... pipe and welded pipe 1.Tube for Fluid Transportation Service Application:For Fluid Transportation serviceProduction Standard, Grade, ... Passivation, Phosphating, Shot Blasting. 4.Boiler Tube Application:For high, middle, low pressure boiler and pressure purposeProduction ... of Application:Products is designed and manufactured for boilers, supeiheaters and pressure systems of ships.Steel Grade:320, 360, ...