Cold rolled tube welding

Cold rolled high precision welded pipe, wall thickness uniformity, high brightness tube appearance ( The surface of the steel plate level decision of steel tube surface brightness) , can be arbitrary length. In high precision, low pressure fluid applications reflects its economy and aesthetics. Purpose: with the rapid development of economic construction in China, growing consumption of cold rolling welded pipe, the demand of cold rolling welded tubes of same, widening market prospects look good. Cold rolling welded pipe seamless pipe market demand performance in terms of basic industries, such as petroleum, chemical, power generation, the demand of cold rolling welded pipe seamless tube, a third of the total consumption and such as automobile, shipbuilding, construction and environmental protection, etc. Also have large demand. Cold rolling welded pipe is mainly used in heat exchanger tube, fluid pipe, pressure pipe, the structure of the building materials used, urban landscape, and other industries, annual consumption at about 700000 t. Cold rolling welded pipe used in industry demand is higher, and mature production technology, at present our country with the amount of cold rolling welded pipe used in industry about 150000 t, part still need to import. Look from the domestic cold-rolled welding tube products, steel grade is given priority to with austenitic steel; Varieties of products are: seamless steel tube cold drawn tube, cold rolling tube, hot extrusion tube, centrifugal casting tube, spinning tube; Welded pipe include: plasma welding welding, argon arc welding, submerged arc welding, the speed of light and high frequency welded pipe, can production of cold rolling welded tubes basically covers all over the world standard specifications, of cold rolling welded pipe section tube business is more than one hundred kinds of specifications, variety, product use involving the industrial, civil many fields. Cold rolling welded pipe is the main difference between hot rolling and cold rolling: 1, cold rolled into sections to allow local buckling section, which can make full use of the bar buckling bearing capacity; Local buckling and hot rolled steel does not allow cross section. 2, the causes of hot rolled steel and cold rolled steel residual stress is different, so the distribution of cross section also have very big difference. Cold-formed thin-walled steel cross section on the residual stress distribution is curved, and hot rolled steel or welded steel residual stress distribution on cross section is a thin film. 3, hot rolled steel free torsional rigidity is higher than cold rolled steel, so the torsion properties of hot-rolled steel is better than cold rolled steel. Cold rolling welded pipe classification: annealing and tube, cold rolling mill running pipe, cold rolled and hot rolled tube, cold rolling tube rolling, cold rolling thick wall tube, cold rolling pipe, cold rolled steel, cold rolled welded pipe steel, cold rolling mill, cold rolling tube equipment