%RT and %PT for NDE pipe

[songkarn]

Dear sir,
I have some question about %RT or %PT of pipe line.
Is this % of all joint for complete route line or all joint each sheet for the isometric drawing?
Example .
RT 10%
Case 1
Isometric sheet. 1) have welding joint 2 DB = RT 1 joint
Isometric sheet. 2) have welding joint 20 DB = RT 2 joint
Total RT = 3 Joint---> Correct?
If,Case 2
Isometric sheet. 1) have welding joint 2 DB = 1 joint
Isometric sheet. 2) have welding joint 2 DB = 1 joint
Total RT = 2 Joint---> Correct?

If,Case 3
If i can redesign in case 2 to one isometric drawing
I will have RT = 1 joint ----> correct?

SK.

 

[bimr]

Would depend on whatever code that you are complying with, wouldn't it?

 

[XL83NL]

Pipeline or piping? What does your engineering specifications (& contract) dictates, apart from what bimr already correctfully mentioned?

 

[weldstan]

It will depend on the Code and added Contract requirements. Normally, RT is defined by the contract for the entire project - not by each iso.

 

[nkvon]

If project spect not mention, Normally it will separate per line class, but for easy to control you should choose RT joint per ISO not per sheet, example iso have 5 sheets and 56 joints, you choose 6 joints, that enought