Stainless Steel SS Figure 8 Blank or Spectacle Blind

Stainless Steel Figure 8 Blanks (or Spectacle Blinds) are used to isolate sections of pipelines, providing a means to block or bypass the flow of fluids. These components are manufactured from various grades of stainless steel to ensure durability and resistance to corrosion. Below are the full specifications, including all relevant grades.3. Material GradesStainless steel Figure 8 Blanks can be made from several grades, each with distinct properties:1. Austenitic Stainless Steel:o Grade: ASTM A182 F304 (1.4301)? Description: General-purpose stainless steel with good corrosion resistance.? Applications: Used in a wide range of industrial applications.? Properties:? Tensile Strength: 70 ksi (485 MPa) min? Yield Strength: 30 ksi (205 MPa) min? Elongation: 40% mino Grade: ASTM A182 F316 (1.4401)? Description: Stainless steel with enhanced corrosion resistance, especially in chloride environments.? Applications: Marine environments, chemical processing.? Properties:? Tensile Strength: 70 ksi (485 MPa) min? Yield Strength: 30 ksi (205 MPa) min? Elongation: 40% min2. Low Carbon Austenitic Stainless Steel:o Grade: ASTM A182 F304L (1.4307)? Description: Similar to 304 but with lower carbon content for better weldability.? Applications: Chemical and food processing industries.? Properties:? Tensile Strength: 70 ksi (485 MPa) min? Yield Strength: 30 ksi (205 MPa) min? Elongation: 40% mino Grade: ASTM A182 F316L (1.4404)? Description: Low carbon variant of 316 stainless steel for improved weldability.? Applications: Corrosive environments, marine applications.? Properties:? Tensile Strength: 70 ksi (485 MPa) min? Yield Strength: 30 ksi (205 MPa) min? Elongation: 40% min3. Duplex Stainless Steel:o Grade: ASTM A182 F51 (UNS S31803)? Description: Combines properties of both ferritic and austenitic stainless steels for higher strength and corrosion resistance.? Applications: Oil and gas, chemical processing.? Properties:? Tensile Strength: 80-100 ksi (550-690 MPa)? Yield Strength: 50 ksi (345 MPa) min? Elongation: 25% mino Grade: ASTM A182 F60 (UNS S32205)? Description: Higher strength duplex stainless steel with superior corrosion resistance.? Applications: Harsh environments requiring high strength and corrosion resistance.? Properties:? Tensile Strength: 85-110 ksi (585-760 MPa)? Yield Strength: 60 ksi (415 MPa) min? Elongation: 25% min4. Super Duplex Stainless Steel:o Grade: ASTM A182 F53 (UNS S32750)? Description: Offers even higher strength and corrosion resistance than duplex stainless steels.? Applications: High-pressure and corrosive environments.? Properties:? Tensile Strength: 95-115 ksi (655-790 MPa)? Yield Strength: 80 ksi (550 MPa) min? Elongation: 25% mino Grade: ASTM A182 F55 (UNS S32760)? Description: Super duplex grade with enhanced resistance to pitting and crevice corrosion.? Applications: Oil and gas, marine applications.? Properties:? Tensile Strength: 100-125 ksi (690-860 MPa)? Yield Strength: 80 ksi (550 MPa) min? Elongation: 20% min4. Pressure RatingsPressure ratings of Figure 8 Blanks are categorized by:• Class 150, Class 300, Class 600, Class 900, Class 1500, Class 25005. Standards• ASME B16.5/B16.48• MSS SP-44SPECFICATIONS:• 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.STAINLESS STEEL: ASTM A182 F304 (1.4301), F304L (1.4306/1.4307), F316 (1.4401), F316L (1.4404), F304H, F309S, F309H, F310S, F310H, F316TI, F316H, F316LN, F317, F317L, F321, F321H, F11, F22, F91, F347, F347H, F904L,  UNS S 31254 (1.4547) DUPLEX STEEL: Duplex (S32205 / S31803) X2CrNiMoN22-5-3 (1.4462), S32750 (EN/DIN 1.4410, X2CrNiMoN25-7-4), S32760 (1.4501, X2CrNiMoCuWN 25-7-4)