... of standerds 2.superior quality reasonable price Advantages:1.Specifications: seamless piece for DN20mm-DN800mm 2.There are welded pipe fittings ... the DN ≤ 2800mm S ≤ 120mm 3.Product material: Carbon steel, alloy steel, stainless. 4.Carbon steel: Q235B, 20 #, Q345B, ASTM A53, A105, WPB, ST37 ... 12Cr1MoV 15CrMo, 20G, A109, A515, A 516 L245, etc.6.Stainless Steel: SUS310S, 316,316 L, 302,321,304,304 L, 301 ...