Super Duplex S32760 Spectacle BlindASTM A182 · ASME B16.48 · Manufacturer, trader & exporter, India
UNS S32760 · W.Nr 1.4501 · SB
A Super Duplex S32760 spectacle blind is a figure-8 plate with one solid end and one open ring, fitted between two flanges, made from Super Duplex S32760 to ASTM A182 F55. A spectacle blind lets operators positively isolate a line: rotate the solid end into the line to block flow, or the ring end to allow it. Larger sizes use separate spacers and paddle blanks.
- ASTM A182
- ASME B16.48
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Super Duplex S32760 Spectacle Blind?
- What it is
- A figure-8 plate with one solid end and one open ring, fitted between two flanges
- Material
- ASTM A182 F55
- Dimensions
- ASME B16.48
- Grade
- Super Duplex S32760 · UNS S32760
- Best at
- Seawater firewater, injection and offshore piping
Super Duplex S32760 Spectacle Blind Specification
| Product | Super Duplex S32760 Spectacle Blind |
|---|---|
| Material standard | ASTM A182 F55 |
| Dimensional standard | ASME B16.48 |
| Sizes | ½" – 24" (ASME B16.5) · 26" – 60" (ASME B16.47) |
| Pressure class | Class 150, 300, 400, 600, 900, 1500, 2500 · PN 6 – PN 100 |
| Facing | RF · FF · RTJ · tongue & groove |
| Bore | To match pipe schedule (state on order) |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Spectacle Blind
A spectacle blind lets operators positively isolate a line: rotate the solid end into the line to block flow, or the ring end to allow it. Larger sizes use separate spacers and paddle blanks.
- Thickness set by class and size
- Paddle blank and spacer versions for large bores
- Handle or lifting lug to order
More on choosing: Spectacle blind guide.
Super Duplex S32760 Spectacle Blind: Why S32760 for spectacle blinds
A spectacle blind lets operators positively isolate a line: rotate the solid end into the line to block flow, or the ring end to allow it. Larger sizes use separate spacers and paddle blanks. In Super Duplex S32760, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Duplex flanges give stainless corrosion resistance with roughly twice the strength of 316L. Super Duplex S32760 is picked for seawater firewater, injection and offshore piping. |
|---|---|
| Typical service | Offshore — Firewater and seawater piping. |
| B16.5 material group | 2.8 |
| Bolting | B7 (coated), B8M or duplex studs, as the project specifies |
| Welding to carbon steel | ER2209 or ER309L(Mo) is used when joining it to carbon steel, under a qualified WPS |
| Matching filler | ER2594 · Zeron 100X |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Super Duplex S32760 Spectacle Blind Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Molybdenum | As specified |
| Nitrogen | As specified |
| Copper | As specified |
| Tungsten | As specified |
| Carbon | As specified |
| Manganese | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A240 for UNS S32760.
Super Duplex S32760 Spectacle Blind Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
| Hardness | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A240 for UNS S32760 — Solution-annealed plate.
Full chemistry, properties and equivalents are on the Super Duplex S32760 grade page.
Other Super Duplex S32760 flanges
Super Duplex S32760 Spectacle Blind — questions buyers ask
When should I use a spacer and paddle blank instead of a spectacle blind?
In large sizes a spectacle blind becomes too heavy and awkward, so ASME B16.48 provides separate paddle blanks and spacers.
What pressure rating does a Super Duplex S32760 spectacle blind have?
It depends on class and temperature. Super Duplex S32760 forgings are in ASME B16.5 material group 2.8; read your class column in that group's table at the design temperature.
Can Super Duplex S32760 spectacle blinds be welded to carbon steel?
Yes — ER2209 or ER309L(Mo) is used when joining it to carbon steel, under a qualified WPS.
Which standard covers Super Duplex S32760 spectacle blinds?
The material is ASTM A182 F55; dimensions follow ASME B16.48. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Super Duplex S32760 spectacle blind?
The alloy price, the size and pressure class, quantity, and the testing and documents required. Send your list and we quote the same working day.
Can you supply Super Duplex S32760 spectacle blinds to NACE MR0175?
Yes. Super Duplex S32760 is listed in NACE MR0175 / ISO 15156-3 within its limits; state NACE compliance on the order and it is confirmed on the certificate.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026