There are two primary methods for drying solvent on steel pipes both domestically and internationally: the rolling pipe method and the chain conveyor method. Consequently, the drying operating methods also differ slightly, as detailed below:
(1) Rolling Pipe Method
Firstly, arrange the solvent-coated steel pipes neatly on the feed rack in front of the drying oven. Depending on the speed of the pipe coating machine, in conjunction with the oven's temperature and time, divide them into batches of three, five, or more, and place them onto the support bars inside the drying oven. The steel pipes then slowly roll down the inclined support bars towards the middle of the oven, meeting the previously loaded batch of pipes already undergoing drying inside. The two batches must not overlap (or they may first rest on the rotating retaining hooks). Once the solvent on the pipes at the oven's discharge outlet has reached the required level, rotate the retaining hooks to roll them to the feed chain hooks of the pipe coating machine for galvanizing one by one.
During operation, ensure that the varying-length steel pipe group is aligned at one end before entering the drying oven, and this aligned end should be the one that will be submerged in the zinc bath first.
(2) Chain Conveyor Method
Similarly, arrange the solvent-coated steel pipes neatly on the feed rack in front of the drying oven. Then, manually or using a mechanism, place them onto the chain for conveyance into the drying oven for drying. During operation, attention should also be paid to aligning the heads of the varying-length steel pipe group.
