High-strength Carbon And Alloy Steel Tubes For Gas Storage
Jis g3429 seamless tubes for high-pressure gas cylinders, offering superior strength and corrosion resistance.
High-strength Carbon And Alloy Steel Tubes For Gas Storage
Jis g3429 seamless tubes for high-pressure gas cylinders, offering superior strength and corrosion resistance. ideal for cng, hydrogen, and industrial gas storage in grades like sth11 to sth31.
JIS G3429 Seamless Tubes are engineered for high-pressure gas cylinders, providing exceptional strength, durability, and corrosion resistance. Conforming to the Japanese Industrial Standard (JIS G3429), these seamless steel tubes are ideal for storing compressed natural gas (CNG), hydrogen, and other industrial gases in applications such as automotive, energy, and industrial sectors. Available in grades like STH11, STH12, STH21, STH22, and STH31, these tubes ensure safety and reliability under extreme pressure conditions.
Manufactured through seamless processes (hot-finished or cold-drawn), JIS G3429 Seamless Tubes are designed with outer diameters ranging from 38 mm to 356 mm and wall thicknesses from 3 mm to 25 mm. Lengths can be customized up to 12 meters to meet specific project needs. The seamless construction eliminates weld imperfections, ensuring uniform strength and resistance to high internal pressures. Heat treatments such as quenching and tempering or normalizing enhance mechanical properties, making these tubes suitable for high-pressure gas cylinder applications.
The chemical composition of JIS G3429 tubes, with controlled carbon, silicon, manganese, phosphorus, sulfur, and alloying elements like chromium and molybdenum (in higher grades), ensures excellent weldability and corrosion resistance. For instance, STH21 and STH22 incorporate chromium and molybdenum for enhanced strength and corrosion resistance, ideal for hydrogen storage. Rigorous testing, including tensile, impact, flattening, and nondestructive tests (ultrasonic or eddy current), ensures compliance with JIS G3429 standards. Surface treatments such as phosphating, galvanizing, or epoxy coatings further improve durability, with plain or threaded ends for easy assembly.
JIS G3429 Seamless Tubes are critical in applications like CNG vehicle cylinders, hydrogen storage for fuel cells, and industrial gas cylinders for oxygen or nitrogen. Compared to JIS G3445 (machine structural tubes) or ASTM A519 (mechanical tubing), JIS G3429 offers superior pressure resistance and safety for gas containment. These tubes are designed to withstand pipeline wear and high-pressure stresses, making them a preferred choice for gas storage systems.
These tubes address challenges such as high-pressure containment, corrosion, and material fatigue in gas cylinder applications. Their robust design, compliance with JIS G3429 standards, and advanced alloy compositions make them a reliable solution for industries seeking durable CNG storage tubes and hydrogen cylinder piping, ensuring safety, efficiency, and longevity in high-pressure environments.
Designed to withstand extreme internal pressures in gas cylinders.
High tensile and yield strength ensure safety under high stress.
Alloyed grades resist corrosion in aggressive gas environments.
Seamless design eliminates weld defects for leak-proof performance.
Rigorous testing ensures compliance with JIS G3429 standards.
Durable materials reduce maintenance and replacement costs.
