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What is Stainless Steel Blind Flange?
A stainless steel blind flange is a flange designed without a face or a boring center. These flanges are utilized to curtail the hydraulic flow at the ends of tubings or other piping equipment. Blind flanges are versatile components, which can be availed with a flat or a raised face. A blind flange can be directly bolted on the piping equipment allowing room for cleaning and inspection. These flanges can withstand high pressures and corrosive media while managing to form a strong sealing within the system.
ASME B16.5 Blind Flange Uses
ASME B16.5 blind flanges have functions similar to a plug or a cap. These flanges help in terminating the flow of fluids, gases, air by sealing the ends of various piping systems. A blind flange can also act as a barrier to prevent the fluid movement to allow for modifications or repair in the system. Apart from this, they can also be utilized to check the pipe pressure for creating access points within the system.
ASTM A182 F304 Blind Flange vs ASTM A182 F316 Blind Flange
Stainless steel ASTM A182 F304 and ASTM A192 F316 blind flange blind flanges are amongst the grade of blind flanges which are widely utilized in the piping industry. Both these flanges are very identical visually, but there is some basic difference in their chemical composition, which differentiated both these components.
304 blind flanges have a chemical concentration of 18% chromium and 8% nickel. The 316 grade has a chemical concentration of 16% chromium, 10% nickel with 2% of molybdenum. The molybdenum concentration helps these flanges to fight against chloride pitting and makes them suitable for seawater applications. The superior chemical configuration makes the 316 blind flanges costlier than the 304-grade flange.
Differnce Between ANSI B 16.5 Class 600 Blind Flange and class 2500 Blind flange
ANSI B 16.5 Class 600 and class 2500 Blind flanges are differentiated based on their respective pressure classes. Pressure classes in flanges can be termed as the maximum allowable pressure a flange can withstand as the temperature gradually increases. A class 600 blind flange can withstand 890 psi of pressure at 600 degrees F. In the same case, class 2500 blind flange can tolerate 4730 psi of pressure at the same temperatures. The 600 flange is lighter, less robust, and smaller compared to the 2500 class blind flange.
SS Blind Flange Characteristics
Some of the characteristics of a ss blind flange include
Table of Content
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SS Blind Flange Specification
| Specification | Stainless Steel Slip On Flange |
|---|---|
| Face Type | Slip On Raised Face Flanges Slip Blind Flanges Reducing Slip On Flanges Slip On Flat Face Flanges Slip Joint Flanges Slip On Plate Flanges |
| Making Methods | Casting And Forging Rolling And Cutting |
| Size | 1/2”, 2”, 3”, 4”, 6”, 8”, 10”, 12” to 24”. |
| Customized Diameter | Up to 40 Inches |
| Slip On Flange Use | Stainless Steel Slip On Flange are used in applications where the two pipes have to be held together with nuts and bolts. |
| Schedule | SCH 5S, SCH 10, SCH 40, SCH 80, SCH 120, SCH 160, SCH 180 To XXS |
| Manufacturer Length | NPS 1⁄₂" To NPS 48” |
| EN Standard | 10Bar/ 6Bar/ 25Bar/ 16Bar/ 40Bar |
| DIN Standard | PN10/ PN6/ PN16/ PN40/ PN25/ PN64 |
| JIS Standard | 5K/ 10K/ 16K 20K/ 30K/ 40K/ 63K |
| Other Standard | B16.47 Series A & B/ B16.48, BS4504/ GOST |
