Dhanratan Steel Industries is one of the leading blind flange suppliers in United States, offering a variety of spectacle blind flanges, tapped blind flanges, and RTJ blind flanges. Pipeline systems cannot be complete without blind flanges, these are used to close the end of a pipe or a valve opening to have a leak-tight seal. Our products are available in different sizes and materials such as stainless steel blind flanges, due to their high durability and resistance to corrosion.
We are Most Reliable and PED Certified Stockists, Manufacturers, and Exporters of ASME B16.47/ANSI B16.5 BLRF Flange, MSS SP-44 Blind Flange, DIN86029 PN10 Blind Flange, Series A & B Blind Flange, Stainless Steel Blind Flange, Carbon Steel Blind Flange manufacturer USA
We have blind flanges in various specifications to meet the needs of industries such as oil and gas, petrochemicals and power plants. There are many sizes of blind flanges, depending on the diameter of the pipeline, and thus, they are suitable for your applications. We ensure that all the products we offer are tested and checked for quality before being shipped out to the market and we also conform to ASME, ANSI and ISO certifications. This ensures that stainless steel blind flanges and other products meet the safety and performance standards.
All our products are tested before they are released to the market, and we meet international standards like ASTM, ASME and ISO, among others. We understand the importance of working with high-quality, reliable tools and materials. Our goal is to offer the best products to customers and guarantee that all products are safe and reliable in every project.
We keep huge preminum quality product stock of Class 150 Blind Flat Faced Flange, Raised Face Blind Flange, Blind Forged Flange, Blind Plate Flange, Class 300, 600, 900, 1500 Blind Flange. Get here at Market Leading Prices in United States.
We also ensure that our products are affordable and delivered on time to customers in the United States. Whether you require a typical tapped blind flange or an RTJ blind flange of special dimensions, we guarantee an efficient purchasing process backed up by our team and supply chain. These blind flanges are used in many different industries.
Specifications of Blind Flange in USA
| Dimensions | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
| Size | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ). |
| Class/Pressure | 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc. |
