About Welded pipe

1: Welded pipe for low pressure fluid transportation (GB / t3092-1993), also known as common welded pipe, commonly known as black pipe. It is a welded steel pipe used for conveying water, gas, gas, oil and heated steam as well as other fluids with low pressure. According to the wall thickness, steel pipes are divided into ordinary steel pipes and thickened steel pipes. According to the form of pipe end, it can be divided into unthreaded steel pipe (light steel pipe) and threaded steel pipe. The specification of steel pipe is expressed by nominal diameter (mm), which is the approximate value of inner diameter. Traditionally, it is expressed in inches, such as 11 / 2, etc. The welded steel pipe used in low-pressure fluid transportation is not only used to transport fluid directly, but also used as the original pipe of galvanized welded steel pipe used in low-pressure fluid transportation.






2. Galvanized welded steel pipe (GB / t3091-1993) is used for low-pressure fluid transportation, also known as galvanized welded steel pipe, commonly known as white pipe. It is a hot-dip galvanized welded (butt welding or electric welding) steel pipe used to transport water, gas, air oil and heating steam, hot water and other general fluids under low pressure. The steel pipes are divided into ordinary galvanized steel pipes and thick galvanized steel pipes according to the wall thickness. According to the pipe end form, it can be divided into galvanized steel pipe and galvanized steel pipe. Traditionally, it is expressed in inches, such as 11 / 2, etc.








3. Ordinary carbon steel wire conduit (gb3640-88) is used in electrical installation (such as the installation of industrial and civil buildings and electrical equipment and other works) to protect the wire of steel pipe.








4. LSAW steel pipe (yb242-63) is a pipe whose weld is parallel to the longitudinal direction of steel pipe. It is usually divided into metric welded steel pipe, thin-walled welded steel pipe, transformer cooling pipe, etc.








5. SSAW steel pipe (SY5036-83) for pressurized fluid transportation is a tube blank made of hot rolled steel coil, which is spiral formed at room temperature and welded by double-sided submerged arc welding for pressurized fluid transportation. The steel pipe has strong bearing capacity and good welding performance. It can be used safely and reliably after various strict scientific inspection and test. The steel pipe has large diameter and high transportation efficiency, which can save the pipeline investment. Therefore, it is mainly used to transport oil and gas pipelines.








6. the SSAW steel pipe (SY5037-83) used in the conventional low pressure fluid transportation is made of hot-rolled steel coil into tube blank, which is spirally shaped at room temperature and welded by double side automatic submerged arc welding or single side welding. It is used for the transmission of water, natural gas, air and steam as well as other general low-pressure fluids.








7. SSAW steel pipe (sy5040-83) is made of hot rolled steel coil as tube blank, spiral formed at room temperature, and made of double-sided submerged arc welding or high-frequency welding. Steel pipe for foundation piles of civil buildings, wharves, bridges, etc.








8. ERW steel pipe (sy5038-83) for pressurized fluid transmission is a tube blank made of hot rolled steel coil, which is spiral formed at room temperature and welded by high frequency lap welding for pressurized fluid transmission. The steel pipe has strong bearing capacity, good plasticity and is easy to be welded and machined. After strict and scientific inspection and testing, the pipeline is safe and reliable, with large diameter of steel pipe and high transportation efficiency, which can save the pipeline investment.








9. ERW steel pipe (sy5039-83) used for general low pressure fluid transmission is a tube blank made of hot rolled steel coil, which is spiral shaped under normal temperature and welded by high frequency lap welding. It is used for general low-pressure fluid transportation.