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DIN30671 standard spiral steel pipe is mainly used for anti-corrosion treatment of buried or underwater steel pipelines, especially suitable for anti-corrosion engineering of transportation pipelines such as oil, natural gas, water supply and heating.
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The anti-corrosion application field of DIN30671 standard spiral steel pipe
DIN30671 standard spiral steel pipe is mainly used for anti-corrosion treatment of buried or underwater steel pipelines, especially suitable for anti-corrosion engineering of transportation pipelines such as oil, natural gas, water supply and heating. This standard requires steel pipes to be coated with three-layer polyethylene (3PE) or polypropylene (3PP) to have corrosion resistance, high pressure resistance, and mechanical damage resistance in harsh environments. In addition, this standard also applies to scenarios such as liquid transportation and building structure support in the chemical industry, and enhances the adhesion of coatings through strict surface treatment processes such as chemical pickling and shot blasting.
Production standards and technical requirements
According to DIN30671 standard, the production of spiral steel pipes requires strict process flow, including raw material pretreatment, welding process control, and coating processing. For example, strip steel needs to be leveled, trimmed, and surface cleaned, and double-sided submerged arc welding technology is used for welding to ensure the quality of the weld seam. The anti-corrosion coating needs to be processed in layers, with the outer layer made of polyethylene or polypropylene material, the middle layer made of adhesive, and the inner layer made of epoxy powder. The thickness of each layer must comply with the standard requirements. The testing process includes ultrasonic testing, hydrostatic testing, and coating adhesion testing, and the product meets the requirements of corrosion resistance and compression resistance.
Market supply and product parameters
Spiral steel pipes that comply with DIN30671 standards are mainly produced by professional manufacturers, such as Shandong Liaocheng Lulian Steel Pipe Co., Ltd., which provides various specifications of products with diameters ranging from 219mm to 3500mm and wall thicknesses ranging from 5mm to 25mm. Price calculation is usually based on material cost, process complexity, and anti-corrosion level, for example, the price of 3PE anti-corrosion steel pipe includes coating processing costs. The product is widely supplied in oil and gas transportation, municipal engineering, and large-scale infrastructure projects, supporting customized production to meet different engineering needs.
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