ANSI/ASME/DIN SPECTACLE BLIND FLANGE
- PRODUCT DETAIL
Spectacle Blind Flange–also known as a figure-8 blind–is generally a piece of metal that is cut to fit between two pipe flanges and usually sandwiched between two gaskets.
A spectacle blind is often made from two metal discs that are attached to each other by a small section of steel. The shape is similar to a pair of glasses or “spectacles” – hence the name spectacle blind. One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance.
| Size | Weld neck flange:1/4″-160″
DN8-DN4000 |
| Pressure | America Series:Class 150 ,Class 300, Class 600, Class 900A ,Class 1500,Class 2500.
Europe Series:PN2.5,PN6,PN10,PN16,PN25,PN40,PN63,PN100,PN160, PN250,PN320,PN400. |
| Flange Facing Types | America Series:Flat face(FF),Raised face(RF),Tongue(T),Groove(G),Female(F),Male(M),Ring type joints face(RJ/RTJ)
Europe Series:Type A(Flat Face),Type B(Raised Face),Type C(Tongue),Type D(Groove),Type E(Spigot),Type F(Recess),Type G(O-Ring Spigot),Type H(O-Ring Groove) |
| Material | Carbon steel: ASTM A105,ASTM A105N,GB 20,C22.8.
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911 Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6 High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70 |
| Standards | ASME ANSI B16.5,ASME ANSI B16.47.
API 605,API 6L. MSS SP 44 CSA Z245.12 EN1092-1,EN1759-1. DIN2630,DIN2631,DIN2632,DIN2633,DIN2634,DIN2635,DIN2636, DIN2637,DIN2638. BS1560,BS 4504,BS 10. AFNOR NF E29-200-1 ISO7005-1 AS2129 JIS B2220 UNI 2276. UNI 2277.UNI 2278 .UNI 6089 .UNI 6090 |
| Industrial Processes | Die forging,Machining. |
| Application for weld neck flanges | Natural gas,chemical,petroleum,ship building,marine,paper making, metallurgy, electric, power, boiler , etc. |
