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API RP 576 Inspection of Pressure-relieving Devices, Fourth Edition
standard by American Petroleum Institute, 04/01/2017
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API RECOMMENDED PRACTICE 576 FOURTH EDITION, APRIL 2017
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Inspection of Pressure-relieving Devices
This recommended practice (RP) describes the inspection and repair practices for self-actuated pressure-relieving devices commonly used in the oil/gas and petrochemical industries. As a guide to the inspection and repair of these devices in the user’s plant, it is intended to ensure their proper performance. This publication covers self-actuated devices such as direct-acting spring-loaded valves, pilot-operated pressure-relief valves, rupture disks, pin-actuated devices, and weight-loaded pressure vacuum vents.
The recommendations in this publication are not intended to supersede requirements established by regulatory bodies. This publication excludes tank weak seams and/or sections or tank thief hatches, explosion doors, fusible plugs, control valves, pressure-regulating devices, integral rotating equipment components, other devices that either depend on an external source of power for operation or are manually operated, or devices not designed to be inspected or recertified. Inspections and tests made at manufacturers’ plants, which are usually covered by codes or purchase specifications, are not covered by this publication.
This publication does not cover training requirements for personnel involved in the inspection and repair of pressure-relieving devices. Those seeking these requirements should see API 510 and API 570, which give the requirements for a quality control system and specify that the repair organization maintain and document a training program ensuring that personnel are qualified.
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration API Standard 520 (all parts), Sizing, Selection, and Installation of Pressure-relieving Devices API Standard 521, Pressure-relieving and Depressuring Systems
API Standard 526, Flanged Steel Pressure-relief Valves
API Standard 527, Seat Tightness of Pressure Relief Valves
API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems
API Recommended Practice 580, Risk-Based Inspection
API Standard 620, Design and Construction of Large, Welded, Low-pressure Storage Tanks
API Standard 2000, Venting Atmospheric and Low-pressure Storage Tanks
ASME Boiler and Pressure Vessel Code (BPVC) 1, Section VIII: Rules for Construction of Pressure Vessels; Division 1: Pressure Vessels
ASME PTC 25, Pressure Relief Devices
NB-18 2, Pressure Relief Device Certification
1 ASME International, 2 Park Avenue, New York, New York 10016-5990.
2 The National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus, Ohio 43229, www.nationalboard.org.
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