| DIN | DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636,DIN 2637, DIN 2638, DIN 2673 |
| BS | BS 4504 , BS 4504, BS 1560, BS 10 |
| PN | PN6, PN10, PN16, PN25, PN40 |
Material & Grades of Blind Flange in USA
Stainless Steel Blind Flange : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L Blind Flange
Duplex & Super Duplex Steel Blind Flange : ASTM A182 / ASME SA182 F44, F 45, F51, F 53, F 55, F 60, F 61 Blind Flange
Carbon Steel Blind Flange : ASTM A105 / ASME SA105 ASTM / ASME A 350 , ASTM A181 LF2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706 Blind Flange
Low Temperature Carbon Steel Blind Flange: ASTM A350, LF2, LF3 Blind Flange
Alloy Steel Blind Flange : ASTM A182 / ASME SA182 & A387 F1, F5, F9, F11, F12, F22, F91 Blind Flange
Copper Alloy Steel Blind Flange : 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
Nickel Alloy Blind Flange : 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) Blind Flange
ANSI B16.5 Blind Flange Weight in USA
ASME/ANSI B16.5 150lb Blind Flange Weight
| Pipe Normal Diam. | O.D. Flange | Thk. Of Flange Min | Diameter of Raised Face | Diam.of BoltCircle | Diam.of BoltHoles | Numberof Bolts | Diam. ofBolts(inch) | KG | LB | |
| inch | dn | O | C | G | BC | BH | BN | BD | – | – |
| 1/2″ | 15 | 89.00 | 11.20 | 35.10 | 60.50 | 15.80 | 4 | 1/2″ | 0.5 | 1.1 |
| 3/4″ | 20 | 98.50 | 12.70 | 42.90 | 69.90 | 15.80 | 4 | 1/2″ | 0.8 | 1.8 |
| 1″ | 25 | 108.00 | 14.20 | 50.80 | 79.30 | 15.80 | 4 | 1/2″ | 0.9 | 2 |
| 1-1/4″ | 32 | 117.50 | 15.70 | 63.50 | 88.90 | 15.80 | 4 | 1/2″ | 1.3 | 2.9 |
| 1-1/2″ | 40 | 127.00 | 17.50 | 73.20 | 98.60 | 15.80 | 4 | 1/2″ | 1.6 | 3.5 |
| 2″ | 50 | 152.50 | 19.10 | 91.90 | 120.70 | 19.10 | 4 | 5/8″ | 2.6 | 5.7 |
| 2-1/2″ | 65 | 178.00 | 22.40 | 104.60 | 139.70 | 19.10 | 4 | 5/8″ | 4.1 | 9 |
| 3″ | 80 | 190.50 | 23.90 | 127.00 | 152.40 | 19.10 | 4 | 5/8″ | 5..1 | 11.2 |
| 3-1/2″ | 90 | 216.00 | 23.90 | 139.70 | 177.80 | 19.10 | 8 | 5/8″ | 6.5 | 14.3 |
| 4″ | 100 | 228.50 | 23.90 | 157.20 | 190.50 | 19.10 | 8 | 5/8″ | 7.5 | 16.5 |
| 5″ | 125 | 254.00 | 23.90 | 185.70 | 215.90 | 22.40 | 8 | 3/4″ | 9.2 | 20.3 |
| 6″ | 150 | 279.50 | 25.40 | 215.90 | 241.30 | 22.40 | 8 | 3/4″ | 11.8 | 26 |
| 8″ | 200 | 343.00 | 28.40 | 269.70 | 298.50 | 22.40 | 8 | 3/4″ | 20.4 | 45 |
| 10″ | 250 | 406.50 | 30.20 | 323.90 | 362.00 | 25.40 | 12 | 7/8″ | 31 | 68 |
| 12″ | 300 | 482.50 | 31.80 | 381.00 | 431.80 | 25.40 | 12 | 7/8″ | 47 | 103 |
| 14″ | 350 | 533.50 | 35.10 | 412.80 | 476.30 | 28.50 | 12 | 1″ | 60 | 132 |
| 16″ | 400 | 597.00 | 36.60 | 469.90 | 539.80 | 28.50 | 16 | 1″ | 81 | 178 |
