The first three steps of the production process of thick-walled seamless steel pipe are basically the same. The difference begins with the fourth step. After the round billet is hollowed out, it is required to start and anneal. After annealing, it is acid washed with a special acidic liquid. After pickling, apply oil. This is followed by a multi-pass cold drawing (cold rolling) of the blank tube, followed by a special heat treatment. After heat treatment, it is straightened. After the steel pipe is straightened, it is sent to a metal flaw detector (or water pressure test) by a conveyor belt for internal flaw detection.
If there are cracks inside the steel pipe, bubbles and other problems will be detected. After thick wall seamless steel pipe seamless pipe quality inspection, it must be carefully selected by hand. After the quality inspection of the steel pipe, the paint is sprayed with the number, specification, production batch number, etc. It is hoisted into the warehouse by a crane. The spreader beam is composed of four hooks connected with the spreader beam. The design is compact and the structure is simple. The beam is a rectangular frame box beam structure, and the C-shaped steel plate hook is fixed at the periphery of the spreader beam.
The opening degree of the hook can be adjusted to effectively prevent the hook of the hook from being unhooked, and the hook of the hook can be automatically hooked by the operation of the lifting device, without manual hooking, reducing labor intensity, saving labor cost and improving work efficiency. The reasonable connection between the spreader beam and the two lifting points of the main hook of the crane and the soft connection between the chain assembly and the main hook can effectively prevent the crane hook and the main hook from being unhooked during the dumping, ensuring production safety.
Please refer to: https://www.permanentsteel.com