Piping Material Specification 12PD0H01 Class 125, High Density Polyethylene (HDPE) Fire Water (FM Approved) (Underground)
standard by Process Industry Practices, 05/01/2007

Piping Material Specification 12PD0H01 Class 125, High Density Polyethylene (HDPE) Fire Water (FM Approved) (Underground)
standard by Process Industry Practices, 11/01/2000