| 18″ | 450 | 635.00 | 39.60 | 533.40 | 577.90 | 31.80 | 16 | 1 1/8″ | 93 | 205 |
| 20″ | 500 | 698.50 | 42.90 | 584.20 | 635.00 | 31.80 | 20 | 1 1/8″ | 127 | 280 |
| 24″ | 600 | 813.00 | 47.80 | 692.20 | 749.30 | 35.10 | 20 | 1 1/4″ | 190 | 419 |
ASME/ANSI B16.5 300lb Blind Flange Weight
| Pipe Normal Diam. | Approx. Weight | O.D. Flange | Thk. Of Flange Min | Diameter of Raised Face | Diam.of BoltCircle | Diam.of BoltHoles | Numberof Bolts | Diam. ofBolts(inch) | ||
| inch | dn | KG/PCS | LB/PCS | O | C | G | BC | BH | BN | BD |
| 1″ | 25 | 1.5 | 3.3 | 124. 0 | 17.5 | 50.8 | 88.9 | 19.1 | 4 | 5/8″ |
| 1-1/4″ | 32 | 2 | 4.4 | 133. 5 | 19.1 | 63.5 | 98.6 | 19.1 | 4 | 5/8″ |
| 1-1/2″ | 40 | 2.9 | 6.4 | 155. 5 | 20.6 | 73.2 | 114.3 | 22.4 | 4 | 5/8″ |
| 2″ | 50 | 3.5 | 7.7 | 165. 0 | 22.4 | 91.9 | 127 | 19.1 | 8 | 5/8″ |
| 2-1/2″ | 65 | 5.3 | 11.7 | 190. 5 | 25.4 | 104.6 | 149.4 | 22.4 | 8 | 3/4″ |
| 1/2″ | 15 | 0.8 | 1.8 | 95.5 | 14.2 | 35.1 | 66.5 | 15.7 | 4 | 1/2″ |
| 14″ | 350 | 108 | 238 | 584. 0 | 53.8 | 412.8 | 514..4 | 31.8 | 20 | 1 1/8″ |
| 16″ | 400 | 139 | 306 | 647. 5 | 57.2 | 469.9 | 571.5 | 35.1 | 20 | 1 1/4″ |
| 18″ | 450 | 178 | 392 | 711. 0 | 60.5 | 533.4 | 628.7 | 35.1 | 24 | 1 1/4″ |
| 3/4″ | 20 | 1.2 | 2.6 | 117. 5 | 15.7 | 42.9 | 82.6 | 19.1 | 4 | 5/8″ |
| 3″ | 80 | 7.2 | 15.9 | 209. 5 | 28.4 | 127 | 168.1 | 22.4 | 8 | 3/4″ |
| 3-1/2″ | 90 | 9.2 | 20.3 | 228. 5 | 30.2 | 139.7 | 184.2 | 22.4 | 8 | 3/4″ |
| 4″ | 100 | 12.2 | 26.8 | 254. 0 | 31.8 | 157.2 | 200.2 | 22.4 | 8 | 3/4″ |
| 5″ | 125 | 16 | 35.2 | 279. 5 | 35.1 | 185.7 | 235 | 22.4 | 8 | 3/4″ |
| 6″ | 150 | 22 | 48.4 | 317. 5 | 36.6 | 215.9 | 269.7 | 22.4 | 12 | 3/4″ |
| 8″ | 200 | 36 | 79.5 | 381. 0 | 41.1 | 269.7 | 330.2 | 25.4 | 12 | 7/8″ |
| 10″ | 250 | 55 | 121 | 444. 5 | 47.8 | 323.9 | 387.4 | 28.4 | 16 | 1″ |
| 12″ | 300 | 82.5 | 182 | 520. 5 | 50.8 | 381 | 450.9 | 31.8 | 16 | 1 1/8″ |
| 20″ | 500 | 228 | 503 | 774. 5 | 63.5 | 584.2 | 685.8 | 35.1 | 24 | 1 1/4″ |
| 24″ | 600 | 350 | 772 | 914. 5 | 69.9 | 692.2 | 812.8 | 41.1 | 24 | 1 1/2″ |
ASME/ANSI B16.5 600lb Blind Flange Weight
| Pipe Normal Diam. | O.D. Flange | Thk. Of Flange Min | Diameter of Raised Face | Diam.of BoltCircle | Diam.of BoltHoles | Numberof Bolts | Diam. ofBolts(inch) | Approx. Weight | ||
| inch | dn | O | C | G | BC | BH | BN | BD | KG/PCS | LB/PCS |
| 1″ | 25 | 124. 0 | 17.5 | 50.8 | 88.9 | 19.1 | 4 | 5/8″ | 1.7 | 3.7 |
| 1-1/4″ | 32 | 133. 5 | 20.6 | 63.5 | 98.6 | 19.1 | 4 | 5/8″ | 2.4 | 5.3 |
