Seamless Steel Pipe

Anti-corrosion steel pipes play important and different roles in people's daily lives. Anti-corrosion steel pipes generally refer to the use of special processes to perform anti-corrosion treatment on ordinary steel pipes, so that the steel pipes have a certain anti-corrosion ability. They are generally used for waterproofing, Anti-rust, anti-acid and alkali, anti-oxidation and other properties. Generally speaking, PE anti-corrosion steel pipe refers to polyethylene anti-corrosion steel pipe, which is a tubular item processed using advanced science and technology. PE anti-corrosion steel pipe is widely used in petroleum, Natural gas, city gas, urban water supply, coal water slurry transmission pipelines, etc. Corresponding anti-corrosion measures can be taken for the inner and outer walls of spiral welded pipes according to different needs. The common ones include epoxy coal pitch anti-corrosion steel pipes, polyurethane coating anti-corrosion, anti-corrosion steel pip...

 In industrial production and daily life, spiral welded pipes are widely used in various engineering projects. However, spiral steel pipes are prone to rust in humid and polluted environments, which will not only affect their service life but also pose a threat to safety. So, how to prevent spiral welded steel pipes from rusting? The following are some practical protective measures recommended by carbon steel pipe manufacturers. 1. Choose high-quality materials First of all, choosing high-quality spiral welded steel pipe materials is the key to preventing rust. High-quality materials usually contain more alloying elements, such as chromium, nickel, etc., which can enhance the corrosion resistance of spiral welded pipes. When purchasing, you should choose qualified products that have undergone strict quality testing. 2. The importance of surface treatment Coating or plating the surface of spiral steel pipes is an effective way to prevent rust. Commonly used surface tre...

 The common defects of spiral pipes include pores, slag inclusions, incomplete penetration, incomplete fusion and cracks, etc. The Xinyue Steel will introduce the causes of these defects below. The defects that are prone to occur in the submerged arc welding zone of the spiral welded pipe are: 1. Involvement of welding slag Weld slag is a part of welding slag remaining in the weld metal. 2. Poor penetration The metal overlap of the inner and outer welds is not enough, and sometimes there is no penetration. This situation is called insufficient penetration. 3. Undercut The undercut is a V-shaped groove along the centerline of the weld, and the undercut is produced under improper conditions such as welding speed, current, and voltage. Among them, if the welding speed is too high, it is more likely to cause undercut defects than if the current is not suitable. 4. Bubbles Most of the bubbles occur in the center of the weld bead. The main reason is that hydrogen is still hidden in the w...

The outer coating of welded pipe FBE fused epoxy powder (FUSION BOND EPOXY) anti-corrosion steel pipe is a new type of anti-corrosion coating developed in the past 30 years. The coating has the characteristics of simple coating operation, no pollution, good impact resistance and bending resistance, and high temperature resistance, and has been widely used abroad. Powder coating is a solvent-free solid powder coating, which has the characteristics of no solvent, no pollution, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. They are stable in storage at room temperature. After electrostatic spraying, friction spraying (thermosetting method), or fluidized bed dipping (thermoplastic method), they are then heated and baked to melt and solidify to form a flat and bright permanent coating to achieve decoration. and anti-corrosion purpose. Production process of FBE epoxy powder anti-corrosion spiral welded pipe: Spiral welded pipe FBE coa...

 On 5th September , 2018, Singapore customer Kance Liang placed an order for more than 100 tons of spiral welded pipe. On October 16, 2018, Mr. Kance Liang reported that he had already received total six containers for the order. After the goods were taken, the inside diameter, outer diameter, wall thickness, length, etc. were tested by customer. Customer engineer feedback all the specifications are in line with the requirements of the standard and engineering design. I met with Kance Liang through the social platform. At that time, the project has reached the procurement stage. The customer wants the goods very urgently, after confirmed all the details, the customer proposed the target price,considering the first cooperation, they asked us to provide all the qualification certificates, as well as the historical project materials, after the customer review, they are very satisfied.?The target price was adjusted immediately, and we hit it off. The first cooperation we did great supp...

　　 Classified by Production Methods 　　1.Seamless Steel Pipe- hot rolled seamless steel pipe , cold rolled seamless steel pipe, cold drawn seamless steel pipe 　　2. Welded Steel Pipe - longitudinal welded pipe, spiral welded pipe, electric resistance welded pipe 　　 Classified by Cross-sectional Shape 　　1. Simple section steel pipe - round carbon steel pipe, square carbon steel pipe, rectangular carbon steel pipe, oval carbon steel pipe ect. 　　2. Complex section steel pipe - hexagonal carbon steel pipe with unequal edge, five plum shaped carbon steel pipe, double convex carbon stee pipe, double concave carbon steel pipe ect. 　 　Classified by Wall Thickness 　　1. Thin walled carbon steel pipe 　　2. Thick walled carbon steel pipe 　　Classified by the Application 　　Carbon steel pipe can be used for thermal equipment, machinery industrial pipe, oil line pipe, geological drilling steel pipe, container steel pipe, chemical industry steel pipe, and other special purpose steel pi...

