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How to maintain and enhance the stability of spiral steel pipes

2019/04/17

How to maintain and enhance the stability of spiral steel pipes

How to Maintain and Enhance the Stability of Spiral Steel Pipes I. Medium- and small-sized structural steel, wire rod, reinforcing bars, medium‑diameter steel pipes, steel wires, and steel ropes may be stored in well‑ventilated sheds, provided they are covered on top and supported on the bottom. II. Certain small‑size steel products—such as thin steel plates, steel strips, silicon steel sheets, small‑diameter or thin‑walled steel pipes, various cold‑rolled and cold‑drawn steel items—as well as high‑value, corrosion‑prone metal goods, may be kept indoors in a warehouse. III. The site or warehouse for storing spiral steel pipe products should be located in a clean, well‑drained area, away from factories and mines that generate harmful gases or dust. The ground must be cleared of weeds and all debris to keep the steel clean. IV. Large‑section structural steel, rails, heavy steel plates, large‑diameter steel pipes, forgings, and similar items may be stacked outdoors. V. Warehouses must not store steel together with corrosive materials such as acids, alkalis, salts, or cement. Different grades of steel should be stored separately to avoid confusion and prevent contact corrosion. VI. Warehouse selection should be based on local conditions; generally, standard enclosed warehouses are preferred—structures with roofs, perimeter walls, tightly sealed doors and windows, and adequate ventilation systems. VII. Warehouses should ensure proper ventilation on sunny days and be kept closed to prevent moisture ingress during rainy weather, maintaining an appropriate storage environment at all times.

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Epoxy-Coated Steel Pipe Manufacturing Process

2019/04/07

Epoxy-Coated Steel Pipe Manufacturing Process

Epoxy‑Coated Anti‑Corrosion Steel Pipes I. Composition: 1. Steel pipes: including seamless steel pipes, straight‑seam steel pipes, spiral‑welded steel pipes, and various other steel pipelines. 2. Epoxy coating: This product is a two‑component, high-solids epoxy coating, available in primer and topcoat forms. Component A consists of epoxy resin, pigments, fillers, and additives; Component B is a modified amine‑based curing agent [1]. II. Properties and Applications: - Excellent durability: The cured epoxy film is tough, water‑resistant, non‑toxic, and environmentally harmless. - Strong adhesion: Outstanding bonding between coating layers. - Superior rust resistance and water resistance: Utilizing premium anti‑corrosion ingredients to ensure long‑term protection. - High mechanical strength: The coating film is robust, offering excellent wear resistance and impact resistance. - High solids content: Produces a relatively thick coating film. - Cures at room temperature: No need for large-scale baking equipment. Widely applicable for internal lining of water tanks, pipelines, reservoirs, water towers, and other water‑supply facilities, as well as for cargo holds transporting sugar, grains, and similar materials. It can also be used as an interior coating for swimming pools, power‑plant cooling towers, and metal or concrete structures storing fuel oil, gasoline, and other substances. III. Application and Storage: 1) Prior to coating, thoroughly clean the substrate surface of dust, oil, scale, and other contaminants to achieve Sa2.5 cleanliness, ensuring optimal coating quality. Avoid introducing any moisture during application. 2) Mixing procedure: Open Component A completely, add Component B to Component A, and mix thoroughly until uniform. Allow the mixture to mature for 30 minutes before application. 3) This material must be mixed and used immediately; any prepared coating should be applied within eight hours. Unmixed portions must be tightly sealed and stored. Halt work on rainy days or when relative humidity exceeds 75%. For areas exposed to severe corrosive environments, multiple coats are recommended. 4) Store the product in a cool, dry place, protected from direct sunlight, away from open flames and heat sources. Shelf life is twelve months; upon expiration, re‑evaluate all technical parameters. If the product meets the required specifications, it may continue to be used.

