Page 201 - publication

technical data
Introduction
Couplings
Outlets
Fittings
Val
ves &
Accesso
ries
HighPressure
Advanced CopperMethod (IPS)
DI-LOK
®
Nipples
Plain-EndFittings
HDPECouplings
Sock-It
®
Fittings
StainlessSteel Method
Roll
Groovers
Installation& Assembly
SpecialCoatings
DesignServices
Technical
Data
Master Format3 Part Specs.
PictorialIndex
CTS Copper
System
www.anvilintl.com 201
PIPE-PREPARATION:
To create a Gruvlok pipe joint, all pipe must be prepared to
receive Gruvlok coupling or other Gruvlok pipe system
components. The required pipe preparation may be grooving or
cleaning the pipe ends, or cutting a hole in the pipe wall.
For grooved-end joints, pipe may be grooved by either of two
methods; cut or roll grooving. Branch outlet connections
require a properly sized and correctly located hole to be cut
into the pipe. Sock-it connections require cleaning of the pipe
end. Gruvlok plain-end pipe couplings require that the pipe be
free of burrs and other sharp projections which could damage
the gasket; grooving is not required.
Gruvlok pipe grooving and hole cutting machines are available
in a wide variety of designs to meet specifc or general
requirements. Gruvlok roll grooving machines produce a groove
to proper dimensional tolerances, concentric with the pipe
O.D., even on out-of-round pipe. Gruvlok hole cutting tools
properly center holes for correct assembly of Gruvlok branch
outlet components.
Cut grooving is intended for use with standard and heavier wall pipe. Cut
grooving produces a groove in the pipe wall by removing metal from the
pipe O.D. The groove removes less than one half of the pipe wall and
does not cut as deeply into the pipe wall as do standard pipe threads. The
square cut edge of the groove allows for the full expansion, contraction,
and defection capabilities of the Gruvlok coupling.
cut grooving:
Roll grooving:
Roll grooving does not remove metal. Instead, metal is displaced while
a groove is formed into the outer surface of the pipe wall. The groove
confguration has slightly rounded edges resulting in a less fexible joint
than a cut groove joint. This reduces available pipe joint movement by 50%
over cut grooved coupling joints. Roll grooving is commonly used on a
wide range of pipe thicknesses up to 0.375" wall steel pipe and sizes to 24"
O.D.
Cut Grooving
Depth of Cut Groove
vs. Thread
Volume of Metal Removed
Cut Groove vs. Threaded
Roll Grooving
The I.D. “dimple" formed from roll grooving reduces the
I.D. (on an average) less than 2%.
Roll Groove
Cut Groove
Available Movement
Roll Groove vs. Cut Groove
GL-2.10