... , XXS 3. Welding Type: 1) Seamless Steel Pipe, 2) Seamed/Welded Steel Pipe: ERW Steel Pipe, Spiral Steel Pipe 4. Material: Carbon Steel: ASTM A106 Gr. B, ASTM A53, Gr ... , Mechanical Properties test, Eddy current, hydrostatic, Ultrasonic, Intergranular Corrosion. 9. Applications: Petroleum, chemicals, water conservancy, electric power, boiler, machinery, gas, construction ...