Welded steel pipes refer to steel pipes with seams on the surface that are welded by steel strips or steel plates that are bent and deformed into round or square shapes. The blanks used for welded steel pipes are steel plates or strip steels.

The bolt flange connection consists of a pair of flanges, several bolts, nuts and a gasket. The flange is tightly pressed against the gasket by tightening bolts to achieve sealing. However, the performance of flange sealing …

Flanges are called flange joints together with flange gaskets and fasteners. Flange joints are widely used parts in engineering. Flange parts can be used in many large-scale construction and mechanical devices, and flange …

A flange is a protruded ridge, lip or rim, either external or internal, that serves to increase strength (as the flange of an iron beam such as an I-beam or a T-beam); for easy attachment/transfer of contact force with another object …

In industrial production, one type of product has to be used, and the use of this type of product has two characteristics, one is to use in pairs rather than to use alone…