1. Scratches.Features:The surface of seamless steel pipes presents irregular scratches of varying lengths and directions, which are generally straight and can be seen at the bottom.Causes1) Improper operation during annealing.2) Scratches during lifting.3) During the straightening process, the seaml

First, pre-treat the base pipe of epoxy resin coated steel pipe inside and outside----grind the steel pipe (Advantages: Automatic spraying makes the coating of the inner and outer walls of the substrate uniform and has good leveling. Meet CJ/T120-2008 standard and GB/T5135.20---2010 standard---Put t

When the wall thickness of boiler steel pipes is different, compensation gaskets can be used to deal with it.1. The required thickness can be achieved by thickening or thinning the wall thickness of the steel pipe.2. In the case of inconsistent wall thickness of steel pipes, high-strength bolts and

Seamless steel pipe is a commonly used pipe material, widely used in oil, natural gas, chemical industry, electricity, heating, gas supply, machinery, construction, and other fields. Seamless steel pipes can be divided into various specifications according to wall thickness and diameter, and seamles