Answer: Usually, both ends are covered with plastic protective caps (dustproof and anti-collision), the outer surface is coated…
Answer: Pickled surface: Treated by pickling, the surface is silver-white or grayish-white with a slight roughness, mainly used…
Answer: In the ASTM standard, “TP” stands for “Tube/Pipe”. TP304 refers to 304 material stainless steel pipes that…
Answer: Widely used in petroleum, chemical industry, boiler heat exchangers, power stations, pharmaceuticals, food machinery, water treatment projects…
Answer: Check the surface: High-quality pipes have smooth surfaces, uniform color, no obvious oxide scale or black spots….
Answer: Usually including: Dimensional inspection: Outer diameter, wall thickness, length. Surface inspection: Checking for cracks, folds, scars…
Answer: Solution treatment (usually rapid cooling at around 1050°C) can dissolve carbides, restore the corrosion resistance of stainless…
Answer: Hot-rolled pipes: Processed at high temperatures, usually with large diameters, relatively rough surfaces and large wall…
Answer: The main production process is: Round steel piercing (forming hollow billet) → Multi-pass cold drawing or cold…
Answer: Common international and national standards include: China: GB/T 14976 (for fluid transportation), GB/T 14975 (for structural use),…
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