Seamless carbon steel pipes for ships are made of high-strength carbon steel, which provides excellent corrosion resistance. The GB5312-85 standard, promulgated by the China Standardization Organization, outlines the technical requirements and test methods for these pipes used in ship construction and maintenance.
Skills requirement:
The technical requirements for carbon steel seamless pipes used in 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 operating in harsh environments.
2. Manufacturing method: Seamless carbon steel pipes for ship use are manufactured using either cold-drawn or hot-rolled processes. Once produced, the pipes undergo surface treatments such as pickling and painting.
3.Physical properties: Seamless carbon steel pipes for ships must meet the standard requirements for physical properties, including tensile strength, yield strength, elongation, and other indicators.
4.Additionally, the chemical composition must also meet the standard requirements, with a carbon content between 0.17% and 0.24%.
Experiment method:
The test methods for seamless carbon steel pipes used in ships mainly include appearance inspection and chemical composition analysis.
During appearance inspection, the surface of the steel pipe is checked for cracks, defects, and oxide scale. Chemical composition analysis is conducted using chemical methods to ensure that the steel pipe meets the standard requirements.
Mechanical performance tests, such as tensile, compression, and bending tests, are conducted to determine if the steel pipe meets the required physical properties.
Post time: Nov-27-2023