TECHNOLOGY AND MARKET SITUATION OF SPIRAL WELDED PIPE

As a member of the pipe fittings professional for spiral welded steel pipe should be about, like raw material parameters of some products and specification parameters should know something, such as a result of a good businessman should I to be clear at a glance, if this is impossible, and talk about what we carried out in the future? Imports of spiral welded pipe prices rose nearly 30% from the second quarter in the third quarter. Domestic many small and medium-sized spiral HanGuanChang already in production limit production, large-scale spiral HanGuanChang limit production will is not strong, many spiral HanGuanChang arrange maintenance ways the hope through this difficult period. In the third quarter is a traditional spiral welded tube industry downstream users production and marketing of season.

Spiral welded pipe production process short, high produce efficiency, low cost, carry out faster. The strength of the spiral welded pipe ordinary higher than straight seam welded pipe, use a narrow billet yield larger diameter welded pipe can also use the same width of billet yield strange welded pipe diameter. But compared with the same length of straight seam pipe, weld length add 30 ~ 100%, and the yield rate is low. Therefore, the small diameter welded pipe are mostly select straight seam welding, large diameter welded pipe for the most part chooses spiral welding.

Spiral welded steel pipe refers to the steel belt or winding deformation shapes such as round, square steel after welding, the appearance of seamless steel pipe. According to the welding method of different can be divided into electric arc welding tube, high frequency or low frequency electric resistance welded pipe and gas welding tube, furnace welding pipe, bondi pipe, etc. According to the weld shape can be divided into straight seam welded pipe and spiral welded pipe. Welded steel tube used in oil drilling and machinery manufacturing, etc. Butt weld pipe can be used as water gas, etc., big going seam welded pipe used in high pressure oil and gas transport, etc.; Spiral welded pipe used in oil and gas transport, pipe pile, piers, etc. Than welded steel pipe seamless steel pipe of low cost, high production efficiency.