Spectacle Blind Flanges

Spectacle Blind Flanges

Spectacle Blind Flanges — ASME B16.5 / B16.47

Savoy Piping Inc. supplies spectacle blinds (figure-8) for positive line isolation. One side is solid (blind); the other is open (spacer). Rotate between positions to open or blank the line without removing the assembly.

Related: Flanges hub · WNRF · SORF · Blind.

What are Spectacle Blind Flanges?

A spectacle blind is a single plate shaped like a figure-8. Installed between flanges with the correct gasket set, it gives a clear visual indication of open vs closed. Thickness is set by pressure class and size (often ASME B16.48).

Selection guidance

Confirm class, size, facing and whether you need a one-piece spectacle or separate paddle blind + spacer. Related: blind flanges · flanges hub.

What to put on the PO

Include material grade / ASTM class, flange type and facing, size and pressure class, bore/schedule, quantity, destination, and documentation (EN 10204 3.1 / 3.2, PMI, NACE, TPI). Email sales@savoypipinginc.com.

Spectacle Blind Flanges range

Spectacle Blind Flange Specification ASTM A182 / ASME SA182 / ASTM A105 / ASME SA105 / ASTM A564 / ASME SA564 / ASTM A350 / ASME SA350 / ASTM A694 / ASME SA694 / ISO 15590-3
Spectacle Blind Flange and Single Blind Manufacturing Process Hot Forging / Rolling / Machining
Spectacle Blind Flange Grades Stainless Steel - ASME SA182 / ASTM A182 F304, ASTM A182 F304L, ASTM A182 F304H, ASTM A182 F309S, ASTM A182 F310S, ASTM A182 F316, ASTM A182 F316, ASTM A182 F316L, ASTM A182 F316Ti, ASTM A182 F317L, ASTM A182 F321, ASTM A182 F347, ASTM A182 F904L, ASTM A182 F44 etc.

Duplex Steel - ASME SA182 / ASTM A182 F51, ASTM A182 F53, ASTM A182 F55, ASTM A182 UNS S31803, ASTM A182 UNS S32750, ASTM A182 UNS S32760 etc.

Carbon Steel - ASME SA105, ASTM A105, ASME SA105N, ASTM A105N, ASME SA350 LF2, ASTM A350 LF2, ASME SA694 / ASTM A694 F42, ASTM A694 F46, ASTM A694 F52, ASTM A694 F56, ASTM A694 F60, ASTM A694 F65, ASTM A694 F70
ISO 15590-3 L245, ISO 15590-3 L290, ISO 15590-3 L360, ISO 15590-3 L415, ISO 15590-3 L450, ISO 15590-3 L485

Alloy Steel - ASME SA182 / ASTM A182 F5, ASTM A182 F9, ASTM A182 F11, ASTM A182 F22, ASTM A182 F91

Nickel Alloys - ASTM B564 / ASME SB564 UNS NO2200, ASME SB564 UNS NO2201, ASME SB564 UNS NO4400, ASME SB564 ASME SB564 UNS NO6600, UNS NO6600, ASME SB564 UNS NO6601, ASME SB564 UNS NO6625, ASME SB564 UNS NO8800, ASME SB564 UNS NO8810, ASME SB564 UNS NO8811, ASME SB564 UNS No8825, ASME SB564 UNS NO10276

Spectacle Blind Flange Outer Diameter 1/2" NB TO 64" NB
Spectacle Blind Flange Pressure Class Class 150#, Class 300#, Class 400#, Class 600#, Class 900#, Class 1500#, Class 2500# or As Per Custom Requirement
PN 6, PN 10, PN 16, PN 25 and PN 40 etc
Spectacle Blind Flange Schedule Sch 10s TO Sch XXS or As Per Custom Requirement
Spectacle Blind Flange Facing Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Spectacle Blind Flange Dimension ASME B16.5, ASME B16.47 SERIES A, ASME B16.47 SERIES B, ASME B16.36, BS10, EN1092-1:2013, MSS SP44, ASA, API-605, ISO 7005, ISO 15590-3, DIN 2631--2638, DIN 2573-2576, DIN 2527, DIn 2641-2642, DIN 2565-2566, DIN2502, AWWA, AS2129 TABLE C, D, E, F, J etc..
Spectacle Blind Flange Types Welding Neck Flange, Slip On Flange, Socket Weld Flange, Lap Joint Flange, Threaded Flange, Blind Flange, Orifice Flanges, Plate Flange, Long Welding Neck Flanges, Weldoflange, Nipoflange, Expander Flange, Reducing Flange, WNRF Flange, SORF Flange, SWRF Flange, Custom Flange as per Drawing etc.
Spectacle Blind Flange Other Testing NACE MR0175, Ultrasound TEST, IGC TEST, Intergranular Corrosion Test as per ASTM A262 Practice E, Charpy Impact Test, Macro, Grain Size, Hardness, HIC, SSC, Sour Service etc.
Spectacle Blind Flange Value Added Services Rolling, Drill, Punch, CNC Machining, Sand Blasting, Shot Blasting, Heat Treatment, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Spectacle Blind Flange Packaging Loose / Crate / Wooden Pallet / Wooden Box / Plastic Cloth Wraps
Spectacle Blind Flange Shipment & Transportation By Road - Truck / Train Partial Load, Full Load, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 4 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes
Spectacle Blind Flange Material Test Certificate Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS, Bureau of Indian Standards BIS Approved ETC

