POWER August 2011 - 23

9. Prolonging pipe life. Strength and
wear resistance can be improved by adding
alloying elements to the steel during the pipe
manufacturing process or with secondary
processing of the steel, including heat treating
by induction hardening, which can extend
pipe longevity up to eight times. Courtesy:
Ultra Tech Pipe
of less than 15 degrees, which is a small
enough angle that you no longer have
impact abrasion but essentially sliding
abrasion, " says Wollenberg. " With a large
enough bend, for all intents and purposes
you have made it a straight pipe. "
Because Ultra Tech is able to induction
harden the pipe during the bending process,
it can vary the arc radius of the pipe
from 20 inches to 180 inches and handle
multiple diameters or thicknesses of pipe.
" The bending process has added benefits,
in that it's much easier to reduce
the ovality that one sees so often with
a cold bend, " says Wollenberg. " Although
you will still get some wall thinning-depending
on the radius of the bend-it is
much less than a cold bend. "
Increasing the Radius of the Bends
Another legitimate technique to mitigate
the effects of impact abrasion is
using induction-hardened pipe in longradius
bends.
" If there is enough room, you can design
the bend with an impingement angle
Wear Tiles and Inserts
A layer of wear tiles can also protect the
inside wear surfaces of the pipes. Industrial
wear tiles are made from materials
that are harder and more abrasion resistant
than the base piping.
These tile materials can be cemented
carbide, cast high chrome and NiHard (alloyed
with nickel and chromium), aluminum
oxide, and basalt. Cemented carbide
tiles are usually quite small in size (about
1 inch square and ¼ inch thick). Aluminum
oxide tiles can be almost any size and
have thicknesses over 1 inch. Basalt is a
naturally occurring igneous rock that can
be molded and cast into shapes while retaining
hardness between 8 and 9 on the
Moh scale.
Also, if the impact abrasion is particularly
severe, thicker inserts can help.
" Additional thickness of those wearable
material inserts will help out in a lot of
those situations, " says Wollenberg.
The bottom line is that the proper selection
of component accessories, including
the various configurations and alternate
materials, can provide the ultimate total
system wear life expectancy. By designing
piping bends and elbows to withstand highimpact
abrasive wear, a reduction in operating
costs can be realized in the system.
" If you've got more of a critical system
where you can't afford any down time
other than scheduled, then it's worthwhile
to spend the extra money for the appropriate
abrasion-resistant solutions, " says
Wollenberg. ■
-Contributed by Ultra Tech Pipe (www.
ultratechpipe.com).
circle 13 on reader service card
August 2011 | POWER
www.powermag.com
23
http://www.ultratechpipe.com http://www.powermag.com

POWER August 2011

Table of Contents for the Digital Edition of POWER August 2011

Contents
POWER August 2011 - Cover1
POWER August 2011 - Cover2
POWER August 2011 - Contents
POWER August 2011 - 2
POWER August 2011 - 3
POWER August 2011 - 4
POWER August 2011 - 5
POWER August 2011 - 6
POWER August 2011 - 7
POWER August 2011 - 8
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POWER August 2011 - Cover3
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