter according to the requirements of Article 4.7. 5.5 Continuous impact test
The continuous impact test method shall comply with the provisions of Appendix A of ZBY002. 6 Inspection rules
Inspection is divided into factory inspection and type inspection.
6.1 Factory inspection
Products must be inspected and qualified by the quality inspection department before leaving the factory, and can only leave the factory with a product quality certificate. The factory inspection shall be carried out in accordance with the items specified in Articles 3.3.2, 4.3, 4.5 and 4.7 of this standard. 6.2 Type inspection
Type inspection shall be carried out in accordance with the contents specified in Chapter 4 of this standard (except Articles 4.1 and 4.2). 6.3 Type inspection is conducted in one of the following situations: a.
When the product is finalized:
When there are major changes in product structure and materials: b.
When the product is regularly assessed (once every year). 6.4 The inspection plan shall be negotiated by the supply and demand parties.
7 Marking, packaging and storage
7.1 Marking
7.1.1 There should be a striking arrow on the filter housing to indicate the direction of liquid flow. 7.1.2 The following contents should be marked on the filter label: a.
Type code:bzxz.net
Nominal diameter:
Nominal pressure:
Housing material brand:
JB/T7538--94
Production date and factory number (or production batch number); manufacturer name (or trademark).
7.2 Packaging
7.2.1 The filter surface (including the sealing surface) should be cleaned of dirt and then coated with rust inhibitor to prevent corrosion during transportation and storage. 7.2.2 The connecting end faces should be protected and packaged to ensure that the product is not damaged and easy to use under normal transportation conditions. The packaging form and method shall be determined by the manufacturer.
7.3 Storage
The filter should be stored in a place with a temperature of -25~55C, a relative humidity not exceeding 75%, good ventilation, and no corrosive gas. Additional remarks:
This standard was proposed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard is under the jurisdiction of the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry, Hefei Automation Instrument Factory, Harbin Longjiang Instrument Factory, Shanghai Automation Instrument Factory No. 9 and Chongqing Instrument Factory.
The main drafters of this standard are Chen Lin, Dai Wenxin, Zhao Enzhou, Zheng Qi, Li Huang, and Jiang Jianbin.
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