At last industry now has a choice when it comes to ensuring that their hazardous area electrical heating requirements are met. Until now the only option has been to import equipment from the UK , or to continue using equipment not fully complying with current flameproof requirements.

Grimwood Heating has implemented the required quality system to gain IEC certification for the design and manufacture of Ex d heaters.

 Depending on the location and operating environment, units can be made in either carbon steel or stainless steel.

The benefits of using locally designed and manufactured product fully complying with hazardous area requirements are shorter supply chains, lead times, along with quicker and clearer communication.

• Ideal for heavy duty industrial applications requiring the heating of liquids or gases.
• Available in a wide range of power ratings –from 2.3 kW to 400 kW.
• Various sizes available –diameters ranging from 3” to 14”.
• Flanged immersion heaters are now manufactured with a flameproof enclosure for use in hazardous environments (including the mining and petrochemical industries).
• Certified to Ex D Flameproof IEC standards.

Grimwood can also supply a fully featured control panel with over temperature policemen, thyristor power control and network capabilites to suit your SCADA system.

White Paper: Hazardous Area Heating

4.10 Articles
Joule-Thomson Effect Compensation - What is the J-T effect? Typically, it is taken to mean the drop in temperature that occurs when gas pressure is reduced. The magnitude of the temperature drop depends on the starting pressure, the pressure change and the composition of the gas. The J-T coefficient, or the change in temperature per unit change in pressure is not a constant and is highly variable for any particular gas mixture depending on the starting and ending conditions. Why is compensation required? Under large pressure changes, the temperature of the gas or gas mixture can fall to a point were the gas or a component of the mixture starts to condense into a liquid, or in extreme cases to solidify (such as ice formation where traces of moisture exist).The carry over of liquid droplets or ice particles into valves and other machinery components can cause equipment malfunction with catastrophic consequences.The way to prevent this is to preheat the gas before the pressure reduction so that the temperature after expansion is above the saturation temperature of components of the gas mixture. Click on the link above to read how Grimwood Heating provides a great solution.. 
When is a Heated Vessel a Pressure Vessel? -  Many industries require electric heating of various fluids, either liquids or gases as a normal part of their processes.What are often not fully understood are the regulatory implications for suppliers, owners and operators of this heating equipment. This is especially so when it relates to the potential dangers of heated fluids within closed vessels, and when they become “Pressure Vessels”. This article seeks to provide some guidance for owners and operators of heated vessels so they are in a position to ask the right questions of their suppliers to protect themselves, their employees and their employer.

For further information on EXd Immersion heaters see: http://www.grimwoodheating.com.au/flangeheaters.htm

Click here for the standard safe area flanged heaters catalogue, 429kB Updated 17 Jun 2009

The focus of Grimwood today is on providing customers who value quality with products they can trust on short lead times and with reliable service.

Grimwood Heating Pty Ltd
PO Box 4 Villawood NSW 2163 Australia
Phone +61 2 8717 0211 Fax +61 2 8717 0284
Website www.grimwoodheating.com.au
Email enquiries: brian.walkington@grimwoodheating.com.au