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  1. Pato12

    Maxium Desgin temperature, API 620

    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...
  2. Pato12

    Columns (unbraced length) and stiffing collars

    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
  3. Pato12

    Allowable stress for structural members - t/R ratio

    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...
  4. Pato12

    Flat roof?

    Hi guys, Just wondering can we have a flat roof in api 620. pato
  5. Pato12

    API 620, R3?

    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...
  6. Pato12

    R1 value, negative?

    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
  7. Pato12

    API 620 - R1 and R2 for a dome roof/bottom

    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...

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