ISES Hazardous Area Process Heaters

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

The ISES heater comprises a large range of process flow heaters, certified for use in Zone 1 (ATEX and IECEx among others) or Class I, Division 2 (Canada only) hazardous areas, and are custom built to meet client specifications.


  • Certified to ATEX, IECEx or CSA standards
  • Terminal box is certified weatherproof to IP67 or Type 4X
  • Temperature classifications T1 to T6
  • Up to 5000kW
  • Elements are specially sealed to prevent moisture ingress
  • Elements are individually replaceable on site without the need for special tools
  • Suitable and certified for use in high ambient temperatures of -60°C to +60°C
  • Anti-condensation heaters fitted, if required


Certifications ATEX / IECEx EX logo II 2 G
Ex e IIC T1 to T6 Gb IP67
CSA Class 1, Div 2, Groups A, B, C, D, T1 to T6, Type 4 or 4x
CU TR (EAC), CCOE, CNEx, Inmetro
Vessel Design Codes PED Compliant, Stoomwezen, CODAP, PD 5500 2000 Cat 1, ASME VIII Div 1/2, EN13445, AS 1210, AD Merkblätter
Vessel Materials Carbon steel, duplex, Monel, low temperature steel, titanium, 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, Titanium, Monel) 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
Terminal Box Manufactured from 316L stainless steel
Voltage Suitable for voltages up to 690V