First, the structural characteristics of welded pipe joints
Welded pipe joints are suitable for oil-based piping systems. They are also used for water and pneumatic piping systems. The working pressure is less than or equal to 32Mpa.2.
Welded pipe joint structure: welded pipe joint consists of joint body, nut and joint. It is sealed with O-ring between the joint body and the joint. When the joint body is screwed into the body, metric fine thread and cone are used. And a combination of sealing gaskets. The pipe is welded to the pipe in the piping system.
Welded pipe joint features: welded pipe joints have the advantages of simple structure, easy manufacture, good sealing, etc., but the welding volume is large during installation and the welding quality is high.
Second, the performance specifications of welded pipe joints:
1. Applicable medium: non-corrosive or corrosive medium such as oil, water and gas;
2. Applicable temperature: t≤450°C by using medium and selecting gasket;
3. Manufacturing materials: 20#, 35#, 1Crl8Ni9Ti, 0Crl8Ni-12M02Ti, 316L;
4, piping requirements: ¢ 6 - ¢ 50 ordinary grade precision seamless steel pipe.
Third, the welding standard of pipe joint manufacturing
1. Metal pipe joint O-ring flat seal joint for fluid transmission and general purpose (JB/T 966-2005)
2. Cone seal welded straight pipe joint (JB/T 6381.1-2007)
3, cone seal welded straight through 55 ° unsealed pipe threaded pipe joint (JB/T 6381.2-2007)
4, cone seal welded straight through 55 ° sealed pipe threaded pipe joint (JB/T 6381.3-2007)
5, cone seal welded straight through 60 ° sealed pipe threaded pipe joint (JB/T 6381.4-2007)
6. Cone seal welded 90° elbow joint (JB/T 6382.1-2007)
7. Cone seal welded 55° unsealed pipe thread 90° elbow joint (JB/T 6382.2-2007)
8. Cone seal welded 55° sealed pipe thread 90° elbow joint (JB/T 6382.3-2007)
9. Cone seal welded 60° sealed pipe thread 90° elbow joint (JB/T 6382.4-2007)
10. Welded straight pipe joints at both ends of the cone seal (JB/T 6383.1-2007)
11. Cone seal welded right angle pipe joint (JB/T 6383.2-2007)
12, cone seal welded tee pipe joint (JB/T 6383.3-2007)
13. Cone seal welded partition right angle pipe joint (JB/T 6384.1-2007)
14. Cone seal welded type wall-through straight pipe joint (JB/T 6384.2-2007)
15. Cone seal welded pressure gauge pipe joint (JB/T 6385-2007)
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