| UNI Standard | 6 Bar/ 10 Bar/ 16 Bar/ 25 Bar/ 40 Bar |
| Supporting Material | Gasket/ Ring Joint/ Flanges Bolts |
| Test Certificates | Raw Materials Certificate EN 10204/3.1B Third Party Inspection Report, 100% Radiography Test Report etc |
| Production Technique | Forged, Heat treated, machined |
| Manufacturer of | Forged/ Threaded/ Screwed / Plate |
| Manufacturer Pressure Class | Class 150 (lb) up to 24" Class 300 (lb) up to 20" Class 600 (lb) up to 20" Class 900 (lb) up to 16" Class 1500 (lb) up to 10" Class 2500 (lb) up to 8" |
| Flanges Test | Hydrostatic testing / UI trasonic flaw detector/ Direct-reading Spectrograph/ Magnetic particle and X-ray detector |
| Flanges Equipment | electric bevelling machine/ Pushing Machine/ Press machine/ Bending machine/ Sand-blasting machine etc |
| Coating | Anti-rust Paint/ Zinc Plated/ Oil Black Paint/ Yellow Transparent/ Cold and Hot Dip Galvanized |
| Application | Bitumen upgraders oil refineries. Nuclear power acids and Petrochemicals. |
ASTM A182 BLRF Flange Material
| Carbon Steel BLRF Flange | ASME/ASTM A/SA105N A/SA105 & A/SA216-WCB, DIN 1.0460, DIN 1.0402, DIN 1.0619, ASTM A105, Die Steel, ASME SA105, ASTM A350 LF2, A105N, ASME SA350, High Yield CS ASTM A694 (F52 F80 F70 F65 F56 F60) |
|---|---|
| Stainless Steel BLRF Flange | A/SA182 ASME/ASTM F316L F304, F304L, F316,, ASME/ASTM A/SA351 CF8, CF3M, CF8M, CF3, DIN 1.4301,DIN 1.4401, DIN 1.4306, DIN 1.4404, DIN 1.4408, DIN 1.4409, DIN 1.4308, DIN 1.4306 |
| Alloy Steel BLRF Flange | ASME SA182/ ASTM A182 F11, F91 F22, F5, F9, F12, |
| Ti BLRF Flange | ASME SB381, ASTM B381, Ti Grade 1, Ti Grade 4, Ti Grade 2, Ti Grade 5, ASTM R50250/Grade 1 Ti Grade 7 | R50400/Grade 2 | R50700/Grade 4 | R50550/Grade 3 | Grade 6 |R52400/Grade 7 | R56320/Grade 9 | R53400/Grade 12 | R56400/Grade 5 |
| Copper BLRF Flange | C17200, C10700, C10500, C12000,C12200, C33200, TP2, C60800, T2, C11600, TU1, C11300, C68700, C12500, C71520, C11000, C23000, C63020, C44500, C71500, C11400, C10300, C14200, C26000, C14420, C14510, C14520, TP1, T1, C37000, C27400, C70400, C44400, C10200, C70600, C11500, C14500, C28000, C10930, C71000, C27000, C21000, C10800, C12300, TU2, C10400, C10910,C10920, C44300, C14530, C10100, C70620, C71640, C19200, C33000, etc |
| Copper Nickel BLRF Flange | ASME, ASTM SB 61, 151, 152, 62, Copper Nickel 90/10 (C70600 ), UNS C71640, Cupro Nickel 70/30 (C71500) |
| Brass BLRF Flange | 3602, H62 H59, 2604, etc. |
| Inconel BLRF Flange | ASME SB564, ASTM B564, Inconel x750, 690, 783, 625, 718, 600, 601 Flanges |
| Hastelloy BLRF Flange | ASME SB564, ASTM B564, Hastelloy C22 (UNS N06022), C276 (UNS N10276), C2000, C4, B3, B2, X Flanges |
| Monel BLRF Flange | ASME SB564, ASTM B564, Monel 500 (UNS No. N05500), Monel 400 (UNS No. N04400) |
| Alloy 20 BLRF Flange | ASME SB462, ASTM B462, Alloy 20Cb-3 Carpenter® 20 Alloy, |
| Aluminium BLRF Flange | 2017, 5052, 6063, 6061, 7075, etc. |
| Nickel BLRF Flange | ASME SB564, ASTM B564, Nickel 200, Nickel 205, Nickel 201, Nickel 205LC |
| Duplex BLRF Flange | S32205, S31803 A182 Gr F54, F59, F53, F51, F57, F55, F52, F61 F60, |
| Super Duplex BLRF Flange | S32760, S32750 A182 Gr F57, F55, F61 F60, F52, F54, F51, F53, F59, |
| Incoloy BLRF Flange | ASME SB564, ASTM B564, Incoloy 800HT 800, 800H (UNS N08800), 925 Flanges, 825 (UNS N08825) |
| 254 Smo BLRF Flange | ASME SA182, ASTM A182, UNS S31254, SMO 254/6Mo, DIN 1.4547 |
| Nimonic BLRF Flange | Nimonic 80A, Nimonic 75, Nimonic 90 |
| Other BLRF Flange material | Alumunum bronze, Tin bronze, Lead bronze |
