1)thick wall steel seamless pipes 2)grade:304,304L.316 ... TP316L,TP317L,TP310S,TP347H, 2205 Descriptionseamless stainless steel pipes,seamless steel pipes,cold-drawn or cold-rolled precision seamless ... TP316Ti,TP317,TP 317L, TP310S(2520), TP347,TP347H; Duplex steel 2205(S32205),S31803, 2207(S32750); 904L(N08904)etc. ... heating appliance, electronic instrument pipeline,etc. thick wall seamless steel pipe