... C, Gr.D, DC01, DC03, 1008, 1010 Process: Seamless: Hot Rolled, Hot Explored Welded: ERW, HFW Coating: Hot-dipped Galvanised, Electrical ... Material: Seamless: Pipe Billet( Hot Rolled, or Con-casting), Mother Pipe Welded: Hot Rolled Steel Coil (HRC) , Cold Rolled Steel Coil (CRC), Pre-pained Galvanized ...