1Standard:ASTMA106 GRB /API 5L GRB/ASTMA53GRB 2Material A106/A53 GRB API 5L GRB 20# CHINESE 3OD:1/4"-24",13mm-610mm 4WT: SCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXS 5Usage: Boiler Use,water Transport,Building,Machinery,Traffic,Aviation,Oil ...Read More