ASTM A53/A53M Standards Specification for Pipe, NPS 1/4 INCH – 30 INCH ,Schedules 10 -160, STD, XH and XXH Welded and Seamless , Black and Hot-Dipped, Zinc-Coated ASTM A53 VS A153 steel ASTM A53 pipe covers Welded and also smooth, Black and also Hot-Dipped Galvanized nominal (average) wall surface pipeline … Continue reading ASTM A53/A53M Standards Specification for Pipe, NPS 1/4 INCH – 30 INCH ,Schedules 10 -160, STD, XH and XXH Welded and Seamless