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API 650 Addendum 4

API 650 Addendum 4

API 650 Addendum 4

(OP)
I have 2 questions regarding this Addendum.

1) What is its exact date if issue ?
2) What are its implications if compared with previous  API650 tanks ?

Thanks,
Theo van Adrichem

RE: API 650 Addendum 4

You'd have to look on the Addendum itself for the dates.  If you have the otherwise-current API-650, you should be able to download the Addendum 4 for free (although it is in fact, an entirely new API-650- every page, not inserting pages).  You'll have to contact API for this.

Implications- Wind design is changed, allows thinner shells but requires anchorage in more cases; seismic is all changed up, and requires seismic design in wider areas; some new material such as vacuum design added.

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