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iso qualified pre steel pipe a53 petroleum pipeline

API 5L X70 Pipe Suppliers , page3.ASTM A53/A53M Structural Steel Pipe ,

China Welded Steel Pipe Galvanized Steel Pipe Steel Pipe iso qualified pre steel pipe a53 petroleum pipeline

1.Black square&rectanhgular steel pipe ERW steel tube 2.Pre-galvanized square&rectangular steel pipe Pre-galvanized square/rectangular tube is made of hot dipped galvanized steel strip directly. 3.Hot dipped galvanizedsquare&rectangular steel pipe Hot dipped galvanized square/rectangular tube owns thicker zinc coating than pre-galvanized square/rectangular tube.

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