... :Non-secondarySection Shape:SquareAPI SPEC 5CT \5DUsage:Oil pipeline, pipe materials collar, Oil natural gas , industrial gas, water, oil transportationH40\J55\K55\N80\L80\P110\Q125 ... \A210\A179DIN17175JIS G3455ASTM A213JIS G3456Oil pipeline, pipe materials collar, Oil natural gas , industrial gas, water, oil transportationOil Chemical power the boiler industry high temperature, low ...