Generally, it is attached to the water supply and drainage fittings. When the manufacturer is out of the factory, each side of the expansion joint has a flange. It is directly connected with the bolt of the pipe and equipment in the project.
1 Effect
The purpose of loosening the flange by using the welding ring is to save materials. The structure is divided into two parts. One part of the pipe is connected to the pipe and the other is welded. The flange plate uses low grade material, and the tube part uses the same material as the pipe to save the material.
Welding ring loose sleeve flange:
1, save the cost. When the material of the pipe is special and the price is expensive, the cost of welding the same material flange is high.
2. It is not convenient for welding or not easy to process or need high strength. Such as plastic pipes, glass tubes, and so on.
3. It is convenient for construction. If the connection is not easy to find the corresponding flange bolt hole flange bolt holes are the replacement of equipment or prevent the day after.
2 shortcomings
1, the pressure is low. 　　
2, the strength of the welding ring is low (especially when the thickness is below 3mm)
3 standard
National standard: GB/T9112-2000 (GB9115.1-2000 to GB9115.4-2000)
American Standard: ANSI B16.5 Class150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW)
Daily standard: JIS 5K, 10K, 16K, 20K (PL, SO, BL, WN, TH, SW)