| 1-1/2″ | 40 | 155. 5 | 22.4 | 73.2 | 114.3 | 22.4 | 4 | 3/4″ | 3.4 | 7.5 |
| 2″ | 50 | 165. 0 | 25.4 | 91.9 | 127 | 19.1 | 8 | 5/8″ | 4.4 | 9.7 |
| 2-1/2″ | 65 | 190. 5 | 28.4 | 104.6 | 149.4 | 22.4 | 8 | 3/4″ | 6.8 | 15 |
| 3″ | 80 | 209. 5 | 31.8 | 127 | 168.1 | 22.4 | 8 | 3/4″ | 8.9 | 19.7 |
| 3-1/2″ | 90 | 228. 5 | 35.1 | 139.7 | 184.2 | 25.4 | 8 | 7/8″ | 12.7 | 28 |
| 4″ | 100 | 273. 0 | 38.1 | 157.2 | 215.9 | 25.4 | 8 | 7/8″ | 18.6 | 41 |
| 1/2″ | 15 | 95.5 | 14.2 | 35.1 | 66.5 | 15.7 | 4 | 1/2″ | 0.8 | 1.8 |
| 3/4″ | 20 | 117. 5 | 15.7 | 42.9 | 82.6 | 19.1 | 4 | 5/8″ | 1.4 | 3.1 |
| 14″ | 350 | 603. 5 | 69.9 | 412.8 | 527.1 | 38.1 | 20 | 1 3/8″ | 158 | 348 |
| 16″ | 400 | 686. 0 | 76.2 | 469.9 | 603.3 | 41.1 | 20 | 1 1/2″ | 225 | 496 |
| 18″ | 450 | 743. 0 | 82.6 | 533.4 | 654.1 | 44.5 | 20 | 1 5/8″ | 285 | 628 |
| 20″ | 500 | 813. 0 | 88.9 | 584.2 | 723.9 | 44.5 | 24 | 1 5/8″ | 365 | 805 |
| 24″ | 600 | 940. 0 | 101.6 | 692.2 | 838.2 | 50.8 | 24 | 1 7/8″ | 532 | 1170 |
| 5″ | 125 | 330. 0 | 44.5 | 185.7 | 266.7 | 28.4 | 8 | 1″ | 30.8 | 68 |
| 6″ | 150 | 355. 5 | 47.8 | 215.9 | 292.1 | 28.4 | 12 | 1″ | 38 | 83.6 |
| 8″ | 200 | 419. 0 | 55.6 | 269.7 | 349.3 | 31.8 | 12 | 1 1/8″ | 62.2 | 137 |
| 10″ | 250 | 508. 0 | 63.5 | 323.9 | 431.8 | 35.1 | 16 | 1 1/4″ | 102 | 225 |
| 12″ | 300 | 559. 0 | 66.5 | 381 | 489 | 35.1 | 20 | 1 1/4″ | 132 | 291 |
ASME/ANSI B16.5 1500lb Blind Flange Weight
| Pipe Normal Diam. | O.D. Flange | Thk. Of Flange Min | Diam.ofHub | Diam.of BoltCircle | Diam.of BoltHoles | Numberof Bolts | Diam. ofBolts(inch) | Approx. Weight | ||
| inch | dn | O | C | X | BC | BH | BN | BD | KG/PCS | LB/PCS |
| 1″ | 25 | 149.4 | 28.4 | 52.3 | 101.6 | 25.4 | 4 | 7/8″ | 3.7 | 8.1 |
| 1-1/4″ | 32 | 158.8 | 28.4 | 63.5 | 111.3 | 25.4 | 4 | 7/8″ | 4.3 | 9.5 |
| 1-1/2″ | 40 | 177.8 | 31.8 | 69.9 | 124 | 28.4 | 4 | 1″ | 5.9 | 13 |
| 2″ | 50 | 215.9 | 38.1 | 104.6 | 165.1 | 25.4 | 8 | 7/8″ | 11.3 | 24.9 |
| 1/2″ | 15 | 120.7 | 22.4 | 38.1 | 82.6 | 22.4 | 4 | 3/4″ | 1.9 | 4.2 |
| 3/4″ | 20 | 130 | 25.4 | 44.5 | 88.9 | 22.4 | 4 | 3/4″ | 2.7 | 6 |
| 2-1/2″ | 65 | 244.3 | 41.1 | 124 | 190.5 | 28.4 | 8 | 1″ | 16 | 35.2 |
| 3″ | 80 | 266.7 | 47.8 | 133.4 | 190.5 | 25.4 | 8 | 7/8″ | 19.5 | 43 |
| 8″ | 200 | 482.6 | 91.9 | 292.1 | 393.7 | 38.1 | 12 | 1 3/8″ | 125 | 275 |
| 10″ | 250 | 584.2 | 108 | 368.3 | 469.9 | 38.1 | 16 | 1 3/8″ | 215 | 474 |
| 12″ | 300 | 673.1 | 124 | 450.9 | 533.4 | 38.1 | 20 | 1 3/8″ | 316 | 697 |
| 4″ | 100 | 311.2 | 53.8 | 162.1 | 235 | 31.8 | 8 | 1 1/8″ | 33 | 72.8 |
