First, the production method of seamless steel pipe: Hot rolled seamless steel pipe Hot rolled seamless pipes are generally produced on automatic rolling mills. The solid tube blank is inspected and the surface defects are removed, cut into the required l
1. Spiral steel tube packaging should avoid loosening and damage in normal handling, transportation and storage. 2. If the demander has special requirements for the packing materials and methods of spiral steel pipes, they should be specified in the contr
When the technical condition of the automobile transmission shaft deteriorates, the amplitude of the bending vibration increases, the vibration is severe, and even the body is shaken, and an obvious periodic sound is emitted, which is called vibration and
The seamless steel pipe is formed by perforating a steel ingot or a solid tube blank, and then hot rolled, cold rolled or cold drawn. The specifications of the seamless pipe are expressed by the outer diameter X wall thickness and millimeter number. Sea
When purchasing hot-dip galvanized seamless tubes, some customers take zinc flower as a judgment mark, and must have zinc flower; while some customers demand "flower-free" galvanized tubes, why?