1.In addition to 32 inches connecting pipe and 20 inches, 24 inches, 30 inches. 2.But according to need to customize. 1.In addition to 32 inch interface and 20 inches, 24 inches, 30 inches. 2.Use, used in oil or other fluid pipe connection material selection and mn2 has high strength, good toughness, easy to welding and other characteristics, widely used in petroleum pipeline connection. 3. ...