API Standard 1104, 22nd Edition
API Standard 1104 22nd Edition with Sept 2023 Errata. The original 22nd edition book is softbound with glue(see photos). It applies to both new construction and in-service welding.
AWS 2.4:2020 STANDARD SYMBOLS FOR WELDING, BRAZING, & NONDESTRUCTIVE EXAMINATION
DONT be fooled by their low price.