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What is a steel flange (3)?
What is a steel flange(4)?
MEASUREMENTS
Flanges within the same standard can either
be flat (commonly cast iron, ductile iron) or raised face (commonly cast
steel and stainless steel). These flange tables cover the critical
flange dimensions to help identify what standard you have.
Critical flange dimensions help to identify the standard.
Pipe Size – Pipe flanges also have a corresponding pipe size, generally according to accepted standards.
Outside Diameter of Flange (OD) – this is measured from outer edge to opposing outer edge.
Pitch Circle Diameter (PCD) – this is a diameter that measures from the center of bolt hole to opposing bolt hole.
Flange Thickness – this measures only the thickness of the attaching outer rim, and does not include the part of the flange that holds the pipe.