Blank flange or blind flange is connected to the flange at the end of the pipeline, and is a round plate with bolt holes that closes the pipeline. In order to prevent the rust and cracks on the surface of the stainless steel flange, the surface of the carbon steel flange is usually coated with an electroplating layer (yellow zinc, white zinc, etc.), or painted with anti-rust oil and sprayed with anti-rust paint.
|2||Process||Forging and machining|
|American Standard||ASME B16.5,ASME B16.47,ANSI B16.5,API605,AWWA C207|
|Japanese Standard||JIS / KS 5K / 10K / 16K / 20K / 30K|
|British Standard||BS4504 PN16 / 25 / 40,BS10 TABLE E / TABLE D|
|Italian Standard||UNI 2253,2254,2276,2278,2281,6084-6093|
|China Standard||GB/T 13402-92,GB/T9112-9124-2000,HG5010-5028|