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China, Chinese JIS G3454 Welded Steel Pipe for General/Ordinary Industrial Piping1 Industrial Products Supplier Manufacturer Details, price list catalog:
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EZ Steel Industrial Co., Ltd.
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Product Description Product DescriptionJIS G3454 Welded Steel PipeCategoryDetailsStandardJIS G3454 (Japanese Industrial Standard)Material TypeCarbon Steel / Carbon-Molybdenum Steel (Grades: STPG370, STPG410, STPG480, STMGT370, STMGT410)ManufacturingWelded (ERW/SAW), post-weld heat-treated (normalized or stress-relieved)Key Features- High-temperature resistance (up to 350°C)- Moderate pressure capability- Cost-effective ERW/SAW production- Good weldability and ductilityApplications- Steam pipelines (power plants)- Boiler systems- Chemical process piping- Structural supports in high-temperature environmentsAdvantages- Economical for medium-pressure systems- Enhanced creep resistance (Mo-added grades)- Compatible with thermal cycling- Compliant with regional Asian standardsLimitations- Limited to moderate pressure (<30 MPa)- Requires coatings for corrosion protection- Less precise tolerances vs. precision tubing standardsDimensional Range- OD: 21.7-508 mm- Wall Thickness: 2.0-16 mm- Length: 5-12 m (customizable)Surface FinishMill finish (bare) or coated (galvanized/painted)Int'l Equivalents- KS D3507 (Korea)- GB/T 8163 (China)- ASTM A53 (partial overlap in applications) 1. OverviewJIS G3454 is a Japanese Industrial Standard for carbon and carbon-molybdenum steel welded pipes designed for high-temperature and high-pressure service. These pipes are widely used in industrial piping systems, boilers, heat exchangers, and structural applications. The standard emphasizes durability, weldability, and performance under thermal stress, making it a key choice for energy, construction, and manufacturing sectors in Japan and internationally. 2. Key FeaturesMaterial Grades:STPG370, STPG410, STPG480: Carbon steel grades with varying tensile strength (e.g., STPG410: min. tensile strength 410 MPa).Optional STMGT370, STMGT410: Molybdenum-added grades for enhanced high-temperature strength.Manufacturing Process:Electric Resistance Welding (ERW): Cost-effective for general-purpose applications.Submerged Arc Welding (SAW): For thicker walls or large diameters requiring higher structural integrity.Post-weld heat treatment (normalizing or stress relieving) to improve mechanical properties.Dimensional Specifications:Outer Diameter (OD): 21.7-508 mm (0.85-20 inches).Wall Thickness: 2.0-16 mm (0.08-0.63 inches).Length: Typically 5-12 meters (random or fixed lengths).Mechanical Properties:Yield Strength: 215-275 MPa (varies by grade).Tensile Strength: 370-480 MPa (dependent on grade).Elongation: 25-30% (ensures ductility for bending and forming).Temperature Resistance:Suitable for service temperatures up to 350°C (660°F) for carbon steel grades.Molybdenum-added grades (STMGT) extend performance in high-temperature environments.Surface Treatment:Bare (mill finish) or coated (e.g., black paint, galvanizing) for corrosion protection. 3. ApplicationsIndustrial Piping Systems:Steam lines, hot water pipelines, and thermal oil systems in power plants.Process piping in chemical and petrochemical plants.Boiler and Heat Exchanger Tubes:Used in low-to-medium pressure boilers and heat recovery systems.Structural Use:Supports, frames, and machinery parts requiring high strength-to-weight ratios.Infrastructure:Water supply, HVAC, and firefighting pipelines in commercial buildings. 4. Advantages Over AlternativesCost Efficiency: ERW production reduces costs compared to seamless pipes.High-Temperature Performance: Molybdenum grades resist creep and oxidation.Weldability: Compatible with standard welding techniques (e.g., TIG, MIG).Compliance: Meets JIS, KS (Korean), and GB (Chinese) standards for regional projects. 5. LimitationsPressure Limits: Not suitable for ultra-high-pressure systems (e.g., >30 MPa).Corrosion Resistance: Requires coatings or galvanizing for corrosive environments (e.g., marine applications).Dimensional Tolerances: Less precise than precision tubing standards (e.g., EN 10305). 6. Standards & CertificationsJIS G3454: Specifies chemical composition, mechanical properties, and testing methods.Complementary Standards:JIS G3452 (carbon steel pipes for ordinary piping).JIS G3460 (large-diameter welded pipes for structural use).Certifications: ISO 9001, PED (Pressure Equipment Directive) for European markets. 7. Market PositioningJIS G3454 welded pipes are favored in industries prioritizing cost-effective, high-temperature piping solutions, including:Energy: Thermal power plants and geothermal systems.Construction: Industrial complexes and commercial HVAC systems.Manufacturing: Automotive exhaust systems and machinery components. Detailed Photos
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