The finished products of seamless steel pipes and precision steel pipes will have the problem of uneven eccentric thickness; but how is it produced? Many people don’t understand. Today, let’s talk about how the eccentricity of seamless steel pipes such as cold-drawn steel pipes, cold-rolled steel pi
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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
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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
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When assessing the quality of SSAW (Spiral Submerged Arc Welded) steel pipes from their appearance, several factors can be considered. Here’s a comprehensive guide to visually inspect SSAW steel pipes for quality:1. Surface FinishUniformity: Check for a consistent surface finish. The outer surface s
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