×
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

Pressure Vessel Standards

Pressure Vessel Standards

Pressure Vessel Standards

(OP)
I am looking for the ASTM (or other) standard for pressure vessel design and safety considerations.  Specifically, I want to know if there is a recommended factor of safety for pressure vessels -- I remember it to be 3, but I can't recall from where. -- and proof testing methods, including frequency.  In other words, before I put the pressure vessel in use, to what pressure must I test it for leaks?  Once the vessel is in use, how often do I have to inspect it: 90 days, 180 days, yearly?

I searched the ASTM web sight by title ("pressure vessels") and came up with 112 possible standards.  I could really use some help in narrowing my search.

The vessel will be made of stainless steel, hold a volume of 19 in^3, and be used in a hydrostatic test fixture as an accumulator that can see 40 ksi.

Thanks in advance,

--Scott

RE: Pressure Vessel Standards

Dear colleggue

You ca review on ASME secc VIII Div 1 or 2 for the new vessels . When this in service Checking codes NBIC NB-23 and API 510.The pressure of design which is?

Regards

jorge@tecnicontrol.com.co

RE: Pressure Vessel Standards

If you are in the USA almost each state have a series of laws, and rules for Pressure Vessel. Contact your Chief Inspector in the  State.  In addition, your insurance carrier may have rules or recommendations.

another source -
http://www.nationalboard.org
The National Board of Boiler and Pressure Vessel Inspectors
Promote greater safety through uniformity in the construction, installation, repair, maintenance and inspection of boilers and pressure vessels. The standards themselves are not on-line and must be ordered. Includes links for ordering the standards of Canada, Europe, and Great Brtain.

RE: Pressure Vessel Standards

Hi, I have a similar problem to Scott, in that I need a factor of safety for pressure vessesls and am finding it difficult to find. The pressure being applied is 350Kpa and the vessel is similar to a picture frame with dimensions of 480*300*25mm dimensions

Thankyou

RE: Pressure Vessel Standards

As I recall, pressure vessels are usually tested to 125% of design.  Check ASME Section VIII.

RE: Pressure Vessel Standards

I seem to remember a company I used to work for also tested to 125% MEOP (maximum expected operating pressure) for proof testing.

RE: Pressure Vessel Standards

(OP)
This link is from the Lawrence Livermore National Labs, but they follow the NBIC and ASME.

www.llnl.gov/es_and_h/hsm/doc_18.03/doc18-03.html

Basically it states that you have the maximum allowable working pressure (MAWP)=100%.  The maximum operating pressure (MOP)=80-90%.  Test pressure for inert or remote operations systems = 120-125%.  Test pressure for pressure vessels and reactive pressure systems = 150%.

--Scott

RE: Pressure Vessel Standards

To Swertel and hdiab,

Please note carefully:

1. The test pressure(hydrostatic)= 1.25*Pd*Sa/St, where Pd=Design Pressure, Sa=allowable stress at ambient temp., St= allowable stress at design temperature. This is in accordance with the current ASME Sec. VIII Div.1.The allowable stresses for the selected material must be taken from ASME Sec. II D.
2. The factor of safety is app. 3.5 if vessel is designed in accordance with Sec. VIII Div.1 and 3.0 if vessel is designed to Sec. VIII Div.2.
3. If you have not designed a Pressure Vessel before, please employ an experienced agency/ consultant/ vessel manufacturer to do it for you. There are quite a few things involved which you will not be able to learn overnight.
4. Hope it helps. I will be glad to answer any of your specific queries on the matter.
5. I suggest that "ASME" thread is a better place to post similar queries.
 

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