Manufacturer & Supplier Of Stainless Steel Blank Flange, High Hub Blind Flange In India
Chemical Composition of Stainless Steel Blank Flange
| Type | C | Mn | P | S | Si | Cr | Ni | Mb |
|---|---|---|---|---|---|---|---|---|
| 302 | 0.15 | 2.00 | 0.045 | 0.030 | 1.00 | 17.00/19.00 | 8.00/10.00 | – |
| 304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.00/20.00 | 8.00/10.50 | – |
| 304L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 18.00/20.00 | 8.00/12.00 | – |
| 309 | 0.20 | 2.00 | 0.045 | 0.030 | 1.00 | 22.00/24.00 | 12.00/15.00 | – |
| 309S | 0.08 | 2.00 | 0.045 | – | 1.00 | 22.00/24.00 | – | – |
| 310 | 0.25 | 2.00 | 0.045 | 0.030 | 1.5 | 24.00/26.00 | 19.00/22.00 | – |
| 310S | 0.08 | 2.00 | 0.045 | 0.030 | 1.5 | 24.00/26.00 | 19.00/22.00 | – |
| 316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.00/18.00 | 10.00/14.00 | 2.00/3.00 |
| 316L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 16.00/18.00 | 10.00/14.00 | 2.00/3.00 |
| 317 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00/1.00 | 18.00/20.00 | 11.00/15.00 | 3.00/4.00 |
| 317L | 0.03 | 2.00 | 0.045 | 0.030 | 0.75 | 18.00/20.00 | 11.00/15.00 | 3.00/4.00 |
| 321 | 0.08 | 2.00 | 0.040 | 0.030 | 1.00 | 17.00/19.00 | 9.00/12.00 | 0.75/0.75 |
| 347 | 0.08 | 2.00 | 0.040 | 0.030 | 0.5/1.00 | 17.00/19.00 | 9.00/12.00 | 0.5/0.75 |
BLRF Flange Full Form
Blind Raised Face Flanges (BLRF)
Test Certificate Of SS Blind Flange
Stainless Steel Threaded Blind Flange Documentation
ASME B16.5 Tapped Blind Flange Dimensions
| *Size | *T |
|---|---|
| 3/8" | 10.5 |
| 1/2" | 13.5 |
| 3/4" | 14.0 |
| 1" | 17.5 |
| 1-1/4" | 18.1 |
| 1-1/2" | 18.3 |
| 2" | 19.4 |
Dimensions of Pn16 Blank Flange
| DIN 2527 PN16 BLIND FLANGE | |||||||
| Rated Diameter | Flange | Screws | Weight (7,85 Kg/dm3) | ||||
| D | b | k | Number | Thread | d2 | Shape B | |
| Kg | |||||||
| 15 | 95 | 14 | 65 | 4 | M 12 | 14 | 0,72 |
| 20 | 105 | 16 | 75 | 1,01 | |||
| 25 | 115 | 16 | 85 | 1,23 | |||
| 32 | 140 | 16 | 100 | M 16 | 18 | 1,8 | |
| 40 | 150 | 16 | 110 | 2,09 | |||
| 50 | 165 | 18 | 125 | 2,88 | |||
| 65 | 185 | 18 | 145 | 3,66 | |||
| 80 | 200 | 20 | 160 | 8 | 4,77 | ||
| 100 | 220 | 20 | 180 | 5,65 | |||
| 125 | 250 | 22 | 210 | 8,42 | |||
| 150 | 285 | 22 | 240 | M 20 | 22 | 10,4 | |
| 200 | 340 | 24 | 295 | 12 | 16,1 | ||
| 250 | 405 | 26 | 355 | M 24 | 26 | 24,9 | |
| 300 | 460 | 28 | 410 | 35,1 | |||
| 350 | 520 | 30 | 470 | 16 | 47,8 | ||
| 400 | 580 | 32 | 525 | M 27 | 30 | 63,5 | |
| 500 | 715 | 36 | 650 | 20 | M 30 | 33 | 102 |
Stainless Steel Blind Flange Prices
| Type | UNS | Tensile (ksi) min | Yield (ksi) min | Elongation min | Hardness (Brinell) max | Hardness (Rockwell B) max |
|---|---|---|---|---|---|---|
| 302 | S30200 | 75 | 30 | 40% in 2″ | 183 | 88 |
| 304 | S30400 | 75 | 30 | 40% in 2″ | 183 | 88 |
| 304L | S30403 | 70 | 30 | 40% in 2″ | 183 | 88 |
| 309 | S30900 | 75 | 30 | 40% in 2″ | 217 | 95 |
| 309S | S30908 | 75 | 30 | 40% in 2″ | 217 | 95 |
| 310 | S31000 | 75 | 30 | 40% in 2″ | 217 | 95 |
| 310S | S31008 | 75 | 30 | 40% in 2″ | 217 | 95 |
| 316 | S31600 | 75 | 30 | 40% in 2″ | 217 | 95 |
| 316L | S31603 | 70 | 25 | 35% in 2″ | 217 | 95 |
| 317 | S31700 | 75 | 30 | 35% in 2″ | 217 | 95 |
| 317L | S31703 | 75 | 30 | 35% in 2″ | 217 | 95 |
| 321 | S32100 | 75 | 30 | 40% in 2″ | 183 | 88 |
| 347 | S34700 | 75 | 30 | 40% in 2″ | 183 | 88 |
Well-known Blind Flange manufacturer in India. For final Stainless Steel Flat Face Blind Flange Price List Please Call on +91 22 6636 3099.
