A spectacle blind flange is a specialty flange made of half of the blind plate and half of the ring attached in the middle by a small section of steel. It's a kind of pipe parts, mainly for the convenience of maintenance. Spectacle blind flanges are most commonly used for pipeline flanges that need to change the process.
We GUTE is the manufacturer that provide all kinds of steel flanges like Spectacle Blind Flanges, Weld Neck Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges and so on, and also other special flanges according to the client's requirement.
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), A350 LF2/LF3, A694 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, 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 |




















南宫市|
大埔区|
阳朔县|
同德县|
新丰县|
浮山县|
南城县|
裕民县|
清丰县|
屏东县|
镇江市|
汝阳县|
水城县|
成都市|
咸阳市|
涿州市|
北宁市|
长葛市|
睢宁县|
盖州市|
武安市|
泾源县|
绥滨县|
纳雍县|
清镇市|
洛宁县|
安平县|
惠来县|
日照市|
固镇县|
同江市|
韶关市|
磐安县|
阳江市|
任丘市|
芦溪县|
营山县|
扶风县|
昌图县|
东宁县|
扬中市|