Marine grade aluminum alloy round pipes(also called as tubes) are high-performance pipes designed for ships and marine engineering, with the comprehensive advantages of light weight, corrosion resistance and high strength.

Specifications of marine grade aluminum alloy round pipe:

The specifications of marine grade aluminum alloy round tubes are mainly composed of alloy models, size ranges and performance standards:

1. Alloy model:

Common grades include 5083, 6061, 6082, 5052, etc. Among them, 5083-H116 (containing 4.5% magnesium) is known for its excellent seawater corrosion resistance and is suitable for hull structures; 6061-T6 (containing magnesium silicon alloy) has higher strength after heat treatment (tensile strength ≥ 290MPa) and is often used in mechanical parts.

2. Size range:

- Diameter: The conventional diameter is 30-200mm, and it can be customized to 548mm for special needs.

- Wall thickness: 0.5-5mm, some thick-walled aluminum round tubes can reach 20mm to meet different pressure and strength requirements.

- Length: The standard length is usually 8 meters, and some aluminum round pipes manufacturers can provide customized lengths.

3. Implementation standards:

Products must comply with GB/T 26006-2010 "Marine aluminum alloy extruded tubes, rods, and profiles", covering mechanical properties (such as tensile strength, elongation), dimensional accuracy, and non-destructive testing. Some marine grade aluminum round pipe manufacturers like Haomei Aluminum have passed ABS, DNV, CCS and other classification society certifications to ensure international compatibility.

Core advantages of marine grade aluminum alloy round pipes:

1. Balance between light weight and high strength:

The density of aluminum alloy is only 1/3 of that of steel, which significantly reduces the weight of the hull (such as the use of 5083 aluminum can reduce the weight of the ship by 3-5 tons), improves fuel efficiency and load capacity. At the same time, models such as 6061-T6 can achieve strength equivalent to that of low-carbon steel (yield strength ≥ 240MPa) through heat treatment, meeting the structural load-bearing requirements.

2. Excellent corrosion resistance:

The 5083 aluminum alloy contains a high magnesium component and performs well in salt spray environments. It has outstanding resistance to exfoliation corrosion and intergranular corrosion, which can reduce maintenance costs and extend service life.

3. Excellent processing performance:

- Weldability: Both 5083 and 6061 aluminum can be reliably connected through arc welding, spot welding and other processes, and the performance of the welding area is stable, which is suitable for complex structure manufacturing.

- Formability: The extrusion process can produce seamless round tubes with high surface accuracy (wall thickness deviation ≤ 0.6mm), and can be processed into special shapes such as arcs and bamboo joints through stretch bending, tube deflation and other technologies.

Typical application scenarios of marine grade aluminum alloy round pipes:

1. Hull structural parts:

- Superstructure: 6061-T6 aluminum round tubes are used for masts, gangways, etc., taking into account both strength and wind load resistance.

2. Machinery and piping systems:

- Hydraulic and cooling pipes: Aluminum alloy round pipes (such as 5052-O) are used in ship hydraulic systems and seawater cooling pipes due to their corrosion resistance and smooth inner wall, reducing scaling and pressure loss.

- Ventilation and air conditioning systems: Thin-walled aluminum round tubes (such as 6063-T5) are light and easy to install, suitable for cabin ventilation ducts.

3. Auxiliary facilities and components:

- Guardrails and handrails: 6063-T6 aluminum round pipes are anodized, which are both beautiful and weather-resistant, and are used for deck guardrails and stair handrails.

- Container frames: Container frames made of 5083 aluminum alloy round tubes are 40% lighter than steel and corrosion-resistant, suitable for ocean transportation.

Marine grade aluminum alloy round pipes have become a key material for modern shipbuilding with their triple advantages of light weight, corrosion resistance and high strength. From conventional merchant ships to high-end ships, from structural parts to precision pipes, its application scenarios are constantly expanding. With the advancement of manufacturing processes (such as large-size seamless pipe extrusion technology) and the improvement of environmental protection requirements, the penetration rate of aluminum alloy round tubes in the shipbuilding field will continue to increase, driving the industry towards efficiency and green development.