News
-
Pre-welding of straight seam steel pipe
The joint seam (that is, the forming seam) has no wrong edges or the wrong edges are less than the specified value. Generally, the amount of wrong edges is less than 8% of the plate thickness, and the maximum is not more than 1.5mm. 2. To ensure that the weld has an appropriate penetrat...Read more -
Precautions for purchase of straight seam steel pipe
1. Purchasing needs to understand the types of steel pipes: A. Divided by type: straight seam steel pipe, seamless steel pipe, spiral steel pipe, etc. B. Classification of cross-section shapes of straight seam steel pipes: square pipe, rectangular pipe, elliptical pipe, flat ellipse pipe, semicir...Read more -
Submerged arc steel pipe forming method
Submerged arc steel pipe forming methods include continuous twist forming (HME), roll forming method (CFE), Uing Oing Expanding forming method (UOE), roll bending forming method (RBE), Jing Cing Oing Expanding forming method (JCOE), etc. However, three forming methods, UOE, RBE, and JCOE, are wid...Read more -
Analysis of the difference between seam stainless steel pipe and seamless stainless steel pipe
Stainless steel pipe is a long hollow round steel, which is widely used in petroleum, chemical, medical, food, light industry, machinery and instrumentation, and other industrial pipelines and mechanical structural parts. Besides, when the bending and torsion strength is the same, the weight is l...Read more -
Common problems, causes and solutions of high frequency welding
⑴ Weak welding, desoldering, cold folding; Reason: The output power and pressure are too small. Solution: 1 adjust the power; 2 adjust the extrusion force. ⑵ There are ripples on both sides of the weld; Reason: The opening angle is too large. Solution: 1 adjust the position of the guide roller; 2...Read more -
Process technology of thermally expanded seamless steel pipe
Diameter expansion is a pressure processing technology that uses hydraulic or mechanical means to apply force from the inner wall of the steel pipe to expand the steel pipe radially outward. The mechanical method is simpler and more efficient than the hydraulic method. Several of the world’...Read more
