In the field of civil and industrial engineering, SGP steel pipe is one of the most widely used materials due to its versatility and reliability in low-pressure fluid conveyance. At Sunjin Metals Vina (SJM Vina), we provide a comprehensive range of SGP steel pipes imported directly from Japan, South Korea, and other reputable markets, ensuring superior quality for every project.
Understanding SGP Steel Pipe
SGP (Steel Gas Pipe) refers to ordinary carbon steel pipes manufactured in accordance with the Japanese Industrial Standard JIS G3452. These are typically Electric Resistance Welded (ERW) pipes designed specifically for piping systems. SGP pipes are commonly available in two finishes: "Black" (natural finish) and "Galvanized" (zinc-coated) to provide enhanced corrosion resistance.
This pipe grade is primarily utilized for transporting water, steam, oil, and other non-corrosive liquids or gases under low-pressure conditions.
SGP Pipe Dimensions and Specifications
SGP pipes offer a diverse range of sizes to accommodate various project scales:
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Outer Diameter: Ranges from 10.5 mm (approx. 1/8 inch) to 500 mm. For large-scale industrial plants, diameters exceeding 500 mm are also available.
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Wall Thickness Categories: Classified into three main groups based on operational pressure:
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Thin-wall (2mm - 5mm): Suitable for low-pressure gas transportation.
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Standard-wall (6mm - 12mm): Designed for medium-pressure fluid transport.
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Thick-wall (14mm - 70mm): Engineered for specialized or high-pressure applications.
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Length: Standard lengths range from 6m to 12m, with custom cutting services available to meet specific technical requirements.
Chemical Composition and Mechanical Properties
The durability of SGP pipes is governed by a strictly controlled chemical balance as per the JIS G3452 standard:
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Carbon Content: Typically maintained below 0.25%, striking a perfect balance between tensile strength and ductility.
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Manganese: Ranging from 0.29% to 1.06%, which enhances the steel's toughness and structural strength.
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Impurities: Both Phosphorus and Sulfur are kept below 0.040%, ensuring long-term material stability and excellent workability.
Mechanically, SGP pipes must pass rigorous criteria:
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Tensile Strength: Minimum of 290 MPa.
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Elongation: Minimum of 30%.
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Crushing & Bending Performance: The pipe must withstand a 90-degree bend and a flattening test (where the plate spacing is 2/3 of the outer diameter) without developing any cracks or fractures.
Practical Applications of SGP Steel Pipe
JIS G3452 SGP pipes are specifically engineered for environments with a working pressure of ≤ 1MPa and temperatures ranging from -15°C to 350°C. Typical applications include:
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Plumbing and Drainage: Domestic water supply and wastewater systems in high-rise buildings.
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Firefighting Systems: Reliable piping for fire sprinkler and hydrant systems.
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Gas and Steam Lines: Transmission of low-pressure gas and steam in manufacturing facilities.
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Mechanical & Structural: Used as electrical conduits, scaffolding, or in light structural steel frames.
Why Choose SGP Pipes from Sunjin Metals Vina?
Sunjin Metals Vina (SJM Vina) is a premier supplier of industrial steel materials. We specialize in SGP pipes, flanges, and fittings imported from top-tier manufacturers in Japan and South Korea. All our products are fully compliant with JIS G3452 standards and come with complete CO/CQ certification to support contractors and developers.
For technical consultation or to receive a competitive quote, please contact us:
Sunjin Metals Vina (SJM Vina)
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Hotline: +84 33 4233 127
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Email: sjmvina@sunjinmetal.com
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Website: www.sjmvina.com.vn
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