Carbon steel Seamless Pipe from 1/2"~24", SCH20~SCH160, DRL, SRL, or fixed length ASTM A106/A53/API 5L GR.B/X42/X52 PSL-1/PSL- Carbon steel Seamless Pipefrom 1/2"~24", SCH20~SCH160, DRL, SRL, or fixed lengthASTM A106/A53/API 5L GR.B/X42/X52 PSL-1/PSL- 2