weld lines & opening distance in api 620 1

[shakila21]

hi
what is the reference for weld line distance in Api 620? distance between openings and distance between nozzles and weld line? which part of api is refering to this?
I just found 5.14.5 in api620 which says min 6in distance is required between nozzles to any discontinuity. I wanna know how much distant should be between all nozzles?
could any one please help me?

 

[JStephen]

See Section 5.17, also 5.27.10 for flush nozzles. Note that 5.16.5.1, definition of E', contains some allowance for nozzles passing through a weld, similarly for definition of tr in Fig. 5-7.

 

[shakila21]

thank you very much Stephan. actually I`m a beginner in api620 and I could not find any source to learn it. since api 620 is complicated for me I`m looking for some books or source like "PTB asme section viii example manual" for api 620 unfortunately I could not find anything. do you know any book which could help learning api 620 faster?