API 526 table and D orifice
API 526 table and D orifice
(OP)
I have following scenario for a safety valve.
MAWP = 240bar g, set pressure = 240 bar g, operating temperature = 50 deg c, relieving temperature = 580 deg c., over pressure = 21% and valve body material is carbon steel. Vendor has calculated and selected 1.5D3 valve with 2500# x 300# rating. Vendor says that 2500# rating is selected based on API 526. Can anybody explain me how to cross check this with API 526 table 3? Why I can not select 1500# valve? Thanks in advance.
MAWP = 240bar g, set pressure = 240 bar g, operating temperature = 50 deg c, relieving temperature = 580 deg c., over pressure = 21% and valve body material is carbon steel. Vendor has calculated and selected 1.5D3 valve with 2500# x 300# rating. Vendor says that 2500# rating is selected based on API 526. Can anybody explain me how to cross check this with API 526 table 3? Why I can not select 1500# valve? Thanks in advance.





RE: API 526 table and D orifice
Also, I assume that you made a typo in your relieving temperature of 580 deg C.
RE: API 526 table and D orifice
http://global.ihs.com/
However, go to table 2 and have a look. Actually if your temp. is right (a very hot fire case indeed) then you may actually be out of the table even with "exotic" materials. But the vendor may be able to overcome that.
Best regard
Morten