Nibco Plastics Catalog - Paramount Supply
Nibco Plastics Catalog - Paramount Supply
Nibco Plastics Catalog - Paramount Supply
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AHEAD OF THE FLOW ®<br />
Threading Instructions for Thermoplastic Pipe (Continued)<br />
2. A tapered plug<br />
must be inserted<br />
in the end of the<br />
pipe to be threaded.<br />
This plug provides<br />
additional<br />
support and prevents<br />
distortion of<br />
the pipe in the<br />
threaded area. Distortion of the pipe during the threading<br />
operation will result in eccentric threads,<br />
non-uniform circumferential thread depth or gouging<br />
and tearing of the pipe wall. See table below for approximate<br />
plug O.D. dimensions.<br />
Reinforcing Plug Dimensions*<br />
Nominal Size Plug O.D.*<br />
1/2 0.526<br />
3 3/4 0.722<br />
1 0.935<br />
1 1/4 1.254<br />
1 1/2 1.476<br />
2 1.913<br />
2 1/2 2.289<br />
3 2.864<br />
4 3.786<br />
These dimensions are based on the median wall thicknesses and average<br />
outside diameter for the respective pipe sizes. Variations in wall thickness<br />
and 0. D. dimensions may require alteration of the plug dimensions.<br />
3. Use a die stock<br />
with a proper<br />
guide that is free<br />
of burrs or sharp<br />
edges, so that the<br />
die will start and<br />
go on square to<br />
the pipe axis.<br />
NIBCO INC. WORLD HEADQUARTERS 1516 MIDDLEBURY ST. ELKHART, IN 46516-4740 USA PH: 1.800.234.0227<br />
TECH SERVICES PH: 1.888.446.4226 FAX: 1.888.336.4226 INTERNATIONAL OFFICE PH: +1.574.295.3327 FAX: +1.574.295.3455<br />
www.nibco.com<br />
www.nibco.com<br />
Revised 9/10/2009<br />
4. Push straight<br />
down on the handle,<br />
avoiding side<br />
pressure that<br />
might distort the<br />
sides of the<br />
threads. If power<br />
threading equipment<br />
is used, the<br />
dies should not be driven at high speeds or with heavy<br />
pressure. Apply an external lubricant liberally when cutting<br />
the threads. Advance the die to the point where the<br />
thread dimensions are equal to those listed in the table<br />
on Thread Dimensions above. Do not over-thread.<br />
5. Periodically<br />
check the threads<br />
with a ring gage<br />
to insure that<br />
proper procedures<br />
are being followed.<br />
Thread<br />
dimensions are<br />
listed in the table<br />
on Thread Dimensions. The gauging tolerance is ± 1 1/2<br />
turns.<br />
6. Brush threads<br />
clean of chips<br />
and ribbons. Then<br />
starting with the<br />
second full thread,<br />
and continuing<br />
over the thread<br />
length, wrap<br />
PTFE thread<br />
tape in the direction of the threads. Overlap each wrap by<br />
one half the width of the tape. Thread lubricant/sealant<br />
may be used if approved by the manufacturer.<br />
85
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