　　Spiral welded pipe (some people call it SSAW steel pipe) is also a kind of welded pipe, its strength is generally higher than the LSAW steel pipe. Spiral welded pipe with large diameter can be produced by the narrow blank, and SSAW steel pipe with different diameter can also be produced by the same width of blank. However, compared with the same length of the straight pipe, the weld length increased by 30 to 100%, and the production rate is low. Therefore, the smaller diameter of the pipe mostly use LSAW steel pipe, large diameter welded pipe mostly use spiral welded pipe. 　　The production process of spiral welded pipe 　　Spiral welded pipe is the steel pipe with spiral seam that using the strip coil as raw material, extrusion forming under normal temperature, and using automatic double wire double-sided submerged arc welding process to weld. 　　1.Raw materials are coil, wire, flux. Those must finish the rigorous physical and chemical testing before putting into. 　　2.The head ...

　　Large diameter LSAW steel pipe is made of steel plate or steel strip after bending (electric model 0317 and check 6012755 standard) and then is made of by high-frequency welding and submerged arc welding. According to the form of seam welded steel pipe is divided into LSAW steel pipe and spiral welded pipe. According to the use it is divided into general welded pipe, galvanized steel pipe, blowing oxygen pipe, wire casing, metric pipe, roller tube, deep well pump, automotive tube, transformer tube, welded thin-walled tube, welded pipe and spiral welded pipe. 　　Large diameter LSAW steel pipe is used to transport low pressure fluid. Implementation of the standard is GB/T0317 No. 6012889. It is manufactured with Q195A, Q215A, Q235A steel. It can also be made of other mild steel that is easy to weld. Steel pipe must be tested by water pressure, bending, flattening and other experiments, the surface quality has certain requirements, the delivery length usually is 4-10m, and it often re...

　　 Welded steel pipe , also known as welded pipe, it is made of steel sheet or strip that experience crimp forming welding. The production technology of welded steel pipe is simple, with high production efficiency, various specifications, less equipment investment, but the general strength is lower than the seamless steel pipe. Since the 1930s, with the rapid development of high quality strip steel rolling production and the progress of welding and inspection technology, the weld quality constantly improves. Welded steel pipe specifications increase day by day, and replace seamless steel pipe in more and more field. In terms of the form of welded steel pipe, it can be divided into the weld seam welded pipe and spiral welded pipe. 　　The billet that welded steel pipe adopted is steel plate or strip steel. Because of the different welding process, welded steel pipe is divided into furnace welded pipe, welded (erw) pipe and automatic arc welding pipe. Due to its different welding form, i...

　　Spiral pipe is a very widely used pipe, sometimes it may require welding, but spiral pipe exsit welding defects. 　　Under normal circumstances, weld defects of spiral pipe has porosity, undercut and crack phenomena. 　　Helical tube bubble defects: conducting spiral welded, in the center of the weld bead, there will be the situation of bubble defects, will produce this situation? Main reason is that, in the welding process is hydrogen bubbles form of residue inside the metal. How to solve this failure? Welding process, we need to clear weld the inside of the oil, water and other ingredients, but also need good drying and removing moisture, so that hydrogen does not remain inside the weld . Increasing the welding current in the welding process and the generation of the bubble can be avoided yet. 　　Spiral undercut: v-shaped groove weld edge, and along the weld centerline, said undercut. Usually undercut is inappropriate because of the current, voltage and welding speed, therefore, t...

    Large diameter steel pipe is the pipe material with outer diameter greater than 1000mm, steel ingot is made of perforated or solid billet through the capillary tube, and then hot rolled, cold-rolled or cold call is made.     Large diameter steel pipe is coated large diameter spiral welded pipe and high-frequency welded pipe made of plastic coating on the basis of the maximum diameter of the nozzle.     1200mm, can be coated with polyvinyl chloride according to different needs (PVC), polyethylene (PE), epoxy resin (EPOZY) and other various properties of plastic coating, good adhesion, corrosion resistance, can be resistant to acid , alkali and other chemical corrosion, non-toxic, does not rust, abrasion resistance, impact resistance, permeability, smooth pipe surface, do not adhere to any substance that can reduce transmission of resistance, increase traffic and transportation efficiency and reduce transport pressure loss. Coating solvent-free, no le...

    Welded pipe is the common pipe material in gas pipeline, greater than 426 mm in diameter (508 mm) or the welded pipe is generally referred to as the large diameter welded pipe, according to the welding as a way for tube, can be divided into spiral welded pipe and straight seam welded pipe.     Spiral welded pipe is the low carbon carbon structural steel and low alloy structural steel strip according to certain helix Angle (also called the molding Angle) rolled into a tube billet, then pipe seam welding made up, it can use a narrow strip in the production of large diameter steel pipe. Spiral welded pipe is mainly spiral submerged arc welding (SSAW), widely used in all kinds of gas pipeline construction in our country, its specification in diameter * wall thickness. Spiral welded pipe with one-side welding and double welding, tube welding shall ensure that the water pressure test, the tensile strength and cold bending properties of the weld in accordance with reg...

    Lots of cities in the whole world are now using the steel pipes, wedge gate valves for various engineering project. Why? Due to the pursuit of speed, thus the steel pipe, like the spiral welded pipe would be in large demand for customers.     Finally, with the help of steel pipe, all pipes can quickly be installed by one person and uses only one single stainless steel bolt, saving time, labor and money. No doubt that all of the cities need the steel pipe for water, oil and gas transportation purpose and engineers have found the steel pipes' ease of installation which makes them stand out from other pipe products. For example, the demand is "we have to get the water and oil on as soon as possible safely". Thus, the steel pipes would be the first option for its high quality, guarantee of no leak during the transportation. Because of the corrosion resistance, they are now widely applied in water engineering, petrochemical industry, chemical industry, power industr...