ANSI/ASMI B16.5 SPECTACLE BLIND FLANGE – ASTM A182 Inconel 600, 718

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Spectacle Blinds are used in separating pipe systems for the connection. It is a steel plate divided into two discs of a certain thickness. Out of these two discs, one disc is of a solid plate and other is a ring whose inner diameter is equal to that of a flange. Spectacle Blinds is required in the systems that regularly need to be separated from other installations. Generally, it is mounted in the “Open” position so that flow through the pipe is possible. If it is placed in the “close” position and if it is rotated, then, the pipe is blanked off and no flow is feasible. The whole idea of a spectacle blind is to ensure that an item of equipment is properly and securely blanked off with no leakage or no flow through a valve during maintenance.

The whole idea of a spectacle blind is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just bypassed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valved off and pressure relieved prior to loosening flange bolts and swinging the blind.

UNS S32750 Spectacle Blind Flanges, PED Approved Spectacle Blind Flanges, Alloy 20 Spectacle Blind Flanges, Inconel 600 Spectacle Blind Flanges, UNS S30400 Spectacle Blind Flanges Manufacturer, Duplex 2205 Spectacle Blind Flanges Manufacturer, ASTM A182 SS 304 Spectacle Blind Flanges, UNS S32760 Spectacle Blind Flanges

Pressure Class 300

Pressure Class 600

Pressure Class 900

Pressure Class 1500

Pressure Class 1500

Pressure Class 2500

Notes:

• Dimensions are in millimeters unless otherwise indicated.
• D = Hole size (where required) should be the same as the flange bolt hole. In practice, these dimensions have been rounded round off upwards.
• D = Hole size (where required) should be the same as the flange bolt hole. In practice, these dimensions have been rounded round off upwards.
• Wt = Thickness of the web (or tie bar) should be 6 mm minimum, or equal to Thickness (t) if less than 6 mm.
• Spectacle Blinds should be made from a plate or forging specification, approved for use by ASME B31.3, of essentially the same chemical composition as the mating flanges and piping involved.
• Spectacle Blinds according to ASME B16.48 may be used for installation between ASME B16.5 flanges
• Depending on a customer specification, some dimensions can be different from what on this page is defined.

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All pipes are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.

Wooden Boxes

Wooden Pallets

Shrink-Wrapped

Carton Boxes

Wooden Boxes

At JF Engineering Products LLP, all fasteners are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report

• Positive Material Identification - PMI Testing
• Chemical Analysis - Spectro Analysis
• Mechanical Testing Such as Tensile, Elongation, Reduction of Area
• Micro Test
• Macro Test
• Hardness Test
• Pitting Resistance Test
• Intergranular Corrosion (IGC) Test
• Flaring Test
• Flattening Test
• Hydrostatic Test
• Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
• Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
• Radiography Test
• Dye Penetrant Test (DP Test)

Delivery time and delivery dates are based on the "type and quantity" of steel ordered. Our sales team will provide a delivery schedule when quoting to you. On rare occasions the delivery schedule may change so please check with our sales department when placing any orders.

Orders will be sent out within 2-3 business days, and may take up to 5-10 business days in transit. If fastener is out of stock, orders may take up to 2-4 weeks to ship. JF Engineering Products LLP will notify buyer if this situation occurs.

JF Engineering Products LLP take immensure pleasure in introducing itself as one of the leading Manufacturer & Exporter of high quality fasteners to meet the customer ultimate requirements in the fields of:

Construction

Bridges

Petrochemical Industry

Ship Building

Engineering

General Structural Purposes

Offshore and Onshore Services

Power Generation Industries

Food Processing Industries

Oil & Gas Industries

Sugar Industries