×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Stainless pipework left for years

Stainless pipework left for years

Stainless pipework left for years

(OP)
Hi if stainless steel pipework was installed, welded and NDT was carried out. Would it be ok to leave it for 5 years before use? If not why not?

RE: Stainless pipework left for years

Clean? Dry? Dehumidified? Isolated from bugs, critters, debris, shock, corrosion/electro-galvanic problems? Covered completely or buried or in mid-air?

Power plants have been left in-place for years as construction proceeded elsewhere or projects were delayed/defunded. Ships have been left dehumidified and moth-balled for years before re-use. Others have rusted out and become useless in just a short time.

But re-use repair and cleaning and the initial preservation HAVE to be very good.

RE: Stainless pipework left for years

It would be great if you could remove internal moisture, and seal it up with a nitrogen blanket.

The main threat to SS systems is chlorides. Pools of water somehow collect salts and can discolor ar sometimes eat through SS.

An external painting system should be considered for long term layup.....

RE: Stainless pipework left for years

Is it coated, buried, bare, exposed to salt water, CP protected?

"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek

RE: Stainless pipework left for years

(OP)
Thank you for the reply. It is basically just going to be sat on concrete not covered. The only work going on around it would be electrical work.

RE: Stainless pipework left for years

Why would you purposefully purchase, fabricate and install a piping system five years early ??

I still maintain that a 5 psig nitrogen blanket would be a good investment.....

RE: Stainless pipework left for years

(OP)
Because if we dont we would have to chop the 8 tonne tanks in half to install them. Either that or do a verticle lift. I would personally go for a verticle lift through some penetrations in the levels but some people have deamed it as unsafe. So a nitrogen blanket inside and maybe wrap the outside in some nice wax wrap or denso tape?

RE: Stainless pipework left for years

Denso....Now there's a bell from the past. We used to wrap whole plants in it! Great for sealing low pressure leaks too! Did not know you could still get the stuff!!!

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!


Resources