In the working process of the straight seam electric welded steel pipe, the production process is simple, the production efficiency is high, the cost is low, and the development is fast. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. A narrower blank can be used to produce welded pipes with larger pipe diameters, and a billet with the same width can also be used to produce welded pipes with different pipe diameters. But compared with the straight seam pipe of the same length, the weld length is increased by 30-100%, and the production speed is lower. Therefore, most of the smaller diameter welded pipes use straight seam welding, and the large diameter welded pipes mostly use spiral welding.
Welded steel pipe for low pressure fluid transportation is also called general welded pipe, commonly known as clarinet. It is a welded steel pipe used for conveying water, gas, air, oil and heating steam and other generally lower pressure fluids and other purposes. The wall thickness of the steel pipe is divided into ordinary steel pipe and thickened steel pipe; the connection end form is divided into non-threaded steel pipe (smooth pipe) and threaded steel pipe. Welded steel pipes for low-pressure fluid transportation are not only directly used to transport fluids, but also as raw pipes for galvanized welded steel pipes for low-pressure fluid transportation.
Galvanized welded steel pipe for low pressure fluid transportation is also called galvanized welded steel pipe, commonly known as white pipe. It is a hot-dip galvanized welded (furnace welded or electric welded) steel pipe used for conveying water, gas, air oil, heating steam, warm water and other generally lower pressure fluids or other purposes. The wall thickness of the steel pipe is divided into ordinary galvanized steel pipe and thick galvanized steel pipe; the connection end form is divided into non-threaded galvanized steel pipe and threaded galvanized steel pipe. The specification of the steel pipe is expressed by the nominal diameter (mm), which is the approximate value of the inner diameter.
Spiral seam submerged arc welded steel pipe for pressure-bearing fluid transportation of longitudinal electric welded steel pipe is a hot-rolled steel strip as a tube blank, which is spirally formed at regular temperature and welded by double-sided submerged arc welding. It is used for spiral seam for pressure-bearing fluid transportation. Steel Pipe. The steel pipe has strong pressure-bearing capacity and good welding performance. After various strict scientific inspections and tests, it is safe and reliable to use. The steel pipe has a large diameter, high transmission efficiency, and can save investment in laying pipelines. Mainly used in pipelines for transporting oil and natural gas.