Packaging of Stainless Steel Raised Face Blind Flange
| Description | Per Unit (INR) |
|---|---|
| STAINLESS STEEL FLANGES 50 NB 150# BLIND RF | 561 |
| STAINLESS STEEL FLANGES 150 NB 150 # BLIND RF | 2,491 |
| STAINLESS STEEL FLANGES 80 NB 150# BLIND RF | 1,015 |
| STAINLESS STEEL FLANGES 100 NB 150 # BLIND RF | 1,473 |
| STAINLESS STEEL FLANGES 25 NB 150# BLIND RF | 247 |
| FLANGE SORF,BLIND 50NB CL150 SA105M | 1,961 |
| SS FORGED FLANGES ASTM A 240 GR. F304L/F304 SPECTACLE BLIND ASME B16.48 SIZE: 1 1/2 Nominal Bore X 150# CLASS | 1,739 |
SS Class 300 Blind Flange Mechanical Properties
Equivalent of Stainless Steel Flat Face Blind Flange
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18‐09 | X5CrNi18-10 |
| SS 304L | 1.4306 / 1.4307 | S30403 | SUS 304L | 3304S11 | 03Х18Н11 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 |
| SS 304H | 1.4301 | S30409 | – | – | – | – | – |
| SS 310 | 1.4841 | S31000 | SUS 310 | 310S24 | 20Ch25N20S2 | – | X15CrNi25-20 |
| SS 310S | 1.4845 | S31008 | SUS 310S | 310S16 | 20Ch23N18 | – | X8CrNi25-21 |
| SS 316 | 1.4401 / 1.4436 | S31600 | SUS 316 | 316S31 / 316S33 | – | Z7CND17‐11‐02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
| SS 316L | 1.4404 / 1.4435 | S31603 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
| SS 316Ti | 1.4571 | S31635 | SUS 316Ti | 320S31 | 08Ch17N13M2T | Z6CNDT17‐123 | X6CrNiMoTi17-12-2 |
| SS 317 | 1.4449 | S31700 | SUS 317 | – | – | – | – |
| SS 317L | 1.4438 | S31703 | SUS 317L | – | – | – | X2CrNiMo18-15-4 |
| SS 321 | 1.4541 | S32100 | SUS 321 | – | – | – | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | – | – | – | X12CrNiTi18-9 |
| SS 347 | 1.4550 | S34700 | SUS 347 | – | 08Ch18N12B | – | X6CrNiNb18-10 |
| SS 410 | 1.4006 | S41000 | SUS 410 | 410S21 | – | – | X12Cr13 |
| SS 446 | 1.4762 | S44600 | – | – | – | – | – |
| SS 904L | 1.4539 | N08904 | SUS 904L | 904S13 | STS 317J5 | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
SS 304 Blind Flange Grade
Value Added Services of Blind Flange With Threaded Hole
Stainless Steel Blind Flange Dimensions
Class 150 Blind Flange Dimensions
| NPS (Normal Pipe Sizes) | "A" (O.D.) Outside Daimeter | "B" (Thickness) | "C" (RF Daimeter) | "D" (B.C.D.) | # Bolt Holes | Daimeter of Bolt Holes | Approx. Weight In Kg |
|---|---|---|---|---|---|---|---|
| 1/2" | 3-1/2 | 7/16 | 1-3/8 | 2-3/8 | 4 | 5/8 | 2 |
| 3/4" | 3-7/8 | 1/2 | 1-11/16 | 2-3/4 | 4 | 5/8 | 2 |
| 1" | 4-1/4 | 9/16 | 2 | 3-1/8 | 4 | 5/8 | 2 |
| 1-1/4" | 4-5/8 | 5/8 | 2-1/2 | 3-1/2 | 4 | 5/8 | 3 |
| 1-1/2" | 5 | 11/16 | 2-7/8 | 3-7/8 | 4 | 5/8 | 3 |
