What is the welding process of stainless steel pipe?

Welded steel pipe referred to as welded pipe, commonly used steel or steel strip through the unit and mold bending molding and welding made of steel pipe. Welded steel pipe production skills are simple, high production efficiency, more varieties and standards, less equipment investment, but the general strength is lower than the seamless steel pipe. since the 1930s, followed by the rapid development of excellent strip steel rolling production and welding and inspection skills trekking, the quality of welds continue to improve the weld quality, welded steel pipe varieties and standards are increasing and in the increasing number of areas, especially in the heat exchanger pipe, decorative pipe, low pressure fluid pipe, etc. to replace the seamless steel pipe. Seamless steel pipe is replaced in the increasing fields, especially in the heat exchange equipment pipe, decorative pipe, medium and low pressure fluid pipe and so on.

First, the small diameter stainless steel welded pipe is continuous online production, the thicker the wall thickness, the larger the unit and the capital investment of the melting equipment, the less economic and practical it is. The thinner the wall thickness, its input-output ratio will drop accordingly; Secondly, the skills of the product to choose its advantages and disadvantages, the general welded steel pipe with high precision, wall thickness uniformity, high brightness of the inner appearance of the tube (the appearance of steel plate appearance grade selection of steel pipe appearance brightness), can be arbitrarily sized. Thus, it shows its economy and beauty in high precision, medium and low pressure fluid utilization.

Following the rapid development of China's economic construction, the consumption of stainless steel continues to increase, during which the need for stainless steel pipe as increasingly broadened, the market outlook is favorable. Stainless steel seamless pipe market demand is now the basic industry, such as petroleum, chemical, power generation, etc., its needs account for one-third of the total consumption of stainless steel seamless pipe, as well as automotive, shipbuilding, construction and environmental protection industry also has a greater need. Stainless steel welded pipe is mainly used for heat exchanger pipe, fluid pipe, pressure pipe, mechanical construction pipe, urban landscape, and other work, the annual consumption of about 700,000t.

Industrial stainless steel welded pipe needs to be relatively high, and production skills old, now China's annual industrial stainless steel welded pipe amount of about 150,000t or so, part of the still need to import. From the domestic stainless steel tube products, steel to austenitic steel-based; product varieties are: seamless steel pipe, including cold-drawn tube, cold-rolled tube, hot extruded tube, centrifugal casting tube, spinning tube; welded receipts, including: plasma welding, argon arc welding, submerged arc welding, light-speed welding and high-frequency welding and other welded tubes, stainless steel tubes can be produced basically cover the world's standard varieties of standard stainless steel tube standards, varieties of standards and varieties of stainless steel pipe also amount to More than one hundred kinds of products, product use touches many fields of industry and civil use. But all in all, the domestic stainless steel tube in terms of varieties, standards, quantity and so on.