US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-67 — SAFETY STANDARDS FOR PROCESS SAFETY MANAGEMENT OF HIGHLY HAZARDOUS CHEMICALS296-67-289WAC 296-67-289WAC 296-67-289. Appendix B—Block flow diagram and simplified process flow diagram (nonmandatory)Last amended: 1992Year: 2026Length: 12 wordsOfficial source example of a block flow diagram example of a process flow diagramPreviousWAC 296-67-285NextWAC 296-67-291