Dear Friends

Please clarify my following doubt regarding API 610


1) Is it necessary to have both suction and discharge in single stress file to qualify nozzle by apply Annex F ?

2) How can I interpolate the allowable value for 5" nozzle as its not provided in the Table-5 ? or which equation used to find out the nozzle allowable?

3) Table 5 is covering allowable Up to 16 " nozzle only,where should I refer for above 16"nozzle allowable ?

4) IN 5.5.5 is stating that Annex F can be used if approved by the vendor ,but Annex F.1.2 is saying loads outside the ranges specified in the table 4 are also acceptable with out consulting with the vendor if conditions 'a','b',c are satisfied.these both statements are contradicting each-other which one is to be followed ?


thanx
Anu