| 5″ | 125 | 374.7 | 73.2 | 196.9 | 279.4 | 35.1 | 8 | 1 1/4″ | 60 | 132 |
| 6″ | 150 | 393.7 | 82.6 | 228.6 | 317.5 | 31.8 | 12 | 1 1/8″ | 75 | 165 |
| 18″ | 450 | 914.4 | 162.1 | 596.9 | 685.8 | 50.8 | 20 | 1 7/8″ | ||
| 20″ | 500 | 984.3 | 177.8 | 641.4 | 749.3 | 53.8 | 20 | 2″ | ||
| 14″ | 350 | 749.3 | 133.4 | 495.3 | 558.8 | 41.1 | 20 | 1 1/2″ | ||
| 16″ | 400 | 825.5 | 146.1 | 552.5 | 616 | 44.5 | 20 | 1 5/8″ | ||
| 24″ | 600 | 1168.4 | 203.2 | 762 | 901.7 | 66.5 | 20 | 2 1/2″ | ||
ASME/ANSI B16.5 2500lb Blind Flange Weight
| Pipe Normal Diam. | O.D. Flange | Thk. Of Flange Min | Diam.of BoltCircle | Diam.of BoltHoles | Numberof Bolts | Diam. ofBolts(inch) | KG | LB | |
|---|---|---|---|---|---|---|---|---|---|
| inch | dn | O | C | BC | BH | BN | BD | ||
| 1″ | 25 | 158.8 | 35.1 | 108 | 25.4 | 4 | 7/8″ | 5 | 12 |
| 1-1/4″ | 32 | 184.2 | 38.1 | 130 | 28.4 | 4 | 1″ | 8 | 18 |
| 1-1/2″ | 40 | 203.2 | 44.5 | 146.1 | 31.8 | 4 | 1 1/8″ | 11 | 25 |
| 1/2″ | 15 | 133.4 | 30.2 | 88.9 | 22.4 | 4 | 3/4″ | 3 | 7 |
| 3″ | 80 | 304.8 | 66.5 | 228.6 | 35.1 | 8 | 1 1/4″ | 39 | 86 |
| 4″ | 100 | 355.6 | 76.2 | 273.1 | 41.1 | 8 | 1 1/2″ | 60 | 133 |
| 5″ | 125 | 419.1 | 91.9 | 323.9 | 47.8 | 8 | 1 3/4″ | 101 | 223 |
| 3/4″ | 20 | 139.7 | 31.8 | 95.3 | 22.4 | 4 | 3/4″ | 4.5 | 10 |
| 8″ | 200 | 552.5 | 127 | 438.2 | 53.8 | 12 | 2″ | 242 | 533 |
| 10″ | 250 | 673.1 | 165.1 | 539.8 | 66.5 | 12 | 2 1/2″ | 465 | 1023 |
| 12″ | 300 | 762 | 184.2 | 619.3 | 73.2 | 12 | 2 3/4″ | 665 | 1463 |
| 2″ | 50 | 235 | 50.8 | 171.5 | 28.4 | 8 | 1″ | 17 | 38 |
| 2-1/2″ | 65 | 266.7 | 57.2 | 196.9 | 31.8 | 8 | 1 1/8″ | 25 | 55 |
| 6″ | 150 | 482.6 | 108 | 368.3 | 53.8 | 8 | 2″ | 156 | 345 |
Blind Flanges Dimensions Tolerance
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 |
ASTM / ASME / AISI Blind Flanges Weight Chart in USA
| CLASS | Nominal Pipe Size | Slip-On | 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 |
Materials of Blind Flanges in USA
Stainless Steel Blind Flanges in USA
Alloy Steel Blind Flanges in USA
Carbon Steel Blind Flanges in USA
Duplex Steel Blind Flanges in USA
Super Duplex Steel Blind Flanges in USA
Nickel Alloy Blind Flanges in USA
Blind Flange Industrial Application in USA
- Industrial Boilers Industry
- Power Plants Industry
- Nuclear Plants Industry
- Oil & Gas Industry
- Refineries Industry
- Ship Building Industry
- Heat Exchanger Industry
- Condensers Industry
- Paper & Pulp Industry
- Marine Applications
- Nuclear Power Industry
- Fossil Fuel Power Plants Industry
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