ASME B16.48 Spectacle Blank Flange Datasheet
Item | Specification |
---|---|
標準 | ASME B16.48 |
種類 | Spectacle Blind (Spectacle Blank) Flange |
Size Range | 1/2″ – 24″ (or as per custom requirement) |
Pressure Class | 150, 300, 400, 600, 900, 1500, 2500 (ANSI classes) |
Material Options | 炭素鋼, Stainless Steel (304, 316), 合金鋼, Duplex Stainless Steel |
Thickness | As per ASME B16.48 standards for specified size and pressure class |
Face Type | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
Surface Finish | Machined, Polished (for specific applications) |
Temperature Range | Based on material specifications (up to 815°C for high-grade alloys) |
Testing and Certification | Hydrostatic testing, Ultrasonic testing, Hardness test, Material traceability |
Advantages of Spectacle Blind Flanges
- Enhanced Safety: Spectacle blinds allow for the secure blocking or isolation of sections of piping systems, enhancing safety during maintenance or repairs.
- Clear Visual Identification: The unique “figure-8” shape, with one open side and one closed side, makes it easy to identify whether a line is open or blocked.
- Easy Operation: Operators can quickly rotate the blank and open the side as needed for flow control or shutdown.
- Cost-Effective Isolation: They provide a simple, affordable method of isolating a pipeline without the need for additional valves or complex equipment.
- Reliability in Extreme Conditions: Made of materials suitable for high-pressure, high-temperature environments, making them reliable even under demanding industrial conditions.
Applications of Spectacle Blind Flanges
- Oil and Gas Pipelines: Used for blocking sections of oil, gas, or chemical pipelines for maintenance or testing.
- Petrochemical and Chemical Plants: Essential in isolating toxic or hazardous materials during repairs or inspections.
- Power Generation: Used in power plants, especially in high-temperature and high-pressure piping systems, to control steam and other utility lines.
- Refineries and Process Plants: To prevent the flow of gases and liquids when sections of the plant require shutdown or safety isolation.
- Pharmaceutical and Food Processing: Employed in systems where clean separation is essential to avoid contamination during maintenance.
- Marine and Offshore: Common in marine industries, especially for pipelines that transport fuel or water to prevent leaks.
Material
ニッケル合金: ASTM / ASME S / B366 UNS N08020, N04400, N06600, N06625, N08800, N08810, N08825, N10276、N10665、N10675
スーパーステンレス: ASTM/ASME S/A182 F44, F904Lの, F317L型
ステンレス鋼: ASTM/ASME S/A182 F304, F304L型, F304H型, F316, F316L型, F321, F321H型, F347H型
デュプレックススチール: ASTM A182 F51, F53, F55
合金鋼: ASTM / ASME S / A182 F11, F12 キー, F22 キー, F5 キー, F9 キー, F91の
炭素鋼: ASTM/ASME S/A105, ASTM/ASME S/A350 LF2, ASTM / ASME S / A694 / A694M, F42 キー, F52, F56, F60, F65, F70….ASTM/ASME S/A350LF2, ASTM / ASME S / A694 / A694M, F42 キー, F52, F56, F60, F65, F70….
試験
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