Difference Between Features of Welded Steel Pipe and Seamless Pipe
Seamless steel pipe is different from welded steel pipe. Features of the two types are different. It is no wonder that they are used for different objectives. For instance, if you are in pursuit of stronger pipes, seamless steel pipe is a better solution. Seams can weaken the strength of pipes and thus, the seamless structure can enhance the durability. Thereby, for both domestic and industrial sectors, they have to purchase more expensive seamless pipes if they are seeking for stronger solutions.
As the abovementioned features, the strength helps seamless pipes occupy an essential position in heavy duty industry. Their reliably allow them to endure the harshest working environment. In addition, as other steel pipes can do, they are highly resistant to rust and corrosion, let alone high temperature and pressure. If you are looking for the pipes designed with some special features, you need to consult with the manufacturers.
Seamless pipes are made from steel ingot through heating and inserting process. The pipe is firstly heated to high temperature and then a rod can be used to insert in it to create a hollow structure. The manufacturing process is more difficult than it seems to be. Advanced techniques and skillful operation are needed to complete the production process. The reputable manufacturer would test the quality of the pipes strictly and an additional coat would be used to cover the pipe.
The features of steel pipes offered by different distributors can be different. The solid pipes are mainly used for construction industry and the hollow pipes are used to convey various materials. The shape of the pipes can be square, round, rectangular and triangular. You can purchase the suitable type to complete a successful project. Compared with seamless pipes, welded steel pipe is much cheaper and it can be used in various industrial fields as well. Steel pipes are separated into wide varieties. There are number of types of steel pipes used for high quality project. For example, we are offering the best API pipe at best price.
Applications of Welded Steel Pipe
The continuity of the production of ERW pipes according to the various diameters is gradually and continuously maintained in the welding stands. After the pipes are produced, several type tests are carried out to verify the mechanical, the chemical and the physical properties of the pipes thoroughly.
ERW pipes are the abbreviated form of the Electrical Resistance Welded Pipes. The demand for these pipes has risen exponentially in the recent years to a huge extent. They are used in a diversified range of application in the railings, gravity flow, conveyors and several other mechanical and piping systems.
Manufacturing Process of the Electrical Resistance Welding Pipes:
These electrically resistant pipes are manufactured from the hot rolled coils or the seam plates. These rolled coils are levelled and processed by the shearing force and the coil ends are then welded by electrical resistance welding method for reducing the losses and maintaining the continuity. The continuity of the production according to the various diameters is gradually and continuously maintained in the welding stands. After the pipes are produced, several type tests are carried out to verify the mechanical, the chemical and the physical properties of the pipes thoroughly. Once the tests are completed successfully, the Electrical Resistance Welding pipes are manufactured.
Classification of the Electrical Resistance Welding Pipes:
These pipes are generally classified into two categories according to the general forms of the pipes: the longitudinal Pipes and the Spiral Pipes. While in accordance to the applications of the pipes, they are widely classified into several categories. And they are1. Galvanized pipes with zinc coating on the surface2. Blow oxygen pipes used for blowing oxygen especially for the manufacturing of the pipes of small diameters.3. Electrical welding pipes generally used for conduit electrical wiring.4. Welding thin walled tube used for making toys, furniture etc.
Features of Electrical Resistance Welding Pipes:
The ERW pipes are of low grained, high performance, high deformability, high tolerance in their dimensions, high quality, high strength, wide applications, huge longevity and superior finishing with corrosion proof coating on the surface. They are known for their excellence in their field of working and strict maintenance of the high quality standards and specifications. These pipes are available in various shapes and sizes. There are several factors that have contributed to the popularity of these pipes over the others. And these are their various physical properties, their quite an affordable cost and many others.
Applications of Electrical Resistance Welding Pipes:
These pipes have a huge round of applications in the various fields of the industries. They are used in the engineering fields, agricultural fields etc. They are also used for fencing, line purposes of various pumps and many more. They are used to manufacture the various joints like the tees, elbows, reducers etc. in the various fittings. Also, these pipes are used for transportation of various flammable and inflammable liquids and gases for over miles and miles. They are widely used in the industrial world. This gain in popularity has resulted in the floating of the various tenders in the market through several sources. Some of them are direct from the public and the private sectors and others from the various indirect sources.. And thus these ERW pipes have provided a profitable business to the various business houses all across the world to a huge extent.
