... ues the first grade material in China. 2,advanced testing equipment. 3,competitive price . Specifications1)Commodity:welded Stainless Steel Tube 2 ... Satin / Hairline 400G, 500G, 600G or 800G Mirror finishTesteddy current inspection, ultrasonic inspection, X-ray inspection, real-time imaging, hydrostatic test, spectral analysis, intergranular corrosion ...