Blind Flanges

Our company provides Blind Flanges.

The blind flange is a flange used at the end of the pipeline and mainly plays a closed role, it is also called a flange cover or plug.

  • ASME/ANSI B16.47 Blind Flange  Pressure Class 150-900 Series A and Size 26″to 60″
  • ASME/ANSI B16.47 Blind Flange  Pressure Class 75-900 Series B and Size 26″to 60″
  • ASME/ANSI B16.5 Blind Flanges Pressure Class150-2500 and Size 1/2″to 24″

B16.47 Series A Blind Flanges

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B16.47 Series B Blind Flanges

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ASME/ANSI B16.5 Blind Flanges

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Blind Flanges

The blind flange is also known as the flange cover, the reason is that it is different from other flanges, the center is closed, like a cover, to seal the pipeline, so it is also known as a plug, mainly used for the pipeline ending, or needs to temporarily close the place of maintenance.

Blind Flanges

Here is a table outlining the specifications and characteristics of Blind Flanges:

Specification/FeatureDescription
Pressure Ratingsclass150, class300, class600, class900, class1500, class2500
Size Range1/2″-60″
Materialscarbon steel, stainless steel, alloy steel
Facing TypesRaised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ), and Male and Female (M&F)
Bolt Hole Quantity and DiameterThe number and diameter of bolt holes vary with flange size and pressure rating
Connection MethodBlind flanges can be connected by bolting, welding, flanging, quick clamping, or quick swivel connection.
Standards and CodesASME/ANSI B16.5，ASME/ANSI16.47
Seal TypesO-rings are usually used for sealing, as well as flat seals, seals with flanges and grooves that fit into each other, seals with packing or sealant between threads, and seals by welding.
Accessories and AttachmentsCommon fittings and accessories are seals, sealing gaskets, bolts and nuts.
Inspection and TestingCommon fittings and accessories are seals, sealing gaskets, bolts, and nuts.
MarkingIt mainly includes size inspection, appearance inspection, material inspection, sealing performance test, pressure resistance test, connection strength test, wear and tear test, and so on.
CertificationCommon certifications include ISO, ASME, API, etc. Certification indicates that the flange meets the requirements of standard specifications.
Blind Flanges Main Features and Specifications Table

The blind flange is mainly used at the end of the pipeline to play a secret role but also can be used in the pipeline that needs to be repaired or overhauled to do the role of blocking.

Commonly there are round blinds, square blinds, and figure of 8 blinds, etc. If you have the need we can customize the shape of the blinds to fit your pipeline according to your requirements.

The difference between the blind and the flange is that there is no hole in the middle, so the medium can not pass, while the flange has a hole in the middle mainly to connect the two pipelines, the medium can be normal through the blind is mainly to play the role of blocking.

A blind plate is a plate-like the flange, there are bolt holes, but there is no hole in the center, installed in the pipeline, the pipeline medium can not pass, and the pipeline will be sealed, which mainly play a role in blocking the pipeline, mainly used in the end of the pipeline, or temporary need for maintenance.