Safety relief valve inspection

More formal inspections also verily the operation of safety and other controls such as low water and fuel cutoffs, level controls, fusible plugs, pressure gauges, water glasses, gage cocks, stop valves, safety/relief valves, and BD valves and lines. Also, FW pumps, flue and damper arrangements, combustion safeguards, name plate specifications, set pressures, boiler connections, floats, mercury switches, bellows, and other components may be inspected. 

Occasionally, there may be business pressures or maintenance scheduling problems that would encourage the delay of prooftesting of safety critical alarms and shutdown systems. Such situations can also delay of vessel inspections and safety relief valve testing. Some type of variance procedure or review policy should be defined to handle this occasional need. Such a policy ought to require the review of all of the inspection and test records on the specific equipment involved as well as an approval of the superintendent of the area. 

These written procedures can be general for inspections of a specific grouping such as storage tanks, centrifugal pumps, heat exchangers, or safety relief valves. It can be stand-alone documents or embedded in work orders, or a separate manual. It can even be the original equipment manufactmer s manuals for the given model [6]. 

When a seasoned engineer thinks of design standards for tanks, piping, safety relief valves, and a host of other equipment he thinks abont the American Petroleum Institute (API). Similarly API tank inspection and repair practices are considered the holy-grail. The API roots took hold in the beginning of World War I, when the domestic oil and natural gas industry worked together to assist the war effort. 

A specific inspection frequency shall be estabhshed for each safety relief valve. The inspection frequency will be a function of inspection history, relief system design, process conditions, operating experience, on-stream service capabilities, economics, and regulatory mandates. 

The pressurizer is a vertical, cylindrical vessel with semi-spherical upper and lower heads. The matrix material of the pressurizer is SA508-III low alloy carbon steel. The internal surface is clad with stainless steel, A spray line connection nozzle, a relief valve connection nozzle and two safety valve connection nozzles are provided in the upper head. An access port on the upper head is provided for inspecting the spray nozzle. The replaceable electric heating elements are located on the lower head. The surge line connection nozzle is located on the lower head. 

Sicherheitsiiberpriifung/ Sicherheitskontrolle safety check, safety inspection Sicherheitsvektor containment vector Sicherheitsventil security valve, security relief valve SicherheitsverhaltensmaBregeIn safety policy... 

Obviously, definition 2 would apply to a safety audit. The word audit implies a standard. The purpose of the audit is to find out if the standard is being met. This could be a standard for the number and location of fire extinguishers, whether operators have met certain training requirements, whether the relief valves on pressure vessels have been tested in the time period required, or virtually anything else that management deems essential to safety. Audits can involve any or aU of the following physical inspections, interviews, and review of documents and records. 

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