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Flange-connected plastic-coated steel pipes are a type of pipeline system connected by steel pipe flanges. They are composite pipes that combine the strength of steel pipes and the corrosion resistance of plastic coatings. They are widely used in fields with high requirements for corrosion resistance, high pressure resistance, and long life. This article mainly discusses the advantages and installation points of flange-connected plastic-coated steel pipes.
Structural composition:
It consists of plastic-coated steel pipes and flange connectors. Plastic-coated steel pipes are based on high-quality carbon structural steel or low-alloy steel, and the inner and outer plastic coatings are generally polymer materials such as polyethylene and epoxy resin. Flange connectors are usually made of carbon steel or stainless steel, and two sections of steel pipes are connected together by welding or bolting.
Connection advantages:
• Corrosion resistance: The plastic coating isolates the medium from the steel pipe and extends the service life.
• High strength: Steel flange connection, high pressure bearing capacity (up to 10MPa or more).
• Good sealing: Relying on bolt tightening and sealing gaskets, it can effectively prevent leakage of the pipeline system and ensure stable delivery of media such as fire water.
• Easy installation and maintenance: bolt connection during installation, easy disassembly and reassembly, convenient for later maintenance, replacement of parts or expansion and transformation of pipeline systems.
• Adapt to a variety of environments: the plastic coating makes the steel pipe corrosion-resistant, wear-resistant and impact-resistant, and the flange connection can withstand high pressure and can be used in fire protection systems of different pressure levels and harsh environments.
Installation points:
• Flange welding: Before welding, ensure that the end face of the steel pipe is flat and burr-free. Control the current, voltage and welding speed during welding to ensure that the weld is full and defect-free. After welding, check the verticality of the flange and the axis of the steel pipe and the coaxiality of the bolt holes of the flanges at both ends.
• Sealing treatment: Select a suitable sealing gasket, ensure that the gasket is in the correct position and without damage during installation, and tighten the bolts evenly so that the gasket can fully play its sealing role.
• Pipeline pairing: During installation, accurately align the plastic-coated steel pipe to be connected with the flange, align the bolt holes, and avoid forced pairing to damage the plastic coating or cause deformation and stress to the flange.
Application scenarios:
In fire protection systems, both fire hydrant systems and automatic sprinkler systems can reliably deliver fire water;
In the chemical industry, it can deliver corrosive media such as acids, alkalis, and salts;
In the field of water supply and drainage, it can be used for urban tap water delivery and sewage discharge pipelines, etc.
Read more: How are pipe flanges manufactured? or Pipe elbow and flange welding connection
Article source: https://article-realm.com/article/Business/72599-Advantages-and-installation-points-of-flange-connected-plastic-coated-steel-pipes.html
URL
https://www.hu-steel.com/product88_994.htmlHunan Standard Steel Co., Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products(casing pipe and drill pipe), hollow section (square tube and retangular tube) and pipe fittings (such as pipe flange,elbow,reducer). For more, visit: https://www.hu-steel.com // Email: sales@hu-steel.com
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