This document covers safety procedures for working with gas cylinders and high pressure equipment. It discusses selecting appropriate materials based on factors like pressure, temperature, and corrosion resistance. Standard operating procedures address installing pressure gauges, avoiding rapid pressure changes, properly earthing pipelines, and slowly cooling direct fired vessels. Rupture discs and safety valves are addressed to safely relieve overpressure. Regular inspection and testing of welds is recommended to check for cracks. Specific gases like oxygen require special handling procedures due to reactivity. Unauthorized access to high pressure areas should be restricted and clearly marked.