4. .4 Preheat and Interpass Temperature. The mini mum preheat and interpass temperature should be
estab lished on the basis of steel composition as shown in Table 3.1. Alternatively,
recognized methods of predic tion or guidelines such as those provided in Annex I, or other
methods may be used. Preheat and interpass tem peratures lower than required per Table 3.2 or
calculated per Annex I may be used provided they are approved by the Engineer and qualified by
WPS testing.