Coordinates or mapping of pressure vessel during internal inspection

[mariolucas75]

Dear Forum,

From your experience would you please advise me what might be the most appropriate or common way to establish a kind of coordinates when performing internal inspection let's say of cylindrical pressure vessel.... i mean - i found a corrosion "here and here" ... is there a common practice to record these locations?

If it is a horizontal cylinder it might be a bottom line (starting from one of the heads) as a reference having a perpendicular arcs for example ?
Also it to be a user friendly for many type of people who may work in tank ... blaster, painter, welder...


What would you suggest from your experience ?
THks

 

[LittleInch]

Take a marker pen / paint spray can and a camera.

Internal maybe define your start point for the main cylinder as one end at the base and refer length from there and distance from there as a circumference location plus or minus.

Then you can lay out the plan like a flat plate with the base line down the centre.

The ends start from the centre and note angle and distance from the centre to the location (easy to measure with a tape)
Again draw as an orange peel type drawing or similar



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[RadiateurFou]

There is a good youtube chanel of an experienced guy that does pressure vessels inspections. He explains in some videos how he takes notes of corrosion and stuff. Search "Mr Eric"