What are the technical characteristics of butt welding elbows? Feature 1: Butt-welded elbows have weld seams. After the welding operation is completed, butt-welded elbows need to be anti-rust or anti-corrosion treatment according to the actual situation or the external environment of the pipel

There are mainly the following six methods of pipe bending in the pipe bending factory　　 Stamping method: Use a tapered core on the punch to expand the pipe end to the required size and shape.　　Rolling wheel method: Put a core in the tube, and push the outer circumference with a roller for round edg

Why elbows are commonly used At the current stage of the production and processing of elbows, when the heating of the elbow seamless steel pipe is stopped, the defects formed by the cracks of the elbow will exceed a certain degree of deformation temperature, and when a certain degree of deformation