BACK FACING: Flanges may be back-faced or spot-faced for compliance with the flange thickness tolerances.
"T" Dimensions are finished dimensions. Sufficient additional thickness must be provided to allow for compliance of facing requirements.
300-04: Class 125 Ductile & Gray Cast Iron Flange Detail
new industry standard
NAPF 500-03
Surface preparation standard for ductile iron pipe and fittings receiving special external coatings and/or special internal linings. Click here for a preview »
"NAPF . . . setting the standard"™
