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Extra info for API RP 520 Sizing, Selection, and Installation of Pressure-Relieving Devices in Refineries-Part II—Installation

Sample text

Moreover, API does not act as a consultant on speciÞc engineering problems or in the general understanding or application of the standard. If it is the opinion of the committee, based on inquiry information submitted, that the inquirer should seek other assistance, the inquiry will be returned with the recommendation that such assistance be obtained. All inquiries that do not provide the information needed for the committeeÕs full understanding will be returned. 4 After the background section, an inquiryÕs main section shall state the inquiry as a condensed, precise question, omitting superßuous background information and, where appropriate, posing the question so that the reply could take the form of ÒyesÓ or ÒnoÓ (perhaps with provisos).

The burst disk may have sharp edges. 4. The disk and holders may still have toxic or hazardous process mediaÑuse care during handling and disposal. Parts of some disk types may extend into the discharge piping after rupture. 1 General 9. Where electrical sensors are Þtted to the pin-actuated pressure-relief device, ensure that the appropriate electrical design standards for the application are met. 10. Ensure that the installation is capable of containing recoil forces when the pin-actuated pressure-relief device operates.

Pressure-relief valves should, when possible, be stored indoors on pallets away from dirt and other forms of contamination. Pressure-relief devices should be handled carefully and should not be subjected to shocks, which can result in considerable internal damage or misalignment. For valves, seat tightness may be adversely affected. Rupture disks should be stored in the original shipping container. 3 INSPECTION AND TESTING OF PRESSURERELIEF VALVES The condition of all pressure-relief valves should be visually inspected before installation.

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API RP 520 Sizing, Selection, and Installation of Pressure-Relieving Devices in Refineries-Part II—Installation by American Petroleum Institute


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