Acceptance for bottom plate of storage tank (API 650)

[Vishal Sharma]

Dear Experts,

We found 42 mm distortion in bottom plate after welding with shell. Is it acceptable? Please share reference standard. 

Please note tank fabrication is going on within shop.

Br,

Vishal Sharma

[Mohd Siraj]

Check peaking and banding requirement.

[Bala Murugan]

Dear Friend,

As per API 650, Cls 7.5 it was mention in dimension tolerance topic
that The bulging of bottom plate shall not exceed .25% of dia of tank
(for tank dia <40m) unless otherwise mentioned. 100mm max. for tank
dia >40m.


Thanks,
Bala

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[Mian gee]

Mr.bala murugan,

                             

             you are giving the wrong reference, this statement is not mentioned in the api 650, please clarify your reference,

[Usman]

There is no requirement in API 650 for flatness of bottom plates.
Sent from my iPhone

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