Piping Material Specification 6NM0B02 Class 600, Alloy 400 (UNS N04400), Butt Weld, 0.000" C.A. Oxygen Service
standard by Process Industry Practices, 03/06/2006

Piping Material Specification 6NM0B02 Class 600, Alloy 400 (UNS N04400), Butt Weld, 0.000" C.A. Oxygen Service [Complete Revision]
standard by Process Industry Practices, 04/01/2016