EXPLANATION OF CRITICAL ROLL GROOVE DIMENSIONS (CONT.)
“D” Dimension –
The “D” dimension is the normal depth of the groove and is a reference for a
“trial groove” only . Variations in pipe OD affect this dimension and must be altered, if necessary, to
keep the “C” dimension within tolerance . The groove diameter must conform to the “C” dimension
described above .
“F” Dimension –
Maximum allowable pipe-end flare diameter is measured at the extreme pipe-end
diameter .
NOTE:
This applies to average (pi tape) and single-point readings .
“T” Dimension –
The “T” dimension is the lightest grade (minimum nominal wall thickness) of pipe
that is suitable for roll grooving .
NOTICE
• Coatings that are applied to the interior surfaces of Victaulic grooved pipe couplings must
not exceed 0.010 inch/0.25 mm. This includes bolt pad mating surfaces.
• In addition, the coating thickness applied to the gasket-sealing surface and within the
groove on the pipe exterior must not exceed 0.010 inch/0.25 mm.
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/ Operating and Maintenance Instructions Manual
