Oxygen Safety Audit
WHA's Oxygen Safety Audit method is specifically designed for oxygen delivery systems in industry. The method incorporates the same analytical approach as WHA's System-level OHFRA process, which is based upon ASTM G88 design principles, but also incorporates the oxygen piping guidelines provided in CGA G-4.4 and EIGA 13-02-E, which evaluate metals selection based on published Exemption Pressures and use conditions that comply with published CGA/EIGA velocity curves. However, it allows flexibility to evaluate material flammability based on other recognized techniques if process conditions are above exemption pressures and corresponding velocity curves.
Since not all hazards are identifiable by system schematics or piping and instrumentation diagrams (P&IDs), WHA recommends that the safety audit be performed on-site and include a system inspection where WHA engineers actually walk the pipeline and document findings. WHA works closely with process engineers and designers to obtain the necessary piping materials, conditions and procedures that are important to consider in the safety audit. Where needed, WHA has the capability to evaluate the burn-resistance of alloys at various thicknesses, geometry, and conditions (elevated temperature and flowing) by performing custom promoted burn testing. WHA also has the capability to analyze localized conditions in components (pressures and velocities) using computational fluid dynamics (CFD) software to help judge material compatibility and ignition risk. The overall work product generally includes a report documenting the findings and recommending solutions to reduce the severity of the system, lower the risk of ignition and fire, and protect personnel or equipment.