| Grade | C (% max) | Si (% max) | Mn (% max) | P (% max) | S (% max) | Cr (%) | Mo (%) |
|---|---|---|---|---|---|---|---|
| STH11 | 0.50 | 0.35 | 1.50 | 0.035 | 0.035 | - | - |
| STH12 | 0.20 | 0.35 | 1.00 | 0.035 | 0.035 | - | - |
| STH21 | 0.25 | 0.35 | 0.40-0.90 | 0.030 | 0.030 | 0.80-1.20 | 0.15-0.30 |
| STH22 | 0.33 | 0.35 | 0.40-0.90 | 0.030 | 0.030 | 0.80-1.20 | 0.15-0.30 |
| Grade | Tensile Strength (MPa min) | Yield Strength (MPa min) | Elongation (% min) |
|---|---|---|---|
| STH11 | 365 | 195 | 25 |
| STH12 | 375 | 235 | 25 |
| STH21 | 510 | 355 | 20 |
| STH22 | 610 | 490 | 15 |
| Feature | JIS G3429 | ASTM A519 | EN 10297-1 |
|---|---|---|---|
| Material Type | Carbon/Alloy Steel | Carbon/Alloy Steel | Carbon/Alloy Steel |
| Temperature Range | Ambient to moderate | Ambient to moderate | Ambient to moderate |
| Tensile Strength (MPa) | ≥365 (STH11), ≥610 (STH22) | ≥345 (1010), ≥655 (4130) | ≥580 (34CrMo4) |
| Yield Strength (MPa) | ≥195 (STH11), ≥490 (STH22) | ≥275 (1010), ≥450 (4130) | ≥450 (34CrMo4) |
| Corrosion Resistance | Moderate to high (with coatings) | Moderate (with coatings) | Moderate to high |
| Dimensional Tolerances | OD: ±0.5–1%, WT: ±10% | OD: ±1%, WT: ±10% | OD: ±1%, WT: ±10% |
| Fabrication Options | Limited (cylinder forming) | Bending, flaring, welding | Limited (cylinder forming) |
| Applications | Gas cylinders, CNG, hydrogen | Mechanical tubing, hydraulics | Gas cylinders, pressure vessels |
| Key Advantage | High-pressure gas containment | Wide grade range | High strength for cylinders |
| High-Temperature Suitability | Not suitable | Not suitable | Not suitable |
| NUMBER | GRADE | NUMBER | GRADE | NUMBER | GRADE | NUMBER | GRADE | |
|---|---|---|---|---|---|---|---|---|
| D 3517 | Grade 11 A | STKM 11 A | A513 | MT1010 | G-3445 | STKM11A | – | – |
| A519 | MT1010 | |||||||
| Grade 12A | STKM 12 A | A513 | MT1015 | STKM12A | 980 | CDS-3 | ||
| A519 | MT1015 | |||||||
| Grade 12 B | STKM 12 B | – | – | STKM12B | – | – | ||
| Grade 12C | STKM 12C | A512 | MT1015 | STKM12C | – | – | ||
| A513 | ||||||||
| Grade 13 A | STKM 13 A | A512 | MT 1025 | STKM13A | – | – | ||
| A513 | MTX1025 | |||||||
| A519 | MT 1025 | |||||||
| Grade13B | STKM 13 B | – | – | STKM13B | 980 | CDS-4 | ||
| Grade13 C | STKM 13 C | – | – | STKM13C | – | – | ||
| Grade14 A | STKM 14 A | A513 | MT1030 | STKM14A | 1717 | CDS-103 | ||
| A519 | MT1030 | |||||||
| Grade14 B | STKM 14 B | – | – | STKM14B | – | – | ||
| Grade14 C | STKM 14 C | – | – | STKM14C | – | – | ||
| Grade15 A | STKM 15 A | A513 | MT1033 | STKM15A | 1717 | CDS-105 | ||
| Grade15 C | STKM 15 C | – | – | STKM15C | – | – | ||
| Grade16 A | STKM 16 A | A519 | MT1040 | STKM16A | 980 | CDS-5 | ||
| Grade16 C | STKM 16 C | – | – | STKM16C | – | – | ||
| Grade17 A | STKM 17 A | A519 | MT1050 | STKM17A | 980 | CDS-7 | ||
| 1717 | CDS-107 | |||||||
| Grade17 C | STKM 17 C | – | – | STKM17B | – | – | ||
| Grade18 A | STKM 18 A | A519 | MT1524 | STKM18A | 980 | CDS-9 | ||
| Grade18 B | STKM 18 B | – | – | STKM18B | – | – | ||
| Grade18 C | STKM 18 C | – | – | STKM18C | – | – | ||
| Grade19 A | STKM 19 A | – | – | – | – | – | ||
| Grade19 C | STKM 19 C | – | – | – | – | – | ||
| Grade20 A | STKM 20 A | – | – | – | – | – | ||
Explore JIS G3429 seamless tubes with targeted long-tail keywords, covering specifications, applications, grades, manufacturing, procurement, and dimensions for high-pressure gas cylinders.
Note: JIS G3429 covers seamless steel tubes for high-pressure gas cylinders. For detailed specifications, refer to the JIS G3429 standard or contact a certified supplier.
JIS G3429 Seamless Tubes are critical for high-pressure gas cylinders, ensuring safe storage and transportation of CNG, hydrogen, and industrial gases.
Safe storage for compressed natural gas in automotive applications.
High-pressure storage for hydrogen in clean energy systems.
Stores oxygen, nitrogen, and other gases for industrial use.
Ensures safe transport of high-pressure gases in cylinders.
Supports high-pressure gas storage in renewable energy.
Reliable for oxygen and medical gas storage in healthcare.
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