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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 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.
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.
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.
Some of the characteristics of a ss blind flange include
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| 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 | 6Bar/ 10Bar/ 16Bar/ 25Bar/ 40Bar |
| DIN Standard | PN6/ PN10/ PN16/ PN25/ PN40/ 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 | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production Technique | Forged/ Heat treated and 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 machine/ UI trasonic flaw detector/ X-ray detector/ Direct-reading Spectrograph/ Magnetic particle detector |
| Flanges Equipment | Pushing Machine/ electric bevelling 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 Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids. |
| Carbon Steel Blind Flange | ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80) |
|---|---|
| Stainless Steel Blind Flange | ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409 |
| Alloy Steel Blind Flange | ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91 |
| Titanium Blind Flange | ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7 ASTM R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 |R56400/GR.5 |
| Copper Blind 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 Blind Flange | ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640 |
| Brass Blind Flange | 3602 / 2604 / H59 / H62 / etc. |
| Inconel Blind Flange | ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 Flanges |
| Hastelloy Blind Flange | ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flanges |
| Monel Blind Flange | ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500) |
| Alloy 20 Blind Flange | ASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3 |
| Aluminium Blind Flange | 5052 /6061/ 6063 / 2017 / 7075 / etc. |
| Nickel Blind Flange | ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC |
| Duplex Blind Flange | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Super Duplex Blind Flange | S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Incoloy Blind Flange | ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flanges |
| 254 Smo Blind Flange | ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547 |
| Nimonic Blind Flange | Nimonic 75, Nimonic 80A, Nimonic 90 |
| Other Blind Flange material | Tin bronze, Alumunum bronze, Lead bronze |
Manufacturer & Supplier Of Stainless Steel Blank Flange, High Hub Blind Flange In India
| 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 |
Blind Raised Face Flanges (BLRF)
| *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 |
| 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 |
| 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.
| 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 |
| STAINLESS STEEL FORGED FLANGES ASTM A 240 GR. F304/F304L SPECTACLE BLIND ASME B16.48 SIZE: 1 1/2 NB X 150# CLASS | 1,738 |
| 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 |
| 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 |
| 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 mm6.35 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 mmEccentricity 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 |
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PED Certified Stainless Steel Blind Flange Manufacturers in India, Dimensions Of Stainless Steel Reducing Blind Flange In MM.
| 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 | Description |
|---|---|
| 73072100 | Stainless Steel Blind Flange |
