... , 320 Grit; Polish: 400 Grit and 600 Grit. (5) Specification. Round Pipe: OD range from 6mm~460mm. WT range from 0 ... steel strips, or bulk. Ends protection: Plastic capsApplication:Alloy steel pipe applies to petroleum, chemical industry, electric power, boiler, high ... resistant, corrosion resistant part. The size of Alloy steel pipe can be made according to the customers requirements. Contacts: ...