Properties of Spectacle Blind Flanges
A spectacle blind flange, also known as a figure-8 blind flange, is a specific type of flange used in piping systems. It is designed to provide a positive shut-off when the line needs to be isolated or blocked off.
Here are some key properties and features of spectacle blind flanges:
- Design: Spectacle blind flanges consist of two metal discs connected by a central section that resembles the shape of a figure-8 or a pair of spectacles. The metal discs can be rotated independently to either block or allow the flow of fluid through the pipeline.
- Dual Functionality: The spectacle blind flange can serve as both a blind flange and a spacer flange. By rotating the discs, it can either block the flow completely (blind function) or allow flow through one side while the other side remains closed (spacer function).
- Positive Isolation: When the spectacle blind flange is in the closed position, it provides a positive seal, effectively isolating the section of the pipeline from the rest of the system. This allows maintenance, repair, or replacement of equipment downstream without shutting down the entire system.
- Durability: Spectacle blind flanges are typically made from durable and corrosion-resistant materials such as stainless steel, carbon steel, or alloy steel. The material choice depends on the specific application and the compatibility with the process fluid.
- Pressure and Temperature Rating: Spectacle blind flanges are designed to withstand high-pressure and high-temperature applications, similar to other flange types. The pressure and temperature ratings of the spectacle blind flanges should match the requirements of the pipeline system.
- Size and Dimensions: Spectacle blind flanges are available in various sizes and dimensions to accommodate different pipe sizes and pressure ratings. The dimensions follow standard specifications such as ANSI B 16.48 Spectacle Blind Flanges.
- Flange Face: The spectacle blind flange face can have different configurations, such as raised face (RF), flat face (FF), or ring joint (RTJ). The flange face type is chosen based on the specific application and the requirements for sealing and gasket installation.
- Gasket and Bolting: Spectacle blind flanges require appropriate gaskets and bolting to ensure a secure and leak-free connection. The choice of gasket material and bolting specifications depends on the operating conditions and the compatibility with the process fluid.
- Alignment and Installation: During installation, the spectacle blind flange discs should be aligned properly to ensure smooth operation and effective sealing. Care should be taken to follow the manufacturer’s guidelines and recommendations for correct installation procedures.
- Standards and Codes: Spectacle blind flanges are designed and manufactured according to various industry standards and codes, such as ASME B16.48 Spectacle Blind Flanges. Compliance with these standards ensures the flanges meet the required quality and safety standards.
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Materials Used In The Construction Of Spectacle Blind Flanges Are Available!
Spectacle Blind Flanges are made up of various materials, but they depend on the environment and stress to which they are subjected.
- Carbon steel
- Alloy Steel
- Titanium
- Nickel-based alloy
Benefits of Spectacle Blind Flanges
Spectacle flanges require no welding for installation
- Spectacle flanges from Hilton forge India, Flange have a wide range of pressure tolerances.
- Spectacle blinds flanges are much more economical than valves.
Application of Spectacle Blind Flanges
Spectacle Blind Flanges are been used in various Industries, a few of them are been mentioned below.
- Power generation
- Petrochemical
- Chemical equipment
- Sea water equipment
- Off-shore Oil Drilling Companies
- Pulp and paper industries and so on.
