suppliers and installers of Raychem "Chemelex" Autotrace
surface heating products and other tapes.
Kemwell have been in the business of designing and
installing electric trace heating systems since 1985.
Trace Heating, or Electric Surface Heating as it is now more
generally known, can be described as the application of heat
to the external surface of a pipe, vessel or hopper, to
either maintain a specific temperature or prevent the
freezing of a liquid, product or substance.
The prime function of trace heating is to compensate for the
heat lost through the thermal insulation from the warmer
process to the cooler ambient air. It will be seen
from this that the subsequent thermal insulation of any
electric surface heating installation is a vital part of the
Electric surface heating is used for
frost protection, (winterisation), temperature maintenance
or condensation prevention on pipework, instrument lines,
vessels, tanks, hoppers and silos.
"Our clients benefit by having any or all of the
following Kemwell services from a single source".
The Kemwell Package includes:
Design of trace heating systems
Selection of the most suitable trace
Installation of the trace heating system by Kemwell personnel
Design and supply of the control panel(s)
Installation of the associated thermal insulation and
cladding by the
guarantees a truely compatible system designed as a complete
In 1985 KEMWELL became a registered and approved designer and
installer of the Raychem “Chemelex” Autotrace self regulating electric trace heating systems for both the industrial and
construction markets. We also use other tapes to suit client requirements. Installations are carried out using Raychem
self-regulating trace heating tapes. Alternatively, for
specific problems such as extremely high temperature maintenance or withstand
situations, fixed resistance heating tapes and cables may be installed.
Mineral insulated heating cables are used where high
power loadings or high temperatures, (up to 600oC)
are required and are also used for road and ramp heating applications. The Raychem
“Chemelex” self-regulating trace heating tapes have the built-in safety factor of a known maximum temperature allied to the most
economical running cost, ease of control and lowest installation cost, and they generally offer the best solution to a
variety of trace heating requirements.
Heating pads and blankets or trace heating tapes and cables can be
applied to the external walls of tanks, vessels, hoppers and silos for temperature maintenance or for condensation prevention.
KEMWELL install Raychem “HWAT” self-regulating trace
heaters onto hot water distribution systems to provide fully adjustable maintained
temperatures in the range 50oC to 60oC
and can also provide automatically targeted temperatures for
thermal disinfection of closed systems, an important consideration in protection against Legionella.
Our electric trace heating equipment is fully certified
for use in both Zone 1 and Zone 2 hazardous locations, with systems
designed to suit any
temperature classification. Control can be by simple mechanical thermostats sensing
either the ambient
temperature or the pipe or vessel surface temperature. Electronic
thermostats are also available. All of these thermostats can be supplied fully certified for
use within Zone 1 and Zone 2 hazardous locations.
Complete electronic control systems are designed and
supplied using controllers fitted within the control panel, switched by temperature sensors on the
pipelines. This offers easy local and remote monitoring, and very accurate control of
the trace heating circuits.
Internal trace heating can be introduced into pipelines
where it is not practical to fit external trace heaters. This method is normally only
applied to longer, uninterrupted lengths of large bore, unvalved, pipelines.
All trace heating cables and tapes installed by KEMWELL
satisfy the requirements of Health and Safety at Work Act (UK) and are fully certified as
complying with the requirements of BS 6351 Pt. 1: 1983.A
All design and installation is carried out to the
requirements of BS 6351 Parts 2 and 3.
Benefits of Electric Trace Heating include the
More reliable than other systems
efficient in operation
additional heat losses such as found in steam/condensate
systems or jacketed systems
Low or no
temperature control than steam
Heat produced only at the point
On the following pages we outline some typical industries
and a number of applications where Electric Surface Heating
and or Insulation has been installed by KEMWELL.
of jobs successfully carried out within the following
Effluent Treatment Plant
Industries and Applications for Electric Surface Heating:
Construction and Building
water lines frost protection
Exposed LTHW lines frost protection
cold water services frost protection
inclined roadway heating
systems frost protection
services temperature maintenance
and Petrochemical Plant:
maintenance of process lines
maintenance on process vessels
of caustic solution crystallisation
protection of water services
shower frost protection
Pre-heating reactor lines
and impulse line heating
oil line heating
treatment plant frost protection
solution, (NaOH), heating
sulphur temperature maintenance
line trace heating
bitumen line trace heating
suppression pipework frost protection
Intermediate bulk container, (IBC), tank heating
liquid sugars heating
tanks temperature maintenance
Condensation prevention in flour silos
lines and vats heating
Sewage Treatment Plants
protection of water lines
Temperature maintenance in sludge lines
system trace heating
showers frost protection
varnish and resin lines
for pumps etc.