Also called
spiral pipe or spiral steel pipe, it is a kind of low carbon steel pipe or low alloy structural steel strip with a certain spiral angle (called forming angle), and the pipe is made of welded joint. A narrow band with a large diameter pipe.
Special welded pipe
Spiral steel pipe
1, low pressure fluid pipe welding steel pipe is generally known, commonly known as clarinet. The welded steel pipe is used for conveying ordinary low pressure steam heating liquid such as water, gas, air, petroleum, etc. The steel tube wall thickness is divided into ordinary steel and thick steel plate; the side entry form is not related to the steel tube and the steel pipe. The nominal diameter (mm) pipe specification indicates that the nominal diameter is the approximate diameter. It's traditionally used in inches. In addition to directly conveying fluid, low pressure fluid welded steel pipe also uses low-pressure fluid to galvanized the original steel pipe.
2, low pressure fluid galvanized welded pipe is also known as galvanized welded steel tube, commonly known as white tube. Hot dip galvanized welded steel pipes are used to convey water, gas, air, oil and steam heating, warm water and other general low-pressure fluids or other uses. The wall thickness of the tube becomes a common galvanized steel sheet
And thick galvanized steel; the pipe ends are made of non thread galvanized steel pipe and thread galvanized steel pipe. The nominal diameter of the pipe specification indicates that the nominal diameter is the approximate diameter. Traditionally, it is expressed in inches, such as 11/2 and so on.
3, ordinary carbon steel bushing is an industrial and civil building, installation of mechanical equipment for the protection of electrical installation works of the top steel wire.
4, the straight welded pipe and steel pipe are parallel to the longitudinal welded pipe. They are usually divided into welded pipe, welded pipe, transformer cooling pipe and so on.
5, the hot - rolled steel tube is used as the tube material with the hot - rolled steel strip, which usually adopts the warm spiral shape, and the double side submerged arc welding method is used to carry out the pressure fluid conveying of the spiral seam steel. The steel pipe has strong bearing capacity and good welding performance. It is safe and reliable through various rigorous scientific tests and trial tests. The pipe diameter is large and the transmission efficiency is high, and the laying of pipeline investment can be saved. It is mainly used in oil pipeline, natural gas.
6, the pressure transmission fluid of high frequency spiral welded steel pipe is a hot rolled steel strip coil, which is often spiral heat insulation. High frequency welding method is used in lap welding, and high frequency spiral seam is used for pressure fluid transportation of welded steel pipe. The steel pipe has strong bearing capacity, good plasticity, easy welding and processing.
From all kinds of strict scientific detection and detection, it is safe and reliable, with small diameter, high transmission efficiency and saving investment in laying pipes. It is mainly used for laying oil, natural gas and other pipelines.
7, ordinary low pressure liquid transport spiral submerged arc welded steel pipe is a hot rolled steel tube, often a warm spiral, using double or single side automatic submerged arc welding method to carry water, gas, air and steam low pressure liquid to transport SAW pipe.
8, ordinary low pressure liquid transport spiral seam high frequency welded steel pipe is a hot rolled steel strip as a pipe material, often a warm spiral, high frequency welding method, suitable for ordinary low pressure liquid transport spiral seam high frequency welded pipe.
9, the spiral welded steel pipe pile is a hot rolled steel strip for pipe material, often using a warm spiral shape, using double side submerged arc welding or high frequency welding. It is used for civil engineering structure, wharf, bridge and other infrastructure piles.
The characteristics of
spiral steel pipe are: simple vertical production process, high efficiency, low cost and rapid development. Spiral welded longitudinal steel tubes are generally relatively high, which can reduce the production of large diameter steel billets, and can also produce steel pipes with different diameters by using the same width billets. But compared with the straight seam pipe of the same length, the weld length is 30 ~ 100%, and the productivity is low. Therefore, most small diameter pipes are welded by straight seam, and most of them adopt large diameter spiral welded pipe.
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