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VE272SFS Roll Grooving Tool
EXPLANATION OF CRITICAL ROLL GROOVE DIMENSIONS
Standard Roll Groove
Outside Diameter (“OD”) Dimension –
The outside diameter of roll grooved pipe must not vary
from the specifications listed in the following tables. The maximum allowable tolerance from
square-cut pipe ends is 0.030 inch (0,8 mm) for
3
/
4
- 3
1
/
2
-inch sizes; 0.045 inch (1,1 mm) for 4 –
6-inch sizes; and 0.060 inch (1,5 mm) for 203,2 mm and larger sizes. This is measured from the
true square line.
“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, and roll marks from
the pipe end to the groove to provide a leak-tight seal for the gasket.
“B” Dimension –
The “B” dimension, or groove width, controls expansion and angular deflection
by the distance it is located from the pipe and its width in relation to the housings’ “key” width.
“C” Dimension –
The “C” dimension is the proper diameter at the base of the groove. This
dimension must be within the diameter’s tolerance and concentric with the OD for proper cou-
pling 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.
This groove must conform to the “C” dimension.
“F” Dimension (Standard Roll Groove Only) –
Maximum allowable pipe-end flare diameter is
measured at the extreme pipe-end diameter.
“T” Dimension –
The “T” dimension is the lightest grade (minimum, nominal wall thickness) of
pipe that is suitable for roll grooving (except for PVC pipe).
A B
D
B
T
C
OD
TM-VE272SFS 3776 Rev_B.fm Page 44 Friday, December 3, 2004 12:10 PM
Summary of Contents for VE272SFS
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