×
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

Air Reciever Tanks Fabrication

Air Reciever Tanks Fabrication

Air Reciever Tanks Fabrication

(OP)
Hi all...
     I work as a Detailer with a company which supplies pre-fabricated piping for process plants. The company is building a new facility now.
Yesterday I received 2 vague drawings of air receiver tanks (for the new facility) and my boss told me we are going to fabricate these
2 air receivers here!!!
We don't do PV fabrication and we don't have U stamp certification either.
What they might have done is, they have copied some drawings which were readily available in the internet and decided to proceed with the
fabrication of them. Now detailing those 2 vessels is my responsibility. Though I have some knowledge on PV design and detailing, I really
wonder if it is ok fabricate just with some drawings (without doing design and analysis).  
QA/QC manager argues "We do not have to Code Stamp these Air receivers if we are the end buyers.
We'll only follow all ASME Sec VIII Div 1 requirements for Fabricating them with our internal Quality Checks"
 
I would greatly appreciate if you could assess this scenario to me coz if anything goes wrong, I'l be the "scapegoat" in the "Blame game".


Below are the details...

2 Air Receivers 1 for 2500 gal. and the other is for 5000 gal.

2500 gallons receiver--
Dia 60"  
Height 235" (approximate LOA)
shell .25 Nom SA455  
Heads .312 Nom SA516 Gr 70 matl.
Working pressure 150 psig


5000 gallons receiver
Dia 72"
Height 235" (appr. LOA)
Shell .375 Nom SA455
Heads .375 Nom SA526 Gr 70
working pressure 150 Psi


(If anyone can provide me any specific drawings for these would be a lot helpful.)


 

RE: Air Reciever Tanks Fabrication

You might check if your state regulates pressure vessels.  And check with your safety people to see if there's an OSHA requirement or any internal policies that would require ASME stamping on vessels.

RE: Air Reciever Tanks Fabrication

Check with your insurance carrier to see if they will accept this.

rmw

RE: Air Reciever Tanks Fabrication

Figure out if this is legal and legit before you do anything.  Air receivers that size are regulated by somebody- doubt you'll be able to do these "non-code".  Merely having ASME IX qualified welders, which it sounds like you do, isn't enough.

RE: Air Reciever Tanks Fabrication

shafmech,

In what state will these vessels be fabricated ?

Where will they be installed ?

   

RE: Air Reciever Tanks Fabrication

(OP)
Thank you all for your comments.
I have partly been able to convince the higher ups here about the regulatory issue and they are now looking out for some design firm to deal with this...

Vessels are fabricated and installed in UAE/Arabian Gulf.  

RE: Air Reciever Tanks Fabrication

Air receivers are a pretty "standard" item made by many firms.  I would think it would be simpler to just buy from a regular producer of these items, even if they have to modify them slightly for your needs.  Then you get all the stamps, approvals, etc....

RE: Air Reciever Tanks Fabrication

jdarco:  agreed.  We have our own U stamp and even we wouldn't bother to make receivers like these.  There are people who mass produce them and we couldn't compete.

RE: Air Reciever Tanks Fabrication

It is a good thing that there are not too many people with the same mentality as your boss.  Follow the above responders' advice.

RE: Air Reciever Tanks Fabrication

This is how we still have catastrophic vessel explosions.  Rarely, in the last few decades, but they still occur.

The stored energy at 6 atmospheres in a 1M dia x 2M long air tank is similar to a kilo of TNT.  Ask the boss ifhe minds if you start working with TNT, since there are no pesky ASME or EN Codes to comply with in the country you folks are working.  Nothing to forbid engineering foolishness.  

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