The ASME B16.48 is a standard that takes into consideration such as materials, dimensions, pressure-temperature ratings, tolerances, marking, as well as testing for flanges such as piping spectacle blind flange in a piping system. A Spectacle Blind flange is typically used to permanently separate piping systems, or they could be used to form a connection with each other. A Spectacle Blind Flange Manufacturer cuts two discs from a steel plate of a certain thickness. These two discs are appended to each other by section of steel in such a manner that they visually appear similar to the nose piece of a pair of glasses. Hence, this flange is referred to as a spectacle flange. While one of the discs in the flange is a solid plate, and the other disk is a ring, whose inside diameter is equivalent to that of a flange.
ASME B16.5 Spectacle Blind Flange
Stainless Steel Spectacle Blind Flange
Carbon Steel Spectacle Blind Flange
A Stainless steel spectacle blind flange could be used in applications for those piping systems, which regularly have a requirement to be separated or unconnected from other installations. Typically, this flange is mounted in an open position which promotes the flow of media through the pipe is possible. In the instance of the carbon steel spectacle blind flange being in a close position, the pipe is blanked off by rotation, leading to no flow. A reason to rotate the flange in the close position is due to maintenance in a piping system. This run will take place through the hole, that has been drilled in the connection piece. When all the bolts have been loosened, the ASME B16.48 Spectacle Blind Flange can be rotated. After the old gaskets have been replaced by new gaskets, the bolts could be re-assembled and tightened.
ASME B16.5 Spectacle Blind Flange Size Chart | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
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Spectacle Blind Flange Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
Spectacle Blind Flange Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
Spectacle Blind Flange Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
JIS | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
Most common types of Spectacle Blind Flange | forged / Threaded / Screwed / Plate |
Production technique |
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Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, , Groove |
Special design | As per your drawing
AS, ANSI, BS, DIN and JIS |
Origin | Indian / West Europe / Japan / USA / Korean |
Manufacturer of | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. Spectacle Blind Flange: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange
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Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
NPS | Outside ØA | Inside ØB | CenterlineC | Thicknesst | Web WidthW |
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1/2 | 45 | 16 | 60 | 3 | 38 |
3/4 | 54 | 21 | 70 | 3 | 38 |
1 | 64 | 27 | 80 | 3 | 38 |
1¼ | 73 | 42 | 90 | 6.4 | 38 |
1½ | 83 | 48 | 100 | 6.4 | 38 |
2 | 102 | 61 | 120 | 6.4 | 51 |
2½ | 107 | 73 | 140 | 6.4 | 51 |
3 | 133 | 89 | 150 | 6.4 | 64 |
3½ | 159 | 102 | 175 | 9.7 | 64 |
4 | 172 | 114 | 190 | 9.7 | 64 |
5 | 194 | 141 | 215 | 9.7 | 76 |
6 | 219 | 168 | 240 | 12.7 | 76 |
8 | 276 | 219 | 300 | 12.7 | 76 |
10 | 337 | 273 | 360 | 15.7 | 102 |
12 | 406 | 324 | 430 | 19.1 | 102 |
14 | 448 | 356 | 475 | 19.1 | 108 |
16 | 511 | 406 | 460 | 22.4 | 108 |
18 | 546 | 457 | 580 | 25.4 | 114 |
20 | 603 | 508 | 635 | 28.4 | 121 |
24 | 714 | 610 | 750 | 31.8 | 140 |
Types of Spectacle blind flanges | Price | Unit |
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stainless steel Spectacle blind flanges class 150 | $22.45 | NOS |
stainless steel Spectacle blind flanges class 300 | $25.39 | NOS |
stainless steel Spectacle blind flanges class 600 | $31.19 | NOS |
carbon steel Spectacle blind flanges class 150 | $75.89 | NOS |
carbon steel Spectacle blind flanges class 300 | $88.12 | NOS |
carbon steel Spectacle blind flanges class 600 | $99.52 | NOS |
Spectacle blind flanges ansi b16 5 class 150 | $75.56 | NOS |
Spectacle blind flanges ansi b16 5 class 300 | $95.56 | NOS |