Flush Cleanout Sizes 2

[curlyjackme]

Similar to a post below about the large man way, I have a client asking us to bid a tank with an extremely large flush clean out. It is to be 60"x72" to be exact. Now API 650 5.7.7.2 it clearly states that the maximum height for a flush clean out is 48" for Group I thru IIIA, and 36" for groups IV thru VI. The one thing that is a little unique here is that the tank is actually 316L. But even in Annex S the only requirements for a flush clean out is in S.3.6.3. And it only allows for the thickening of the components in relation to the yield strengths at the design temps.

My question is can the large flush clean out be installed in the tank (with good engineering practice)and the tank still be stamped API 650.

I am saying no, due to the word SHALL in 5.7.7.2. My understanding has always been if it says shall then it is a definite requirement for the tank to be stamped with an API 650 name plate. If the standard says should then you have lee way with the design per a customers request.

Any thoughts or information in appreciated.

CJ

 

[IFRs]

You are interpreting "shall" correctly.

To put an API 650 name plate on a tank, it needs to be in compliance with the API 650 standard.

As stated in the standard: "The Purchaser may want to modify, delete, or amplify sections of this Standard, but reference to this Standard shall not be made on the nameplates of or on the Manufacturer’s certification for tanks that do not fulfill the minimum requirements of this Standard or that exceed its limitations."

In your case, you can certainly probably a larger clean-out and a competent engineer can probably design it with little risk of failure but the name plate on the tank should not include "API 650".

 

[curlyjackme]

IFRs Thanks for the reply, Just wanted to make sure I was understanding the wording correctly.