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Common Knowledge About Anti-Corrosion Spiral Pipes for Water Supply Pipelines

2018/08/30

Common Knowledge About Anti-Corrosion Spiral Pipes for Water Supply Pipelines

A city’s water supply volume is extremely large. As a result, when tap water flows through steel pipes, it exerts significant pressure on the pipeline. Under such conditions, ordinary steel pipes are prone to damage. In contrast, spiral‑welded steel pipes, thanks to their exceptional toughness, can withstand much higher pressures. Moreover, conventional steel pipes are susceptible to rust. For IPN8710 potable‑water pipelines, the quality of the internal anti‑corrosion coating is a primary concern for purchasers. The overall quality depends mainly on material grade, compliance with relevant standards, wall thickness, and weld integrity. When materials and standards are identical, wall thickness and weld quality become the key factors in assessing pipe performance. Given the wide range of applications for spiral‑welded steel pipes—such as support structures and water‑conveyance systems—even minor defects can compromise these projects; in severe cases, they may directly jeopardize public safety. Currently, most spiral‑welded pipes on the market exhibit wall‑thickness deviations, so products with narrower deviation ranges generally offer superior quality, greater pressure resistance, and stronger structural integrity. Weld quality is typically evaluated visually or by nondestructive testing; welds free of porosity and exhibiting uniformity are considered high‑grade.

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3PE-coated steel pipe for wastewater treatment

2018/08/30

3PE-coated steel pipe for wastewater treatment

3PE‑coated steel pipes: The 3PE coating is ideally suited for pipeline protection in complex terrains and under severe corrosion conditions. In oilfield construction, 3PE‑coated pipes have come to dominate applications in domestic oil, water, and gas transmission projects, thanks to their outstanding chemical resistance, superior mechanical protection, and long service life. These products are widely used in pipeline systems across industries including petroleum, natural gas, chemicals, power generation, defense, shipbuilding, papermaking, heating, water supply and drainage, hydropower stations, piling, bridge construction, and steel structures, earning consistent acclaim from a broad range of users.

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How are large-diameter spiral steel pipes manufactured?

2018/08/30

How are large-diameter spiral steel pipes manufactured?

Spiral pipes, also known as spiral steel pipes or spiral welded pipes, are manufactured by rolling low-carbon structural steel or low-alloy structural steel strips into a tubular blank at a specific helical angle—referred to as the forming angle—and then welding the seam. This process enables the production of large-diameter steel pipes from relatively narrow steel strips.

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Material Analysis of Spiral Welded Steel Pipes in Guangxi

2018/07/13

Material Analysis of Spiral Welded Steel Pipes in Guangxi

The main material grades of spiral welded steel pipes include: Q235A, Q235B, 20#, Q345 (16Mn), L245(B), L290 (X42), L320 (X46), L360 (X52), L390 (X56), L415 (X60), L450 (X65), L485 (X70), L555 (X80), L290NB/MB (X42N/M), L360NB/MB (X52N/M), L390NB/MB (X56N/M), L415NB/MB (X60N/M), L450MB (X65), L485MB (X70), and L555MB (X80).

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Guangxi Nanning Spiral Pipe Factory Shares Knowledge 1

2018/07/13

Guangxi Nanning Spiral Pipe Factory Shares Knowledge 1

Types of spiral welded pipes: Spiral welded pipes generally have higher strength than straight-seam welded pipes. They can produce larger-diameter pipes from narrower billets and can also manufacture pipes of different diameters using billets of the same width. However, compared with straight-seam pipes of the same length, spiral welded pipes have a weld seam that is 30% to 100% longer, and their production speed is lower. Consequently, smaller-diameter welded pipes are typically manufactured using the straight-seam process, while larger-diameter pipes predominantly employ the spiral-welded method.

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Guangxi Nanning Spiral Pipe Factory Shares Knowledge 1

2018/07/13

Guangxi Nanning Spiral Pipe Factory Shares Knowledge 1

Types of spiral welded pipes: Spiral welded pipes generally have higher strength than straight-seam welded pipes. They can produce larger-diameter pipes from narrower billets and can also manufacture pipes of different diameters using billets of the same width. However, compared with straight-seam pipes of the same length, spiral welded pipes have a weld seam that is 30% to 100% longer, and their production speed is lower. Consequently, smaller-diameter welded pipes are typically manufactured using the straight-seam process, while larger-diameter pipes predominantly employ the spiral-welded method.

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