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1. ASME codes edition is issued once in 3 years and addenda, once a

year – both on 1 July. Edition and addenda become effective on 1st

January of next year (i.e.,  months after issue!.

". ASME Sec #$$$ %iv.1 is &nfired 'ressure #essel and is alicable to

ressures exceedin) 1* si), and diameters above .+. 'um and

turbine casin)s are excluded from scoe.

3. -hicness of cylindrical shell t / 0

2. on)itudinal 4eld is more critical because it is sub5ected to double

the stress than irc. 6eld.

*. 76eld 5oint cate)ories8 A, 9, , % – are based on 5oint locations in

the vessel and stress levels encountered 4eld -yes8 (tye 1, ", 3 :

etc.! describe the 4eld it self.

. %eths of ";1 Elli and hemish. heads are %<2 and %<"

resectively. (%/ =ead diameter.!

>. 6eld Joint cate)ories;

 ate)ory A; ? All lon)itudinal 4elds in shell and no@@les.

  ? All 4elds in heads, =emish?head to shell 4eld

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$% & 0.6P

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ate)ory 9; ? All circumferential 4elds in shell and no@@les,

? =ead to shell 5oint (other than =emish.!

ate)ory and % are flan)e 4elds and no@@le attachment 4elds

resectively.

. 6eld -yes;

  -ye 1; Bull enetration 4elds ( -yically %ouble 4elded!

  -ye "; 6elds 4ith 9acin) stri.

  -ye 3; Sin)le 4elded artial enetration 4elds.

  -ye 2, *, are various a 4elds (rarely used!

C. Bor full enetration 4elds (tye 1!,

  Joint efficiency, E / 1++D, *D, >+D,

  Bor the radio)rahy / Bull, Sot, il resectively.

1+. Fadio)rahy marin) on name lates (tyically for -ye?1

4elds!

  F-?1; (E/1! All butt 4elds – full len)th radio)rahy.

  F-?"; (E/1.+! All at. A 9utt 4elds Bull len)th , at 9,

sot

  F-?3; (E/+.*! Sot radio)rahy of both at A and 9

4elds

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  F-?2; (E/+.>! 'artial < o radio)rahy

11. Bor seamless heads, E/1, $f head to shell 4eld is fully radio)rahed

( if at. A!, and at least sot radio )rahed (if at. 9!

1". Bor 6elded =eads for E/1, all 4elds 4ithin the head reGuire full

len)th radio)rahy (since they are all at A 4elds! and head to shell

4eld is fully radio)rahed (if at A!, or at least sot radio)rahed

(if at. 9!

13. omared to ylindrical shell, thicness of ";1 Ellisoidal head is

arox. same as shell, =emish. head arox. half and -orish head

is >>D hi)her.

12. MA6' is calculated for; 6orin) condition (=ot H orroded!. #essel

MA6' is al4ays taen at the to of the #essel and is lo4est of all

art MA6's ad5usted for static ressure.

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