Previous in Forum: bronze valves   Next in Forum: pressure sensitive adhesives
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
3 comments
Rate Comments: Nested
Anonymous Poster

CHEMICAL CLEANING

07/07/2008 8:37 PM

Hi Guys

We are currently working with petrochemical projects, and we have to clean the welding joints in steel A 347 , made in the pipes within the heat exchanger chamber (it seems like stainless), the dirt is a black shadow, we tried NITRIC/ETHANOL, but it didnt work.

Israel Barron

ibarron@sfmex.com

Thanks in advance
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Kilgore Trout
Power-User
Hobbies - HAM Radio - New Member United States - Member - New Member Hobbies - Hunting - New Member

Join Date: Jun 2008
Posts: 440
Good Answers: 7
#1

Re: CHEMICAL CLEANING

07/07/2008 11:21 PM

Not too sure but the best de-greaser I have ever used is FIST--www.petromarineservices.com/southeas.htm

If you don't dilute it enough it will lift grease and deposit it inches away from where you started. Wear gloves and certainly don't breath or ingest it. I don't know if it will leave a film or not--but I would try it before resorting to brake cleaner as most of it can produce fosgene gas.

The surface, is it greasy--rusty---or what?

__________________
 Those who believe in telekinetics, raise my hand --Kurt Vonnegut Jr.
Reply
Anonymous Poster
#2
In reply to #1

Re: CHEMICAL CLEANING

07/08/2008 6:11 PM

Hi Friend

Is like dirt (blue-black layer)produced during the welding process (GTAW)to join them.


Israel Barron
Reply
adamchen
Member

Join Date: Jul 2008
Posts: 6
#3

Re: CHEMICAL CLEANING

07/10/2008 4:51 AM

what type of dirty?

oil? grease? or other things?

that's many cleaner canbe choose.
Reply
Reply to Forum Thread
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

adamchen (1); Anonymous Poster (1); Kilgore Trout (1)

Previous in Forum: bronze valves   Next in Forum: pressure sensitive adhesives

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Chemical & Material Science:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (69 right now)
Show Members
Advertisement