2 replies to this topic

[quote name='taaayib' date='May 16 2007, 02:56 PM' post='10950']
Hi All,

Im a budding engineer in the oil & gas field. Currently im preparing Linelist for a project.

In the list im advised to fill the radiography percentage for every line thts been involved.

i filled those cell as 10%( in my clients specification they suggested tht lines below 600# shall be 10%

radiographed and lines above 600# and those connecting with rotating equipments should be 100%

radiographed)????????????


can anyone help me as soon as possible.

thanks in advance.

[gvdlans]

Your question is not very clear but I assume you want to ask:
1 What does radiography mean in the context of pipes?
2 What does 10% or 100% radiography mean?

A pipe or pipeline consists of a number of pipe sections, elbows, reducers or other fittings that are welded together. In order to confirm that a weld does not contain cracks or other weak point, the weld can be radiographed, meaning that an X-ray picture is taken of the weld. See http://www.yxlon.com...ection_in_field and http://www.yxlon.com...tion_production for example pictures. This is not much different from X-ray pictures taken at the hospital to see whether your arm or leg contains cracks...

Radiography is a form of Non-destructive Testing (NDT) of materials

10% radiography means that 10% of the welds in the pipe are X-rayed. Lines that are more critical/hazardous in general need a higher percentage of radiography.

By the way, why didn't you ask your lead engineer/supervisor what radiography means? It is part of his/her job to make sure you know what you are doing...

And what is a "budding engineer"?

[JEBradley]

A budding engineer is someone just starting out in the field and who aspires to grow into a fully fledged engineering expert - you know, like a bud that grows into a flower.

(always like to help out with these technical questions)