Cromwell Distribution is a Dominant and Expert Stockist of high quality ASME/ANSI/DIN industrial blind flanges . We offer immediate delivery programs for standard size of carbon steel blind flanges and stainless steel blind flanges. Blind blind flanges in special stainless steel grades, nickel alloy and alloy steel can be supplied with just in time programs.
Commonly referred as blanking flanges, Blind pipe flanges are widely used in high pressure applications. Blind flanges are generally used to seal the end of a piping system to prevent flow of liquids or gases. The use of blind flanges allows ease of access to a piping system once it has been closed.
Our blind flanges are available with raised or RTJ faces and also with female threads. Blind flanges can be supplied with or without hub as per the customer requirements. We offer blind Blind flanges at our facility to companies in various industries including shipbuilding, power generation, petrochemical plants, oil refineries, waste water treatment plants, paper mills, pharmaceutical plants and turnkey projects among others.
A blind flanges is a solid flange as shown in above Picture. The purpose of these is to block off a section of pipe or a nozzle on a vessel that is not used. (A nozzle is typically a pipe coming out of a vessel and is usually flanged so it can be connected to valves or piping).
|Size||1/2″ (15 NB) to 48″ (1200NB)|
|Standards||ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings|
|Pressure Ratings||Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.|
|Carbon Steel Blind Flanges||ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8|
|Stainless Steel Blind Flanges||ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Blind Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
|Special Alloy Blind Flanges||Duplex, Super Duplex, Nickel Alloys|
|Flange Face Type||Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)|
|Coating/Surface Treatment||Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized|
|Value Added Services||CNC Machining, Customised Flanges|
ASME: ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN, JIS, SABS1123, GOST-12820
DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
EN: EN10253-1, EN10253-2
|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|
|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|
|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|
|Diameter – L||15.9||15.9||15.9||15.9||22.2||22.2||22.2|
|Stud Bolts Diameter x Length|
≤ 24 = 1.6 mm | > 24 = ± 3.2 mm
Within Limits on Boring Gauge
|Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm
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.
|Outside Diameter of Hub
≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm
|Diameter of Counterbore
Same as forInside Diameter
≤ 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
Products are packaged to ensure that there is no damage during transit. packaging is done in wooden cases. All Blind Flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.
At Cromwell Distribution, all flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.