|Chapter 6151 Pressure and Vacuum Systems Safety Program|
The hazards associated with pressure and vacuum systems include leakage, rupture, explosion or implosion and can pose risks to personnel, property and the environment. The purpose of this program is to ensure that all personnel at Jefferson Lab involved in the construction, repair, alteration and operation of pressure and vacuum systems are cognizant of the hazards associated with these systems and construct, repair, alter and operate these systems in a safe manner. If at any time, questions arise as to the safety or proper procedures to be followed with pressure or vacuum systems, stop the activity and solicit help from a qualified source.
Except as otherwise noted, all references to "pressure system(s)" shall be considered to include both pressure and vacuum systems.
In accordance with 10 CFR 851, "Worker Safety and Health Program", Jefferson Lab affirms pressure systems safety by establishing:
Table 1: Required Safety Training by Job Classification
This chapter and its supplement provide the specific requirements of the Pressure and Vacuum Systems Safety Program at Jefferson Lab. The scope of this chapter covers any new construction of a pressure system or operation, inspection, maintenance, repair, or alteration of an existing system.
A pressure system is defined as any combination of vessels, piping, instrumentation (e.g. gauges), and/or equipment (e.g. pumps or compressors) either containing a fluid under internal pressure or exposed to external fluid pressure. Note that vacuum systems are a subclass of pressure systems.
Examples of pressure systems used at Jefferson Lab include:
Jefferson Lab recognizes that the above definition is very broad and many systems fitting this definition are not inherently hazardous, while other systems pose hazards that are mitigated by other programs or codes (e.g. International Building Code or US Department of Transportation (USDOT) regulations). All pressure and vacuum systems, unless explicitly excluded below, shall meet the requirements given in this program. If required, the members of the Pressure Systems Committee can assist in the determination of whether a system is excepted. The system designer and owner of an excepted system shall assume responsibility for the safe construction and operation of that system.
The following systems are excepted from the requirements of this program:
Program Expectations and Process Steps (click to expand)
Jefferson Lab has developed safety policies and procedures in the Pressure and Vacuum Systems Safety Supplement that ensure all pressure systems are designed, fabricated, tested, inspected, maintained, repaired, and operated by trained and qualified personnel in accordance with applicable and sound engineering principles. All pressure and vacuum systems not specifically excepted in Section 2.1 above shall be subject to the requirements defined in the Pressure and Vacuum Systems Safety Supplement.
Jefferson Lab recognizes that pressure systems that were designed and fabricated prior to the effective date of the revision to this chapter (2/28/08) to incorporate 10CFR851 requirements were not required to meet the full rigor of consensus codes and, as such, were constructed using sound engineering principles, operational experience, and/or ASME pressure codes (intent or full compliance). Construction documentation for these pre-2008 pressure systems was at the discretion of the design team and availability of such documentation is on a case-by-case basis. In all cases, pre-2008 pressure systems not specifically excepted by this chapter shall be identified as a pressure system and shall be subject to the Pressure and Vacuum Systems Safety Supplement requirements for operation, maintenance, in-service inspection, repair and alteration. Jefferson Lab requires that all new pressure systems designed and fabricated after 2/28/08 conform to the applicable:
For new pressure systems and repair/alteration of existing pressure systems, where codes cannot be directly applied because of pressure range, vessel geometry, use of special material, etc., Jefferson Lab has implemented measures (defined in the Pressure and Vacuum Systems Safety Supplement) to provide equivalent protection and ensure a level of safety greater than or equal to the level of protection afforded by the ASME codes. Measures include:
Vacuum systems are pressure systems. The expectations and process steps required for vacuum systems are dependent on the type of vacuum system and associated hazard levels. Jefferson Lab defines types of vacuum systems (Category 0, 1, 2, or 3) and provides associated procedures in the Pressure and Vacuum Systems Safety Supplement.
The pressure systems of the normal physical plant, including unfired and fired pressure vessels such as HVAC equipment and boilers, are maintained under the supervision of the Facilities Management and Logistics Manager. No addition or modification of any such vessel or piping system is to be made without consulting with the manager.
Users/experimenters planning to incorporate pressure or vacuum systems in an experiment must also comply with ES&H Manual Chapter 3120 The CEBAF Experiment Review Process and its appendices or ES&H Manual Chapter 3130 FEL Experiment Safety Review Process and its appendices. Although all the provisions of the present chapter apply, users/experimenters must address them within the larger context of the experiment review process.
Note: Management authority may be delegated at the discretion of the responsible manager.
Responsibilities listed here are for functions as well as staff positions. For example, a Design Authority can also be the System Owner for a piece of equipment and can act as a Technician when working on that equipment.
Pressure System and Vacuum System Owner
Pressure System and Vacuum System Technician
Pressure Systems Committee
Chief Information Officer
This document is controlled as an on-line file. It may be printed but the print copy is not a controlled document. It is the user's responsibility to ensure that the document is the same revision as the current on line file. .