Description

Precision-engineered stainless steel flange designed for severe corrosive, high-temperature, and cryogenic environments. Fully certified to EN 10204 3.1 under the PED 2014/68/EU directive, our flanges guarantee absolute structural integrity and leak-proof performance for global petrochemical and power generation projects.

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1. Industry Applications

• Petrochemical & Chemical Refining: Utilizing highly corrosion-resistant A182 grades for aggressive chemical processing pipelines and heavy-duty reactor vessels.
• Power Generation & High-Pressure Systems: Relying on robust Weld Neck (WN) flanges bored to heavy-wall dimensions (like Sch 160) to handle extreme mechanical stress and high-pressure steam.
• Shipbuilding & Marine Engineering: Supplying JIS B2220 standard flanges specifically tailored for Asian regional shipbuilding and marine mechanical equipment.
• Cryogenic & LNG Facilities: Austenitic stainless steel flanges providing exceptional impact toughness and leak prevention in ultra-low temperature environments.

2. Commercial Terms & Packaging

Strict Packaging Protocols for Machined Surfaces
• Facing Protection: Every flange facing (especially critical RTJ and RF surfaces) is protected with a customized plastic or plywood cover to prevent any scratches or impact damage to the sealing surface during transit.
• Seaworthy Export Crating: Flanges are firmly secured inside fumigated wooden crates or on heavy-duty plywood pallets, wrapped in anti-rust film to withstand humid ocean freight conditions.
• Clear Marking: Each flange is permanently stamped with Size, Class/Rating, Standard, Material Grade, and Heat Number for 100% on-site traceability.
Commercial Details
• Trade Terms: FOB, CFR, CIF, EXW, FCA.
• Payment Terms: T/T (Telegraphic Transfer), Irrevocable L/C at sight.
• Lead Time: 20 – 40 working days based on order volume and custom machining requirements.
• Documentation: EN 10204 3.1 Material Test Certificate supplied with every shipment. Third-Party Inspection (TPI) is welcomed.

3. Frequently Asked Questions (FAQ)

Q: Which flange type is best for extreme high-pressure operations?
A: Weld Neck (WN) flanges offer the highest structural strength and are specifically designed for high-pressure and extreme operational environments. For sealing systems rated Class 600 and above, a Ring Type Joint (RTJ) facing is highly recommended.
Q: What is the difference between Slip-On (SO) and Weld Neck (WN) flanges?
A: Slip-On (SO) flanges are highly cost-effective and easy to install, making them ideal for standard applications. Weld Neck (WN) flanges, however, feature a tapered hub that transfers stress to the pipe, offering superior strength for high-pressure systems.
Q: Can you manufacture large-diameter flanges exceeding NPS 24? A: Yes. We manufacture large-diameter flanges strictly adhering to the ASME B16.47 standard, covering sizes from NPS 26 up to NPS 60. This includes both Series A and Series B specifications.
Q: Do you provide material certifications for European markets? A: Absolutely. Material certification is crucial for pressure equipment. We provide full EN 10204 3.1 certification to ensure compliance with the strict PED 2014/68/EU directive.
Q: Can you match the bore of a Weld Neck flange to a heavy-wall pipe?
A: Yes, precision bore matching is one of our core strengths. When you order Weld Neck flanges to connect with heavy-wall pipes like Sch 160, we custom-machine the inner diameter to ensure a perfectly smooth and turbulence-free transition at the weld point.

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