Classification And Production Methods Of Welded Steel Pipe
Welded steel pipes are created by taking flat substrates, such as HR coil or a steel plate and shaping then welding them. The pipe is then classified based on the approach used. One thing professionals consider is if the steel pipe is spiral welded or straight seam welded. Others device the material based on the purpose – i.e. manufacturing, agricultural, oil drilling, mining, etc.One of the most common ways to classify a welded steel pipe is to look at the process used. This means classifying the steel pipes based on the production methods or the sub-processes. The results achieved will fall into one of the three following classifications.
ERW – Electric Resistance Welded
This process is either low or high frequency. It is restricted to a size of (maximum) about 24” in diameter. This welded steel pipe results from the longitudinally welded HR coil.
DSAW or LSAW – Longitudinal
The primary substrate used in this method is a heavy steel plate. Producers will choose one of the following two methods, which include:Submerged arc welded – SAWDouble submerged arc welded – DSAWThe flat plate that results will have a straight seam stretched the entire length of the pipe. The standard sizes for this pipe option range between 12 and 18m. When this method is used, the quality of the weld is higher and features fewer defects.
Spiral Welded Longitudinal or Spiral Welded
This process, just as the name implies, results from a circular motion. The manufacturer will take the plate and wind and weld the substrate of the steel plate or HR coil in a spiral. This is a method that is referred to as helical submerged arc welded (HSAW). The product resulted is much thicker and longer than the other methods. In most cases, this is the preferred method because it is cost-effective, fast, efficient and simple.Regardless of how a welded steel pipe is classified, the market for distributors and producers is extremely strong. A company that offers a diverse option of welded steel pipes is able to maintain consistent profits. If you are searching for a company to provide you with the welded steel pipe you need, search for one that strives to exceed the expectations of the API regarding quality.
How many types of steel bars are there?
1.Carbon Steel Rebars
This is the most common type of rebar and is sometimes referred to as a "black bar." It's extremely versatile but it corrodes more easily than other types, making it inappropriate in areas that are subject to high humidity or in structures that are frequently exposed to water. Many consider carbon steel rebars to be the best option in all other types of construction, however.
2.Welded Wire Fabric
Welded wire fabric (WWF) is made from a series of steel wires arranged at right angles and electrically welded at all steel wire crossings. It can be used in slab-on-ground slabs where the ground has been well compacted. A heavier fabrication of welded wire fabric can be used in walls and structural floor slabs. This is commonly used in road pavement box culverts, drainage structures, and in small concrete canals.
3.Sheet-Metal Reinforcing Bars
Sheet-metal reinforcement is commonly used in floor slabs, stairs, and roof constuction. Sheet-metal reinforcing is composed of annealed sheet steel pieces bent into corrugations of about one-sixteenth of an inch deep with holes punched at regular spacing.
4.Epoxy-Coated RebarsEpoxy-coated rebars are expensive and used in areas that will be in contact with salt water or where a corrosion problem is imminent. The only problem is that the coating can be very delicate, so bars should be ordered from a reputable supplier.
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6.Stainless Steel Rebars
Stainless steel can be used as an alternative reinforcing steel bar with carbon steel reinforcement. Using stainless steel reinforcing bars will not create galvanic corrosion, and it can be a cost-effective solution in areas subject to corrosion problems or where repair is difficult and expensive. These rebars will cost at least eight times more than epoxy-coated rebars, however.
Galvanized rebars are 40 times more resistant to corrosion than carbon steer rebars, making them ideal for structures that will be heavily exposed to wet and humid conditions. They're pricey, however.
8.Expanded Metal or Wire Mesh Rebars
Expanded metal or wire mesh reinforcement is another good product for concrete. Expanded metal is made by shearing a sheet of steel into parallel lines that are then expanded to form a diamond shape or a square shape between each cut. Expanded metal is commonly used as reinforcement in areas where a considerable thickness of plaster is required, or to reinforce light concrete construction. Wire mesh reinforcement can be used on sidewalks, small concrete pads, or walkable surfaces that don't receive high live or load charges.
9.Glass-Fiber-Reinforced-Polymer (GFRP) Rebars
Similar to carbon fiber, GFRP rebars will not corrode—ever, under any conditions. You'll pay dearly for that, however. These rebars can run 10 times the cost of epoxy-coated rebars.