Is it permissible according to ASME Section VIII Division 1 for a single shell to be fabricated by rolling two pieces of plate, thereby incorporating two longitudinal joints (Category A)?
I don't think there are any limitations at all on the number of individual segments that can be used to fabricate a cylinder or a head in ASME Section VIII.
Interpretation: VIII-1-10-15
Subject: UW-9(d), Table UW-12 (2007 Edition, 2009 Addenda)
Date Issued: April 30, 2010
File: 02-3088
Question (1): Does Section VIII, Division 1 restrict the number of longitudinal welded joints that may be located in a single shell course?
Reply (1): No.
Question (2): Does Section VIII, Division 1 specify a minimum width between adjacent longitudinal weld joints located within a single shell course?
Reply (2): No.
Question (3): Does Section VIII, Division 1 dictate the sequence of assembly and examination in a single shell course when more than one longitudinal weld seam is employed (i.e., welding before or after rolling)?
Reply (3): No.