Figure 8 Spectacle Blinds

Figure 8 Spectacle Blinds

LINHUI TITANIUM manufactures industrial-grade Figure 8 Spectacle Blinds engineered for pipeline isolation and flow control applications. With 21 years of titanium metal manufacturing experience and two factories operating 30 production lines, we deliver 800 tons annually.

Our spectacle blinds comply with ASNI/ASTM B16.5/16.36/16.47A/16.47B and DIN standards, available in dimensions from 1/2" to 48" with pressure ratings from 150LBS to 2500LBS (PN10 to PN400). Manufactured from carbon steel, alloy steel, and stainless steel, each unit undergoes ISO/SGS/TUV quality inspection before shipment via DHL, FEDEX, air, or sea freight.

Key Features & Benefits

Figure 8 Spectacle Blinds provide dual-function pipeline management through their distinctive two-disc design. The open ring allows flow continuation, while the solid disc creates a complete seal.

You gain maintenance flexibility without removing the entire assembly. Simply rotate between open and closed positions during scheduled shutdowns. This design reduces installation time by 40% compared to traditional blind flanges.

The precision-machined surfaces ensure leak-tight performance across temperature fluctuations and pressure cycles.

Specifications

Chemical Composition

Material composition varies by grade selection. Carbon steel variants contain controlled carbon, manganese, and silicon levels per ASTM A105 standards.

Stainless steel options (304/316L) feature chromium-nickel alloys with enhanced corrosion resistance. Alloy steel grades incorporate molybdenum and vanadium for high-temperature stability.

All materials meet EN 10204 3.1/3.2 traceability requirements with full mill test certificates.

Manufacturing Process

Our production begins with certified raw material inspection and heat number verification. Blanks undergo CNC machining to achieve precise dimensional tolerances.

Forging processes apply controlled pressure to enhance grain structure and mechanical properties. Heat treatment cycles optimize hardness and ductility balance.

Final machining creates smooth sealing surfaces with Ra values below 3.2μm. Each component receives identification stamping before protective coating application.

Quality Inspection

100% dimensional verification using calibrated CMM equipment ensures specification compliance. Visual inspection detects surface irregularities under standardized lighting conditions.

Hardness testing confirms proper heat treatment effectiveness. Ultrasonic examination identifies internal discontinuities exceeding acceptance criteria.

Dye penetrant testing reveals surface-breaking defects. Pressure testing validates seal integrity before packaging. Third-party inspection available through SGS, BV, TÜV upon request.

Applications Of Figure 8 Spectacle Blinds

Chemical processing plants use these blinds for reactor isolation during catalyst changes. Oil refineries install them in distillation column piping for maintenance access.

Pharmaceutical facilities require spectacle blinds for product changeover validation. Power generation systems incorporate them in steam line isolation sequences.

Water treatment plants utilize them for filter bank isolation. Marine applications include ballast system sectioning.

Our Factory

Linhui’s modern factory is a leading hub for Spectacle Blinds products. With cutting-edge equipment and an experienced team, we are committed to providing high-quality, high-performance solutions that meet the stringent requirements of global industries.

Certifications

Our Spectacle Blinds and other products are certified by various standards and inspection bodies, including:

• Manufacturing License of Special Equipment of China
• TUV Nord AD2000-W0 certification
• PED 2014/68/EU certification
• CCS, ABS, DNV, BV, BSI, LLOYD'S, GL certification
• ISO 9001:2015 QMS Certificate, OHSAS 18001:2007 Certificate, ISO 14001:2015 Certificate
• Third-party approvals from DNV, BV, SGS, Moody's, TUV, ABS, LR, GL, PED, RINA, KR, NKK, AIB-VINEOTTE, CEIL, VELOSO, and CCSI.

  

Export Markets

We've supplied Spectacle Blinds to clients across North America, South America, and the Middle East. African markets receive regular shipments for mining operations.

CIS region partners specify our products for petrochemical expansions. Southeast Asian customers order bulk quantities for infrastructure projects. European installations meet PED 2014/68/EU compliance requirements.

Why Choose Us

Direct mill supply eliminates intermediary costs while maintaining quality control. Our 200+ tons stock inventory enables 3-7 day delivery for standard sizes.

Quotation responses arrive within 4 hours of inquiry. Engineering support teams provide material selection guidance in English, Chinese, and Spanish.

Flexible MOQ starts at 100 kg for trial orders. Custom fabrication accommodates unique specifications within 25-40 days. Rush orders receive priority scheduling.

Packaging & Shipping

Individual units receive protective wrapping with moisture-resistant paper. Plywood cases provide impact protection during transit. Steel banding secures packages for sea freight.

Air shipments use reinforced cardboard containers. Export documentation includes commercial invoice, packing list, and material certificates. DHL and FEDEX options available for urgent deliveries.

Container loading follows IMDG guidelines for safe transport.

FAQ

Q: What's the difference between spectacle blinds and standard blind flanges?

A: Spectacle blinds remain attached during operation, allowing rotation between open and closed positions. Standard blinds require complete removal.

Q: Can you provide custom thickness options?

A: Yes, we manufacture non-standard thicknesses based on your pressure calculations and design requirements.

Q: What documentation comes with orders?

A: Each shipment includes material test certificates (MTC), dimensional reports, and compliance declarations per EN 10204 3.1/3.2.

Q: Do you support small quantity orders?

A: Trial orders starting from 100 kg are accepted. Stock items ship within one week.

Request a Quote

Need Figure 8 Spectacle Blinds for your next project? Contact our technical team at linhui@lhtitanium.com with your specifications. We'll respond within 4 hours with competitive pricing and delivery timelines.