Radiography requirement for Hydrocarbon service
Radiography requirement for Hydrocarbon service
(OP)
Dear members
In one of our project specifications for Piping the requirement for Radiography is spelt as under:
"100% of welds in hydrocarbon service shall be radiographically inspected.This shall include all lines classified as process lines,instrument gas,utility gas,diesel fuel,fuel gas,blanket gas( if hydrocarbon)and utility oils as defined in technical requirements"
The query is whether disel and utility oil lines fall under hydrocarbon category? Is there any broad definition in codes as to which service lines are classified as hydrocarbon service.
Any help will be appreciated
Thanks in advance
sree60
In one of our project specifications for Piping the requirement for Radiography is spelt as under:
"100% of welds in hydrocarbon service shall be radiographically inspected.This shall include all lines classified as process lines,instrument gas,utility gas,diesel fuel,fuel gas,blanket gas( if hydrocarbon)and utility oils as defined in technical requirements"
The query is whether disel and utility oil lines fall under hydrocarbon category? Is there any broad definition in codes as to which service lines are classified as hydrocarbon service.
Any help will be appreciated
Thanks in advance
sree60





RE: Radiography requirement for Hydrocarbon service
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RE: Radiography requirement for Hydrocarbon service
Your problem is, probably, how to exactly perform or read the test in detail, or to contain the cost or timeframe for this particular project.
As 100% is 100%, you have to discuss your problems and alternatives, economical and practical, with the responsible person for the project, to get approval for any changes or particular details.
RE: Radiography requirement for Hydrocarbon service
more info,
http:/
http://www.nist.gov/srd/PDFfiles/jpcrd351.pdf
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RE: Radiography requirement for Hydrocarbon service
RE: Radiography requirement for Hydrocarbon service
utility oil normaly is fuel oil so a hydrocarbon
your piping requirement seems to me perfectly clear.
What can be questionable is the rx percentage which normaly is defined on ASME B31.3
RE: Radiography requirement for Hydrocarbon service
Thanks to everyone for the valuable inputs.
sree 60
RE: Radiography requirement for Hydrocarbon service
RE: Radiography requirement for Hydrocarbon service
Might also want to let him know the cost delta had he had some good engineering and constructability input early.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Radiography requirement for Hydrocarbon service
The 100% radiography requirement of virtually all piping seems to me to be a huge waste of time and money. This is what happens when you hire a temp employee to write all of your important specifications and his supervisors all have MBAs...
Obviously, this requirement was written by someone who doesn't understand what radiography is, how it will slow down a project, and what kind of expense is involved.
It is impossible to radiograph small tubing.....
IMHO, 100% radiography is only justified in ASME "lethal" service.
None of the piping codes/standards require this for hydrocarbon service at moderate temperatures and pressures.
(See ASME B31.1 and B31.3 for inspection requirements)
My opinion only..
-MJC
RE: Radiography requirement for Hydrocarbon service
Actually 100% x-ray is not unusual at all and this kind of spec is not what you get from temp employees, well ... except for including the 2" and less. It is almost universal offshore and on any serious large diameter pipeline project I've worked on in the last 15 years, where newly trained welders from unheard-of corners of the Earth are coming and going and you never can be sure if they're current or not.
With environmental cleanup costs of well over $ 1,000,000 USD/BBL, not to mention actually killing animals or people or chancing polluting groundwater supplies, the extra insurance is well worth the minor additional cost of x-ray film. How much is that in comparison to what you just paid for a bad weld and ...its faster than coating the joint anyway, so where's the holdup, what's the problem?
IMO
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RE: Radiography requirement for Hydrocarbon service
I'll give 100% : 1 that BP's doing it.
http://virtualpipeline.spaces.msn.com
RE: Radiography requirement for Hydrocarbon service
http://virtualpipeline.spaces.msn.com