Seamless Steel Tubes for Ship-Building
Introduction
In the highly demanding marine industry, the integrity and reliability of materials used in ship-building are critical. We are specializes in producing high-quality seamless steel tubes specifically designed for boilers, superheaters, and pressure systems in ships. Our commitment to excellence, compliance with international standards, and a deep understanding of our clients' needs make us a trusted partner for shipbuilders worldwide.
Application
Our seamless steel tubes are engineered to meet the rigorous requirements of ship construction and maintenance. They are ideal for use in:
- Boilers: Ensuring safe and efficient steam generation.
- Superheaters: Enhancing thermal performance and energy efficiency.
- Pressure Systems: Providing durability and reliability under extreme pressure conditions.
Production Standards
We adhere to various international production standards, ensuring that our products meet the highest quality and safety benchmarks. Our seamless steel tubes conform to the following certifications:
- China Classification Society (CCS)
- Det Norske Veritas (DNV)
- Lloyd's Register (LR)
- Germanischer Lloyd (GL)
- American Bureau of Shipping (ABS)
- Bureau Veritas (BV)
- Registro Italiano Navale (RINA)
- Nippon Kaiji Kyokai (NK)
- China National Standard (GB/T5312)
Steel Grades
Our seamless steel tubes are available in several grades, ensuring that we can meet diverse project specifications. The available steel grades include:
Each grade has been tailored to deliver optimal mechanical properties suited for ship-building applications.
Dimensions and Tolerances
We utilize advanced manufacturing processes to produce seamless steel tubes with precise dimensions and tolerances. Our cold-drawn tubes are manufactured with the following specifications:
| Manufacturing Process |
Outside Diameter (OD) |
Wall Thickness (W.T.) |
| Cold Drawn |
>30~50 mm |
≤30 mm |
| |
>50~219 mm |
±10% |
- Tolerances:
- Outside Diameter:
- 30~50 mm: ±0.3 mm
- 50~219 mm: ±0.8 mm
- Wall Thickness:
Mechanical Properties
Our seamless steel tubes exhibit exceptional mechanical strength and ductility, making them suitable for challenging marine environments. The mechanical properties of our steel grades are as follows:
| Standard |
Steel Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
| GB/T5312 |
320 |
≥195 |
320~410 |
≥25 |
| |
360 |
≥215 |
360~480 |
≥24 |
| |
410 |
≥235 |
410~530 |
≥22 |
| |
460 |
≥265 |
460~580 |
≥21 |
| |
490 |
≥285 |
490~610 |
≥21 |
Chemical Composition
To ensure the highest quality and performance of our seamless steel tubes, we maintain strict control over their chemical composition. The following table outlines the chemical elements for each grade:
| Standard |
Grade |
C |
Si |
Mn |
P |
S |
| GB/T5312 |
320 |
≤0.16 |
≤0.35 |
0.40~0.70 |
≤0.035 |
≤0.035 |
| |
360 |
≤0.17 |
≤0.35 |
0.40~0.80 |
≤0.035 |
≤0.035 |
| |
410 |
≤0.21 |
≤0.35 |
0.40~1.20 |
≤0.035 |
≤0.035 |
| |
460 |
≤0.22 |
≤0.35 |
0.80~1.40 |
≤0.035 |
≤0.030 |
| |
490 |
≤0.23 |
≤0.35 |
0.80~1.50 |
≤0.035 |
≤0.030 |
