Yanshan Shisheng Tube-material Antiseptic Co., Ltd. primarily produces coated composite pipes, large-diameter antiseptic steel pipes, steel-on-steel pipes, steam insulation pipes, 3PE antiseptic steel pipes, TPEP antiseptic steel pipes, FBE pipes, 3PP antiseptic steel pipes, and insulated pipes. 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 used for coating operations on steel pipelines transporting mixed media including oil, gas, water, and coal slurry. The company is a specialized prefabrication contractor integrating antiseptic treatment, thermal insulation, and pipeline installation into one. It 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 it highly competitive in both domestic and international markets. We sincerely welcome customers from all over the world to cooperate with Yanshan Shisheng Tube-material Antiseptic Co., Ltd.

Advantages and Disadvantages of Internal Shot Blasting Machines for Steel Pipes:
The shot blasting machine is equipped with an upward-facing blasting arrangement. Since steel pipes of different diameters are conveyed on the roller conveyor at roughly the same height at their bottom surfaces, the shot blasting machine directs projectiles from bottom to top, ensuring that the distance between the projectiles and the surface of the steel pipe remains essentially constant. Consequently, the impact velocity of the steel shots upon reaching the workpiece surface is uniform across all pipe diameters, guaranteeing consistent surface preparation effects regardless of pipe diameter. This provides uniform conditions for subsequent coating applications.
The workpieces continuously pass through the inlet and outlet of the shot blasting machine. To prevent shot media from flying out when cleaning steel pipes with significantly varying diameters, this machine is equipped with multi-layer, replaceable sealing brushes that ensure complete containment of the shot media.
A novel, high-efficiency, multi-functional shot blasting machine with a centrifugal cantilever design is selected. It features a large shot-blasting capacity, high power, quick blade replacement, and the capability of complete unit replacement for convenient maintenance.
The use of a full-curtain-type BE-type shot-blast grit separator significantly enhances the separation capacity, separation efficiency, and shot blasting quality, while reducing wear on the blast wheel.
Equipped with PLC-based electrical control, a pneumatic system for loading and unloading materials via air valves and cylinders, a controllable gate for regulating the flow of shot media, and fault detection capabilities for shot-media conveyance, this machine achieves fully automatic operation. As a result, it features high productivity, excellent reliability, and a leading level of automation.
Using pulse, vibratory, or reverse-air cleaning methods can easily regenerate the filter cartridges and deliver excellent dust-cleaning performance. Filter cartridge filtration technology represents a generational shift from baghouse dust collection and is the filtration technology of the 21st century.

The steel pipe must undergo shot blasting to remove rust from its inner wall before it can be coated with plastic. Plastic-coated steel pipes are a newly developed type of pipeline material in China. They feature a composite structure consisting of an inner and outer plastic coating, with a reinforced welded steel pipe or seamless pressure-resistant steel pipe serving as the intermediate layer. 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, these pipes have become environmentally friendly products promoted for nationwide use. Plastic-coated composite steel pipes are made by fusing a layer of organic materials—such as polyethylene (PE) resin, ethylene-acrylic acid copolymer (EAA), epoxy (EP) powder, non-toxic polypropylene (PP), or non-toxic polyvinyl chloride (PVC)—onto the inner wall of the steel pipe, with a thickness ranging from 0.5 to 1.0 mm. These pipes not only retain the high strength, ease of connection, and resistance to water flow impacts characteristic of steel pipes but also address 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. The designed service life of these pipes can reach up to 50 years. The main limitation is that they cannot 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.