What factors should be considered when selecting marine air bottles?

The selection of marine air bottles needs to consider multiple factors to ensure that they meet the specific needs and operating environment of the vessel. Here are some main considerations:

1. Work pressure and capacity requirements

Work pressure: Determine the required working pressure of the air cylinder based on the requirements of the ship system. The working pressure of low-pressure air bottles for ships is usually around 1.0MPa or 3.0MPa, but there are also options for high-pressure air bottles, which can have higher working pressures.

Capacity requirement: Determine the required volume of air bottles based on the purpose, scale, and demand of the vessel. The volume range of marine air bottles is wide, ranging from 30L to 5000L, and the appropriate volume should be selected according to specific needs.

2. Installation environment and space requirements

Installation location: Consider the installation position of the air bottle on the ship, including factors such as installation space, layout, and accessibility. The environmental conditions at different installation locations may vary, which also affects the selection of air bottles.

Environmental adaptability: Marine air bottles should have good environmental adaptability, including resistance to salt spray, oil spray, mold and dust. When designing, it is necessary to consider the specific environment of the vessel, such as installation location, ambient temperature, ambient humidity, tilt, and sway.

3. Material and anti-corrosion requirements

Material selection: The material of marine air bottles should have good corrosion resistance and pressure resistance. The cylinder body is usually made of Q245R and other materials, while components such as the intake shut-off valve, liquid accumulation discharge shut-off valve, pressure gauge valve, etc. are made of stainless steel 304 and other materials.

Anti corrosion requirements: The primary rust removal grade of the equipment is Sa2.5, and the secondary rust removal grade is St3. The thickness and external color of the paint film should be determined according to the drawings. At the same time, it is necessary to consider factors such as salt spray, oil spray, mold, and dust that may exist in the location where the equipment is used, and take corresponding anti-corrosion measures.

4. Safety performance and compliance with regulations

Safety valve and pressure gauge: Safety accessories such as safety valve and pressure gauge should be installed on the air bottle to ensure that the air bottle can automatically release pressure in case of overpressure and accurately monitor pressure changes during operation.

Compliance with regulations: Marine air bottles must meet the classification requirements of relevant classification societies and comply with relevant standards and regulations. These standards and specifications specify the requirements for the design, manufacturing, and acceptance of marine air bottles, ensuring their safe and reliable operation.