Welded steel pipe is a steel pipe welded with steel plates or steel strips. Welded steel pipes have the advantages of simple production technology, high production efficiency, many varieties, and low equipment costs, but the overall strength is lower than seamless steel pipes.
Welded steel pipes can be divided into straight seam welded pipes(LSAW Steel Pipe) and spiral welded pipes(SSAW Steel Pipe). The straight seam welded pipe process is simple, has high production efficiency, low cost and is developing rapidly. The strength of spiral welded pipes is generally higher than that of straight welded pipes, and welded pipes of different diameters can be produced with the same billet width. However, compared with straight seam pipes of the same length, the weld lengths are increased by 30% and 100% respectively, and the production speed is lower. Therefore, most small diameter straight seam welded pipes are mostly spiral welded. This article will introduce the types of welded steel pipes.
1. Welded steel pipes can be used for low-pressure fluid transportation, also known as ordinary welded pipes, commonly known as black pipes. Used to transport low-pressure liquid water, air, gas, oil, steam heating, etc. The wall thickness of steel pipes for connection is divided into ordinary steel pipes and thickened steel pipes, which are divided into non-threaded steel pipes (smooth steel pipes) and threaded steel pipes. Steel pipe specifications are expressed in nominal diameter (Mm), which is the approximate value of the inner diameter. It is customary to use inches, such as 11 inches, 2 inches, etc. Welded steel pipes are used for low-pressure fluids, not only for direct delivery of fluids, but also as raw materials for galvanized welded steel pipes for low-pressure fluids.
2. Galvanized welded steel pipes can be used to transport low-pressure working fluids, also known as galvanized welded steel pipes, commonly known as white pipes. Used to transport water, gas, gas, oil and other general low-pressure fluids, such as heating steam, warm water or other hot-dip galvanized welded steel pipes (electric furnace welding or electric welding). Steel pipe walls are divided into ordinary galvanized steel and galvanized thick steel, galvanized steel and threaded galvanized steel plates without threads. Steel pipe specifications are expressed in nominal diameter (Mm), which is the approximate value of the inner diameter. Usually inches are used, such as 11x2, etc.
3. Ordinary carbon steel sleeves are protective sleeves for industrial and civil buildings, installation of wire machinery and other devices, and electrical installations.
4. Straight seam welded steel pipe is a steel pipe that is parallel to the longitudinal research of steel pipes. It can usually be divided into metric welding process steel pipes, welding material thin-walled steel pipes, transformer cooling pipes, etc.
5. Spiral submerged arc welded steel pipe is a spiral welded steel pipe made of hot-rolled strip steel as the tube blank, which is often formed at high temperatures. Double-sided submerged arc welding is used for pressure fluid transfer. Steel pipes have strong load-bearing capacity and good weldability. After various rigorous scientific and technical tests and experiments, it is reliable to use. Mainly used for pipeline transportation of oil and natural gas.
6. Spiral seam high-frequency welded steel pipe for pressure fluid transportation is a spiral seam high-frequency welded steel pipe, which is welded by high-frequency lap joint method. Hot-rolled steel strip coil is often used as a pipe blank. Strong bearing steel, plastic to facilitate welding process. After various strict scientific inspections and tests, it is reliable in use and is mainly used for the laying of oil and gas pipelines.
7. The spiral submerged arc welded steel pipe for low-pressure transportation is made of hot-rolled strip steel as a billet, the spiral submerged arc welded steel pipe is a room-temperature spiral low-pressure conveying steel pipe, and the hot-rolled steel strip is a pipe blank. It is used for general water, gas, steam, etc. Low pressure fluid transfer.
8. Generally, spiral seam high-frequency welded steel pipes for low-pressure fluid work transportation are mainly formed at room temperature using hot-rolled strip steel as tube blanks. A high-frequency lap joint method is used to weld the high-frequency welded steel pipes with spiral welds. Generally All are used for low-pressure fluid transportation.
Welded steel pipes can be divided into straight seam welded pipes(LSAW Steel Pipe) and spiral welded pipes(SSAW Steel Pipe). The straight seam welded pipe process is simple, has high production efficiency, low cost and is developing rapidly. The strength of spiral welded pipes is generally higher than that of straight welded pipes, and welded pipes of different diameters can be produced with the same billet width. However, compared with straight seam pipes of the same length, the weld lengths are increased by 30% and 100% respectively, and the production speed is lower. Therefore, most small diameter straight seam welded pipes are mostly spiral welded. This article will introduce the types of welded steel pipes.
1. Welded steel pipes can be used for low-pressure fluid transportation, also known as ordinary welded pipes, commonly known as black pipes. Used to transport low-pressure liquid water, air, gas, oil, steam heating, etc. The wall thickness of steel pipes for connection is divided into ordinary steel pipes and thickened steel pipes, which are divided into non-threaded steel pipes (smooth steel pipes) and threaded steel pipes. Steel pipe specifications are expressed in nominal diameter (Mm), which is the approximate value of the inner diameter. It is customary to use inches, such as 11 inches, 2 inches, etc. Welded steel pipes are used for low-pressure fluids, not only for direct delivery of fluids, but also as raw materials for galvanized welded steel pipes for low-pressure fluids.
2. Galvanized welded steel pipes can be used to transport low-pressure working fluids, also known as galvanized welded steel pipes, commonly known as white pipes. Used to transport water, gas, gas, oil and other general low-pressure fluids, such as heating steam, warm water or other hot-dip galvanized welded steel pipes (electric furnace welding or electric welding). Steel pipe walls are divided into ordinary galvanized steel and galvanized thick steel, galvanized steel and threaded galvanized steel plates without threads. Steel pipe specifications are expressed in nominal diameter (Mm), which is the approximate value of the inner diameter. Usually inches are used, such as 11x2, etc.
3. Ordinary carbon steel sleeves are protective sleeves for industrial and civil buildings, installation of wire machinery and other devices, and electrical installations.
4. Straight seam welded steel pipe is a steel pipe that is parallel to the longitudinal research of steel pipes. It can usually be divided into metric welding process steel pipes, welding material thin-walled steel pipes, transformer cooling pipes, etc.
5. Spiral submerged arc welded steel pipe is a spiral welded steel pipe made of hot-rolled strip steel as the tube blank, which is often formed at high temperatures. Double-sided submerged arc welding is used for pressure fluid transfer. Steel pipes have strong load-bearing capacity and good weldability. After various rigorous scientific and technical tests and experiments, it is reliable to use. Mainly used for pipeline transportation of oil and natural gas.
6. Spiral seam high-frequency welded steel pipe for pressure fluid transportation is a spiral seam high-frequency welded steel pipe, which is welded by high-frequency lap joint method. Hot-rolled steel strip coil is often used as a pipe blank. Strong bearing steel, plastic to facilitate welding process. After various strict scientific inspections and tests, it is reliable in use and is mainly used for the laying of oil and gas pipelines.
7. The spiral submerged arc welded steel pipe for low-pressure transportation is made of hot-rolled strip steel as a billet, the spiral submerged arc welded steel pipe is a room-temperature spiral low-pressure conveying steel pipe, and the hot-rolled steel strip is a pipe blank. It is used for general water, gas, steam, etc. Low pressure fluid transfer.
8. Generally, spiral seam high-frequency welded steel pipes for low-pressure fluid work transportation are mainly formed at room temperature using hot-rolled strip steel as tube blanks. A high-frequency lap joint method is used to weld the high-frequency welded steel pipes with spiral welds. Generally All are used for low-pressure fluid transportation.
