... /2"-24" DN15-DN600, Welded up to 80" DN2500 2) Wall Thickness: Sch5S-Sch160, STD, XS, XXS 3. Welding Type: 1) Seamless ... . Test: Chemical composition analysis, Mechanical Properties test, Eddy current, hydrostatic, Ultrasonic, Intergranular Corrosion. 9. Applications: Petroleum, chemicals, water conservancy, electric power ...