Tuesday, January 31, 2017

Don't Let Frozen Aggregate Clog Your Process Equipment

FRP hopper heaters
FRP hopper heaters
FRP chute heater
FRP chute heater
Processing lines in coal mines, quarries, cement plants, mining facilities, and power plants have a special problem in very cold weather. The coal, sand, cement, ores, or other mined products they handle can freeze and cause equipment outages. The combination of trace moisture mixed with aggregate material, plus freezing temperatures, combine for major problems with conveyors, hoppers and chutes. When the aggregate hits the cold steel surface, it instantly freezes (flash freezing). The bond between the frozen aggregate and the steel wall is virtually unbreakable, and can cause long down-times with the equipment. Maintenance people have their own, time-tested curative solutions - torches and hammers - but installing preventative measures is clearly preferable.

FRP trough heater
FRP trough heater
The FRP heating panel, a waterproof, dust tight, and vibration resistant heater is an excellent preventative solution. FRP heaters are designed to be used in the high vibration, corrosive and dirty areas where they are installed. Available with FM approval for use in hazardous areas, they provide an easily customized panel that conforms to the shape and size needed to fit any chute or hopper. Additionally, they are lightweight, can be applied to flat or curved surfaces, and are very easy to install and maintain.

FRP trough heater
FRP trough heater
For more information on chute, conveyor, hopper or pipe heating, contact the experts at Hotfoil-EHS by visiting www.hotfoilehs.com or calling 609-588-0900.

Saturday, January 28, 2017

Custom Control Panel Fabrication: Start to Finish

Hotfoil-EHS provides custom control panels for a variety of applications. Know for their quality, service, and availability, Hotfoil's experience in designing systems is broad.

Hotfoil-EHS has traditionally focussed on electric heating systems including heating tanks and vessels as well as electric heat tracing, but more recently has developed an expertise in combustion heating system controls. For more information visit http://www.hotfoilehs.com or call 609-588-0900.

Below is a time lapse video of a custom design control panel being fabricated from start to finish.

Sunday, January 22, 2017

Applying Ceramic Mat Heaters for Pre and Post Weld Heat Treatment

Designed for pre and post weld heat treating, ceramic mat heaters function efficiently for both curved and flat applications. The flexibility of these heaters provides a convenient means to heat treat large metal surfaces in the field.

The application of ceramic mat heaters is straightforward - the heater is placed directly on the part to be welded, insulation is normally laid over the heater, and voltage is applied. A thermocouple is tack-welded near to monitor the part. The part is brought up to temperature and then the welding is done. After the weld, the part is cooled at a controlled rate.

Ceramic Mat Heaters
Welding a large pipe with localized heating using
ceramic mat heaters.
Pipe prep before welidng
Preparing the pipe for the weld and allowing
the heaters to raise the temperature of the pipe.

ceramic heaters before weld
Wrapping ceramic mat heaters around
spool piece.
Close-up of ceramic mat heaters around
spool piece.

Wednesday, January 11, 2017

Ceramic Pad/Mat Heaters: The Tried and True Way to Heat Treat

Ceramic mat heater
Ceramic mat heater: Proven performance over time.
Heat treating large metal surfaces in the field before and after welding is usually a challenge. Over the years, products have been developed that perform well and withstood the test of time. One of these products is the ceramic pad heater.

Ceramic pad heaters (also known as mat heaters) are constructed of interlocking sintered alumina ceramic beads (usually pink or white in color) which insulate an 80/20 Nickel/Chrome multi-strand wire (the resistance element).

Ceramic pad heaters are designed for most pre-heat and post-heat treatment requirements on weld joined materials (stress relieving). Available in numerous sizes, shapes, configurations, voltages and wattages, they can be used up to 2150°F in various weld heat treating applications.

Ceramic mat heater
Various shapes and sizes.
They are designed for re-use in a wide variety of heating applications. Their flexible design allows for conformance and good heat transfer to the target part. Their rugged design is well suited for most industrial environments where shock and vibration is a reality. Ceramic pad heaters can be used with or without the application of insulation. The use of insulation will greatly speed up the heating
process as well as more efficiently retain the heat for soaking.

For more information on the use and installation of ceramic pad (mat) heaters, visit Hotfoil-EHS at www.hotfoilehs.com or call 609.588.0900.