Stainless Steel Pipe Tube Process flow
Cold drawn and hot-rolled two kinds of steel pipe process, stainless steel pipe manufacturers for your simple overview:
(Cold-rolled) → billet → heat treatment → straightening → → → → → → → → → → → → → → → → → Water pressure test (inspection) → mark → storage.
Hot-rolled (extruded seamless steel pipe): round tube → heating → perforation → three roll skew rolling, continuous rolling or extrusion → off pipe → sizing (or reducing diameter) → cooling → billet → straightening → water pressure Test (or flaw detection) → mark → storage.
Two steel pipe process details
Cold drawn steel pipe with hot rolled coil as raw material, pickling to remove the scale after the cold rolling, the finished product for the hard rolling, due to continuous cold deformation caused by cold hardening hard rolling strength, hardness, toughness Plastic indicators decline, so stamping performance will deteriorate, can only be used for simple deformation of the parts. Rolling hard rolls can be used as raw materials for hot-dip galvanizing plants, since hot-dip galvanizing units are equipped with annealing lines. Rolling hard roll weight is generally 6 to 13.5 tons, coil diameter of 610mm.
General cold rolling plate, roll should be continuous annealing (CAPL unit) or hood furnace annealing to eliminate cold hardening and rolling stress, to achieve the corresponding standard mechanical properties of the specified.
Cold rolled steel plate surface quality, appearance, dimensional accuracy are better than hot-rolled plate, and its product thickness of the right thin to about 0.18mm, so favored by the majority of users. To cold-rolled coil for the substrate for deep processing of products, a high value-added products. Such as electro-galvanized, hot-dip galvanized, fingerprint-resistant galvanized, color coated steel coil and vibration composite steel plate, PVC laminates steel plate, so that these products are beautiful, high corrosion resistance and other excellent quality, has been widely used. The cold rolled steel sheet must be finely finished after annealing, including cutting head, tail, trimming, leveling, leveling, rewinding, or slitting. Cold rolled products are widely used in automobile manufacturing, home appliances, instrument switches, construction, office furniture and other industries. The weight of each pack after the steel sheet is 3 to 5 tons. Flat re-volume weight is generally 3 to 10 tons / volume. Coil diameter 610mm.
Currently on the market for stainless steel tube into a curved way there are two.
First, the cold bending method: the general use of bending machine several times rolling shape.
Disadvantages are: 1, steel pipe diameter is limited, generally only in the 1CM-5CM between.
2, such as the curvature is too small, prone to deformation of steel pipe diameter.