Typical applications

  • Maintenance isolation of process lines
  • Turnaround blanking without full flange removal
  • Manifold and header isolation points
  • Safety-critical positive isolation stations

Frequently asked questions

What are Spectacle Blind Flanges?

Spectacle Blind Flanges are forged pipe flanges used to join pipe, valves and equipment with bolts and a gasket. Facing, bore and pressure class must match the piping class.

Which standards apply?

Dimensional: ASME B16.5 (NPS 1/2–24) and ASME B16.47 Series A/B for larger OD; EN 1092-1 / DIN for metric projects. Material follows the ASTM forging spec that matches the pipe (A182, A105, A350, A694, B564, etc.).

When should I choose Spectacle Blind Flanges?

Choose Spectacle Blind Flanges when the piping class and installation method call for this connection style. Confirm facing (RF/FF/RTJ), class and bore/schedule on the purchase order.

What should be on the purchase order?

Material grade / ASTM class, flange type and facing, size and pressure class, bore/schedule, quantity, destination, and documentation (EN 10204 3.1 or 3.2, PMI, NACE, TPI if required). Email sales@savoypipinginc.com.

Spectacle blind vs paddle blind and spacer?

A spectacle blind is one figure-8 piece. A paddle blind and spacer are separate plates used the same way when handling weight or clearance makes a one-piece spectacle impractical.

Spectacle Blind Flanges Packing Shipment

Spectacle Blind Flange is Covered with Plastic Cloth and Packed in Wooden Box, Wooden Pallet and Wooden Fumigated Crate. Our Packaging is Fully Waterproof and Safe for Transport with Proper Strips on Wooden Box, having Lifting Point.

Spectacle Blind Flange Exported Countries

We Export Spectacle Blind Flanges to Saudi Arabia, Iran, Iraq, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Israel, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Myanmar, Taiwan, Cambodia, Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Costa Rica, Puerto Rico, Trinidad And Tobago, Jamaica, Bahamas, Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherlands, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Croatia, Slovenia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Equatorial Guinea, The Republic Of Congo, Gabon, Europe, Africa, Asia, North America, South America, Middle East, Far East.etc

Spectacle Blind Flanges Supplying in States and Cities

We Supply Spectacle Blind Flanges Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Goa, Gujarat, Haryana, Himachal Pradesh, Jammu and Kashmir, Jharkhand, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Nagaland, Odisha, Punjab, Rajasthan, Sikkim, Tamil Nadu, Telangana, Tripura, Uttar Pradesh, Uttarakhand, West Bengal, Mumbai, Navi Mumbai, Pune, Nashik, Nagpur, Solapur, Kolhapur, Ambernath, Ahmednagar, Latur, Ahmadabad, Surat, Rajkot, Vadodara, Panaji, Madgaon, Chennai, Kolkata, Hyderabad, Bengaluru, Delhi, New Delhi, Ludhiana, Chandigarh, Raipur, Bhopal, Jamshedpur, Vishakhapatnam, Cochin, Ghaziabad, Noida, Gurugram, Bhillai, Durgapur, Vijaywada, Kanpur etc.

Savoy Piping Inc., is a well known worldwide Exporter of Spectacle Blind Flanges, Savoy Piping Inc., is committed to provide each and every customer with the highest standard of customer service. We deal in Spectacle Blind Flanges in India and Overseas, offering a wide range of Spectacle Blind Flanges