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Forged Carbon Steel Pipeline Terminal Sealing WPB Blind Flanges custom

Forged Carbon Steel Pipeline Terminal Sealing WPB Blind Flanges Manufacturers

-- Steady & Reliable Manufacturer --

Heavy-Duty Pipeline Sealing Solutions

Blind Flanges (BL) are essential components used to permanently or temporarily seal the ends of piping systems, valves, and pressure vessel openings. Our Forged Carbon Steel WPB Blind Flanges are manufactured using high-pressure forging techniques to ensure a solid, void-free internal structure that can withstand maximum system pressure. Unlike other flanges, a blind flange must endure the highest mechanical stress due to internal pressure and bolt loading at the center of the disc. As a specialized manufacturer, we ensure our WPB (Wrought Pipe Butt-weld) material offers the toughness required for heavy-duty sealing. These flanges are critical for isolation during pipeline maintenance, hydro-testing, or as permanent closures for future expansion points in industrial networks.

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WPB Blind Flange Specifications

CategorySpecification Detail
Material GradeASTM A105, A234 WPB, A350 LF2
StandardsASME B16.5, DIN 2527, JIS B2220
Pressure RatingsClass 150 to Class 2500
Size Range1/2" to 72" (Large Diameter Specialist)
Face FinishSmooth Finish, Concentric Serrated, Stock Finish
Protective CoatingBlack Painting, Anti-rust Oil, Galvanized

Terminal Sealing Applications

WPB blind flanges are the primary choice for terminal sealing in cross-country oil and gas pipelines and city gate gas stations. They are widely used during hydrostatic testing to isolate sections of a newly constructed pipeline. In the chemical and power industries, they serve as manway covers for pressure vessels and heat exchangers, allowing for periodic internal inspections. They are also common in municipal water treatment plants for sealing off redundant lines or future connection headers. Because of their robust forged construction, they are used in high-pressure steam headers and boiler blowdown lines. Any piping system that requires a reliable, removable closure for cleaning, inspection, or system expansion will utilize these high-strength carbon steel blind flanges.

Security & Sealing Advantages

  • Maximum Pressure Containment: Forged solid steel construction provides the highest safety factor for terminal sealing.
  • Easy Access for Maintenance: Bolted connection allows for quick removal during system cleaning or inspection.
  • Solid Grain Structure: Forging eliminates internal defects, ensuring the flange does not leak or crack under high stress.
  • Corrosion Protection: Available with high-quality black coatings or galvanization to withstand harsh outdoor environments.

Logistics & Export Services

We support payments via T/T and Irrevocable L/C at sight. To ensure the serrated sealing face remains pristine, we apply a thick layer of anti-rust oil and use plastic or wooden face protectors. Our blind flanges are typically packed in seaworthy plywood cases or on heavy-duty pallets with waterproof wrapping. For large-diameter flanges (above 24"), we provide specialized cradles to prevent movement during sea transit. We ship globally from Shanghai and Ningbo ports. Documentation includes 3.1 Mill Test Certificates, NDT (Non-Destructive Testing) reports, and dimensional verification sheets. Our export team ensures that all products are marked with heat numbers for 100% material traceability from the forge to the site.

  • Q: Can a blind flange be used to reduce pipe size?
  • A: No, a blind flange is a solid disc meant for sealing. To reduce pipe size, you would need a reducing flange or a reducer.
  • Q: What is the difference between a forged and a plate blind flange?
  • A: Forged blind flanges have a superior grain structure and higher density, making them much more reliable for high-pressure and high-temperature applications than those cut from plate.
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Jiangyin Gaoxin Pipe Fittings Co., Ltd.
About Us
JIANGYIN GAOXIN PIPE FITTINGS CO.,LTD.
Our company is a professional manufacturer of pressure piping components. As Forged Carbon Steel Pipeline Terminal Sealing WPB Blind Flanges Manufacturers，Our product range covers butt-weld, socket-weld, and threaded pipe fittings, including flanges and customized non-standard parts. These products are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, papermaking, metallurgy, pharmaceuticals, and food processing. We manufacture according to standards such as ASME, EN,JIS,DIN,ANSI,GOST, MSS, GB/T,HG, DL, SH, SY,and have a complete range of inspection equipment, a strict quality control system, and various certifications（PED,AD2000,EAC, ABS,BV, DNV,NORSOK M650, ISO9001,ISO14001,ISO45001,etc.）, making us a leader in the industry.

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