Dimensional Tolerances for Flanges as per ASME / ANSI B 16.5
Reference: W. Maass Nederland BV Catalog for Flanges Pipes Fittings Engineering http://www.wmaass.nl/pdfs/catalogue.pdf
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Reference: W. Maass Nederland BV Catalog for Flanges Pipes Fittings Engineering http://www.wmaass.nl/pdfs/catalogue.pdf