Steam Design Guide
All too often an old steam tracing specification or previously
adopted practices are followed which overlook new product
developments or improvements. Today there are more types of
steam tracers to choose from than ever before, providing a
range of conductances to closely match the actual heat requirements
for a given pipe heating system. By maximizing
performance with a range of steam tracers while minimizing the
total cost of unnecessary components, the cost of ownership
for a steam tracing system is optimized.
This design guide addresses the steam tracing requirements of
piping and equipment by matching the heating requirements
with the type of steam tracers best suited for that application.
The information contained in this design guide will take the
reader through a step-by-step procedure to make proper
steam tracer selections based on:
|• Pipe size
||• Maximum exposure temperature limitations
|• Thermal insulation type and thickness
||• Minimum ambient temperature
|• Desired maintain temperature range
After following the prescribed steps in this design guide, the
reader will be able to design, select and/or specify or establish
a bill of materials for a steam tracing system.
For applications ranging from freeze protecting water lines to
maintaining elevated process temperatures as high as 1,250°F
(677°C), Thermon has a tracing product to fit the application.
These product families are distinctly broken down into three
groups: isolated tracers, bare convection tracers and conduction
Isolated Tracers . . . Designed for use with low to medium-low
heat requirements, Thermon’s SafeTrace® SLS-IT and
are metallic tracer tubes covered with composite materials that
lower thermal conductance to reduce heat output and temperature.
The reduced heat output of SafeTrace SLS-IT and
DLS-IT is predictable to ensure
controlled heat distribution
along the length of a
traced pipe without hot spots
or overheating. These tracers
also utilize a safety yellow
identification jacket to signify
the presence of inherently
dangerous materials such as
steam. A feature unique to SafeTrace SLS-IT and
DLS-IT is their
ability to run continuously from the steam supply manifold,
along the pipe and to the condensate return manifold.
Convection Tracers . . .
By using bare tracers or SafeTrace
tracers, convection tracing provides medium-low to medium
heat transfer requirements. SafeTrace BTS is a metallic tracer
tube covered with a special
high temperature polymer
jacket that provides a measure
of personnel burn protection
without sacrificing thermal
performance. The safety
yellow jacket also provides
corrosion resistance to most
acids and alkalis.
Conduction Tracers . . . When the heat requirements exceed
the capabilities of isolated and convection tracers, tracers aided
by heat transfer compounds should be used. Thermon’s heat
transfer compounds are available in a wide variety of configurations:
SnapTrace® preformed ﬂexible heat transfer compound
T-3 water based heat transfer compound
T-99 water based heat transfer compound
T-80 and T-85 epoxy base heat transfer compound
T-802 two-part resin based heat transfer compound
NH nonhardening heat transfer compound
EFS™-1 ﬂat, ﬂexible heat transfer compound)
transfer compounds are engineered to meet the application requirements, provide excellent
heat transfer at a fraction of the cost of a jacketed pipe system
while eliminating the possibility
of product contamination.
The heat transfer properties
of Thermon’s compounds are
so good that a single tracer
utilizing heat transfer compound
will do the work of
three to five bare tracers.
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