This standard specifies the technical requirements, test methods, inspection rules, product packaging, storage, etc. of quick-change joints in pneumatic systems that can quickly connect or disconnect gas lines without tools or special devices. This standard applies to quick-change pneumatic pipe joints with compressed air as the working medium. This standard does not apply to other pipe joints and hydraulic pipe joints. JB/T 7058-1993 Technical conditions for quick-change pneumatic pipe joints JB/T7058-1993 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7058-1993
Technical Conditions for Quick-Change Pneumatic Pipe Fittings
Published on September 23, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on July 1, 1994
Mechanical Industry Standard of the People's Republic of China
Technical Conditions
Quick-Change Pneumatic Pipe Fittings
Subject Content and Scope of Application
JB/T7058-1993
This standard specifies the technical requirements, test methods, inspection rules, product packaging, storage, etc. of quick-change fittings in pneumatic systems that can quickly connect or disconnect the gas circuit without tools or special devices. This standard applies to quick-change pneumatic pipe fittings (hereinafter referred to as fittings) with compressed air as the working medium. This standard does not apply to other pipe fittings and hydraulic pipe fittings. ：Cited standards
GB2351
GB7932
GB7937
GB/T14513
JB/T7056
JB/JQ207017
3 Terms, symbols, codes
Hydraulic and pneumatic systems and components Hose nominal inner diameter series General technical conditions for pneumatic systems
Hydraulic and pneumatic pipe joints and accessories Nominal pressure series Determination of flow characteristics of pneumatic components
General technical conditions for pneumatic pipe joints
Technical conditions for packaging of pneumatic components
According to the provisions of Chapter 3 of JB/T7056.
4 Technical requirements
4.1 Working conditions
According to the provisions of Article 5.1 of JB/T7056.
4.2 Performance
Flow characteristics, leakage, and pressure resistance shall comply with the provisions of JB/T7056. 4.2.1
Structural rigidity and strength
The quick-change joint shall be able to withstand: radial load 2200N; axial load 2200N. 5 General manufacturing requirements
5.1 Parts processing, assembly, and appearance quality shall comply with the provisions of JB/T7056. 6 Test methods
6.1 Test conditions shall comply with the provisions of JB/T7056. 6.2 Test piece installation
6.2.1 For the structural rigidity and strength test, the test piece for the leakage test when connected is the joint assembly with a one-way valve connected to the pressure source, and the other end is closed. The test piece for the leakage test when disconnected is the plug or socket of the one-way valve connected to the pressure source. 6.2.2
Approved by the Ministry of Machinery Industry on September 23, 1993
Implemented on July 1, 1994
6.3 Test device
JB/T7058-1993
6.3.1 The test device is shown in Figures 1 to 4. The test device should be equipped with a pressure relief and explosion-proof system to ensure the safety of the test. Pressure calculator
Steam collection quantity standard
Test joint
Leakage test device when the joint is disconnected
Requirements for quick connection with the fixed end of the joint without ink
F(40N)
Pressure gauge
Financial bracket
Pressure source
Leakage test device when the joint is connected
Test joint
Radial strength test device
According to the total staff
One-way network center line
JB/T70581993
Auxiliary dynamometer
Sugar head
4 Axial strength test device
The system error of measuring instruments shall be in accordance with the provisions of Table 1. Table 1
Measurement level
Pressure%
6.4 Test items
Flow characteristics
Test method According to GB/T14513.
6.4.2 Leakage test
6.4.2.1 Leakage test when the joint is disconnected
Enclosed branch case
Pressure surface
The test is carried out on the device shown in Figure 1. The test piece is installed according to Article 6.2.2. A radial force of 40N is applied at the position shown in the figure. The gas pressure is the nominal pressure. The pressure is maintained for 5 minutes. No leakage shall occur. Pressure resistance test
According to JB/T7056.
6.4.4 Structural stiffness and strength test
6.4.4.1 Radial stiffness test
The test is carried out on the device shown in Figure 3. The test piece is installed according to Article 6.2.1. The gas pressure is nominal pressure, and a radial force of F=2200N is applied at the position shown in the figure. Keep for 1min, and no disconnection or damage shall occur. Perform leakage test in accordance with the provisions of Article 6.4.2.2 6.4.4.2 Axial strength test
The test is carried out on the device shown in Figure 4, and the test is installed in accordance with the provisions of Article 6.2.1. The gas pressure is nominal pressure, and an axial force of F=2200N is applied at the position shown in the figure, and keep for 1min, and no disconnection or damage shall occur. Perform leakage test and appearance quality inspection in accordance with the provisions of Article 6.4.2.2
According to the provisions of JB/T7056.
Inspection rules
According to the provisions of JB/T7056.
Packaging, transportation, storage
Marking,
According to the provisions of JB/T7056.
Additional Notes:
JB/T7058-1993
This standard was proposed and managed by Wuxi Pneumatic Technology Research Institute. This standard was drafted by Fuxin General Pneumatic Accessories Factory, Liaoning Province. The main drafters of this standard are Wang Jinchun and Li Yingwu. People's Republic of China
Mechanical Industry Standard
Technical Conditions for Quick-Change Pneumatic Pipe Fittings
JB/T70581993
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
1/16 Sheet 1/2
Format 880×1230
Word Count 6.000
First Edition in May 1994
First Printing in May 1994bzxZ.net
Print Quantity 1-500
Price 3.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_850
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