Maintenance Methods for Steel Plate Coiled Pipes

Release date:

2022-12-12

Author:

Source:

Category:

Company News

As the name suggests, steel plate rolled pipes are manufactured by rolling steel plates. They are primarily used in industries such as advertising signage, structural columns, and the fabrication of large-diameter shafts. Typically, the wall thickness of these pipes ranges from 6 to 20 mm; when cold-rolled, they can be produced with wall thicknesses between 20 and 35 mm.

　　 Steel plate rolled pipe As the name suggests, it is manufactured by rolling steel plates and is primarily used in industries such as signage, structural columns, and large‑diameter shaft fabrication. Typically, the wall thickness of rolled steel pipe ranges from 6 to 20 mm; when using cold‑rolling, thicker walls can be produced, ranging from 20 to 35 mm.

　　Continuous online production of steel‑plate spiral welded pipes faces a trade‑off: the thicker the wall, the larger and more expensive the mill and welding equipment, making the process less economical; conversely, as wall thickness decreases, the input‑output ratio declines. When such pipes are chosen, it is important to recognize that their manufacturing process—characterized by high dimensional accuracy, uniform wall thickness, and excellent internal and external surface finish—enables arbitrary scaling. Consequently, they offer both cost‑effectiveness and aesthetic appeal in high‑precision applications involving medium‑ and low‑pressure fluids. Another key advantage is their simple manufacturing process, which delivers high productivity, low costs, and rapid market adoption. In general, spiral‑welded pipes exhibit higher strength than straight‑seam pipes; for larger diameters, narrower blanks can be used, while the same blank width can accommodate various pipe sizes. Compared with straight‑seam pipes of the same length, spiral‑welded pipes achieve a 30% increase in production speed, though overall throughput remains lower. For this reason, small‑diameter spiral‑welded pipes typically employ straight‑seam welding, whereas large‑diameter ones generally use helical welding.

　　Although steel‑plate rolled pipes offer numerous advantages, they also require considerable maintenance. For instance, solvent‑based and emulsion‑based cleaning can still be used to remove oil contaminants from the steel surface; however, these methods cannot eliminate surface rust, oxide scale, welding flux, or other stubborn residues, so they serve only as auxiliary measures in anti‑corrosion applications. Subsequent manual derusting is then performed, primarily using wire brushes and similar tools to abrade the surface, thereby removing loose or protruding oxide scale, rust, weld spatter, and similar deposits. If iron oxide scale is firmly adhered to the steel surface, manual derusting proves ineffective, failing to achieve the required anchor profile depth for corrosion‑protective coating. Furthermore, chemical pickling—whether applied alone or in combination with other techniques—can remove scale, rust, and old coatings. Commonly employed are chemical pickling and electrolytic pickling, which are sometimes used as a post‑treatment step after sandblasting. While chemical cleaning can bring the surface to a specified level of cleanliness and roughness, the resulting anchor profile is relatively shallow, and it may readily lead to significant environmental pollution.

Key Points for Using Steel Plate Coiled Pipes

Straight-seam welded pipe manufacturer’s guide: Key considerations when selecting welded pipes.

More News

■

What are the product categories offered by spiral pipe manufacturers?

—

2023-05-11