Blind Flanges
OVERVIEW
Blind Flanges
TUBA offer Blind Flanges according to ASME, EN, ISO and DIN standards. Blind Flanges is used widely in applications where the pipeline has to be terminated. The blind end or the plate of the flange seals the connection so that the flow ends with the blind flange. Blind Flanges are available in many different materials. Such as - Stainless Steel Blind Flanges, Alloy Steel Blind Flanges, Carbon Steel Blind Flanges, Aluminium Blind Flanges, Duplex Steel Blind Flanges, Hastelloy Blind Flanges, Incoloy Blind Flanges, Inconel Blind Flanges, Monel Blind Flanges, Nickel Alloy Blind Flanges, Nitronic Alloy Blind Flanges, Titanium Blind Flanges,
A blind flange is a solid flange that is used to block off a part of a pipe or an end on a vessel that is not used, which is typically a pipe coming out of a vessel and is usually flanged so it can be connected to valves or piping. BLRF Flanges are manufactured without a bore and used to blank off the ends of piping, Valves, and pressure vessel openings.
A flange is an external or internal ridge, or rim, for strength, as the flange of an iron beam such as an I-beam or a T-beam ; or for attachment to another object, as the flange on the end of a pipe, steam cylinder, etc., If the Paddle Blind Flanges is raised face, many Blind Flange Manufacturers in India, would recommend using a standard ring gasket that is appropriate for the service and/or test.
Blind Flange Specification
| Size Chart | 1/2" (15 NB) to 48" (1200NB) DN10~DN5000 |
|---|---|
| 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 SP44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Blind Flange Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| Blind Flanges Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| Blind Flange | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| Blind Flange UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Blind Flange EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Blind Flanges Production technique | Forged, Heat treated and machined |
| Blind Flange 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 |
| Blind Flange Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Blind Flanges Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Blind Flange Origin | Indian / West Europe / Japan / USA / Korean |
| Manufacturer of Blind Flange | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. B.S: BS4504 , BS3293, BS1560, BS10 The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276 |
| Blind Flange Uses & application | Bitumen upgraders. Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids. |
| Blind Plate Flanges Export to | Ireland, Singapore, Indonesia, Ukraine, Saudi & Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
Blind Flanges Materials & Grades
| Materials | : | Standard, Grades |
| Stainless Steel Blind Flanges | : | ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L |
| Carbon Steel Blind Flanges | : | ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, |
| F60, F65, F70 | ||
| Alloy Steel Blind Flanges | : | ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91 |
| Duplex Steel Blind Flanges | : | ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61 |
| 6% Moly / Super Duplex Blind Flanges | : | ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61 |
