Pengzhan Steel Pipes

What are the advantages of double-sided submerged arc welded pipe?


The development prospect of the double-sided submerged arc welded pipe industry is very good, because it brings more benefits to the enterprise when in use, so it is favored by customers. In order to let everyone know more, next we will talk about the advantages of double-sided submerged arc welded pipe, hoping to bring help to more people.
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An analysis of the factors that lead to porosity in the weld of double-sided submerged arc welded pipes.


As we all know, the quality of double-sided submerged arc welded pipe is determined by the quality of the weld. Once the weld of double-sided submerged arc welded pipe produces pores, it will not only affect the density of the weld, cause pipeline leakage, but also become the corrosion inducing point, seriously reduce the strength and toughness of the weld. Generally speaking, the moisture, dirt, oxide scale and iron filings in the flux, welding composition and covering thickness, steel plate surface quality, steel plate side plate treatment, welding process and steel pipe forming process may be the causes of weld porosity.
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Advantage sharing of double-sided submerged arc welded pipe


Double-sided submerged arc welded pipe is a welded steel pipe made of steel plate or steel strip after crimping. It has the advantages of small size deviation, uniform wall thickness, simple production process, high production efficiency, many varieties and specifications, and less equipment investment. However, because the welding performance of welded steel pipes is lower than that of seamless steel pipes, the utilization rate in petrochemical plants is very low. Double-sided submerged arc welded pipe is divided into straight seam and spiral seam according to the weld form.
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Advantages and characteristics of double-sided submerged arc welded pipe


The double-sided submerged arc welding pipe is protected by slag, but this slag is not the skin of the welding rod, but the welding flux specially melted. The flux system consists of a funnel-loaded flux delivered through a pipe to the front face to be welded. This is completely automated.
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How much do you know about several knowledge points of gas steel pipe?


With the gradual popularization and use of natural gas, new requirements have been put forward for gas pipelines in cities. This directly buried thermal insulation and heating steel pipe has the characteristics of thermal insulation and waterproof, corrosion resistance and heat resistance, and strong flame retardancy. Construction is more convenient, not afraid of plant root thorns and other excellent characteristics have become the construction industry transportation petrochemical and other departments of some special materials. The electrochemical reaction corrosion of urban gas steel pipes in soil can be divided into macro-cell corrosion and micro-cell corrosion, which mainly occur at the junction. When metal pipelines are distributed at the same time, it is easy to produce a large degree of corrosion at the boundary. The repair and replacement technology of trenchless pipelines has just started, the construction method is not mature, and some construction methods are even blank, so the follow-up maintenance of pipelines is difficult.
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Characteristics and precautions of gas steel pipe


Gas steel pipe a special kind of gas pipeline. Using metal gas hoses instead of traditional rubber hoses can solve the shortcomings of rubber hoses that are easy to fall off, easy to age, easy to be bitten by insects, and short service life.
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Common sense of safe distance of gas steel pipe and various facilities


With the rapid development of the local economy, construction activities along the pipeline have increased, and various facilities have been built around the pipeline. For the safe operation of pipelines and surrounding facilities, the distance between gas steel pipes and various facilities must meet the requirements of relevant national regulations.
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What is the role of the Ministry of standard tube


The local standard tube is also called spiral welded tube, which is made by winding the steel strip of low-carbon structural steel or low-alloy structural steel on the tube blank at a certain spiral angle (called forming angle) and welding the tube after sewing. Large-diameter steel pipes can be produced from narrow strip steel, so let's learn what are the functions of the lower standard pipes!
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The difference between spiral welded pipe and longitudinal submerged arc welded pipe


The main difference between spiral welded pipe and longitudinal welded pipe lies in the different welding forms. Spiral welded pipe is a low carbon structural steel or low alloy structural steel strip with a certain helix angle (also known as forming angle) rolled into tube blank, and then welded to make pipe seam. Large diameter steel pipes can be produced from narrow strip steel. Spiral welded pipes are mainly spiral submerged arc welded pipes (SSAW), which are used frequently in the construction of various gas pipelines in China. Its specifications are expressed in "outer diameter * wall thickness. Spiral welded pipe has single-sided welding and double-sided welding. The welded pipe shall ensure that the hydraulic test, tensile strength and cold bending performance of the weld meet the requirements.
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Characteristics of spiral welded pipe


Spiral welded pipe is a spiral seam steel pipe with steel coil as raw material, often warm extrusion, bending and forming into a spiral shape, using automatic double-sided submerged arc welding technology for inner seam and outer seam welding. The raw materials are strip coiling, welding wire and flux. The quality and performance of spiral welded pipe shall be determined according to the needs, and different element contents and types shall be matched according to the needs. So, the following together to understand the characteristics of spiral welded pipe!
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