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10 mBar, is my operating pressure. and 500-600 is my operating temperature. thanks for your reply guys I understand there is a degree of my own engineering judgement that has to be applied here because this tank is unique. I have designed other aspects of the system under high temperature in...

pressure vessels? hum this seems should wrong to me because the pressure requirements are no where that high to warrant a tank to be fabricated like a pressure vessel as my tank is just above ambient(slightly to avoid air entering) and is quite large.

Oh, would you happen to know what the name of the asme standard that includes high temperature storage tanks. I'm really lost and I cant seem to find it.

Hello, Just wanted to ask for your advice guys on the maximum design temperature of stainless steel tanks in API 620. Its says the following, "Its up to the purchaser to specify the maximum temperature, not to exceed the 120 deg C." Now in my case I need a storage tank that is at 500 Deg C...

Hi guys, l(the unbraced length) can this be measured from a support to a stiffing collar in the middle of the column? thanks for the help guys pato

So just wanted to confirm with what you were saying and no doubt I just confused to hell just now but here goes. When finding Y for the compression equations for structural members, the t/R ratio that governs Y is, t(thickness of structural member) / R (distance from compression member's...

I understand that but how they came to the T1 and T2 equations for a cone plate is by saying R1=infinity and R2=R3/cos(alpha) and putting them in the general equation of T1 and T2. What I don't understand is how is R2 varying with R3. I guess ill just form my own equation for the slant of cone...

Oh dam sorry I keep thinking this part of the forum is just for api 620. Im using API 620 - latest one with 2012 changes. Ive looked at older versions and they have the same table and definitions. I also curious is there a more dated version of this standard because I have noticed some typos...

Hi Guys,, Just wanted to confirm with other engineers here is the R in t/R, the outer diameter of the structure member in question? I copied the notes at the bottom of table 5.3, its says the following; "The variables in the compressive stress equations are defined as follows: l= unbraced...

Sorry for double posting like this, but Im just stumped designing a flat roof. Is there are T1 and T2 for flat plates? I was thinking it was just normal stress on there.

Hi guys, Just wondering can we have a flat roof in api 620. pato

Hi guys, Just wondering if someone could shit some light regarding R3 and with respect to R2. As I understand it R2 is a function of a(horizontal semi axis),b(vertical semiaxis) and x. (elliptical function mentioned in the standard 620) and R3 is R2/cos(half-apex-angle). I was trying to get...

Oh I see so this negative value of R1 only applies for double curvature type tanks. So with basic shapes like cylinders, domes and sphere without dents R1 is always positive? is that right? thanks in advance.

Hi Guys, Just wondering if someone could help explain what is meant by the R1 value of elliptical tank wall can be negative? regards, Pato

Hi guys, Me and my workmates are new to tank design and we find the description of R1 and R2 extremely confusing. The mention that R1 can be negative when is on the opposite side of R2 increases our confusion. We are basically having a hard to understanding where R1 and R2 are with respect to...