| Low Temperature Steel Blind Flanges | : | ASTM A350 LF2, LF3, LF6 |
| High Yield Blind Flanges | : | ASTM A694 F42, F52, F60, F65, F70 |
| Nickel Alloys Blind Flanges | : | ASTM SB564, SB160, SB472, SB162 – Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020) |
| Copper Alloys Blind Flanges | : | ASTM SB 61 , SB62 , SB151 , SB152 – UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200 |
| Alloys Blind Flanges | : | ALLOY 20, ALLOY C, ALLOY C276, ALLOY B2 |
| Other Grade of Blind Flanges | : | Bronze, Brass, Cupro Nickel, Titanium, Inconel, Monel, Hastelloy |
ASME B16.5 Blind Flanges Dimensions:
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
| Diameter – D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Height – B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter – G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter – K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter – L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
ASME B16.5 Blind Flanges Dimensional Tolerances
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter not applicable |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Outside Diameter of Hub ≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore not applicable |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0 |
Length thru Hub ≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm |
ASTM / ASME / AISI Class 150 Blind Flanges Dimension & Sizes
| Size in Inch |
Size in mm |
Outer Dia. |
Flange Thick. |
RF Dia. |
RF Height |
PCD | No of Bolts |
Bolt Size UNC |
Machine Bolt Length |
RF Stud Length |
Hole Size | ISO Stud Size |
Weight in kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | E | |||||||||
| 1/2 | 15 | 90 | 9.6 | 34.9 | 2 | 60.3 | 4 | 1/2 | 50 | 55 | 5/8 | M14 | 0.9 |
| 3/4 | 20 | 100 | 11.2 | 42.9 | 2 | 69.9 | 4 | 1/2 | 50 | 65 | 5/8 | M14 | 0.9 |
| 1 | 25 | 110 | 12.7 | 50.8 | 2 | 79.4 | 4 | 1/2 | 55 | 65 | 5/8 | M14 | 0.9 |
| 1 1/4 | 32 | 115 | 14.3 | 63.5 | 2 | 88.9 | 4 | 1/2 | 55 | 70 | 5/8 | M14 | 1.4 |
| 1 1/2 | 40 | 125 | 15.9 | 73 | 2 | 98.4 | 4 | 1/2 | 65 | 70 | 5/8 | M14 | 1.8 |
| 2 | 50 | 150 | 17.5 | 92.1 | 2 | 120.7 | 4 | 5/8 | 70 | 85 | 3/4 | M16 | 2.3 |
| 2 1/2 | 65 | 180 | 20.7 | 104.8 | 2 | 139.7 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 3.2 |
| 3 | 80 | 190 | 22.3 | 127 | 2 | 152.4 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 4.1 |
| 3 1/2 | 90 | 215 | 22.3 | 139.7 | 2 | 177.8 | 8 | 5/8 | 75 | 90 | 3/4 | M16 | 5.9 |
| 4 | 100 | 230 | 22.3 | 157.2 | 2 | 190.5 | 8 | 5/8 | 75 | 90 | 3/4 | M16 | 7.7 |
| 5 | 125 | 255 | 22.3 | 185.7 | 2 | 215.9 | 8 | 3/4 | 85 | 95 | 7/8 | M20 | 9.1 |
| 6 | 150 | 280 | 23.9 | 215.9 | 2 | 241.3 | 8 | 3/4 | 85 | 100 | 7/8 | M20 | 11.8 |
| 8 | 200 | 345 | 27 | 269.9 | 2 | 298.5 | 8 | 3/4 | 90 | 110 | 7/8 | M20 | 20.5 |
| 10 | 250 | 405 | 28.6 | 323.8 | 2 | 362 | 12 | 7/8 | 100 | 115 | 1 | M24 | 32 |
| 12 | 300 | 485 | 30.2 | 381 | 2 | 431.8 | 12 | 7/8 | 100 | 120 | 1 | M24 | 50 |
| 14 | 350 | 535 | 33.4 | 412.8 | 2 | 476.3 | 12 | 1 | 115 | 135 | 1 1/8 | M27 | 64 |
| 16 | 400 | 595 | 35 | 469.9 | 2 | 539.8 | 16 | 1 | 115 | 135 | 1 1/8 | M27 | 82 |
| 18 | 450 | 635 | 38.1 | 533.4 | 2 | 577.9 | 16 | 1 1/8 | 125 | 145 | 1 1/4 | M30 | 100 |
| 20 | 500 | 700 | 41.3 | 584.2 | 2 | 635 | 20 | 1 1/8 | 140 | 160 | 1 1/4 | M30 | 130 |
