's requirement.
9. Surface: bare or black painted to prevent rust, 3PE/FBE and etc.
According to Coating and Lining Standard:
a. AWWA C210: Liquid-Epoxy Coating Systems for The Interior and Exterior of Steel Water Pipelines
b. AWWA C203: Coal-Tar Protective Coatings and Linings For Steel Water Pipelines-Enamel And Tape-hot Applied
c. AWWA C222: Polyurethane Coating for the Interior and Exterior of Steel Water Pipe and Fittings.
10. Usage: used for conveyance water, petroleum and conveya