Carbon Steel CS Figure 8 Blank or Spectacle Blind

Carbon Steel Figure 8 Blanks (or Spectacle Blinds) are key components used to isolate sections of pipelines for maintenance or control purposes. Here’s a comprehensive overview of their specifications, including material grades, dimensions, and standards.3. Material GradesCarbon Steel Figure 8 Blanks are typically made from various carbon steel grades. Common grades include:1. ASTM A1052. ASTM A234 WPB3. ASTM A350 LF24. ASTM A516 GR 60/70, ASTM A516 GR 60, ASTM A 516 GR 704. Pressure RatingsSpectacle blinds are designed to handle specific pressure classes, which define their pressure-handling capabilities:• Class 150: Low-pressure applications• Class 300: Medium-pressure applications• Class 600: High-pressure applications• Class 900: Very high-pressure applications• Class 1500: Extremely high-pressure applications• Class 2500: Ultra-high-pressure applications5. Standards• ASME B16.5 B16.48: Covers dimensions, materials, and pressure-temperature ratings for flanges and fittings, including spectacle blinds.• MSS SP-44: Specification for spectacle blinds, including dimensions, pressure ratings, and material requirements7. Testing and Quality ControlSpectacle blinds are subject to rigorous testing to ensure their reliability:• Visual Inspection: Check for surface defects.• Dimensional Inspection: Confirm that the dimensions match the specifications.• Non-Destructive Testing (NDT): Includes methods such as ultrasonic testing or radiographic testing to detect internal flaws.SummaryCarbon Steel Figure 8 Blanks (Spectacle Blinds) are vital for isolating sections of pipelines. They come in various materials such as ASTM A105, ASTM A234 WPB, and ASTM A350 LF2 to suit different operational requirements. Available in multiple pressure classes and sizes, they conform to standards like ASME B16.5 and MSS SP-44. Proper marking, material selection, and rigorous testing ensure their effectiveness and reliability in pipeline systems.SPECFICATIONS:• Manufacturing Range: DN 15 (1/2”) to DN 1500 (60”)• Rating/Class: 150/300/600/900/1500/2500 and SCH 5/5S/10/10S/20/40/STD/60/80/XS/100/120/140/160/XXS etc.• Dimension Standard: ANSI/ASME B16.48/B16.5, etc.Material Type: HIGH NICKEL ALLOYS: Inconel 600, Inconel 625, Inconel 718, Inconel 800, Inconel 825, Monel 400, Monel K-500, Hastelloy C-276, Hastelloy B-2, Hastelloy C-22, Titanium Gr 2, Titanium Gr 5CARBON/ALLOY STEEL: ASTM/ASME A105/105N, ASTM / ASME A182, ASTM / ASME A335 GR F1, F5, F9, F11, F12, F22, F23, F91, ASTM A516 GR 60/70, ASTM A516 GR 60, ASTM A516 GR 70LTCS: ASTM/ASME A350 LF2, ASME/ASTM A694 F42, F46, F52, F60, F65, F70