Precision welded pipe is on the basis of general welded steel pipe further processing results, which is the fine products in the welded pipe products. Compared with ordinary pipe, it is characterized by: the precision of the geometry size, uniform wall thickness, steel pipe geometry, small ovality, weld quality is reliable, and within the burr is small, the surface is bright and clean； After weld heat treatment or overall protective atmosphere heat treatment, surface can be achieved without Oxidation, the effect of mechanical properties of stable and uniform microstructure, its production cost is much lower than similar seamless precision steel tube, can be directly or after a small amount of processing for certain equipment, reduce equipment manufacture cost. Precision welded pipe is mainly used in chemical industry in our country at present, control, machinery, instrumentation, aerospace, automotive lamp fields, such as automobile, motorcycle shock absorben gear reducer, condenser; water pipelines, transmission shaft, muffler; manipulation of the shaft, reasoning system, hydraulic cylinder, cylinder, jack, all kinds of conveyor roller, belt roller, printing roller textile dyeing and printing roller, textile machine with a draft tube, hydraulic support tube, deep well pump tube, all kinds of mechanical light tube outer tube and pipe line of household appliances, electric heater, the variety specification is various, basic meet industry needs.
Precision welded pipe production:
The first mode of production: the tube (sheet, strip) direct molding welded pipe, strip its main processes are forming, welding, sizing. Features: less production process, engineering process is simpl e, short production cycle, product accuracy is slightly lower.
The second mode of production: the tube (sheet, strip) first formed directly welded into a certain size pipe, and then through the cold-drawn or cold-rolled into finished pipe, welded steel pipe known as DOM. The main processes are forming, welding, sizing, rolled or cold drawn (with a mandrel or without mandrel), or continuous cold drawn (ie welding- drawn joint production line). Features: decentralized production processes, process and production cycle is long, large area, product size, good accuracy, smooth inner and outer surfaces, mechanical properties and microstructure state is good.
The third mode of production: the tube (sheet, strip) first formed directly welded into a certain size pipe, into a continuous cold reducing mill reducing into finished tubes. The main processes are forming, welding, continuous cold-reduced diameter. Features: Compact production processes, process simplicity, unit production efficiency, fast conversion specifications for the production of small diameter and thin-walled welded steel pipe.
Post time: Feb-26-2021