What are the technical requirements for carbon steel pipes for ships?

What are the technical requirements for carbon steel pipe for ships?

Seamless carbon steel pipes for ships refer to seamless pipes used in ship construction and repair. Its main feature is that it is made of carbon steel, which has high strength and corrosion resistance. GB5312-85 is a standard promulgated by the China Standardization Organization, which stipulates the technical requirements and test methods for carbon steel seamless pipes for ships.

Skill requirements:

The technical requirements for carbon steel seamless pipes for ships mainly include the following aspects:

1. Material requirements: The material requirements for seamless carbon steel pipes are No. 20, No. 25, and No. 30 steel. Among them, No. 20 steel has better corrosion resistance and is suitable for ships with harsh operating environments.
2. Manufacturing method: Carbon steel seamless steel pipes for ships use cold-drawn or hot-rolled seamless manufacturing processes. After the steel pipe is made, it needs to undergo surface treatment such as pickling and painting.
3. Physical properties: The physical properties of seamless carbon steel pipes for ships must meet the requirements specified in the standard, including tensile strength, yield strength, elongation and other indicators.
4. Chemical composition: The chemical composition of seamless carbon steel pipes for ships must meet standard requirements, and the carbon content should be between 0.17% and 0.24%.

experimental method:

The test methods for seamless carbon steel pipes for ships mainly include the following aspects:

1. Appearance inspection: Check whether there are cracks, defects, oxide scale, etc. on the surface of the steel pipe.
2. Chemical composition analysis: Use chemical analysis methods to detect whether the chemical composition of the steel pipe meets the standard requirements.
3. Mechanical property test: including tensile test, compression test, bending test, etc., to detect whether the physical properties of the steel pipe meet the standard requirements.

Seamless carbon steel pipes for ships are indispensable materials in the process of ship construction and maintenance. Strict control of its quality and technical requirements is crucial for the safe operation of ships.