There many advantages of using spiral steel pipes. Spiral welded steel pipe has high strength and durability when compared with longitudinal welded pipe. According to the test of relevant research institutes in the United States, although the spiral welded pipe and the straight welded pipe(ERW pipe) belong to the same steel grade, the spiral welded steel pipe has higher toughness. Also, the spiral tubes match to high fatigue strength as same as seamless steel pipe’s and electric resistance welded pipes (ERW pipe). The accuracy of the size is an important feature in spiral steel pipes. Generally, the diameter tolerance is less than 0.12%, the deflection is less than 1/2000, and the ellipse is less than 1%. Spiral steel pipes have the capability to withstand a high pressure compared to other steel pipes exist in the market. Under the same pressure condition, the stress of spiral weld is lower than that of the straight weld, which is 75%to 90% of that of straight weld pipe. Spiral pipes are used for many different purposes. They are used as arc welded pipe, high frequency or low frequency electric resistance welded pipe, gas welded pipe, furnace welded pipe or bondi pipe under many circumstances.
The welded steel pipe is used in oil drilling and mechanical manufacturing; the furnace welded pipes can be used as water-supply or gas-supply pipes; large diameter straight seam welded pipes for high pressure oil and gas transmission; the spiral welded pipes exactly are for oil and gas transmission (Treatment Plant Piping, Pump Station Piping), pipe piles, piers, pipeline aerial crossing, aqueducts and so on. Welded steel pipes for conveying water, gas, air, oil, and other general low pressure steam heating fluid and other purposes. Generally low pressure fluid welded steel pipe is used for transfer general low pressure steam heating fluids. Pressurized liquid delivery spiral submerged arc welded pipe is hot-rolled steel strip coils for the tube, often warm spiral shape, with double-sided submerged arc welding method for spiral seam steel pressure fluid transfer. Strong pressure steel, welding performance is good, through a variety of rigorous scientific inspection and testing trial, the use of safe and reliable. Pipe diameter, high transmission efficiency, and can save the laying of pipeline investments.
PA Steel Steel Enterprise Co., Ltd. as a leading China steel products manufacturer specialized in production of high quality steel series products and located in Tianjin；provide Galvanized Steel Pipe、Stainless Steel Pipe、Seamless steel pipe、Square bar steel、 Steel Wire.