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
READ MORE
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
READ MORE
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
READ MORE
Identifying fake and inferior hot-rolled large diameter seamless steel pipes is crucial to ensuring safety and reliability in construction and industrial applications. Here are several methods to detect counterfeit or substandard products:1. Visual InspectionSurface Quality: Check for surface defect
READ MORE