| 2" | 6 | 3/4 | 3-5/8 | 4-3/4 | 4 | 3/4 | 4 |
| 2-1/2" | 7 | 7/8 | 4-1/8 | 5-1/2 | 4 | 3/4 | 7 |
| 3" | 7-1/2 | 15/16 | 5 | 6 | 4 | 3/4 | 9 |
| 3-1/2" | 8-1/2 | 15/16 | 5-1/2 | 7 | 8 | 3/4 | 13 |
| 4" | 9 | 15/16 | 6-3/16 | 7-1/2 | 8 | 3/4 | 17 |
| 5" | 10 | 15/16 | 7-5/16 | 8-1/2 | 8 | 7/8 | 20 |
| 6" | 11 | 1 | 8-1/2 | 9-1/2 | 8 | 7/8 | 27 |
| 8" | 13-1/2 | 1-1/8 | 10-5/8 | 11-3/4 | 8 | 7/8 | 47 |
| 10" | 16 | 1-3/16 | 12-3/4 | 14-1/4 | 12 | 1 | 67 |
| 12" | 19 | 1-1/4 | 15 | 17 | 12 | 1 | 123 |
| 14" | 21 | 1-3/8 | 16-1/4 | 18-3/4 | 12 | 1-1/8 | 139 |
| 16" | 23-1/2 | 1-7/16 | 18-1/2 | 21-1/4 | 16 | 1-1/8 | 187 |
| 18" | 25 | 1-9/16 | 21 | 22-3/4 | 16 | 1-1/4 | 217 |
| 20" | 27-1/2 | 1-11/16 | 23 | 25 | 20 | 1-1/4 | 283 |
| 24" | 32 | 1-7/8 | 27-1/4 | 29-1/2 | 20 | 1-3/8 | 415 |
Stainless Steel Reducing Blind Flange Tolerance Chart
| Outside Dia ≤ 24=1.6 milimeter | > 24=± 3.2 milimeter | Inside Dia not applicable |
| Dia of Contact Face 1.6 milimeter Raised Face=± 0.8 milimeter6.35 milimeter Raised Face, Tongue & Groove / Male-Female=± 0.4 milimeter | Outside Dia of Hub ≤ 12=+ 2.4 milimeter / – 1.6 milimeter | ≥ 14=± 3.2 milimeter |
| Dia of Counterbore not applicable | Drilling Bolt Circle=1.6 milimeter | Bolt Hole Spacing=± 0.8 milimeterEccentricity of Bolt Circle with Respect to Facing≤ 2½=0.8 milimeter max. | ≥ 3=1.6 milimeter max. |
| Thickness ≤ 18=+ 3.2 milimeter / – 0 | ≥ 20=+ 4.8 milimeter / – 0 | Length thru Hub ≤ 18=+ 3.2 milimeter / – 0.8 milimeter | ≥ 20=+ 4.8 milimeter / – 1.6 milimeter |
Buy Ductile Iron Blind Flange Directly From Largest Manufacturers In Mumbai, Check Weight Chart Of SAE Blind Flange
Other Materials Of Blind Flange
PED Certified Stainless Steel Blind Flange Manufacturers in India, Dimensions Of Stainless Steel Reducing Blind Flange In MM.
ASTM A182 SS Blind Flange Types
Blind Flange Facing Types
| Type A: flat face | Type D: groove face | Type G: O Ring recess |
| Type B: raised face | Type E: spigot | Type H: O Ring groove |
| Type C: tongue face | Type F: recess |
Flange facing types C, D, E, F, G and H are not used for PN 2,5 and PN 6.
Flange facing types G and H are only used for PN 10 to PN 40.
Check Hscode Of Pn16 Blank Flange and Blind Flange manufacturers in India In Mumbai, India.
HS Code For SS Blind Flange
| HS Code | Description |
|---|---|
| 73072100 | Stainless Steel Blind Flange |
SP Metals Is Prominent Stainless Steel Blind Flanges Suppliers In South And North America, Europe And West Africa:
Stainless Steel Threaded Blind Flange
ASTM A182 Blank Flange
SS Rf Blind Flange
Stainless Raised Face Blind Flange