Blind Flange

ASTM A105 BLRF and Stainless Steel 304 Blank Flange manufacturer in India

Flanges are mostly used to connect 2 pipes or to end a pipe. They are made up of different materials. Blind Flange does not have a boring centre, face thickness, and similar bolting pattern. Blind Flange manufacturers in India recommend these flanges to terminate a pipe or a tube. A blank Flange is used to create a seal at the end of the tube to prevent it from leaking. A Carbon Steel Blind Flange provides good resistance to corrosion with the addition of few hydrogenating agents. Rf Blind Flange also provides excellent resistance to acid, corrosion and alkali.  

Blind Flanges

Stainless Steel Blind Flange does not breed bacteria. Neither does it rust nor does it erode. Threaded Blind Flange has a tapered pipe thread that helps it to fit into a similar counterpart thus creating a tight seal. They are used in piping systems where welding can be hazardous. Raised Face Blind Flangeis used to concentrate the surface pressure applied when mating with the flanges. It reduces the surface area of the flange. It has a machine serrated finish. A raised face flange creates a tighter seal when compared to a flat face flange. 

High Hub Blind Flange has a raised face without a hole in the center. It is used to provide closure at the end of the pipe. Flat Face Blind Flange has full contact with the surface and is bolted onto the pipe to close it. It is a type of flange that is supplied without a hub. A105 Blind Flange can handle high stress that is caused by the pressure exerted internally. It helps us to easily repair a system without removing an entire pipe. 316 SS Blind Flange resists crevice corrosion and pitting. It has good welding and forming qualities.

Check Dimensions and pressure clas of EN 1092-2 PN16 Blind Flange & MSS SP-44 Class 150/ 300 Blind Flange, Stainless Steel Reducing Blind Flange manufacturer in India

Blind Flange Specification

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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/ BLRF 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/ BLRF Flanges: ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L

Alloy Steel Blind Flanges/ BLRF Flanges: ASTM A182 F1, F5, F9, F11, F22, F91

Special Alloy Blind Flanges/ BLRF 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

Features of blind flanges

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  • Blind flanges are sometimes supplied with NPT fittings which allow pressure test connections to be fitted.
  • They are used to blank off the ends of pipe.
  • They are also used to blank off the ends of valves and pressure vessel opening.
  • Considering factors like internal pressure and bolt loading, blind flanges, especially in the larger sizes, are the most highly stressed of all types of flanges.
  • Since the maximum stresses in a blind flange are bending stresses at the center, they can safely be allowed to be higher than in other types of flanges.
  • Blind flanges are made to fit standard pipes in all sizes.

Stainless Steel Blind Flanges Pressure

Supplier and exporter of Forged BS 4504/ DIN 86029 PN10 API/ Stainless Steel Blind Flange, and High Hub Blank Flange in Flat / Raised Face connection in India
  • ANSI/ASME B16.5 Blind Flanges 150lb
  • ANSI/ASME B16.5 Blind Flanges 300lb
  • ANSI-ASME B16.5 Blind Flanges 400lb
  • ANSI/ASME B16.5 Blind Flanges 600lb
  • ANSI/ASME B16.5 Blind Flanges 900lb
  • ANSI/ASME B16.5 Blind Flanges 1500lb
  • ANSI/ASME B16.5 Blind Flanges 2500lb