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Ship conveying pipeline spiral steel pipe is a spiral welded steel pipe designed specifically for the shipbuilding industry. It is made of high-quality steel strip and manufactured through spiral forming and double-sided submerged arc welding processes. It has high strength, corrosion resistance, high pressure resistance, and impact resistance, and is suitable for ship propulsion systems, fuel conveying, ballast water systems, and oil pollution treatment pipelines. It meets the strict requirements of salt spray resistance and vibration resistance in marine environments.
keyword Ship transportation pipeline steel pipe Category Scene photos Related products Get a quoteDefinition and core functions of spiral steel pipes for ship transportation pipelines
Ship conveying pipeline spiral steel pipe is a spiral welded steel pipe designed specifically for the shipbuilding industry. It is made of high-quality steel strip and manufactured through spiral forming and double-sided submerged arc welding processes. It has high strength, corrosion resistance, high pressure resistance, and impact resistance, and is suitable for ship propulsion systems, fuel conveying, ballast water systems, and oil pollution treatment pipelines. It meets the strict requirements of salt spray resistance and vibration resistance in marine environments. Its core function is to improve the safety and service life of ship pipelines by dispersing stress and optimizing anti-corrosion through spiral welds.
Technical characteristics and manufacturing processes
1. Material and structural design
Raw materials: Q345B low-alloy steel or X70/X80 high-grade steel materials are used, and the steel strip is pre treated with leveling and edge cutting to ensure mechanical properties and processing accuracy.
Forming process: Continuous rolling is carried out through a spiral forming machine, and both inner and outer double-sided submerged arc welding (such as automatic double wire welding technology) is used to ensure the strength of the weld seam. The weld seam gap is controlled within 1-3mm.
2. Anti corrosion and pressure resistance performance
Multi layer anti-corrosion technology: For seawater corrosion environment, hot-dip galvanizing or 3PE anti-corrosion process (epoxy powder+adhesive+polyethylene) is adopted, with a salt spray corrosion resistance time of more than 30 years.
Pressure bearing capacity: The wall thickness range is 8-20mm, and the maximum pressure bearing capacity can reach 2.5MPa (such as DN800 with a wall thickness of 10mm). The spiral weld disperses stress, and the impact resistance is 30% higher than that of straight seam pipes.
3. Performance advantages
Lightweight design: By using high-strength materials (such as X80 steel grade), the wall thickness is reduced by 20%, reducing the weight of the ship.
Low flow resistance characteristics: The inner wall is coated with epoxy resin to reduce fluid resistance and improve transportation efficiency.
Application scenarios and typical cases
Ship propulsion system
Used for propeller shaft protection tubes, thick walled spiral steel pipes (wall thickness ≥ 12mm) can withstand high torque and seawater impact.
Fuel delivery pipeline
Oil resistant spiral steel pipe (3PE anti-corrosion) is used for diesel and liquefied natural gas (LNG) transportation, with a pressure tolerance of ≥ 1.6MPa.
Ballast water system
Large diameter spiral steel pipes (such as DN1200) are used to balance the water circulation in the cabin, adapting to frequent pressure changes and salt spray corrosion.
Typical case:
A certain ocean going cargo ship project: X70 steel grade spiral steel pipe is used to lay the fuel delivery pipeline, with a diameter of DN600 and a wall thickness of 8mm. It has been running for 3 years without corrosion or leakage.
Quality Control and Industry Standards
Standard specifications
Material standards: comply with GB/T 9711 (Petroleum and Natural Gas Steel Pipe Standard) and classification society (such as CCS, DNV) specifications.
Anti corrosion standard: Implement SY/T 0413 (3PE anti-corrosion) or ISO 12944 (ship coating standard).
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
E-mail:9905791@qq.com
