Yanshan Shisheng Tube-material Antiseptic Co., Ltd. primarily produces coated composite pipes, large-diameter antiseptic steel pipes, steel-on-steel structures, steam insulation pipes, 3PE antiseptic steel pipes, TPEP antiseptic steel pipes, FBE pipes, 3PP antiseptic steel pipes, and insulated pipes. Our coated composite pipes and antiseptic steel pipe products are widely used in industries such as drinking water supply, petroleum, chemical engineering, natural gas, water transmission and distribution, and thermal power. These antiseptic steel pipes are employed in the coating operations for steel pipelines transporting mixed media including oil, gas, water, and coal slurry. We are a specialized prefabrication contractor integrating corrosion resistance, thermal insulation, and pipeline assembly into one. The company has introduced advanced international technologies and boasts remarkable features such as high automation, stable operation, reliable quality, one-step forming, and strong processing capabilities, making our products highly competitive in both domestic and international markets. We sincerely welcome customers from all over the world to collaborate with Yanshan Shisheng Tube-material Antiseptic Co., Ltd.

The equipment for manufacturing anti-corrosion steel pipes includes steel pipe shot blasting and derusting machines, 3PE wrapping equipment, PE pipe black-and-yellow jacket peeling machines, sandblasting derusting equipment, low-pressure polyurethane foaming equipment, foaming platforms, fiberglass winding machines, 2PE coating systems, cement mortar spraying machines, and other complementary testing equipment for corrosion protection and thermal insulation.

The coating thickness is controlled by adjusting the spray rate and the rotation speed of the steel pipe, ensuring it meets the design requirements. Then, based on the curing time specifications provided by the epoxy powder manufacturer, the distance between spraying and cooling is carefully managed to guarantee sufficient curing time, allowing the epoxy powder coating to fully cure. After curing, the large-diameter anti-corrosion steel pipes are directly cooled with water. Once they have been thoroughly inspected and passed all quality checks, they are labeled and moved to the finished-product area.

Plastic-coated steel pipes—both internally and externally coated—are composite steel-plastic pipes made by melting a layer of organic material, such as polyethylene (PE) resin, ethylene-acrylic acid copolymer (EAA), epoxy (EP) powder, non-toxic polypropylene (PP), or non-toxic polyvinyl chloride (PVC), with a thickness ranging from 0.5 to 1.0 mm onto the inner wall of a steel pipe. These pipes not only retain the high strength, easy connection, and resistance to water flow impact characteristic of steel pipes but also overcome the drawbacks of steel pipes, such as susceptibility to corrosion, contamination, and scaling when exposed to water, as well as the low strength and poor fire performance of plastic pipes. Their designed service life can reach up to 50 years. The main limitation is that these pipes must not be bent during installation; when performing hot working or electric welding/cutting operations, the cut surfaces must be coated with a non-toxic, room-temperature curing adhesive provided by the manufacturer to repair any damaged areas. 1. They are suitable for underground and humid environments and can withstand both high and extremely low temperatures. 2. They have strong anti-interference capabilities; when used as cable conduits, plastic-coated steel pipes can effectively shield against external signal interference. 3. They exhibit excellent pressure resistance.

Plastic-coated steel pipe is a newly developed type of pipeline material in China. It features a composite structure with both inner and outer protective plastic coatings, and an intermediate layer made of either reinforced welded steel pipe or seamless pressure-resistant steel pipe. This design overcomes the inherent drawbacks of steel pipes—such as susceptibility to rusting, corrosion, high pollution levels—as well as the weaknesses of plastic pipes, including low strength and easy deformation. By integrating the advantages of both steel and plastic materials, this product qualifies as an environmentally friendly item promoted for nationwide use. The plastic-coated composite steel pipe is manufactured by fusing a layer of organic material—such as polyethylene (PE) resin, ethylene-acrylic acid copolymer (EAA), epoxy (EP) powder, non-toxic polypropylene (PP), or non-toxic polyvinyl chloride (PVC)—with a thickness ranging from 0.5 to 1.0 mm onto the inner wall of the steel pipe, thereby creating a steel-plastic composite pipe. This type of pipe not only retains the high strength, ease of connection, and resistance to water flow impacts characteristic of steel pipes but also addresses the shortcomings of steel pipes, such as their tendency to corrode, pollute, and scale when exposed to water, as well as the low strength and poor fire-resistance performance of plastic pipes. Its designed service life can reach up to 50 years. The main limitation is that the pipe must not be bent during installation. When performing hot working or electric welding cutting operations, the cut surfaces must be coated with a non-toxic, room-temperature curing adhesive provided by the manufacturer. The primary specifications range from DN15 to DN300.

Internal and external plastic-coated composite steel pipes are manufactured through a process that begins with welded steel pipes as the base material. The process involves double pre-treatment—sandblasting and chemical treatment—followed by preheating, internal and external coating, curing, and post-processing. These steel-plastic composite pipes exhibit excellent overall performance, featuring strong corrosion resistance and mechanical strength, as well as good chemical stability and water resistance. They offer benefits such as drag reduction, anti-corrosion, pressure resistance, and antibacterial properties. Generally, these pipes are not restricted by the conveyed medium, and the plastic coating exhibits exceptionally strong adhesion to the steel substrate. The coating material, epoxy resin (EP), is suitable for service environments below 80°C. The steel pipe coating boasts extremely high adhesion, with a hard coating surface that offers excellent impact resistance and superior chemical corrosion resistance.