Quote Originally Posted by DJ Q View Post
Could anybody share the 6th edition of API 521?

As outlined in the attached presentation, there are a few deviations from EN/ISO 23251. The two standards were basically identical up to the 6th edition of API 521.

Many thanks in advance.
API STD 521-6th Ed.-JANUARY 2014-Pressure-relieving and Depressuring Systems

uploaded here:

[link Point to another website Only the registered members can access]