Annular plate

[basem elabd]

Dear all

Are the but welding joint in annular plate of tank must be RT or not as per API 650?

Thanks

[Samy]

API Calls the below:

6.1.2.9 When bottom annular plates are required by 3.5.1, or by M.4.1, the radial joints shall be radiographed as

follows: (a) For double-welded butt joints, one spot radiograph shall be taken on 10% of the radial joints; (b) For single-welded butt joints with permanent or removable backup bar, one spot radiograph shall be taken on 50% of the radial joints. Extra carc must bc cxcrciscd in thc intcrprctation of radiographs of single-welded joints that have a permanent backup bar. In some cases, additional exposures taken at an angle may determine whether questionable indications are acceptable. The minimum radiographic length of each radial joint shall be 150 mm (6 in.). Locations of radiographs shall preferably be at the outer edge of the joint where the shell-plate and annular plate join. 

 - 3.5.1 clarifies the group classification

-  M4.1 Clarifies the tank dia.

Hope the above clarifies.

[Sangram]

Dear Basem

Yes as per API-650 you need to be radiograph at least one spot on 50% of total joints.

Regards 

Sangramkeshari Routray 

Welding inspector 

Sent from my iPhone

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[basem elabd]

Dear, sangram

What the meaning of radial joint ?

Thanks for your cooperation 

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/890DE5AF-2731-4DD0-888E-3D0625358EFC%40yahoo.com.

[Basel Salih]

When you use Annular Plate around the bottom plate there are 2 type of joints 

1- Circumferential weld between Annular and Bottom plate.

2- Radial Weld between each of 2 Annular plates .

On Monday, September 9, 2019 at 12:31:02 PM UTC+3, basem elabd wrote:

Dear, sangram

What the meaning of radial joint ?

Thanks for your cooperation 

On Mon, Sep 9, 2019, 07:53 'Sangram' via Materials & Welding <material...@googlegroups.com> wrote:

Dear Basem

Yes as per API-650 you need to be radiograph at least one spot on 50% of total joints.

Regards 

Sangramkeshari Routray 

Welding inspector 

Sent from my iPhone

On 07-Sep-2019, at 12:08 AM, basem elabd <eng.ba...@gmail.com> wrote:

Dear all

Are the but welding joint in annular plate of tank must be RT or not as per API 650?

Thanks

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[Sangram]

Dear Basem

If you have 14 joints in one tank you have take 7 spots in any 7 joints . 

Regards 

Sangramkeshari Routaray 

Welding inspector 

Sent from my iPhone

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CACct1WF4-%2BVWE5By%2BpJGrdeT%3DL_GPqWZxEj1wPWQPV-ozFjdaQ%40mail.gmail.com.