| 24 | 600 | 815 | 46.1 | 692.2 | 2 | 749.3 | 20 | 1 1/4 | 150 | 170 | 1 3/8 | M33 | 196 |
ASTM / ASME / AISI Blind Flanges Weight Chart
| CLASS | Nominal Pipe Size | Blind | Threaded | Socket Weld | Lap Joint | Blind | Weld Neck |
| 150 lb | ½ | 1 | 1 | 2 | 1 | 2 | 2 |
| ¾ | 2 | 2 | 2 | 2 | 2 | 2 | |
| 1 | 2 | 2 | 2 | 2 | 2 | 3 | |
| 1¼ | 3 | 3 | 3 | 3 | 3 | 3 | |
| 1½ | 3 | 3 | 3 | 3 | 4 | 4 | |
| 2 | 5 | 5 | 5 | 5 | 5 | 6 | |
| 2½ | 8 | 8 | 8 | 8 | 7 | 10 | |
| 3 | 9 | 9 | 9 | 9 | 9 | 11.5 | |
| 3½ | 11 | 12 | 11 | 11 | 13 | 12 | |
| 4 | 13 | 13 | 13 | 13 | 17 | 16.5 | |
| 5 | 15 | 15 | 15 | 15 | 20 | 21 | |
| 6 | 19 | 19 | 19 | 19 | 27 | 26 | |
| 8 | 30 | 30 | 30 | 30 | 47 | 42 | |
| 10 | 43 | 43 | 43 | 43 | 70 | 54 | |
| 12 | 64 | 64 | 64 | 64 | 123 | 88 | |
| 14 | 90 | 90 | 90 | 105 | 140 | 114 | |
| 16 | 106 | 98 | 98 | 140 | 180 | 140 | |
| 18 | 130 | 130 | 130 | 160 | 220 | 165 | |
| 20 | 165 | 165 | 165 | 195 | 285 | 197 | |
| 22 | 185 | 185 | 185 | 245 | 355 | 225 | |
| 24 | 220 | 220 | 220 | 275 | 430 | 268 |
Manufacturing Standards of Blind Flanges
| ASME/ANSI B16.5 | Blind Flange |
| PRESSURE CLASS | 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc. |
| DIN EN 1092-1 Face Dimensions | PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400 |
| BS 4504 SEC 3.1, BS 4504[PART 1], BS 1560 BOSS | Blind Hubbed Flange |
| BS10 | Blind Boss Flange |
| TABLE | D, E, F, H |
| DIN FLANGES | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673 |
| PRESSURE CLASS | PN 6 TO PN 100 |
ANSI B16.5 Blind Flange Forms & Availability
| Products | Size | |
| ANSI B16.5 Raised Face Blind Flange | ANSI B16.5 Stainless Steel SORTJ Flanges | Sizes 1/8″ – 36″ Raised Face or Flat Face |
| ANSI B16.5 Carbon Steel Blind Plate Flange | ANSI B16.5 Alloy Steel Blind Pipe Flange | |
| ANSI B16.5 Blind Raised Face Flange | ANSI B16.5 High Nickel Alloy Blind Flanges | |
| ANSI B16.5 Nickel Class 150 Blind Flanges | ANSI B16.5 Monel Class 300 Blind Flanges | |
| ANSI B16.5 Hastelloy Class 600 Blind Flanges | ANSI B16.5 Titanium Class 900 Blind Flanges | |
| ANSI B16.5 Cu-Ni Class 1500 Blind Flanges | ANSI B16.5 Alloy 20 Class 2500 Blind Flanges | |
| ASME B16.47 SMO 254 Series A Blind Flanges | ASME B16.47 Inconel Series B Blind Flanges | |
Blind Flange Standard
| American Steel Blind Flanges Standard | |
| Standard Code | Standard Name |
| ANSI ASME SA-182 | Blind Flanges |
| ANSI ASME B16.5 | Blind Flange, BLRTJ, BLFF, RFBL Flange |
| ASME – B 16.36 | Blind flange |
| German Steel Blind Flanges Standard | |
| DIN 2573 / 2576 | Flat Flange for Welding (Blind) |
| DIN 2673 | Loose Flanges and Rings for Welding (Blind Flanges and Plain Collars) |
| DIN PN10, PN16 | PN10 Blind Flanges, DIN PN 10 Blind Flanges, PN16 Blind Flange |
| DIN PN20, PN25 | PN20 Blind Flanges, DIN PN 25 Blind Flanges |
| DIN PN40, PN50 | PN40 Blind Flanges, DIN PN 50 Blind Flanges |
| Japanese Steel Blind Flanges Standard | |
| JIS B2220, B2291 | Blind plate flange |
| JIS 5K, 10K, 30K, 40K, | 5K BLRF Flanges, 10K BLFF Flanges, 30K Blind Flanges, 40K Blind Raised Face Flanges |
| British Standard Blind Flanges Standard | |
| BS 10 Table D | BS 10 Table D Blind Flange |
| BS 10 Table E | BS 10 Table E Blind Flange |
| BS 10 Table F | BS 10 Table F Blind Flange |
| BS 10 Table H | BS 10 Table H Blind Flange |