The welded steel pipe is also called a welded pipe. It is a steel pipe made of steel plate or steel belt and welded after curling.Welding steel pipe production technology is simple, high production efficiency, many varieties specifications, and small equipment assets, but generally lower than seamless steel pipes.Since the 1930s, with the rapid development of high -quality steel and steel rolling production and the advancement of welding and inspection technology, the quality of welds has been continuously improved.Slim steel tube.The welding steel pipe is divided into straight seam welded pipes and spiral welded pipes in the form of welds.
The production process of straight sewing pipes is simple, high production efficiency, low cost, and rapid development.The strength of the spiral tube is generally higher than that of the straight seam welded pipe. It can use a welded pipe with a larger diameter of the billet material, and can also use the same width to produce a tube with different welded pipes with different billet production pipes.However, compared with the same length of the same length, the length of the weld is increased by 30 ~ 100%, and the production speed is lower.Therefore, most of the smaller -caliber welded pipes are welded with straight seams, and most of the large -caliber welded pipes are mostly spiral welded.
1. Low-voltage fluid conveyor straight seam welding steel pipe (GB/T 3092-2008) is also called general welded pipes, commonly known as black pipes.It is a welded steel pipe that is used to transport water, gas, air, oil, and heating steam.Steel pipes are divided into ordinary steel pipes and thick steel pipes.The specifications of the steel pipe are expressed in the nominal caliber (MM), and the nominal caliber is the approximate value of the inner diameter.It is commonly used in inches, such as 11/2.Welding steel pipes for low -voltage fluid conveying are directly used to transport fluids, and they are also used as the original tube for welding steel pipes with galvanized welding steel pipe for low -voltage fluid transportation.
2. Low-voltage fluid conveyor welding steel pipe (GB/T 3091-2015) is also known as galvanized welding steel pipe, commonly known as white pipe.It is used to transport water, gas, air oil, heating steam, warm water, etc., such as low pressure fluids or other uses of hot -dip galvanized welding (furnace welding or welding) steel pipe.The thickness of the steel pipe is divided into ordinary galvanized steel pipes and thickened galvanized steel pipes.The specifications of the steel pipe are expressed in the nominal caliber (MM), and the nominal caliber is the approximate value of the inner diameter.It is commonly used in inches, such as 11/2.
3. Ordinary carbon steel wire casing (GB 3640-88) is a steel pipe used to protect the wires in electrical installation projects such as industrial and civilian buildings, installation of machinery and equipment.
4. Straight seam welded steel pipe (GB/T 13793-2016) is a steel pipe with longitudinal parallel welds and steel pipes.It is usually divided into public welding steel pipes, welding thin wall pipes, transformer cooling oil pipes, and so on.
5. Pressure fluid conveyor use of spiral joint buried arc welded steel pipes (SY 5036-83) is used as a tube blank with hot-rolled steel belts.Spiral sewing steel pipe.The steel pipe has strong pressure and good welding performance. After various strict scientific inspections and testing, use is safe and reliable.The steel pipe has large caliber, high conveying efficiency, and can save investment in laid pipelines.It is mainly used to transport pipelines for petroleum and natural gas.
6. Pressure fluid conveyor spiral seam high-frequency welding steel pipe (SY 5038-83) is used as a tube blank with hot-rolled steel belt.Pulling spiral seam high -frequency welding steel pipe.The steel pipe has strong pressure and good plasticity, which is convenient for welding and processing. After various strict and scientific tests and testing, the use of safety and reliability, large -scale steel pipe caliber, high conversion efficiency, and saving pipeline investment.It is mainly used to lay pipelines that transport oil, natural gas, etc.
7. Generally, low-voltage fluid conveyor for spiral joints (SY5037-83) is used as a tube blank with hot-rolled steel belt. It is often made of warm spiral.Water, gas, air, and steam general low -voltage fluid conveyor use buried arc welding steel pipes.
8. Generally, low-voltage fluid conversion for spiral seam high-frequency welding steel pipe (SY 5039-83) is used as a tube blank with hot-rolled steel belts.Spiral seam high -frequency welding steel pipe.
9. The pile with spiral welded steel pipe (SY 5040-83) is used as a tube blank with hot-rolled steel belt. It is often made of warm spirals and is made of double-sided buried arc welding or high-frequency welding.Basic piles such as docks and bridges.
