ASTM A53 ERW Black Steel Pipe 1,standard:ASTM,DIN,BS,JIS 2,material:10#,20 ... ,size:1/2-24 Certification:ISO API ASTM A53 ERW Black Steel Pipe1,standard:ASTM,DIN,BS,JIS2,material:10#,20 ... 3,size:1/2-24Certification:ISO APIType:ASTM A53 ERW Black Steel PipeSize:1/2-24(21.34-609.6mm)WT: ... B,X42,X46,X52,X56,X60,X65,X70Ends:Beveled or square cut plastic caped.Application Range:Petroleum,chemical,power,gas, ...