... :2-50mm 3.OD:20-377mm 4.5000Tons in stock 5.best price,qualified pipes &timely delivery RANGE15 NB UP TO ... Steel ASTM / ASME A 335 GRP 1 , P 5 , P 9 , P 11 , P 12 , P 22 , P 23 , P 91ASTM / ASME A 691 GR 1 CR , 1 ... 1/4 CR , 2 1/4 CR , 5 CR ...