What is the classification of spiral pipe?

 1, welded steel pipe for low-pressure fluid transmission called general welded pipe, commonly known as black pipe. Is used to transport water, gas, air, oil and heating steam and other general lower pressure fluid and other uses of welded steel pipe. The wall thickness of steel pipe is divided into ordinary steel pipe and thickened steel pipe; the shape of the receiver is divided into unthreaded steel pipe and threaded steel pipe. Steel pipe specifications with nominal caliber (mm), nominal caliber is an approximation of the inner diameter. Customarily, commonly used in inches. Low-pressure fluid transportation with welded steel pipe in addition to direct use for the transport of fluids, but also a large number of low-pressure fluid transportation with galvanized welded steel pipe as the original tube. 

2, low pressure fluid transfer galvanized welded steel pipe is also known as galvanized electric welded steel pipe, commonly known as white pipe. Is used to transport water, gas, air, oil and heating steam, heating water and other general lower pressure fluid or other uses of hot dipped galvanized welded steel pipe. The wall thickness of steel pipe is divided into ordinary galvanized steel pipe and thickened spiral pipe; the form of pipe ends is divided into galvanized steel pipe without thread and galvanized steel pipe with thread. Steel pipe specifications are expressed in nominal caliber, nominal caliber is an approximation of the inside diameter. Customarily commonly used in inches, such as 11/2, etc. 

3, ordinary carbon steel wire casing is used to protect the top of the electrical installation works of industrial and civil buildings, installation of machinery and equipment, etc. Steel pipe. 

4, straight seam welded steel pipe is a steel pipe with welded seams parallel to the longitudinal direction of the pipe. Usually divided into metric electric welded steel pipe, electric welded thin-walled pipe, transformer cooling oil pipe and so on. 

5, spiral submerged arc welded steel pipe for the transmission of pressurized fluids is hot-rolled steel coil as a billet, often warm spiral forming, double-sided submerged arc welding method, spiral seam steel pipe for the transmission of pressurized fluids. The steel pipe has strong pressure-bearing capacity, good welding performance, and is safe and reliable through various strict scientific maintenance and testing. The spiral pipe has large caliber, high transmission efficiency, and can save the investment of laying pipeline. It is mainly used for the pipeline of oil and natural gas transmission. 

6, spiral high-frequency welded steel pipe for the transmission of pressurized fluids is a spiral high-frequency welded steel pipe for the transmission of pressurized fluids with hot-rolled steel coil as the billet, often warm spiral forming, welded by high-frequency lap welding method. Steel pipe has strong pressure-bearing capacity, good plasticity, easy to weld and process; through a variety of strict and scientific maintenance and testing, the use of safe and reliable, large diameter steel pipe, high transmission efficiency, and can save investment in laying pipelines. Mainly used for laying pipelines for the transmission of oil, natural gas, etc. 

7, general low-pressure fluid transmission with spiral submerged arc welding steel pipe is hot rolled steel coil for the billet, often warm spiral forming, using double-sided automatic submerged arc welding or single-sided welding method for water, gas, air and steam and other general low-pressure fluid transmission with submerged arc welding steel pipe. 

8, general low-pressure fluid transmission spiral high-frequency welded steel pipe is hot-rolled steel coil for the billet, often temperature spiral forming, using high-frequency lap welding method for general low-pressure fluid transmission spiral high-frequency welded steel pipe. 

9, pile spiral welded steel pipe is hot-rolled steel coil as a billet, often temperature spiral forming, using double-sided submerged arc welding or high-frequency welding made of civil construction structures, docks, bridges