×
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

API 5L B at temperature between -10¦C/+70¦C

API 5L B at temperature between -10¦C/+70¦C

API 5L B at temperature between -10¦C/+70¦C

(OP)
Hi,
I didn't find informations about steel temperature test in API5L standard. I have to admit that my copy is not the original one ...
Any way, the question: can I use the API 5L B at temperature between -10ºC/+70°C in a PED 97/23/CE certified pressure tank.

Other specifications:
Diameter - Thikness
1" - 3.3mm
1"1/2 - 3.6mm
2" - 3.9mm

Fluid: air

External Pipe Pressure:
- nominal pressure, 6-10bar
- test Pressure: 15bar

Internal Pipe Pressure:
- environmental pressure
- 10bar for 1 second max
(the pipe is the outlet of a pulse valve)

PED (http://ped.eurodyn.com/)requiers:

"[...]
The permissible general membrane stress for predominantly static loads and for temperatures outside the range in which creep is significant must not exceed the smaller of the following values, according to the material used: (See Guidelines: 7/14)
- in the case of ferritic steel including normalized (normalized rolled) steel and excluding fine-grained steel and specially heat-treated steel, 2/3 of Re/t and 5/12 of Rm/20 ;
- in the case of austenitic steel:
- if its elongation after rupture exceeds 30 %, 2/3 of Re/t
- or, alternatively, and if its elongation after rupture exceeds 35 %, 5/6 of Re/t and 1/3 of Rm/t ;
- in the case of non-alloy or low-alloy cast steel, 10/19 of Re/t and 1/3 of Rm/20 ;
- in the case of aluminium, 2/3 of Re/t ;
- in the case of aluminium alloys excluding precipitation hardening alloys 2/3 of Re/t and 5/12 of Rm/20.
[...]"

And
"[...] a steel is considered as sufficiently ductile to satisfy [...] if, in a tensile test carried out by a standard procedure, its elongation after rupture is no less than 14 % and its bending rupture energy measured on an ISO V test-piece is no less than 27 J, at a temperature not greater than 20 °C but not higher than the lowest scheduled operating temperature. [...] "

Thans
Carlo Montagnani

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