Blind Flanges  Manufacturers, Traders, Suppliers

Blind Flanges
Dimensions and wall thickness
Blind flanges (acc. ANSI B 16.5) are available from ½“ to 24“ and with a wall thickness of STD/XS/S160/XXS.

Special know-how of special materials
Blind flanges can be ordered for following pressure stages (150/300/600/900/1500/2500 lbs). Our speciality is the supply of special materials.
Technical data
More details, technical data and dimensions can be seen from our data sheet „flanges“ in the download area. Information on special measurements and special designs will be given upon your request.
 
WAZ (acceptance test certificate)
Of course, you may obtain a standard WAZ 3.1 with each delivery. Upon request, we are able to deliver a WAZ 3.2 (normally TÜV or other inspection institutions).

Blind Flange (BL Flange) Overview
A blind flange is a solid disk used to block off a pipeline or create a stop at the end of a piping system. Unlike other flanges, it has no bore (hole) in the center.
Key Features:

• Shape: Round plate with bolt holes but no center opening
• Function: Used to close off the ends of piping, valves, or equipment nozzles
• Pressure Ratings: Available in classes like PN6, PN10, PN16, PN40, ANSI Class 150, 300, 600, etc.

Materials:

• Carbon Steel (e.g., ASTM A105, S235JR, P250GH)
• Stainless Steel (e.g., SS304, SS316)
• Alloy Steel

Standards Available:

• EN 1092-1
• ASME B16.5
• DIN 2527
• JIS B2220

Advantages of Blind Flanges:

• Provides a positive seal under pressure
• Allows easy disassembly for maintenance
• Can be machined with threaded or custom tap holes if needed

Applications of Blind Flanges:

• To isolate a section of the pipe for maintenance or future expansion.

Pressure Testing

• Allows sections of a piping system to be pressurized and tested for leaks.

Temporary or Permanent Closure

• Often used in systems where future connection or expansion is planned.

Oil & Gas Industry

• Used on wellhead systems, manifolds, and process piping where high pressure sealing is critical.

Chemical Plants & Refineries

• Helps in isolating sections for repairs, preventing leaks in high-risk environments.

Power Plants

• Seals high-pressure steam or water systems safely.