Power system: fuel oil, lubricating oil, compressed air, boiler feed water, steam and intake and exhaust system. In this kind of power system, the pipeline has high concentration, high working environment temperature, and the operating medium condition is accompanied by high temperature, permeability, high pressure and other characteristics. Combined with the consistent design of the pipeline system, PE pipeline has certain limitations in the power system, and does not focus on the pipeline type. Therefore, metal pipes are commonly used in this part.

Marine systems: fire, bilge, ballast, living, heating, refrigeration, ventilation, air conditioning and telephone systems. This kind of ship system is mainly to ensure the life, safety and management of personnel, among which the ballast pipeline is different from other pipelines to ensure the safety of the hull operation. In addition to the ballast pipeline, the other pipelines are similar to the construction pipeline system. PE pipeline is suitable for more living water pipeline systems, and the fire safety requirements are low. Ballast piping varies according to the needs of Marine buoyancy changes, and is the largest piping system using HDPE piping.

Ballast piping system refers to the ballast water tank and piping system set at the bottom of the hull, by adjusting the amount of water in the tank to adjust the hull waterline, center of gravity and hull weight changes (cargo ship has a greater impact) to ensure the safe navigation of the ship "adjustment" system. The ballast piping system uses different amounts according to the buoyancy regulation requirements of the ship type. In the overall piping system, because of its characteristics of running through the hull, large instantaneous sub-displacement and comprehensive layout, it often accounts for a relatively high number in the entire Marine pipe network.

Characteristics of Marine pipeline application:

1, the pipeline operation frequency is high, the pipeline pressure water and drainage dual use, transport medium seawater, corrosion resistance needs. (reflects the pipeline demand resistance to negative pressure and positive pressure)

2, the pipeline has the possibility of being submerged in seawater, which requires the pipeline to withstand internal pressure and a certain external pressure. (reflects the external pressure of the pipeline demand chamber)

3, the pipeline system is relatively complex for installation and design. (Order operation, installation, front-end design are required)

PE pipe in the Marine field advantages:

Light weight: PE pipes are lighter than traditional metal pipes, which helps to reduce the overall weight of the ship, thus reducing manufacturing costs and maintenance costs. For example, the density of Marine polyethylene pipe material is only one-eighth that of steel, which enables cost savings in both material selection and transportation.

Strong corrosion resistance: PE pipe has excellent corrosion resistance and can effectively resist chemical corrosion and seawater erosion in the ship environment. This characteristic makes PE pipe widely used in the ship's ballast water system, bilge water system and other key parts.

Easy installation: The installation steps of PE pipe are relatively simple, and a variety of connection methods such as hot melt socket, hot melt butt, steel-plastic connection can be used, which is simple to operate and safe and reliable to connect. This feature greatly facilitates the installation of ship system pipelines, shortens the shipbuilding cycle, and reduces installation labor costs and equipment and material investment.

System sealing performance is good: PE pipe has excellent sealing performance, can effectively prevent leakage and detachment, improve the safety and reliability of water supply. This characteristic is particularly important in the fluid delivery system of the ship to ensure the safe delivery of fluids such as fuel oil, lubricating oil and hydraulic oil.

Economic and environmental protection: the price of PE pipe is lower than seamless steel pipe, and the installation productivity can be increased by 10%, the pipeline cost can be reduced by 15%, and the construction cost can be saved by 30%. In addition, the PE pipe material is hygienic and non-toxic, not easy to breed bacteria and mold, and can resist the corrosion of Marine microorganisms and algae, which is a clean and environmentally friendly green product.
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