×
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

PED - Simple Pressure Vessel discrepancy

PED - Simple Pressure Vessel discrepancy

PED - Simple Pressure Vessel discrepancy

(OP)
I am attempting to determine if a tank (pressure vessel) that I am shipping to Europe needs to be CE Marked.  The volume of the tank is 95 liters.  It will be charged to a pressure of 6.2 bars.  The contents will be a silicon-water mixture.  

The Simple Pressure Vessel Directive 87/404/EEC Article 3.1 indicates that the vessel should be CE Marked if it exceeds 50 bar-liter.  Bar-liter is detemined by multiplying the tanks volume by its pressure.  My tank will be 95x6.2 = 589 bar-liter.  The Pressure Equipment Directive (PED) 97/23/EC Article 3.1.1.(b) indates that the tank does not have to be CE Marked because it contains a non-toxic fluid <10,000 bar-liter.

Are there any suggestions on how to resolve this issue?  Do I need a CE Marked tank?  If I do not need the CE Mark, I will not get it because this is a special tank and I am not aware of any manufactures in the USA that will supply a CE Tank like this.

Thank You,
Bill Johnston

RE: PED - Simple Pressure Vessel discrepancy

If your vessel is 100% full of liquid (no gas pocket) and the vapour pressure at the maximum allowable temperature of equipment is not more than 0.5 barg, then CE marking is not required: the vessel is classified as SEP (Sound Engineering Practice) category, and it only needs to be accompanied by adequate instructions for use and to be marked to permit identification of an authorized representative in the EC.
Simple pressure vessels are limited to the containment of air or nitrogen (or liquids at low temperature with air or nitrogen pocket).

prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design

RE: PED - Simple Pressure Vessel discrepancy

The details above are correct, however, I would urge you to assess the PED (97/23/EC) very carefully.

What is the nature of the vessel? Is it an assembly? Does its final function cause it to be considered as a safety device? All safety accessories are classified as Category IV.

Article 3 identifies whether an item should be identified as SEP and CANNOT carry a CE mark, or if it should be marked.

The directive also states that (and I would urge you to look at the guidelines on this at http://ped.eurodyn.com , especially guideline 9.9) a vessel produced to sound engineering practice should be produced '... in accordance with the sound engineering practice of a Member State in order to ensure safe use.'

Hope this helps (though with the PED it rarely does).

Regards,

Fawkes

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