Brass pipe production sequence and welding

Brass pipe gas maintenance melting and insulation → horizontal continuous casting copper pipe blank → milling surface defects → three-roller planetary rolling → on-line coiling into rolls → three series joint stretching → disc stretching → straightening, flaw detection, setting Ruler→Gloss Annealing→Joint Finishing→Quality Inspection→Laminating, Brass pipe Packaging→Products

Second, the upper lead smelting → the upper lead continuous casting pipe blank → brass pipe rolling mill rolling → in-line annealing coil → three series stretching → disc stretching straightening, flaw detection, fixed length → strong convection bright annealing → joint finishing →Quality inspection→Laminating, brass pipe packaging→Products

Third, smelting → (semi-continuous) horizontal continuous casting slab → kneading machine kneading brass pipe blank → brass pipe rolling mill → in-line annealing coil → three series stretching → disc stretching straightening, flaw detection , fixed length → strong convection bright annealing → brass pipe joint finishing → quality inspection → laminating, packaging → products

The main work flow of brass pipe welding is as follows: groove grinding a pair of one fixed one welding joint self-inspection one supervision inspection one welding point spot welding one brass pipe welding joint full welding one appearance inspection a non-destructive test. The brass pipe is known from the welding process. The process control before the brass pipe welding and the brass pipe welding process is the key to controlling the welding deformation, and the deformation correction effect after welding is very limited.

Strictly control the deviation of the thickness of the brass pipe, adopt the method of manual polishing with the angle grinder for the nozzle below DN150mm, and adopt the method of machining the groove on the pipeline of DN150mm～DN300mm; make special fixture and pipe clamp, DN150mm The following pipe installation pipe card counterparts (

For the brass pipes with DN 150mm or more and DN300mm or less, special counter clamps are used, and the brass pipes will fix or connect the horse stools on the pipeline. When positioning with the clamp pair, the clamp should not be welded to the pipe. If the brass pipe weld is to be heat treated, the removal of the clamp shall be carried out before the heat treatment test. After the heat treatment, no accessories shall be welded to the base metal. When removing temporary solid objects, the base metal should not be damaged, the brass pipe and its residue should be cleaned.