×
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 Valve Ports

PED Valve Ports

PED Valve Ports

(OP)
I want to get PED for some valves (pressure accessories) but I am a little conjused over the port fittings. The valve uses SAE threads (3/4-16 UNF-2A) in accordance with ISO 725.
The problem is that the port fittings we use are rated by the manufacturer to 6000psi (412bar) and compliant with ANSI B1.1 and yet when I check the measurements of the fittings it also complies with ISO 11926-3 (Light duty stud ends) which are rated to a maximum of 4580psi (315bar). They do not comply with the ISO 11926-2 (Heavy-duty stud ends). The difference being the thread engagement.
I need to rate the valve to 5000psi (350bar). For PED can I accept the manufacturer's rating of 6000psi?

Fred

RE: PED Valve Ports

No, you favor the lower rating, 4580 psig maximum operating pressure.  If you went to 6000 psig then you are violating the ISO 11926-3 specification.

In general the fitting is the weakest part of the design, the weakest link drives the specification ratings.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

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