... marine use never leakage TP304, TP304L, TP316, TP316L, TP317L, TP321, TP310, TP347, TP347H Professional Manufacturer of Stainless Steel Pipe 01) Commodity ... ) Surface finish: Annealed/pickling 04) Material: TP304, TP304L, TP304/304L, TP310/S, TP316, TP316L, TP316/316L, TP317L, TP321, TP347/H S31803 ...