Spectacle Blind Flange Specification:
| Standard | Type | Class | Size |
| ASME B16.5 | WN/LWN/SO/Blind/Lap Joint | 150#-2500# | 1/2″-24″(Except Blind Flange 2500lb 1/2″-12″) |
| EN1092-1:2002 | Plate flange for welding/loose plate flange with weld-on plate collar or for lapped pipe end/Blind Flange/WN flange | PN2.5-PN100 | DN10-DN4000 |
| Other | WN/LWN/SO/SW/blind/plate/threaded/anchor/swivel/girth/lap joint/reducing/orifice | ||
| spectacle blind/paddle blind/spacer ring/orifice plate/bleed ring | |||
| Speical Products: Rings/Forgings/Disc/Shaft Sleeve | |||
| Sealing Surface | RF FF RTJ TF GF LF LM | ||
| Flange Face Finish | Stock Finish/Spiral Serrated/Concentric Serrated/Smooth Finish(Ra 3.2 and 6.3 micrometers) | ||
| 125-250 AARH(it is called smooth finish) | |||
| 250-500 AARH(it is called stock finish) | |||
| Coating | Vanish, yellow paint, anti-rust oil, galvanizing etc | ||
Spectacle Blind Flange Material Grades:
| Carbon Steel | ASTM /ASME A/SA105(N), ASTM A266 GR.4, ASTM/ASME A/SA350 LF2/LF3, ASTM/ASME A/SA694 F52, F56, F60, F65, F70 |
| Alloy Steel | ASTM/ASME A/SA 182 F5, F9, F11, F22, F91 |
| Stainless Steel | ASTM/ASME A/SA 182 F304, 304L, 304H, 310H, 316, 316H, 316L, 316LN, 316Ti, 317, 317L, 321, 321H, 347, 347H, 904L |
| Duplex and Super Duplex |
ASTM/ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61, S31803, S32205, S32550, S31254, SMO254, S32750, S32760, S32950 |
| Nickel Alloy Steel | ASTM/ASME B/SB 564 UNS N02200(NICKEL 200), UNS N04400, (MONEL 400), UNS N08825( INCOLOY 825), UNS N06600(INCONEL 600), UNS N06601(INCONEL 601), UNS N06625(INCONEL 625), UNS N10276(HASTELLOY C276) |
| ASTM/ASME B/SB160 UNS N02201(NICKEL 201), ASTM B/SB472 UNS N08020(Alloy 20) | |
| Copper Alloy | ASTM/ASME B/SB151 UNS N07060, 71500, C70600(CuNi 90/10), C71500(CuNi 70/30) |
| Titanium | ASTM/ASME B/SB381 Grade 2, Grade 5, Grade 7 |
