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[MW:25531] API 6A, DESIGN VERIFICATION REPORT CLARIFICATION

By Materials & Welding

Dear Experts



Good day to all.
I reviewed a DVR as per the attached, 

Design parameters:- 
Max working pressure 5000 psi.
Design temperature -20 deg F to 250 deg F.
Service Sour 
Service Material class EE NL.

Here, SERVICE of the product is as below,
EE denotes sour SERVICE=SAME AS DESIGN REQUIREMENT.
N denotes -50 to 140 deg F. & L denotes -50 to 180 deg F.
So we can combine and get NL as -50 to 180 deg F. NOT SAME AS DESIGN REQUIREMENT.
MY QUESTION IS -
DOES THIS PRODUCT SERVICE MATCH WITH DESIGN REQUIREMENT? 
Do we need to change the lower/higher temperature limit of design/service or it can be the same?

Please give your valuable. comments on this subject.

Regards 
Raj 



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