“A” Dimension –
The “A” dimension, or the distance from the pipe end to the groove, identifies the
gasket seating area. This area must be free from indentations, projections (including weld seams),
and roll marks from the pipe end to the groove to ensure a leak-tight seal. All foreign material, such
as loose paint, scale, oil, grease, chips, rust, and dirt must be removed.
“B” Dimension –
The “B” dimension, or groove width, controls expansion, contraction, and angular
deflection of flexible couplings by the distance it is located from the pipe and its width in relation to
the coupling housings’ “key” width. The bottom of the groove must be free of all foreign material,
such as dirt, chips, rust, and scale that may interfere with proper coupling assembly.
“C” Dimension –
The “C” dimension is the average diameter at the base of the groove. This
dimension must be within the diameter’s tolerance and concentric with the OD for proper coupling
fit. The groove must be of uniform depth for the entire pipe circumference.
“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 cut or roll grooving. Pipe that is less than the minimum nominal wall thickness for
cut grooving may be suitable for roll grooving or adapted for Victaulic couplings by using Vic-Ring
®
Adapters. Vic-Ring Adapters can be used in the following situations (contact Victaulic for details):
• When pipe is less than the minimum nominal wall thickness suitable for roll grooving
• When pipe outside diameter is too large to roll or cut groove
• When pipe is used in abrasive services
NOTICE
• Coatings that are applied to the interior surfaces of Victaulic grooved and plain-end
pipe couplings must not exceed 0.010 inch/0.25 mm. This includes the 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.
TM-VE268_53
REV_H
TM-VE268
/ Operating and Maintenance Instructions Manual
