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  1. pdnachocivicos

    Max. fr values in UG-37

    Hi all, I'm trying to clearly stablish reinforcement needs for both cylindrical vessels and unstayed flat heads, according to UG-37. According to UG-41(a) limits, fr1,fr2,fr3 and fr4 values to be considered in UG-37 shall never be over 1, isn't it? If vessel/head wall was made from AISI 316L...
  2. pdnachocivicos

    "50%" meaning in UG-39(b)(2)?

    Thank to you all! Prex, sorry for my mistake: yes, I meant "2 > p/dave >= 1 1/4". Following the orientatin from prex and Duwe6, thus I expect that the situation for my flat head depicted in the pdf attached would work: t = 18 mm, trepad=10 mm, p/dave = 1.9 Areq1 = Areinf1 = 432 mm² Areq2 =...
  3. pdnachocivicos

    "50%" meaning in UG-39(b)(2)?

    Dear unclesyd, thank you for your fast reponse but, unfortunately, after having carefully read this document, I did not find any example of such case in it. Could anyone provide a detailed example? J.I.G.C. Chemical Engineer
  4. pdnachocivicos

    "50%" meaning in UG-39(b)(2)?

    Hi, I have two openings in a flat head with spacing below 1 1/4 their average diameter, thus the statement "the required reinforcement for each opening in the pair, as determined by (1) above, shall be summed toguether and then distributed such that 50% of the sum is located between the two...

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