×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Thermal Oil Heaters in Australia and New Zealand

Thermal Oil Heaters in Australia and New Zealand

Thermal Oil Heaters in Australia and New Zealand

(OP)
Hello All

My company supplies equipment that uses thermal oil heating systems, typically using something like Duratherm HF, Therminol 55/66, etc. While we do not design thermal fluid heating systems, we sometimes supply them, and will work with a sub-contracted vendor who specializes in thermal fluid heating systems. The units supplied in the past by my company have been designed using US engineering standards.

We are currently investigating thermal oil heating systems for applications in Australia and New Zealand, but there is a concern over the thermal fluid flash points. In the US, it is acceptable to operate thermal fluid heating systems above the heat transfer fluid's flash point, provided the necessary design changes to the equipment are made (ASME code expansion tank, etc)

I've been told that thermal oil heaters cannot operate above the fluid flash point in Australia. Is this true? Are there any other major design implications that apply in Australia? For the current application, relatively high thermal fluid temperature is required, and it is only a few degrees less than the flash point.

Thank you!

RE: Thermal Oil Heaters in Australia and New Zealand

The main safety implication with hot oil operating above flash point is with minor unavoidable leaks from flanges and instrument connections - see electrical hazardous area classification requirements in AU / NZ for cases when systems operate in HAC Zone 2 environments. So you can operate at above flash point if you comply with AU/ NZ HAC requirements, the main one being a Zone 2 motor for the hot oil pump.
Good engineering practice would be to also use Class 300lb flanges for hot oil throughout as a minimum, preferably RTJ. And stay well clear of mag drive pumps; use API Plan 51 or 52 for hot oil pump shaft seals. This website is riddled with negative Operations feedback on all sorts of operating problems with mag drive pumps. Vaguely recall there is some credit you get for Plan 51/ 52 shaft seals on the requirement for Zone 2 hot oil pump motor - check.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close