8 Figure Blind

8 Figure Blind Flange - Industrial Piping Solutions

XI AN LINHUI IMPORT AND EXPORT Co., LTD. specializes in producing 8 Figure Blind flanges that adhere to strict international standards, such as DIN 2527 series, ASNI/ASTM B16.5, B16.36, B16.47A/B, and B2220-2001. Our products range in size from 1/2" to 48" and have pressure ratings from 150LBS to 2500LBS (PN10 to PN400).

Carbon steel, alloy steel, and stainless steel are among the materials we provide, guaranteeing top performance in a variety of industrial applications. Strict quality control is applied to every flange to ensure pressure integrity and dimensional precision for your vital pipe systems.

Key Features & Benefits

Superior Sealing Performance

With its zero-leakage design, our eight-figure blind flanges offer total pipeline closure. Even in situations of high pressure, the precisely machined sealing surface guarantees dependable cutoff.

Large Selection of Materials

To meet your unique corrosion and temperature requirements, select carbon steel (ASTM A105), alloy steel (ASTM A182 F11/F22), or stainless steel grades (304/316/321).

Economical Approach

Costs associated with middlemen are eliminated with factory-direct pricing. Stock availability lowers downtime costs by facilitating prompt delivery for maintenance and emergency repairs.

8 Figure Blind Specification

Standard: ASNI/ASTM B16.5 / 16.36/16.47A/16.47B B2220 – 2001, DIN2527/2636/2637/2638/2566/2576/2633/2635/2642/2653/2655.

Pressure Rate: 150LBS to 2500LBS / PN10 to PN400

Dimension: 1/2" to 48"

Material: Carbon steel, Alloy Steel, Stainless steel.

Sealing type: RF, FF, MFM, TG, RTJ
Pressure rating:
class 150LBS、300LBS、400LBS、600LBS、900LBS、1500LBS、2500LBS

Dimensions:
ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48, API 605, AWWA AND DRAWING

Manufacturing Process

Forging Technology

We use closed-die forging to create dense grain structure. This process eliminates internal voids and enhances mechanical strength compared to casting methods.

Precision Machining

CNC machining centers maintain dimensional accuracy within ±0.5mm. Sealing faces are finished to Ra 3.2μm for optimal gasket contact.

Heat Treatment

Normalizing and tempering processes relieve internal stress. This ensures dimensional stability during welding and service conditions.

Quality Inspection

100% Dimensional Verification

Each 8 Figure Blind flange is measured with a caliper and tested with a gauge. We check face dimensions, flange thickness, and bolt hole spacing against standard tolerances.

Non-Destructive Examinations

Internal flaws are found through ultrasonic testing. Surface fissures are revealed via magnetic particle examination. Upon request, SGS, BV, or TÜV can conduct a third-party inspection.

Pressure Testing

Hydrostatic testing validates pressure rating. Test certificates document compliance with design specifications.

Applications

The Oil and Gas Sector

Refinery process systems, wellhead equipment, and pipeline isolation. NACE MR0175 compliance is available and suitable for sour gas service.

Processing Chemicals

Process pipework, storage tanks, and reactor vessels. Acids, alkalis, and organic solvents are handled by corrosion-resistant grades.

Generation of Power

Cooling water circuits, steam pipes, and boiler systems. Thermal cycling is not a problem for high-temperature alloys.

Desalination plants, offshore platforms, and shipbuilding are examples of marine engineering. Pitting corrosion is avoided by materials that are resistant to seawater.

Export Markets

We have successfully delivered products to over 60 countries:

North America: USA, Canada, Mexico

Europe: Germany, UK, France, Netherlands

Middle East: UAE, Saudi Arabia, Qatar, Kuwait

Asia-Pacific: Japan, South Korea, Singapore, Australia

South America: Brazil, Colombia, Chile

Africa: Nigeria, South Africa, Egypt

Long-term partnerships established with CEFC, PTT, PETRONAS, and PEMEX.

Why Choose Us

Direct Mill Supply

Factory-direct pricing reduces costs by 15-20%. No middlemen ensures quality control from raw material to finished product.

Fast Turnaround

Stock orders ship within 3-7 days. Standard production completed in 15-25 days. Rush orders accommodated with expedited scheduling.

Flexible MOQ

Trial orders from 100 kg supported. Large volume discounts available for project purchases.

Engineering Support

In-house metallurgists assist with material selection. Technical team reviews drawings within 24 hours and provides installation guidance.

Packaging & Shipping

Protective Packaging

Flanges wrapped in anti-rust paper and plastic film. Wooden cases or steel crates for sea freight. Sealing faces protected with plywood covers.

Global Logistics

We arrange door-to-door delivery via sea, air, or express. Insurance coverage available. Export documentation includes commercial invoice, packing list, and certificates.

Inventory Management

200+ tons stock inventory for immediate shipment. Consignment arrangements for large ongoing projects reduce your storage costs.

FAQ

Q: What is the difference between RF and FF facing?

A: Raised Face (RF) has a raised sealing surface, common in high-pressure applications. Flat Face (FF) is flush, used for lower pressures with full-face gaskets.

Q: Can you provide material test certificates?

A: Yes, we provide EN 10204 3.1 or 3.2 certificates with complete chemical composition and mechanical property test results for every heat lot.

Q: Do you accept custom specifications?

A: Absolutely. We manufacture to customer drawings and non-standard dimensions. Our engineering team reviews specifications within 24 hours.

Q: What payment terms do you offer?

A: We accept T/T, L/C at sight, and O/A terms for established customers. 30% deposit with 70% before shipment for new orders.

Q: How do I verify product authenticity?

A: Each flange is marked with heat number, grade, and size. This marking links to full traceability documentation including mill certificates.

Request a Quote

Ready to source reliable 8 Figure Blind flanges for your project? Our team responds to inquiries within 4 hours with detailed quotations.

Contact us today at linhui@lhtitanium.com with your specifications. We'll provide competitive pricing and technical recommendations tailored to your application needs.