In Brief

  1. Involved in the design and fabrication of water bath and indirect-fired heaters since 1984.
  2. Comprehensive product range and state-of-the-art features, as listed below.
  3. Design to Australian and international standards as required.

History, Product Range, Design Standards & Features

Uniquip has been designing and supplying water bath heaters since 1984.

Uniquip can design water bath heaters for a variety of applications, including:

  • Heating Natural gas prior to pressure reduction to prevent freezing due to the Joule-Thomson effect.
  • Crude oil heating
  • Vaporising and superheating LPG & LNG
  • Regeneration Gas heating
  • Heat sensitive gas and fluids
  • Amine reboilers
  • TEG reboilers
  • MEG reboilers


Uniquip’s typical water bath heater would be design to the following standards:

  • Work Health and Safety Act & Regulation 2011 (overarching legislation)
  • AS/NZS 1200: Pressure equipment (or ASME BPVC)
  • AS 1210: Pressure vessels
  • AS 4041: Pressure piping
  • AS 1375: Industrial fuel-fired appliances
  • AS 3814: Industrial and commercial gas-fired appliances
  • AS 1657: Fixed platforms, walkways, stairways and ladders – Design, construction and installation
  • AS/NZS 3000: Electrical installations (known as the Australian/New Zealand Wiring Rules)
  • AS 4323.1: Stationary source emissions – Selection of sampling positions

The design of Uniquip’s water bath heaters typically incorporates the following features unless otherwise agreed with the client:

  • Vessel saddle supports
  • Natural or forced draught burners for oil, gas or dual-fuel operation
  • Burners are selected for correct duty, flame pattern, stable operation, maximum turndown, and emissions to meet Australian Standards and the site’s EPA Licence requirements (as required)
  • Removeable fire tube
  • Removeable process coil
  • Adequate clearance between flame and fire tube to avoid flame impingement and ensure longevity of the unit
  • Consideration of the bath fluid to ensure allowable film temperatures are not exceeded
  • External ceramic fibre insulation and cladding
  • External or self-supporting stacks at a height to meet site requirements (c/w helical strakes and rain cap if required)
  • Expansion vessel (if required)
  • Packages can be designed to be Hazardous Area compliant as required
  • System control equipment, as a typical minimum, includes:
    1. Burner Management System (BMS), controlling fuel valve train and burner firing rate
    2. Bath fluid low level detection and interlock
    3. Bath fluid high temperature detection and interlock
    4. Bather fluid temperature controller
    5. Flue gas high temperature detection and interlock at stack
    6. Pressure and temperature gauges for local readings
  • Typically, additional control measures will be added to a heater or system as a result of the project Hazard and Operability Study (HAZOP), in which Uniquip will participate and provide advice
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61 Alleyne Street

Chatswood 2067

NSW, Australia

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