Hot-rolled steel pipe siam dan .
Embryonic tube buatsaih → Mandrel thlan → Embryonic tube chhung lam a lubricating paint hman dan → Diameter tihzauh leh tihzauh → Heat treatment → physical leh chemical testing → straightening → trimming the ends → End processing → Grinding leh storage .
Cold-rolled steel pipe siam dan .
Loading → Peeling → Grinding → Enfiahna → Heating → Piercing → Trimming → Pickling leh Neutralization → Grinding → Welding → Lubrication → Cold Drawing → Cold Rolling → A siam zawh tawh → Straight Testing → Trimming → leh storage .
Welded steel pipe siam dan .
Coiling → Slitting → Forming → Continuous Automatic Welding → A Hman Dan Tur → Degreasing → Solution Enkawlna → Straightening → Pickling → Flattening → Damage Testing.