IHS is your source for the NB 23, the must-have code for any pressure
inspector in the industry. First written in 1946, the code covers the rules
and guidelines for in-service inspection, repair, and alteration of
retaining items. The ANSI approved NBIC is required in many US and
jurisdictions. It has a 3 year revision cycle with new information added
year through an addenda service. Order your copy today.