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Wuliyao Industry Zone, Yanshan County,
Tel: 86-180-03119682
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Carbon Stee Blind Flange
Model: blind flange
Category: Machinery Parts and Components / Piping Systems (Pipes, Valves, Fittings) / Flanges
Characteristics
Size:
1/2″ (15mm) NB TO 24″ (600mm) NB (ABOVE 24″ NB MAKE TO ORDER BASIS)
Nominal Pressure Range: 150# – 2500#
Schedule: 5S, 10S, 10, 20, 40S, 40, STD, 60, 80S, 80, XS, 100, 120, 140, 160, and XXS
Face Type: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Grades Available:
CARBON STEEL: ASTM A 105, LF 2, LF 3
ALLOY STEEL: ASTM A182 GR. F1, F 5, F 9, F 11, F 22, F 91
STAINLESS STEEL: ASTM A182 GR. 304/304L, 316/316L, 310, 347, 321, 904L
Flange Standards:
ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Specifications
Specification of Carbon Steel Blind Flanges
| Specifications | ASTM A105 / ASME SA105, A105N |
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
What is a blind flange?
The blind flange is a plate that attaches to a pipe end to block off the pipeline and provides easy access for cleaning, inspection, and modification. They have the same function with pipe plugs and caps, but it is detachable. It is connected to a flange or flange fittings by bolting with a gasket between them to provide a seal. And should be placed where isolation is needed, such as the nozzle of a device, before or after a shut-off valve, or between two flanges.
Carbon Steel Flanges are made up of different types of carbon steel. They come in different grades with different material compositions. All of them have high wear and tear and high toughness.
We provide Carbon steel pipe flange that comes in ASTM A105, A350 LF2, A694 F2, F46, and many other specifications. The dimensions of the flanges vary from ANSI B16.5, 16.47 series A, and B, and other international standard dimensions according to ASTM, ASME, ANSI, and DIN.
Key features:
- Ensures a leak-proof, secure seal
- Compatible with slip-on or weld neck flanges
- Can be customized with NPT threads or central bore holes
- Available with raised face (RF), flat face (FF), or ring joint (RTJ) connections
- Suitable for high-pressure and temperature applications
Common Application Use:
- Oil and gas industry: Isolating pipe sections for maintenance or expansion
- Water treatment plants: Closing inactive lines
- Chemical and pharmaceutical industries: Providing safe, hygienic seals
- Pressure testing: Sealing pipes during integrity checks
- Modular industrial systems: Allowing future pipe modifications
Blind flanges are essential for durable, reliable, and flexible sealing in industrial piping systems.
Frequently Asked Questions
What is a blind flange?
A blind flange is a solid steel disc with no central opening, designed to seal the end of a pipe or pressure vessel, completely blocking fluid or gas flow. It provides a secure closure and is ideal for systems planned for future modifications or expansions.
Key features:
- Ensures a leak-proof, secure seal
- Compatible with slip-on or weld neck flanges
- Can be customized with NPT threads or central bore holes
- Available with raised face (RF), flat face (FF), or ring joint (RTJ) connections
- Suitable for high-pressure and temperature applications
Common uses:
- Oil and gas industry: Isolating pipe sections for maintenance or expansion
- Water treatment plants: Closing inactive lines
- Chemical and pharmaceutical industries: Providing safe, hygienic seals
- Pressure testing: Sealing pipes during integrity checks
- Modular industrial systems: Allowing future pipe modifications
Blind flanges are essential for durable, reliable, and flexible sealing in industrial piping systems.
When should I use a blind flange?
When a pipeline is not in use or needs to be closed off temporarily, a blind flange is the ideal solution to seal the end and prevent leaks.
Blind flanges are useful during maintenance operations where sections of the pipeline need to be sealed off while work is carried out on the system.
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