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Cangzhou Spiral Steel Pipe Factory: Introduction to Welding Repair Methods of Spiral Welded Pipes

Cangzhou Spiral Steel Pipe Factory: Introduction to Welding Repair Methods of Spiral Welded Pipes

Processing and welding of spiral welded pipes: Before welding, remove rust, oil, water, paint, etc., which are harmful to welding. Choose the electrode suitable for the steel grade. The spot welding time interval is shorter than that of carbon steel, so a spiral welding pipe brush should be used when removing welding slag. After welding, to prevent localized corrosion or loss of strength, the surface should be ground or cleaned.

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Hebei Spiral Steel Pipe Factory: How to Check the Quality of Spiral Steel Pipe

Hebei Spiral Steel Pipe Factory: How to Check the Quality of Spiral Steel Pipe

Before leaving the factory, the spiral steel pipe should be tested for mechanical properties, flattening and flaring, and should meet the requirements of the standard before leaving the factory. The quality inspection method of spiral steel pipe is as follows: 1. From the surface, that is, in the visual inspection. Visual inspection of welded joints is a simple and widely used inspection method, and it is also an important part of finished product inspection, mainly to find defects and dimensional deviations on the surface of welds. Generally, it is checked with the naked eye, with the aid of standard templates, gauges and magnifying glasses. If the surface of the weld is defective, the interior of the weld is estimated to be defective as well.

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2022

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Zhongyuan Pipeline: How to Insulate Anticorrosion Steel Pipe, Spiral Welded Pipe-Spiral Welded Pipe Manufacturer

Zhongyuan Pipeline: How to Insulate Anticorrosion Steel Pipe, Spiral Welded Pipe-Spiral Welded Pipe Manufacturer

There are many methods for anti-corrosion steel pipe insulation, and different methods should be selected according to different needs. 1. Anti-corrosion steel pipe insulation pipe coating insulation method Construction method, if using amorphous thermal insulation materials (such as expanded perlite, expanded frog stone, asbestos fiber, asbestos from asbestos powder, diatomite clinker, etc.), adding a binder (water glass, such as cement, refractory clay, etc.), Or add a coagulant (sodium fluorosilicate or Chardonnay), select a certain proportion of ingredients, add water, stir evenly, become a shaped clay block, and apply it on the insulation pipes and equipment by hand or tools, which is called smear method insulation.

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2022

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Do you know the mechanism of corrosion of anti-corrosion steel pipes? Cangzhou Zhongyuan Spiral Steel Pipe-Zhongyuan Spiral Steel Pipe

Do you know the mechanism of corrosion of anti-corrosion steel pipes? Cangzhou Zhongyuan Spiral Steel Pipe-Zhongyuan Spiral Steel Pipe

Do you know the cause of the corrosion reaction of anti-corrosion steel pipes? Briefly. The reason for the corrosion reaction of anti-corrosion steel pipe is to corrode the metal through the electrode potential difference. When the metal undergoes an electrochemical reaction, it is easy to lose electrons at a low electrode potential to form an anode. The part with high electrode potential receives electrons and becomes the cathode. In the presence of O2 and H2, iron (OH)2 produces hydrated elemental iron oxide (commonly referred to as elemental iron rust), which are loose substances floating on the surface of steel unprotected. The anodic reaction of the metal continues, that is, the corrosion continues, creating pits and perforations on the surface of the LPG pipeline. TPEP anti-corrosion steel

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2022

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3PE anti-corrosion steel pipe implementation standard who what? Spiral Steel Pipe-Cangzhou Spiral Steel Pipe Manufacturer

3PE anti-corrosion steel pipe implementation standard who what? Spiral Steel Pipe-Cangzhou Spiral Steel Pipe Manufacturer

3PE anti-corrosion steel pipes should meet the standards, mainly polyethylene and high-density polyethylene, with a Vicat softening point of not less than 110; the thickness of the external anti-corrosion layer is determined according to German standards, mainly composed of low-density and medium-density polyethylene. The impact strength of 3PE anti-corrosion coating is greatly improved. The mechanical strength and weather resistance of the 3PE anti-corrosion layer are clearly specified, and the sampling frequency of the peel strength of the joint is increased. 3PE anti-corrosion pipes are usually composed of roll forming, high frequency welding, extrusion, cooling, sizing, flying saw cutting, etc. The front end of the unit is provided with a material storage looper, and the rear end of the unit is provided with a steel pipe turning frame. According to yield effect and proximity effect, docking

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2022

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Which is the best 3PE steel pipe manufacturer

Which is the best 3PE steel pipe manufacturer

3PE anti-corrosion steel pipe refers to a three-layer structure of polyethylene coating (MAPEC) external anti-corrosion steel pipe, which is a commonly used anti-corrosion steel pipe in my country. There are other anti-corrosion methods, such as IPN8710, FBE epoxy powder, epoxy coal tar pitch, etc. Usually refers to the corrosion of the outer wall of the steel pipe. According to my country's statistics, the annual direct economic loss of domestic steel pipe corrosion exceeds 280 billion US dollars, while the current global annual loss of steel pipe corrosion is as high as 500 billion US dollars. Anti-corrosion steel pipes can effectively prevent or slow down corrosion, prolong the service life of steel pipes, and reduce the operating costs of steel pipes. So, which 3PE steel pipe is better? how to go

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Zhongyuan Pipeline Manufacturing Co., Ltd.

Add: Chengnan Industrial Park, Yanshan County, Hebei Province, 061300，P.R. China

Tel：0086-317-6090900

Tel：0086-317-6090812

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