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The Introduction About The Blind Flange

Apr 25, 2020

         A Blind flange is round plate which has all of the relevant boltholes but no center hole, and because of this feature this flange is used to close off the ends of a piping systems and pressure vessel openings. It also permits easy access to the interior of a line or vessel once it has been sealed and must be reopened.

         Blind Flanges are commonly used in petrochemical, pipe engineering, public services & water works.

Blind Flanges SPECIFICATION:

Type  Blind Flange (BLRF/BLFF)

Size  ½” (15 NB) to 48″ (1200NB)

Class  150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.

DIN  DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673

BS  BS4504 , BS4504, BS1560, BS10

In Form  SORF, WNRF, BLRF, SWRF, LAP Joint, Threaded, Reducing, Spectacle, etc

Specialize  As per drawing

Standard  ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN, JIS, SABS1123, GOST-12820

Coating/Surface Treatment  Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized

Connection Type  Ring Type Joint, Lap-Joint Face, Raised Face, Flat Face, Large Male-Female, Small Male-Female, Large, Tongue & Groove, Small Tongue & Groove

Flange Face Type  Flat Face (FF), Raise Face (RF), Ring Joint (RJT)

Dimensions  ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings

Packing  No Fumigate or Fumigate Plywood/Wood Pallet or Case

Usage/Applications  Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects etc.

Blind Flanges MATERIAL&GRADES:

Stainless Steel Blind Flange  ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L

Duplex Steel Blind Flange  ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Super Duplex Blind Flange  ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Nickel Alloys 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)

Copper Alloys 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

Alloys Blind Flange  ALLOY 20, ALLOY C, ALLOY C276, ALLOY B2

Low Temperature Steel Blind Flange  ASTM A350 LF2, LF3, LF6

High Yield Blind Flange  ASTM A694 F42, F52, F60, F65, F70

Carbon Steel Blind Flange  ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706

Alloy Steel Blind Flange  ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91