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EFW pipe is a type of welded steel pipe, which refers to a steel pipe with joints on the surface formed by bending and deforming steel strips or plates into circular shapes and welding them together. EFW pipelines use electric fusion welding technology, which is a process that combines metal by heating one or more consumable electrodes and the metal between the workpiece.
keyword EFW electric fusion welded straight seam steel pipe Category Other Related products Get a quoteProduct Introduction
EFW pipe is a type of welded steel pipe, which refers to a steel pipe with joints on the surface formed by bending and deforming steel strips or plates into circular shapes and welding them together. EFW pipelines use electric fusion welding technology, which is a process that combines metal by heating one or more consumable electrodes and the metal between the workpiece.
advantage
EFW pipes use steel plates or strip steel as raw materials. With the rapid development of high-quality strip rolling production and the advancement of welding detection technology, the quality of welds continues to improve, and the variety and specifications of welded steel pipes are also constantly increasing. Welded steel pipes have lower costs and higher production efficiency than seamless steel pipes.
Outer diameter (OD): 457mm-1422mm (18 "-56") 219mm-1620mm
Wall thickness (W/T): 8mm-50mm
Length (L): 5800mm-12300mm
Materials: Q235, Q345, X42, X46, X52, X56, X60, X65, X70, X80, etc
Anti corrosion type and standard:
1. FBE/2FBE： CAN/CSA Z 245.20. DIN 30671
2.2LPE/3LPE: CAN/CSA Z 245.21. DIN 30670
3.2LPP/3LPP: DIN30678 NFA49711
Standards: API Spec 5L (PSL1, PSL2), ASTM A252, ASTM A672, ISO3183, etc
In the process of anti-corrosion construction of oil and gas transmission pipelines, surface treatment of straight seam steel pipes is one of the key factors determining the service life of pipeline anti-corrosion. It is the firm combination of anti-corrosion layer and straight seam steel pipes. Research from various professional institutions has shown that the lifespan of coatings depends on the type, quality, and construction environment factors of the coating. For example, surface treatment of straight seam steel pipes has an impact of about 50% on the lifespan of coatings. Therefore, the surface coating requirements for straight seam steel pipes should be strictly followed according to regulations, and the surface treatment of straight seam steel pipes should be continuously improved.
Straight seam steel pipes, except for embroidery method:
1. Sandblasting rust removal
Sandblasting rust removal is a process in which a high-power motor drives high-speed rotating blades, steel grit, steel shot, wire brush, mineral sand, and other abrasives to spray the surface of a straight seam steel pipe under the centrifugal force of the motor. This not only thoroughly removes oxide scale, rust, and old coatings, but also achieves the required uniform roughness of the straight seam steel pipe under the strong impact and friction of the abrasive.
2. Cleaning
Cleaning the surface of steel with solvents and emulsions can remove organic substances such as oil, grease, dust, etc., but cannot remove rust, oxide scale, welding flux, etc. on the surface of steel. Therefore, it can only be used as an auxiliary means for epidemic prevention work.
3. Tools/Cleaning
Main use: Steel wire tools are used for polishing steel surfaces, which can remove loose rust, slag, etc. Hand tools can achieve a Sa2 level iron removal effect, while electric tools can achieve an A3 level cleaning effect. If there is hard iron oxide attached to the steel surface, the tool cleaning effect is not ideal, and the anchor pattern depth cannot meet the requirements of anti-corrosion construction.
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
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