RT Web Page SR Electronic(1) ID 15308451 A1 A. Illingworth T1 Nondestructive testing YR 2015 FD 2015-12-22 NO Nondestructive testing, of heat exchangers PB Begell House Inc. PP New York DO 10.1615/hedhme.a.000451 RD 2025-05-15 UL https://hedhme.com/content_map/?article_id=451&link_id=15308 WT HEDH Multimedia - Heat Exchanger Design Handbook, Multimedia Edition WP 2015-12-22