... )DIN 17740 DIN 17224 DIN 17458, 3)JIS G 3463 JIS G 3448 3. Specifications Cold drawn pipes: OD 6 ... , cold-drawn machinery production lines, cold-drawn production pipelines, Mechanics test, Ultrasonic test, Eddy current test, Hydro test, spectrum instrumnent and other ... steel pipes and stainless steel plate with well-equipped testing equipment and strong technical force, has experience in producing over ...