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 Subcommittee Scope


Welcome to the home page of the API Subcommittee on Pressure-Relieving Systems (SCPRS).  The SCPRS develops standards and recommended practices covering the sizing, selection, and installation of pressure-relief devices used to protect unfired pressure vessels in the refining and petrochemical industries.  The SCPRS also establishes venting requirements for aboveground and underground liquid petroleum storage tanks.  Each meeting of the committee provides a forum for an information exchange on problems and opportunities where industry experts share experiences from operations around the world.

The SCPRS work program of documents includes:

  • Std 520 - Sizing, Selection, and Installation of Pressure-Relieving Devices 
    Part I - Sizing and Selection
    Part II - Installation
  • Std 521 - Pressure-Relieving and Depressuring Systems
  • Std 526 - Flanged Steel Pressure Relief Valves
  • Std 527 - Seat Tightness of Pressure Relief Valves
  • Std 2000 - Venting Atmospheric and Low-Pressure Storage Tanks (Nonrefrigerated and Refrigerated)  


SCPRS Chair:   Matt Brewer, BP
SCPRS Vice-Chair:   Eli Vatland Johansen, Equinor
API 520 Task Force Chair: Phil Henry, Equity Engineering
API 521 Task Force Chair: David Fenton, Exxon Mobile ​​
API 526-527 Task Force Chair: Thakor Patel
API 2000 Taskforce Co-Chairs: Kevin Campbell , Shell and Don Griglack,Phillips 66

 

 

 Open Ballots

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Ballot Information
  
ID5423
NameAPI 521 8th Ed Ballot 1 - Reballot of 7th Edition Unit Knockout Drum Ballot 6.9
Start Date03/05/2021
Closing Date04/26/2021
AssociateJose Godoy
CoordinatorJose Godoy
ProposalProposed Modification to API 521 6th Ed Section 5.7.9.5 Sizing (section 5.7.8.5 in current 7th Edition draft) 3rd from last paragraph
StatusClosed
ResultsIn Progress

Ballot Summary
StatisticsOutcomeNote
Affirmative27 
Negative3 
Abstain1 
Did Not Vote22 
Total Responses31 
Total Ballots53 
Response Rate58.49%Must be > 50%
Approval Rate90.00%Must be >= 66.67%
ConsensusYES 
 
 
  
  
  
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