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Oiled Red Painted Seamless Heat Exchanger Tubes , ASTM A192 Pressure Boiler Pipe Carbon Steel Alloy Steel Heat Exchanger Boiler Tube Size: OD: 10-114mm WT: 1-20mm Length: fixed length 5.8M, 11.8m, single random length, double random length, cut length Our services : Provide products with high quality and reasonable price The first time back to you Perfect after-sale service Offer free samples Production Standard and Steel Grade: ASTM A179 (Grade A,C,D) ASTM A192 ASTM A210