ASTM A691 EFW Pipe

Product Introduction

ASTM A691 EFW Pipe is a kind of welded steel pipe, which refers to a steel pipe with seams on the surface that is welded after bending and deforming steel strips or steel plates into round or square shapes. ASTM A691 EFW Pipe uses the Electric fusion welding process, which is a process in which metals are combined by heating the metal between one or several consumable electrodes and the workpiece.

Advantages

ASTM A691 EFW Pipe uses steel plate or strip steel as billet. With the rapid development of high-quality strip continuous rolling production and the advancement of welding and inspection technology, the quality of welds continues to improve, the variety and specifications of welded steel pipes are increasing. Welded steel pipes have lower cost and higher production efficiency than seamless steel pipes. The advantages of ASTM A691 EFW pipe are primarily demonstrated in the following areas:

High-strength performance: 1-1/4Cr grade tensile strength ≥415MPa, yield strength ≥205MPa, and elongation ≥22%;

High-temperature resistance: Operating temperatures reach 600°C, making it suitable for a variety of high-temperature environments;

Corrosion resistance: Containing 1.25% chromium significantly enhances resistance to oxidation and hydrogen sulfide corrosion.

Product Information

We are professional in manufacturing JCOE PIPE

The specification of JCOE PIPE

In the process of oil and gas transmission pipeline anticorrosion construction, straight seam steel pipe surface treatment is one of the key factors determine the service life of the pipeline corrosion, it is a solid combination of anti-corrosion layer and straight seam steel pipe can be provided. Research study of the specialized institutions, the life of the coating depends on the quality of coating types, coating and construction environment factors, such as straight seam steel pipe surface treatment effects on coating life accounted for about 50%, therefore, should be in strict accordance with the specification on the coating on the surface of straight seam steel pipe requirements, continuously improve the straight seam steel pipe surface treatment.

Straight seam steel pipe in addition to embroider method:

1, The spray derusting

Spray derusting is driven by high-power motor jet high-speed rotating blade, steel shot, steel grit, wire section, minerals and other abrasive in motor power under the action of centrifugal force of the straight seam steel pipe surface spray processing, not only can thoroughly remove oxide, rust and dirt, and straight seam steel pipe under the action of abrasive violent impact and friction, also can achieve the required uniform roughness.

2, cleaning

Using solvent, emulsion steel surface cleaning, to remove oil, grease, dirt, lubricants, and similar organic matter, but it cannot remove rust, scale, such as welding flux on the surface of the steel, so only as auxiliary means in the anti government job.

3, tools, cleaning

Main USES steel wire brush tool for steel surfaces such as grinding, can remove loose scale, rust, slag, etc. Hand tools can achieve derusting Sa2 level, power tool cleaning can reach grade Sa3, if solid iron oxide adhered on the surface of the steel, tool cleaning effect is not ideal, anchor pattern depth of anticorrosion construction requirements.

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