Difference between 100% RADIOGRAPHY & Full RADIOGRAPHY

[hemant solanki]

Dear All,

Could you please tell me what is the difference between 100% radiography & fully radiography? Is it clarified in ASME code?

Thanks,
Hemant Solanki

[Manish...@linde-le.com]

Dear Hemant,

100% radiography means all but weld joints have to be radiographed irrespective of thickness of plate or Pipe size .Hence,  Exemptions mentioned in UW-11 for Full RT  is not possible in case of  100% RT.
Full radiography means you can take advantage of exemptions mentioned in  UW-11.
ASME code specifies only Full,Spot and No radiography but not 100% RT .
Generally, Owner's specification calls for 100% RT .

Hope this will help.

 Regards,
Manish

"hemant solanki" <h_so...@rediffmail.com> Sent by: material...@googlegroups.com 13/10/10 10:56 Please respond to material...@googlegroups.com

To <material...@googlegroups.com> cc Subject [MW:7527] Difference between 100% RADIOGRAPHY & Full RADIOGRAPHY

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[Ramprasad Chari]

Check UW 11 Cl 4.0 under "full radiography" in ASME Section VIII Div 1

100% radiography means ALL BUTT WELDED joints

Regards

Aarpee

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[sevak hiren]

100% stands for RT for all butt welds

 

Full radiography is defined in UW-11 of ASME Sec. VIII (Not 100%)

 

But the only confusing sentence in code is as mentioned below.

 

UW-52 SPOT EXAMINATION OF WELDED JOINTS

NOTE: Spot radiography in accordance with these rules will not ensure a fabrication product of predetermined quality level throughout. It must be realized that an accepted vessel under these spot radiography rules may still contain defects which might be disclosed on further examination. If all radiographically disclosed weld defects must be eliminated from a vessel, then 100% radiography must be employed.

 

Regards

On Sat, Feb 16, 2013 at 10:41 AM, Ashay Kadam <kadam...@gmail.com> wrote:

Full radiography is equivalent to RT-1 stamping as defined in UG-116. As you can see, butt welds in small (not exceeding 10"), thin wall nozzles are not required to be RTed.

100% RT means all butt welds, including those in small nozzles will have radiography examination in full length. This is not a code requirement. It is usually a service requirement. Vessels in wet H2S service often require 100% RT.

Full radiography need not be 100%  See UW 11(a)(5)(b). 

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