Standards and Specifications of Spectacle Blind Flanges
Particulars |
Details |
Standards |
ANSI, JIS, DIN, EN1092-1, UNI, BS4504, SABS1123, AS2129, GOST-12820 |
Dimension |
ANSI B 16.48 Spectacle Blind Flanges |
Material |
ASTM A105 Spectacle Blind Flanges, ASME SA105 Spectacle Blind Flanges
ASTM A182 Spectacle Blind Flanges, ASME SA182 Spectacle Blind Flanges ASTM A350 LF1 Spectacle Blind Flanges, LF2 CL1/CL2 Spectacle Blind Flanges, LF3 CL1/CL2 Spectacle Blind Flanges ASTM A694 F42 Spectacle Blind Flanges, F46 Spectacle Blind Flanges, F48 Spectacle Blind Flanges, F50 Spectacle Blind Flanges, F52 Spectacle Blind Flanges, F56 Spectacle Blind Flanges, F60 Spectacle Blind Flanges, F65 Spectacle Blind Flanges, F70 Spectacle Blind Flanges ASTM B564 Spectacle Blind Flanges, ASME SB564 Spectacle Blind Flanges |
Class |
Spectacle Blind Flanges 150#, Spectacle Blind Flanges 300#, Spectacle Blind Flanges 600#, Spectacle Blind Flanges 900#, Spectacle Blind Flanges 1500# & Spectacle Blind Flanges 2500#,Spectacle Blind Flanges |
Size |
1/2” NB TO 24” NB. |
Nickel Alloy |
ASTM / ASME SB 336 UNS 2200 ( NICKEL 200), UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (Inconel 625), UNS 10276 ( Hastelloy C 276), ASTM A182 F304/304L Spectacle Blind Flanges, ASTM A182 F304H Spectacle Blind Flanges, ASTM A182 F304L Spectacle Blind Flanges, ASTM A182 F304 Spectacle Blind Flanges, ASTM A182 309H Spectacle Blind Flanges, ASTM A182 310H Spectacle Blind Flanges, ASTM A182 310 Spectacle Blind Flanges.
ASTM A182 F316/316L Spectacle Blind Flanges, ASTM A182 F316H Spectacle Blind Flanges, ASTM A182 F316L Spectacle Blind Flanges, ASTM A182 F316 Spectacle Blind Flanges. |
Stainless Steel |
ASTM A182 F316/316L Spectacle Blind Flanges, ASTM A182 F316H Spectacle Blind Flanges, ASTM A182 F316L Spectacle Blind Flanges, ASTM A182 F316 Spectacle Blind Flanges, ASTM A182 F316Ti Spectacle Blind Flanges, ASTM A182 F317 Spectacle Blind Flanges, ASTM A182 F317L Spectacle Blind Flanges,
ASTM A182 F321 Spectacle Blind Flanges, ASTM A182 F321H Spectacle Blind Flanges. ASTM A182 F347 Spectacle Blind Flanges, ASTM A182 F347H Spectacle Blind Flanges, ASTM A182 F904L Spectacle Blind Flanges ASTM A182 F44 Spectacle Blind Flanges, ASTM A182 F51 Spectacle Blind Flanges, ASTM A182 F53 Spectacle Blind Flanges, ASTM A182 F55 Spectacle Blind Flanges, ASTM A182 F60 Spectacle Blind Flanges |
Alloy Steel |
ASTM A182 F1, A182 F5, A182 F9, A182 F11, A182 F12, A182 F22, A182 F91 |
The products are put through a number of tests and are then completed by our professionals before being delivered to the customer. Our knowledgeable team is trying to increase the product’s susceptibility, effectiveness, or value to our clients. Our business offers a variety of packaging and shipping options based on the needs of our esteemed clientele. Finally, we packaged the products with industry-standard packaging materials and offered quick delivery to our customers in order to increase the efficiency of the Flanges delivery without causing any damage. We provide our valued customers with exceptional quality and service at fair prices.
Flanges Types:-
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| Bengaluru | Mumbai | Chennai | Hyderabad | Kolkata | Pune |
| New Delhi | Ahmedabad | Jaipur | Surat | Salem | Gandhinagar |
| Bhiwandi | Tiruppur | Sivakasi | Jamnagar | Thiruvananthapuram | Rajahmundry |
| Bhubaneswar | Vijaywada | Firozabad | Bokaro Steel City | Rajkot | Bharuch |
| Panna | Raipur | Cochin | Ludhiana | Panipat | Durgapur |
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| Agra | Bhagalpur | Jamshedpur | Bhilai | Lucknow | Kanpur |
| Thane | Bhopal | Sri City | Bareilly | Hosdurg | Pithampur |
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| Saudi Arabia | Oman | Kuwait |
| Bahrain | Qatar | UAE |
| Nigeria | Mexico | Canada |
| India | Tanzania | Belgium |
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| Singapore | Sri-Lanka | Australia |
| France | Italy | South Korea |
| Netherlands | Russia | Germany |
| Poland | Turkey | Brazil |
| Iran | Europe | United Kingdom |
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