Difference between stainless steel seamless pipe and welded pipe
Stainless steel has good comprehensive performance and good appearance and surface characteristics, and is widely used in various industries. Similarly, stainless steel pipe is no exception. Stainless steel pipe is a kind of steel with a hollow section, generally divided into stainless steel seamless pipe and welded pipe. Their processing methods and performance also have certain differences, the differences are as follows:
1. The difference in production process
Stainless steel welded pipes are made of steel plates or steel strips that are crimped and formed by a unit and a die. Generally, there is a weld on the inner wall of the pipe; while Stainless Steel Seamless Pipes are perforated using round tube blanks as raw materials, and are cold rolled, cold drawn or It is made by the production process of hot extrusion, and there is no welding point on the tube.
2. The difference in the appearance of the steel pipe
Stainless steel welded pipes have very small wall thickness tolerances, and the wall thickness of the entire circumference is very uniform; the steel pipe has high precision, the inner and outer surfaces of the pipe have high brightness, and the length can be arbitrarily determined; thin-walled pipes can be made. However, seamless pipes have low precision, uneven wall thickness, low brightness on the inner and outer surfaces of the pipe, high sizing costs, and pitting and black spots on the inner and outer surfaces that are not easy to remove. Therefore, the seamless pipes usually produced have thicker walls.
3. The difference in Properties and Price
Seamless pipes are much higher than welded pipes in corrosion resistance and pressure bursted. With the improvement of welded pipe manufacturing process, mechanical properties and mechanical properties are gradually approaching seamless pipes. The production process of seamless pipe is more complicated, and its price is more expensive than welded pipe.
Related References:
1. Welding Process and Letter Designations
2. Welding Stainless Steel to other Steel
3. Welding and Post Fabrication Cleaning for Construction and Architectural Application
4. Welded Stainless Steel Pipe
5. Post weld cleaning and finishing of stainless steel
6. Avoid PWHT Post Weld Heat Treatment
7. Fume Associated With Welding Stainless Steel
8. Avoiding Distortion During Welding Stainless Steel
9. Design Strength of Welded Connections
10. Processes for Welding Stainless Steel
11. Brazing Stainless Steel
12. Soldering Stainless Steel
13. Welding Stainless Steel
14. Selection of Welding Consumables Filler
15. Selection of Welding Consumable for Welding Stainless Steel
16. Filler Metals For Welding Stainless Steel
17. Schaeffler and Delong Diagrams for Predicting Ferrite Levels
18. Welding Properties of Stainless Steel
19. 308L 309L 316L 347 Filler Metal Introduction
