JIS G3429 Seamless Steel Tubes for High Pressure Gas Cylinders
- Grade: STH11, STH12, STH21, STH22, STH31
- OD: 38 -720mm
- WT: 2.6 -60mm
JIS G3429 Seamless Steel Tubes for High Pressure Gas Cylinders
Our JIS G3429 seamless steel tubes are specifically designed and manufactured to meet the stringent requirements of the Japanese Industrial Standard for high-pressure gas cylinders. Made from high-strength, high-quality steel, these tubes are crafted with precision to provide exceptional strength, durability, and corrosion resistance. The seamless construction ensures that there are no welding seams to compromise the integrity of the tube, making them ideal for use in high-pressure applications where safety and reliability are paramount. With their ability to withstand extreme pressure and temperature fluctuations, JIS G3429 seamless steel tubes are perfect for use in a wide range of industries, including gas production, transportation, and storage, as well as medical and industrial applications where high-pressure gas cylinders are required.
Chemical Composition of JIS G3429 Seamless Steel Tubes for High Pressure Gas Cylinders
| Grade | C % | Si % | Mn % | P, S % | Ni % | Mo % | Cr % |
| STH 11 | ≤0.50 | 0.10 – 0.35 | ≤1.80 | ≤0.035 | — | — | — |
| STH 12 | 0.30 – 0.41 | 0.10 – 0.35 | 1.35 – 1.70 | ≤0.030 | — | — | — |
| STH 21 | 0.25 – 0.35 | 0.15 – 0.35 | 0.40 – 0.90 | ≤0.030 | ≤0.25 | 0.15 – 0.30 | 0.80 – 1.20 |
| STH 22 | 0.33 – 0.38 | 0.15 – 0.35 | 0.40 – 0.90 | ≤0.030 | ≤0.25 | 0.15 – 0.30 | 0.80 – 1.20 |
| STH 31 | 0.35 – 0.40 | 0.10 – 0.50 | 1.20 – 1.50 | ≤0.030 | 0.50 – 1.00 | 0.30 – 0.60 | 0.15 – 0.25 |
Specifications
| Standard | JIS G3429 Seamless Steel Tubes for High Pressure Gas Cylinders |
| Steel Grade/Material | STH11, STH12, STH21, STH22, STH31 |
| Outer Diameter(OD) | 38mm-720mm |
| Wall Thickness(WT) | 2.6mm-60mm |
| Length | 5.8-16m or OEM |
| Packing | Plain Ends, Bundled or Loosely Packed |
| Surface Treatment | Bare |
| Section Shape | Round |
| Technique | Seamless hot rolled/Cold-drawn/thermal-expanded |
| Place of Origin | Made in China |
| MOQ | 25 ton/size |
| Transportation | Land transportation by truck or train, sea transportation by container ship or bulk ship. |
Applications of JIS G3429 Seamless Steel Tubes for High Pressure Gas Cylinders
Industrial Gas Storage: Used for storing and transporting industrial gases such as oxygen, nitrogen, hydrogen, and argon. These gases are often used in manufacturing processes, welding, cutting, and various chemical processes.
Medical Gas Cylinders: Employed in the medical field for oxygen therapy, anesthesia, and other medical gases required in hospitals, clinics, and emergency services.
Compressed Natural Gas (CNG) Storage: Utilized in the automotive industry for CNG cylinders in vehicles. These cylinders store natural gas at high pressures, providing a cleaner alternative to gasoline and diesel fuels.
Fire Extinguishers: Used in the manufacturing of high-pressure fire extinguishers, which require reliable and robust containers to store pressurized fire-suppressing agents.
Breathing Apparatus: Applied in the production of breathing apparatus for firefighters, underwater divers, and rescue workers. These devices require dependable high-pressure cylinders to ensure a continuous supply of breathable air.
Aerospace and Defense: Employed in aerospace and defense sectors for storing and transporting high-pressure gases used in various applications, including propulsion systems, pressurization of fuel tanks, and emergency life support systems.
Hydraulic Accumulators: Used in hydraulic systems as accumulators, which store energy in the form of pressurized gas, providing a reliable energy source for various industrial and mechanical operations.
Testing and Calibration: Utilized in laboratories and testing facilities for calibration and testing of high-pressure equipment, ensuring the accuracy and reliability of instruments used in various industries.
