Also known as spiral or helix spiral steel pipe, is a low-carbon steel or low-alloy structural steel strip at a certain helix angle (called molding angle) rolled into a tube, and the tube is made of welded joints It can be produced with a narrow strip of large diameter pipe.
Classes of spiral steel pipe
1, low pressure fluid pipe welded steel pipe is generally known, commonly known as the clarinet. Welded steel pipes for conveying water, gas, air, oil, and other general low pressure steam heating fluid and other purposes. Wall thickness of pipe into ordinary steel and thicker steel; take over the side into the form does not with steel pipes and tubes with steel. Pipe specifications with nominal diameter (mm), said nominal diameter is the diameter of the approximation. Traditionally used in inches. Low pressure fluid welded steel pipe for conveying fluids in addition to direct, but also a large number of low pressure fluid used galvanized welded the original steel pipe.
2, low pressure fluid galvanized welded steel pipes, also known as galvanized welded steel pipes, commonly known as white tube. Hot-dip galvanized welded steel pipe used for conveying water, gas, air, oil and steam heating, warm water, such as generally low pressure fluid or other purposes. Wall thickness of pipe into ordinary galvanized steel
and thick galvanized steel; pipe ends into the form of non-threaded galvanized steel pipe and threaded galvanized steel pipe. Pipe specifications with nominal diameter, said nominal diameter is the diameter of the approximation. Traditionally commonly expressed in inches, such as 11/2 and so on.
3, ordinary carbon steel wire casing is the industrial and civil construction, installation of machinery and equipment for the protection of electrical installation works top steel wire.
4, straight seam welded steel pipe and steel pipe is parallel to the longitudinal weld pipe. Usually divided into metric welded steel pipe, welded tube, transformer cooling pipes and so on.
5, 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. Mainly used for oil pipelines, natural gas.
6, the pressure transmission fluid with high-frequency spiral welded steel pipe is hot-rolled steel strip coils for the tube, often warm spiral shape, lap welding method using high-frequency welding, high frequency spiral seam for pressure fluid transfer welded steel pipe. Strong pressure steel, plastic, and easy welding and machining molding; through
from a variety of rigorous and scientific inspection and testing, safety and reliability, pipe diameter, high transmission efficiency, and save the laying of pipeline investments. Mainly used for laying to transport oil, natural gas and other pipelines.
7, the general low pressure liquid delivery spiral submerged arc welded pipe is hot-rolled steel strip coils for the tube, often warm spiral shape, using double-sided or single-sided automatic submerged arc welded into the legal system for water, gas, air and steam low pressure liquid delivery SAW pipe.
8, the general low pressure liquid delivery spiral seam high frequency welded steel pipe is hot-rolled steel strip coils for the tube, often warm spiral shape, using high frequency lap welding method for general low pressure liquid delivery spiral seam high frequency welded steel pipe.
9, spiral welded steel pipe pile is hot-rolled steel strip coils for the tube, often warm spiral shape, using double-sided submerged arc welding or high frequency welding made for civil engineering structures, piers, bridges and other infrastructure pile with steel pipe.
Characteristics of spiral steel pipe: Longitudinal production process is simple, high efficiency, low cost, rapid development. Spiral Welded Longitudinal generally higher than that, can narrow the billet production of large diameter pipe, you can also use the same width of the billet production of different pipe diameters. But compared with the same length of straight seam pipe, weld length of 30 to 100%, and lower production rate. Therefore, smaller diameter pipe is mostly a straight seam welded, large diameter spiral welded pipe is mostly used.