MortenA
Chemical
- Aug 20, 2001
- 2,998
API 521 forms the basis of many relief systems workld wide - and the paradigme for depressuring "7 barg or 50% of design pressure within 15 minutes" is industry standard.
But API 521 sec 5.15.2.1 actually opens up for other methodes and refer to a report by a Norwegian consultancy adoped by STATOIL as a reference - and made public:
(free download - but you must give some personal info first).
In this report (sec 4.1) its stated that the 15 minutes is insufficient due to expected higher heat input that recommended by API - and that a short BD time is required (in an other section set to 8 min).
Has anybody (especially all of you from USA) taken a position on this? Its sort of self contradicting - even though i think that API feels they covered their rear by stating that the normal input equation assumes draining etc.
Best regards
Morten
But API 521 sec 5.15.2.1 actually opens up for other methodes and refer to a report by a Norwegian consultancy adoped by STATOIL as a reference - and made public:
(free download - but you must give some personal info first).
In this report (sec 4.1) its stated that the 15 minutes is insufficient due to expected higher heat input that recommended by API - and that a short BD time is required (in an other section set to 8 min).
Has anybody (especially all of you from USA) taken a position on this? Its sort of self contradicting - even though i think that API feels they covered their rear by stating that the normal input equation assumes draining etc.
Best regards
Morten
