The curing temperature of epoxy coating is 180±10℃. it is necessary to input the Coated Steel Pipe from the chain to the curing furnace, and then process to further solidify and plasticizing.
Polyethylene Coated Steel Pipe with high temperature preheating, heat storage, curing furnace do not need heating, only certain heat preservation effect, can use the heat steel pipe itself for leveling and curing directly.
The curing time of the two coatings ranged from 5-10min. The epoxy resin coating can be cooled by air after it is released from the curing furnace. The temperature of polyethylene coating steel pipe out of the curing furnace is high, if the cooling speed in the air is slow, time is too long, the coating will turn brown and aging. So it need water spray cooling, water cooling can increase the crystallinity, thereby increasing the surface gloss of the coating. But the water temperature should be strictly controlled so as to avoid bubbles and local defects.