Spectacle Blinds Manufacturer in Mumbai India
Asre Engineering is a reliable Spectacle Blinds manufacturer in Mumbai, India, supplying high-quality pipeline isolation solutions for oil & gas, chemical, petrochemical, and power industries.
Our spectacle blinds are designed for positive line isolation, ensuring complete safety during maintenance, inspection, and shutdown operations. Manufactured using precision machining and high-grade raw materials, Asre Engineering spectacle blinds deliver leak-proof performance, long service life, and compliance with international standards.
In processes where suspended solids and debris are present, accurate flow measurement is often complemented by effective filtration and straining solutions. For upstream protection of the flow
instruments and piping systems, Asre Engineering also recommends the use of industrial strainers and filtration equipment manufactured by our associate division. To explore high-quality Y strainers, basket strainers, and custom industrial strainers, visit our dedicated strainer manufacturing website at asrengineering.com, engineered to support reliable and clog-free process operations across industries.
Why Our Spectacle Blinds Stand Out
Positive Mechanical Isolation – Zero leakage assurance
Heavy-Duty Construction – Suitable for high pressure & temperature
Precision Machined Bores & Faces
Wide Size & Pressure Range
Custom Fabrication as per ANSI / ASME Standards
Clear Identification & Easy Operation
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Working Principle - How Our Spectacle Blinds Work
A spectacle blind consists of two metal discs connected by a web:
One solid plate (blind) blocks flow completely
One open ring (spacer) allows full flow
How It Works:
Pipeline is depressurized
Spectacle blind is rotated
Solid plate or spacer is positioned between flanges
Bolting is tightened to ensure tight sealing
This provides absolute visual confirmation of pipeline open or closed condition.
Industries We Serve
Our spectacle blinds are widely used in:
Oil & Gas Refineries
Petrochemical Plants
Chemical Processing Units
Power Plants
Pharmaceutical Industries
Fertilizer Plants
Offshore & Onshore Pipelines
Technical Specification - Spectacle Blinds
Product Type: Spectacle Blind
Size Range: ½” to 48” (DN15 to DN1200)
Pressure Class: ANSI 150 to ANSI 2500
Standard: ASME B16.48
Material: Carbon Steel, SS 304, SS 316, Duplex Steel
Face Type: Raised Face (RF), Ring Type Joint (RTJ)
Design Temperature: Up to 650°C
Surface Finish: Machined / Anti-corrosion coated
Spectacle Blinds Types We Manufacture
Figure-8 Spectacle Blind
Standard ASME Spectacle Blind
Custom-Fabricated Spectacle Blind
High-Pressure Spectacle Blind
RTJ Type Spectacle Blind
Spectacle Blinds Application
Spectacle blinds are commonly used for:
Positive pipeline isolation
Maintenance & shutdown safety
Valve replacement operations
Hydrotesting & pressure testing
Critical process line isolation
They are preferred where absolute safety and visual confirmation are mandatory.
Spectacle Blinds Diagram
Why Choose Asre Engineering?
Mumbai-Based Manufacturer with Pan-India Supply
ASME B16.48 Compliant Manufacturing
Custom Sizes & Materials Available
Fast Turnaround Time
Trusted by Process Industries
Export-Quality Packaging & Documentation
Spectacle Blind vs Spade & Spacer – Comparison Table
| Feature / Parameter | Spectacle Blind (Figure-8 Blind) | Spade & Spacer Blind |
|---|---|---|
| Construction | Single unit with blind plate + spacer connected | Two separate components (spade & spacer) |
| Visual Indication | Excellent – immediate open/closed status | Good – depends on which plate is installed |
| Ease of Operation | Faster – rotate within flanges | Slower – remove & replace components |
| Space Requirement | Requires side clearance for rotation | Suitable for tight space installations |
| Installation Time | Shorter downtime | Longer downtime |
| Safety Level | Very High – clear visual confirmation | Very High |
| Risk of Misplacement | None – single integrated unit | Possible – separate parts |
| Maintenance Frequency | Low | Low |
| Pressure & Temperature Handling | Excellent for high pressure & temperature | Excellent |
| Standard Compliance | ASME B16.48 | ASME B16.48 |
| Typical Size Range | ½” to 48” | ½” to 48” |
| Cost | Slightly higher (integrated design) | Slightly lower |
| Best Use Case | Frequent isolation operations | Infrequent isolation or limited space |
| Preferred Industries | Oil & Gas, Refineries, Petrochemical | Chemical, Power, Utilities |
| Overall Recommendation | ⭐⭐⭐⭐⭐ Best for operational efficiency | ⭐⭐⭐⭐ Best for compact layouts |
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Frequently Asked Questions (FAQs)
1. What are spectacle blinds used for?
Spectacle blinds are used for positive pipeline isolation, ensuring zero leakage during maintenance or shutdown.
2. What is the difference between spectacle blind and spade & spacer?
A spectacle blind combines blind and spacer in one unit, while spade and spacer are separate components.
3. Which standard applies to spectacle blinds?
Spectacle blinds are manufactured as per ASME B16.48 standard.
4. Which industries use spectacle blinds?
Oil & gas, chemical, petrochemical, power, and pharmaceutical industries widely use spectacle blinds.
5. Who is the best spectacle blinds manufacturer in India?
Asre Engineering, Mumbai, is a reliable manufacturer of high-quality spectacle blinds for industrial pipelines.