RT selection Criteria for API 650 tank

[Sam]

Dear experts,

please guide me exactly how many percentage and which area i should select for RT for API 650 tank for below joints.

1) shell verticle

2) shell horizontal

3) shell intersections (verticle to horizontal)

4) nozzles

i checked API 650 but not getting clear picture hence request to provide standard practice in this regard.

regards,

sam.

[Thota Kishore]

Dear Sam

Refer Para 8.1.2.2 and 8.1.2.3 in API 650.

It clearly states about the location and number of radiographs in tank.


Thanks & Regards,

T KISHORE
Engineer-QA/QC
+91 9951141681

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[Perumal Govindan]

Mr Sam,

Further refer also API 650 Section 8.1.1, 8.1.2.2, 8.1.2.9.

P Govindan

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[Perumal Govindan]

Mr Sam 

Refer API 650 Appendix T NDE requirements summary.

Regards

P Govindan

On Wed, Nov 6, 2013 at 12:24 PM, Sam <onlypri...@gmail.com> wrote:

[S DAS Arun RSHT-2]

Dear Sam,

Please find below the extract from API 650.

 

 

 

Hope this will help is interpreting the requirements.

 

Regards,

 

Arun

 

 

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[Sam]

thanks to all.

just little doubt. 

our bottom shell course requirement is 10mm as per drawing but plate shows more than 10mm actually say 10.5 mm. then do we need to apply RT criteria for more than 10 mm or not ?

[Mervin]

Dear mr sam

You can refer the api-650 clause 8.1.2.2 a&b and 8.1.2.3 as mention on this paragraph only spot RT for vertical & horizontal in the 1st 3mter and we use the standard in aramco for intersection joints on top angle to shell.

Vin

Sent from my iPhone

[Perumal Govindan]

Mr. Sam,

Review the MTC of plate material and tolerance of specific heat / lot number and then identify the thickness of the lowest shell course thickness.

For lowest shell course, one spot radiography on every vertical joint.

Hope this will clarifies your doubt.

P Govindan   

[Devang Majithia]

 

Extract taken from API 650. Refer Figure 8.1

 

Regards

Devang Majithia

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[Abd Ur Rehman]

Dear expert 

please guide , what it means to  25 % of which shall be at intersections.

Best Regards,

Abd Ur Rehman

QA/QC Engineer

[raj kumar]

In my view, 25%of total intersection/tee joints . 

However if we take 100% RT in Tee joints.No need consider intersection.

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