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What is ERW pipe? Electric resistance welding (ERW) is a welding process in which metal parts in contact are permanently joined by heating them with an electric current, melting the metal at the joint.Electric resistance welding is widely used, for example, in manufacture of steel pipe and in assembly of bodies for automobiles. ERW steel pipe is a straight seam welded pipe manufactured by high frequency resistance welding process. Its raw material is usually hot rolled coil. This manufacturing method enables ERW steel pipe to have more precise outer diameter control and wall thickness tolerance.Key Features:Material: High-quality carbon steel or low-alloy steel is selected to ensure excellent mechanical properties.Production Process: The edges of the tube billet are heated to welding temperature using resistance heat generated by high-frequency current, and then pressure is applied to complete the weld, eliminating the need for filler metal.Specifications: Outer diameters range from 1/2" to 24" with customizable wall thickness.Surface Treatment: A variety of surface treatments are available, including black coating, galvanizing, and painting, for enhanced corrosion resistance.Applications: Suitable for construction, bridge construction, oil and gas transportation, water supply and drainage systems, and more.

The possibilities for using steel in buildings and infrastructure are limitless. The most common applications are listed below.For buildingsStructural sections: these provide a strong, stiff frame for the building and make up 25% of the steel use in buildings.Reinforcing bars: these add tensile strength and stiffness to concrete and make up 44% of steel use in buildings. Steel is used because it binds well to concrete, has a similar thermal expansion coefficient and is strong and relatively cost-effective. Reinforced concrete is also used to provide deep foundations and basements and is currently the world’s primary building material.Sheet products: 31% is in sheet products such as roofing, purlins, internal walls, ceilings, cladding, and insulating panels for exterior walls.Non-structural steel: steel is also found in many non-structural applications in buildings, such as heating and cooling equipment and interior ducting.Internal fixtures and fittings such as rails, shelving and stairs are also made of steel. For infrastructureTransport networks: steel is required for bridges, tunnels, rail track and in constructing buildings such as fueling stations, train stations, ports and airports. About 60% of steel use in this application is as rebar and the rest is sections, plates and rail track.Utilities (fuel, water, power): over 50% of the steel used for this application is in underground pipelines to distribute water to and from housing, and to distribute gas. The rest is mainly rebar for power stations and pumping houses.

Yes,you can get available samples in our stock.Free for real samples, but customers need to pay the freight cost.

Title A: 1.We keep good quality and competitive price to ensure our customers' benefit.2.We respect every customer as our riend and we sincerrly do business and make friends with them, no matter where they come from.

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Quality/Quantiy Claims:The Buyer is entitled to make both quality and quantity claim in writing against the Seller within 90 days after arrival at the port of destination.

We have a professional laboratory, And professional testing personnel.

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Generally it is 3-5 days if goods are in stock. or around 25 days if the goods are not in stock and it is according to order requirement

Is there a difference between galvanized and hot dipped galvanized? The key difference between galvanized and hot dip galvanized is that most galvanized materials have a smooth and sharp finishing, whereas hot sip galvanized structures have a rough finishing. Galvanization is a process of preventing metal surfaces from corrosion

Image result for Hot dip galvanized square steel pipeIn long-term, continuous exposure, the recommended maximum temperature for hot-dip galvanized steel is 200 °C (392 °F), according to the American Galvanizers Association. The use of galvanized steel at temperatures above this will result in peeling of the zinc at the inter metallic layer.