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Maintenance Methods for Steel Plate Coiled Pipes

2022/12/12

Maintenance Methods for Steel Plate Coiled Pipes

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.

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How do you clean the inner cavity of a steel plate rolled pipe?

2022/12/01

How do you clean the inner cavity of a steel plate rolled pipe?

Throughout the entire manufacturing process of steel plate‑rolled pipes, oil stains, air‑oxidation scale from electric welding, and other contaminants may accumulate, making the surface easy to clean. For oil contamination, use an organic solvent or a caustic soda solution; if rust has formed, apply a specialized paint stripper. But how can hollow areas be thoroughly cleaned?

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What should be considered when bending hot-rolled steel coil pipe?

2022/11/21

What should be considered when bending hot-rolled steel coil pipe?

When fabricating thick‑walled steel plate spiral pipes, the rolling bearing pins and locating pins on the two upright columns serve as precise positioning references. It is essential to ensure that the upper or lower load‑bearing beams are securely fastened to the left or right upright columns using high‑strength bolts, forming a single integral unit. During fabrication, special attention must be paid to the proper mating between the rolling bearing pins of the steel plate spiral pipe and their corresponding pin holes; installation should also clearly identify the matching marks. Throughout the entire manufacturing process, since the four guide rails come in two distinct specifications with significantly different overall widths, the steel plate spiral pipe must have its four guide rails mounted on the inner wall of the sound‑card frame, with the two wider ones installed on the transmission…

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Welding methods for steel plate spiral pipes

2022/11/11

Welding methods for steel plate spiral pipes

Steel plate coiled pipe refers to a seamless pipe formed by bending steel strip or carbon steel plate into a circular or square shape and then welding the seams on the surface. The billet for welded seamless pipes is either carbon steel plate or steel strip. How can steel strip or carbon steel plate be joined together using electric arc welding? What are the specific welding methods?

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Connection method of spiral pipes

2022/11/01

Connection method of spiral pipes

In general, spiral‑wound pipes are joined by electric‑arc welding. Because welded steel pipes are relatively low‑cost, certain projects—due to constraints such as construction schedules, site conditions, and topography—may also employ alternative connection methods, including threaded joints, flanged connections, hot‑melt joints, and grooved couplings.

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Production process of spiral tubes

2022/10/24

Production process of spiral tubes

The production process for longitudinal‑seam spiral pipes is simple, with high manufacturing efficiency and low costs, enabling rapid market growth. Spiral pipes generally offer higher strength than straight‑seam steel pipes; they can be produced from narrow billets to yield welded pipes with larger diameters, or from billets of the same length to manufacture welded pipes of varying diameters. However, compared with straight‑seam pipes of the same length, spiral pipes have a weld seam that is 30% to 100% longer, and their production efficiency is lower. Consequently, smaller‑diameter welded pipes typically use the straight‑seam welding process, while large‑diameter welded pipes are predominantly manufactured as spiral pipes.

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What is a double-sided submerged-arc welded spiral pipe?

2022/10/12

What is a double-sided submerged-arc welded spiral pipe?

Double-sided submerged-arc welded spiral pipes are commonly referred to as spiral pipes. With their high pressure resistance, low frictional drag, excellent low‑temperature performance, superior corrosion resistance, and ease of maintenance and installation, they are increasingly favored in sectors such as the petrochemical industry, coal‑slurry transportation, and urban planning and construction. The manufacturing process begins with full‑plate ultrasonic testing.

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Precautions for Spiral Tubes

2022/10/09

Precautions for Spiral Tubes

Fixed-length spiral pipes shall not be strapped. The ends of spiral pipes equipped with wire‑reinforced couplings must be fitted with threaded protectors, and the threads should be coated with lubricant or rust inhibitor. The ends of spiral steel pipes may be cut off; as required, protective caps can be installed on both ends of the pipe openings. Packaging for spiral pipes shall prevent loosening and damage during normal handling, transportation, and storage.

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