FP Hazardous Area Process Heaters

Product Applications
  • Fuel gas
  • Natural gas
  • Industrial gases
  • Molecular sieve regeneration
  • Heat transfer oils
  • Fuel oils
  • Water
  • Crude oil / hydrocarbons / liquids
  • Heating mediums

The FP type flameproof electric heaters comprise a large range of process flow heaters, certified for use in hazardous areas and are custom built to meet client specifications.


  • Certified to ATEX, IECEx or CSA standards
  • Terminal box is certified weatherproof to IP66 as well as Type 4 or 4X standards
  • Temperature classifications T1 to T6
  • Up to 1400kW (larger ratings achieved by a combination of enclosures)
  • Elements are individually replaceable on site without the need for special tools
  • Anti-condensation heaters fitted, if required


Certifications ATEX / IECEx    II 2 G/D
Ex d IIC T1 to T6 Gb
Ex tb IIIC T85 to T450°C Db IP66
EN 60079-0, EN 60079-1, EN 60079-7, EN 60079-31
CSA (CEC / NEC) Class I, Div 1, Groups A, B, C, D; T1 to T6, Enclosure Type 4 or 4X
CSA (CEC) Ex d IIC; T1 to T6 Gb, IP66 (CAN)
CSA (NEC) Class I, Zone 1, AEx d IIC; T1 to T6 Gb, IP66 (USA)
CU TR (EAC), CNEx, CCOE, Inmetro, KGS
Vessel Design Codes PED Compliant
PD 5500 2000 Cat 1
AS 1210
AD Merkblätter
Vessel Materials Carbon steel
Low temperature steel
Nickel alloys
Stainless steel
Super austenitic
Elements Manufactured from 80/20 NiCr resistance wire with high purity compacted magnesium oxide powder sheathed within corrosion / erosion resistant tube, eg:

Incoloy 800/825
316/316L stainless steel
Inconel 600/625
321 stainless steel

Element sheath available in welded or seamless tube up to 1.6mm thick
Internals Elements are supported in a segmental or rod type baffle assembly to prevent flow-induced vibration and hot spots, generally complying with TEMA standards
Element to Tubesheet Generally, elements are sealed into the flange by ‘Bite’ type couplings which provide a 100% seal at pressures up to 400 barg and give the opportunity to replace individual elements on site; elements can be welded to the tubesheet, in stand-off and non-stand-off configurations
Terminal Box Manufactured from either iron or stainless steel
Voltage Suitable for voltages up to 690V (600V CAN and USA)