Advanced Photon Source

An Office of Science National User Facility

Experiment Hazard Class 5.3 High Pressure Vessels


This hazard classification applies to working with pressure vessels and systems. Other hazard classifications and associated controls may apply to experiments in this hazard class.

Experiment Category

Experiments involving previously reviewed hazard controls are categorized as medium risk experiments.

Experiments involving new equipment, processes or materials, or modified hazard control schemes are categorized as high risk experiments.

Hazard Control Plan Verification Statements

Engineered Controls – The establishment of applicable controls in accordance with the (American Society of Mechanical Engineers) ASME Boiler and Pressure Code, ASME B.31 Piping Code and applicable federal, state, and local codes. Verify vessel is stampled with ASME Code Symbol or allowable compressive stresses calculated using ASME Code Case 2286 July 17 1998. Verify that pressure relief devices have ASME "UV" certification or documentation of operability tests demonstrating function and flow capacity is availble. Pressure relief device should be inspected and tested under current NBIC. Piping/tubing should be compliant with operating temperature and pressure simultaneously.

Procedural Controls – Inspections and examinations of materials, in-process fabrications, nondestructive tests, and acceptance tests. Documentation of the history of the vessel must be kept. To be included in the documentation is design and operating parameters, testing requirements, repair history, and procedures. Argonne Pressure System Safety Manual may be used as a quidance when evaluating pressure system hazards.

Design Reviews and Equipment Inspections – Design drawings and calculations must be reviewed. Competent pressure system safety personnel must review pressure systems. Assistance may be obtained via the ANL Pressure Technology and Safety Committee (PTSC). The information needed for the safety review of the pressure equipment is contained in the APS Documentation Requirements for Pressurized Experiment Apparatus

Training – Equipment manufacturer's guidelines, PTSC recommendations, operating procedures

Signs and Labeling – Identification of capacity, use, and limits of vessels

Personal Protective Equipment – safety glasses with side shields (ANSI Z87.1), safety shoes, protective clothing

Monitoring – None

Hazard Control Verification

Unless otherwise noted in the approved experiment safety plan, the PSC Deputy Associate Laboratory Director of Operations delegates the authority to authorize an experiment in this hazard class to a member of the APS Experiment Review Board and any of the persons in the beamline personnel that appear in the list of Beamline Manager personnel authorized to approve experiments.

Experiment Authorization

The PSC Deputy Associate Laboratory Director of Operations delegates responsibility for verifying that required controls are in place to personnel delegated the authority to perform this task to the experiment On-site Spokesperson, and Beamline Management personnel having experiment safety responsibilities.


ANL LMS-PROC 313: Pressure System Safety 1/11/2017 (Internal link)

Please contact Bruce Glagola or Nena Moonier if you can not access the internal link

Reviewed:March 14, 2017