| Customization: | Available |
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| After-sales Service: | 24 Hours Service |
| Warranty: | 6 Month |
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Category
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Details
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Standards
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- ASTM A312 / A213: For seamless and welded pipes in high - temperature service - ASME SA312 / SA213: Equivalent to ASTM standards for pressure vessel and boiler applications - EN 10216 - 5: European standard for seamless steel tubes for pressure purposes - EN 10217 - 7: European standard for welded steel tubes for pressure applications - JIS G3463: Japanese standard for stainless steel tubes - UNS N08904, EN 1.4539: Material grade designations
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Pipe Types
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- Seamless Pipes: Manufactured via extrusion or cold - drawing, providing uniform wall thickness and enhanced strength, ideal for high - pressure and high - stress applications. - Welded Pipes: Produced by welding a flat strip into a tube shape, more cost - effective for low - to - medium - pressure applications and large - diameter requirements.
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Surface Finish
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- Mill Finish: Natural surface after manufacturing, with an oxidized layer; suitable for further processing or applications where appearance is not critical. - Pickled Finish: Surface treated with acid to remove scale and oxidation, resulting in a clean, matte appearance; improves corrosion resistance. - Polished Finish: Smooth, reflective surface achieved through mechanical or electrolytic polishing; used for decorative or hygiene - sensitive applications (e.g., food industry). - Passivated Finish: Chemical treatment to form a protective chromium oxide layer, enhancing corrosion resistance.
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Dimensional Tolerances
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- Outer Diameter: Typically ranging from 6 mm to 610 mm (0.25" - 24"); tolerance ±0.5% (ASTM A312). - Wall Thickness: 0.5 mm - 50 mm; tolerance ±10% (ASTM A312). - Length: Standard lengths of 3 m, 6 m, 12 m; custom lengths available with specified tolerances.
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Inspection and Testing
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- Visual Inspection: Checks for surface defects, dimensional accuracy, and overall quality. - Dimensional Measurement: Verifies outer diameter, wall thickness, and length using precision instruments. - Hydraulic/Pneumatic Pressure Test: Ensures pressure - bearing capacity; pressure levels based on standards (e.g., ASTM A312). - Non - Destructive Testing (NDT): - Ultrasonic Testing (UT): Detects internal flaws. - Eddy Current Testing (ET): Checks for surface and subsurface defects. - Chemical Analysis: Confirms material composition meets specified standards. - Mechanical Testing: Tensile, yield, and impact tests to assess strength and ductility.
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Certifications
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- ISO 9001: Quality management system certification. - CE: Conformity with European Union safety, health, and environmental protection standards. - PED (Pressure Equipment Directive): For pipes used in pressure equipment applications in the EU. - NACE MR0175: For resistance to sulfide stress cracking in sour gas environments (optional). - ASTM A923: Test method for detecting detrimental intermetallic phases in austenitic stainless steels.
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Packaging
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- Wrapped in waterproof paper or plastic film to prevent moisture - induced corrosion. - Bundled with steel straps or placed in wooden crates for secure transportation. - End caps or plugs may be used to protect the pipe ends from damage and contamination.
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Deep processing:
Steel pipe products can be further processed for easy use by customers.
We can provide deep processing with threads, grooves, galvanizing, painting, bending, welding and so on.
Pre galvanized steel pipe are mainly used in waterworks, petrochemical industry, chemical industry, power industry,
agricultural irrigation, urban construction. For liquid transport: water supply, drainage. For gas transport: gas, water vapor,
liquefied petroleum gas. For structural use: for piling pipe, as a bridge;
Hunan Hengan Weiye Metal Products Co., LTD is subordinate to Hengan Weiye Steel Pipe Co., LTD. After more than 10 years of development, the company has become a leading enterprise in the industry, with more than ten thousand tons of stock, with processing bases in Guangzhou, Tianjin, Hubei and other provinces.
Main business: seamless steel pipe, fine drawing pipe, drill pipe special steel pipe, steel plate, galvanized products, stainless steel series, and production and processing. Under the support and care of friends and Allies from all walks of life, after years of development, the company's performance continues to expand, the annual sales has exceeded 150 million.
At present, it has become a special agent dealer of well-known domestic steel enterprises. Under the situation of fierce market competition, the company has the courage to open up and innovation. At present, the company provides steel projects all over the world.
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