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.
Link to Nearyz Resources
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 are widely used due to their affordable price and the large selection of them on the market. In comparison to their alternative, seamless steel pipes, they are an attractive choice for cost-efficient projects in particular. Since there are so many welded pipes on the market, finding the right configuration of welded pipe for a particular job is quite easy. And there is an array of used and surplus welded steel pipe available for buyers who want to get the best deal. This is a major plus considering how high steel prices can be. When exploring steel pipe options, buyers should be aware of the different types of welded pipes to help find the right product for their needs.
Most kinds of welded steel pipes start out as flat steel plates. Some start out as an HR coil. Regardless, the process involves shaping a steel substrate into a desired shape and size, either in a spiral welded or straight seam configuration. There are three major types of welded steel pipes that differ slightly on how they are produced and the end result of their production. Below are the three main types of welded steel pipes:
ERW pipe is produced through a process of cold-forming a sheet of steel into the shape of a cylinder. Electrical current is passed through the sheet&#;s edges to heat it to the degree required to join and bond those edges. ERW pipe does not require the use of welding filler material. It can either be produced using high or low frequency. ERW pipe is strong, and its seams are often barely detectable.
LSAW pipe is produced by cold-forming a heavy carbon steel plate. This method of production results in a straight seam that extends across the entire length of the pipe externally. DSAW pipe follows a similar process but is double-submerged and results in a seam that extends across both the external length of the pipe and the internal length of the pipe. LSAW and DSAW pipes are generally sized between 12m and 20m. The quality and strength of this welding technique is quite impressive, and both LSAW and DSAW pipes are appropriate for applications that require high-pressure resistance.
This pipe is welded by winding either a steel plate or HR coil into a spiral shape. Spiral welded pipe may also be referred to as helical submerged arc welded (HSAW) pipe. Spiral welded pipe can reach particularly long lengths and result in a notable degree of thickness. Production of spiral welded pipe is usually fairly quick, efficient, and affordable.
The right type of welded steel pipe for your project will depend on factors such as the application, size required, thickness required, and resistance capabilities needed. All the types of welded steel pipes listed above can be excellent choices for a variety of projects. And there is a large selection of all three types available on the market to be purchased either new or used.
Eiffel Trading is the place to purchase new, used, and surplus structural steel! Our steel inventory ranges from used steel pipe pile, to brand new h-pile beams, to used steel sheet pile, and everything in between. Furthermore, our equipment offerings include used concrete formwork, used shoring systems, used push boats, and much more.
All of our listings are constantly being updated, but if you don&#;t see what you&#;re looking for, create a wanted listing.
Ready to sell your used heavy equipment or construction material? List your products today on Eiffel Trading&#;s online marketplace.
If you have any questions or would like additional information, please call us at 1-800-541- or .