Spectacle Blind Flange ASME B16.48 Manafacturer in China
A spectacle blind flange,also knowns as Figure 8 flanges, is a dual-plate piping component—shaped like a pair of spectacles or figuire 8,—with one solid (blind) plate and one ring-shaped (spacer) plate joined together. It allows you to quickly switch a pipeline or valve between an open (flow) position and a closed (isolation) position without disassembling the flange connection.
ASTM A182 F53 UNS S32750 Spectacle Blind Flange (ASME B16.48)
- Material: ASTM A182 F53 (UNS S32750)Super duplex stainless steel
- Standard: ASME B16.48
- Pressure Classes: 150# – 2500#
- Nominal Sizes: ½″ – 24″
- Face Types: Raised Face (RF), Ring Type Joint (RTJ) Flat Face,(FF)
ASME B16.48 standard for Spectacle blindl flange,Paddle Blank and Spacer
This Standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for operational line blanks in sizes NPS 1/2 through NPS 24 for installation between ASME B16.5 flanges in the 150, 300, 600, 900, 1500, and 2500 pressure classes.
astm a182 f53 material has carbon, manganese, phosphorus, silicon, 24% chromium, 6% nickel, 3% molybdenum and nickel and copper.
astm a182 f53 Chemical composition
| Grade | UNS Designation | Composition, % | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Ni | Cr | Mo | CbB | Ti | Other Elements | ||||
| ASTM A182 Grade F53 | S32750 | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | … | … | N 0.24-0.32 Cu 0.50 | ||
Super duplex material ASTM A182 F53 can be used for Oil and gas industry equipment, Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems, Chemical process industries, heat exchangers, vessels, and piping,
Typical Applications of Super Duplex F53
- Oil & Gas: Wellhead Christmas trees, pipeline isolation, pressure testing.
- Petrochemical: Reactor feed isolation, heat exchanger maintenance.
- Power Generation: Turbine bypass circuits, condenser tube bundle testing.
- Marine & Offshore: Ballast systems, fire-water loops, chemical injection lines.
