×
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

Boiler Tubes Leak
7

Boiler Tubes Leak

Boiler Tubes Leak

(OP)
Hi Everyone,

I have a high pressure water boiler leaked after very short upset in the boiler feed water pH: the pH was around 3 to 4! Has anybody come across such thing? What might be the causes? The steam condensate makeup is demineralized water (pH of demin water is within range). No leak of ion exchange chemicals! What makes this a bit strange is that the leak occurred in only one boiler while the others (same operation, same age, same maintenance schedule, same everything!) did not suffer from any leaks although fed with the same BFW. The BFW is of course treated with oxygen scavenger and neutralizing amine after the deaerator.

Thanks in advance.

RE: Boiler Tubes Leak

How can you possibly ask for crowdsourced opinions when you have not even done any metallurgical evaluation to characterize your leak? At minimum, you need to perform such a destructive evaluation to identify your failure mechanism and characterize the leak.

RE: Boiler Tubes Leak

Have you reviewed this issue with the supplier that manages your chemical treatment program? What does he say?

RE: Boiler Tubes Leak

The low pH value is a clear indication of a process control problem.
The corroded boiler steel (if that is what happened) was just the innocent bystander.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: Boiler Tubes Leak

2
Corroneer,

Boilers are in a category of expensive equipment where careful examination of evidence points strongly to a reason for failure.

There have been many, many books, articles and papers written about boiler failures and conclusive evidence is always present.

https://www.amazon.com/Metallurgical-Failures-Foss...

You have not offered any data or forensic evidence.....

https://www.amazon.com/Nalco-Boiler-Failure-Analys...

Nothing will happen until you do ....

It seems that you already know this, but you are looking for excuses supported by random voices from eng-tips ....

You did not control water quality for some unknown period of time and now you are in a panic ...

The owners of the boiler could not care less about operations ...... until they face expensive repairs

It is now time to call in a seasoned expert, pay him for his services and get a report

Only my opinion ...

Anyone else ?


MJCronin
Sr. Process Engineer

RE: Boiler Tubes Leak

3
MJC is speaking the truth here.
Don't rely on the OEM or your water treatment people.
Find and experienced independent consultant and pay him many thousands of dollars to come in and assist with the analysis.
He will require a bunch of testing be done, some of which is also costly.
Do it.
It is the only way that you will know enough to be able to prevent this in the future.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Boiler Tubes Leak

(OP)
Thanks everyone for their replies and comments. A multi-disciplinary team with experts of different backgrounds is carrying out a full failure investigation and we are in the final stages, but I wanted to see previous experiences and any pointers. Let's wait and see. Any further comments and references are always welcome.

@bimr, the chemical supplier blames a "process upset".

RE: Boiler Tubes Leak

Your water treatment supplier is not your friend. Think of them as your dealer.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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