Blind Flange in all standard face types and pressure classes to ANSI B16.5. Get quotes from verified suppliers on MetalMitra.
- Blind Flange
- Blind Flanges
- ASME Flanges
- ANSI Flanges
- DIN Flanges
- BS Flanges
- EN Flanges
- 150–2500 LBS
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Specifications
| Dimensions | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges & Custom Dimensions |
|---|---|
| Standards | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
| Pressure Class | 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| DIN Pressure Rating | ND-6, ND-10, ND-16, ND-25, ND-40 & Others |
| Size | 1/8" NB to 48" NB |
| Flange Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Manufacturing | Forged / Machined / Custom Manufactured |
| Customization | Available as per customer drawings and specifications |
Grades & standards
- ASME B16.5
- ASME B16.47
- MSS SP-44
Blind Flange for reliable pipe-to-pipe and pipe-to-equipment joints, available on MetalMitra in all standard face types and pressure classes to ANSI B16.5, with mill-certified traceability on every lot.
Blind Flanges are solid flanges used to close the end of a piping system, nozzle or pressure vessel opening. They are designed to provide a secure termination and can also facilitate access for inspection, maintenance and future system modifications.
Why engineers choose it
- Pressure Containment — Designed for reliable closure and pressure isolation in piping systems.
- Multiple Pressure Classes — Available from 150 LBS through 2500 LBS and selected DIN ratings.
- Multiple Face Types — FF, RF and RTJ configurations available for different applications.
- Wide Material Selection — Stainless steel, duplex, alloy steel, carbon steel and nickel alloys.
DIN Blind Flange Standards
| Standard | Applicable DIN Specifications |
|---|---|
| DIN | DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656 |
| DIN | DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635 |
| DIN | DIN 2636, DIN 2637, DIN 2638, DIN 2673 |
ANSI & BS Blind Flange Standards
ANSI Standards — ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36 and ANSI B16.48.
BS Standards — BS 4504, BS 1560 and BS 10.
Custom Requirements — Blind Flanges can be manufactured according to approved customer drawings and specifications.
Blind Flanges Material & Grades
Stainless Steel Blind Flanges — ASTM A182 / A240 F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H and 904L.
Duplex & Super Duplex — ASTM / ASME A/SA 182 F44, F45, F51, F53, F55, F60 and F61.
Alloy Steel — ASTM / ASME A/SA 182 & A387 F1, F5, F9, F11, F12, F22 and F91.
Carbon Steel — ASTM / ASME A/SA 105, A350, A181 LF2, A516 Gr.70, A36 and A694 grades.
Nickel Alloy — ASTM SB564, SB160, SB472 and SB162 including Nickel, Monel, Inconel, Hastelloy and Alloy 20 grades.
Copper Alloy — ASTM SB61, SB62, SB151 and SB152 including Cu-Ni 90/10, Cu-Ni 70/30 and selected copper grades.
Available Blind Flange Materials
| Material Category | Grades / Specifications |
|---|---|
| Stainless Steel | ASTM A182 / A240 F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L |
| Duplex & Super Duplex | F44, F45, F51, F53, F55, F60, F61 |
| Alloy Steel | F1, F5, F9, F11, F12, F22, F91 |
| Carbon Steel | A105, A350, A181 LF2, A516 Gr.70, A36, A694 F42, F46, F52, F60, F65, F70 |
| Nickel Alloys | Nickel 200, Nickel 201, Monel 400, Monel 500, Inconel 600, Inconel 601, Inconel 625, Inconel 800, Inconel 825, Hastelloy C276, Alloy 20 |
| Copper Alloys | Cu-Ni 90/10, Cu-Ni 70/30 and selected UNS copper grades |
Blind Flange Face Types
Flat Face (FF) — Flat sealing face configuration used for suitable low-pressure and piping applications.
Raised Face (RF) — Raised sealing surface designed for common industrial pressure piping applications.
Ring Type Joint (RTJ) — Precision-machined groove configuration for demanding high-pressure applications.
Dimensional Tolerances of Blind Flanges
The following dimensional tolerance information is presented based on the supplied ASME B16.5 reference data. Final dimensional requirements should be verified against the applicable edition of the governing standard.
| Parameter | Tolerance / Requirement |
|---|---|
| Outside Diameter | ≤ 24 = 1.6 mm / > 24 = ± 3.2 mm |
| Inside Diameter | Not Applicable |
| Diameter of Contact Face | 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face / Tongue & Groove / Male-Female = ± 0.4 mm |
| Outside Diameter of Hub | ≤ 12 = +2.4 / −1.6 mm ≥ 14 = ±3.2 mm |
| Diameter of Counterbore | Not Applicable |
| Drilling – Bolt Circle | 1.6 mm |
| Bolt Hole Spacing | ±0.8 mm |
| Eccentricity of Bolt Circle | ≤ 2½ = 0.8 mm max. ≥ 3 = 1.6 mm max. |
| Thickness | ≤ 18 = +3.2 / −0 mm ≥ 20 = +4.8 / −0 mm |
| Length Through Hub | ≤ 18 = +3.2 / −0.8 mm ≥ 20 = +4.8 / −1.6 mm |
Where it is used
- Oil & Gas
- Petrochemical Plants
- Chemical Processing
- Power Generation
- Marine Industry
- Sugar Industry
- Nuclear Industry
- Defence Industry
- Refineries
- Process Piping
- Pressure Vessels
- Industrial Fabrication
Inspection & paperwork
Suppliers on MetalMitra back Blind Flange with the checks and paperwork your QA team expects.
- Dimensional inspection
- Visual and surface inspection
- Grade verification against the order
- Chemical composition verification
- Mechanical testing as applicable
- Hardness testing as applicable
- Flange face inspection
- Bolt-hole and drilling inspection
- Non-destructive testing as applicable
- EN 10204 3.1 Mill Test Certificate
- Third-party inspection (TPI) on request
- Project-specific documentation on request
The MetalMitra advantage
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, EN 10204 3.1 MTCs and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Get a quote
Tell us the specification, quantity and destination you need for Blind Flange. MetalMitra connects you with suppliers who can deliver.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the mill test certificate.
Applications & industries
- Oil & Gas
- Petrochemical Plants
- Chemical Processing
- Power Generation
- Marine Industry
- Sugar Industry
- Nuclear Industry
- Defence Industry
- Refineries
- Process Piping
- Pressure Vessels
- Industrial Fabrication
- Petrochemical & Refining
- Power Generation
- Chemical Processing
- Marine & Shipbuilding
- Sugar
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
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