×
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

Pickling and Passivation

Pickling and Passivation

Pickling and Passivation

(OP)
Hi dears
Generally,Is pickling and passivation in mandatory for all new unit?
we have some new unit with amine or other media that include H2S!!

RE: Pickling and Passivation

in my opinion this is not a "mandatory" requirement for SS , i  mean it depends on the standard and requiremtn of your client or company, but is more a good engineering practice.

S

Corrosion Prevention & Corrosion Control
 

RE: Pickling and Passivation

ditto Strider's comment.

In many applications it doesn't matter, in a lot of them it is critical.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Pickling and Passivation

(OP)
Thank you
but please tell me more explanation.
Which item is (more) critical?
-Media
-Material
-Temp.
-Old or new unit

 

RE: Pickling and Passivation

the "more cirtical" are the equipments that will work in a corrosive environment, for example if you have a fluid with water is more critical than an oil or gas that is not corrosive..but his is a general rule..
what is the service of your equipment?
www.corrosionist.com/cleaning_stainless_steel.htm

http://www.google.com/cse?cx=010231287511253103195%3aqmfpcvv02be&cof=FORID%3a1&;q=passivation+stainless+steel

S
 

Corrosion Prevention & Corrosion Control
 

RE: Pickling and Passivation

(OP)
I told in my question. I am talking about a unit (RHU) and we have several equipments with difference service. But I know that there are some amine media and other service that we have to follow NACE MR0103 in some equipment. (H2S service)

 

RE: Pickling and Passivation

Generally, for refinery process equipment (as opposed to utility equipment) it would be considered 'customary' to perform post fabrication cleaning to remove welding heat tint, crayon marks and other similar disfigurations that could act as initiation sites for corrosion.  There is no need for pickling AND passivation. Pickling will remove heat tint and give the optimum surface condition.

Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
 

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