MyCommittees > Standards > CRE > SCPRS

 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
  • TR 522- Pressure Relief System Calculations
  • 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:   Eli Vatland Johansen, Equinor
SCPRS Vice-Chair:   Jake Coleman, Chevron
API 520 Task Force Chair: Phil Henry, Equity Engineering
API 521 Task Force Chair: David Fenton, Exxon Mobil Co-Chair: Melissa Marashi, Chevron â€‹

TR 522 Task Force Co-Chairs: Tesia Dobrydnia, Chevron and Casey Houston, Chemitics​

API 526-527 Task Force Co-Chairs: Thakor Patel and Sean Croxford, Curtiss-Wright  

API 2000 Taskforce Co-Chairs: Kevin Campbell , Shell and Tim Weber, Chevron 

 

 â€‹

 Open Ballots

 Ballot IDStatusResultsOpensClosesDescription
Committee ID : 439480SCPRS Subcommittee
4890ClosedResolution Required08/16/201909/27/2019API Std 520 Part II 7th edition Ballot 2
4900ClosedResolution Required08/28/201910/01/2019API Std 527 5th Ed Seat Tightness first ballot markup
4948ClosedResolution Required10/02/201911/01/2019API Std 2000 ballot item 12 LNG Tanks
4947ClosedResolution Required10/02/201911/01/2019API Std 2000 ballot item 15 Line Clearing
4949ClosedResolution Required10/02/201911/01/2019API Std 2000 ballot item 16 wet insulation
5057ClosedPass02/21/202003/20/2020Ballot to reaffirm Std. 2000, Venting Atmospheric and Low-pressure Storage Tanks
5073ClosedIn Progress02/28/202004/10/2020API 520 Part II 7Th Edition
5076ClosedIn Progress03/03/202004/10/2020Ballot to Review API 520 Part 2 Section 13.9
5423ClosedIn Progress03/05/202104/26/2021API 521 8th Ed Ballot 1 - Reballot of 7th Edition Unit Knockout Drum Ballot 6.9
5603ClosedIn Progress09/21/202110/26/2021API 521 8th Ed Ballot 1 - 2nd Re-ballot of 7th Edition Unit Knockout Drum Ballot 6.9
5686ClosedIn Progress02/16/202204/02/2022API 521 8th Edition Ballot Item 2 Work Item 10 - Sweep Gas for Flare Network
5719ClosedIn Progress03/16/202204/27/2022Ballot for 526 e8
5718ClosedIn Progress03/16/202204/27/2022First Ballot for API 520 Part II
5723ClosedIn Progress03/18/202204/29/2022API 520 Part 1 Ballot
5726ClosedIn Progress03/22/202205/03/2022API 520 Part 1 Ballot- Pressure Relief Devices Designed for Liquid Service
5728ClosedIn Progress03/22/202205/03/2022API 520 Part 1- Table 1 and Table 2 Improvements
5754ClosedIn Progress03/30/202205/06/2022API 2000 Annex XX
5755ClosedIn Progress03/30/202205/06/2022API 2000 Work Item 4
5752ClosedIn Progress03/30/202205/06/2022API 521 8th Edition Ballot Item 3
5753ClosedIn Progress03/30/202205/06/2022Ballot for API 2000-Venting for Refrigerated aboveground and belowground tanks
5852ClosedResolution Required09/01/202210/13/2022Second Ballot for API 526
5860ClosedIn Progress09/12/202210/31/2022API 537, Flare Details, 3rd Edition, Addendum 2
5915ClosedIn Progress10/05/202211/02/2022Second Ballot for API 520 Part I Ballot- "Table 1 and Table 2 Improvements"
5920ClosedIn Progress10/06/202211/03/2022Ballot for API 2000 item 15
5921ClosedIn Progress10/06/202211/03/2022Ballot for API 2000 Work Item 16
5919ClosedIn Progress10/06/202211/03/2022Second Ballot for API 2000 Work Item 24
5935ClosedIn Progress10/24/202212/05/2022Ballot for API 520 Part I Spec Sheets
5938ClosedIn Progress10/25/202212/06/2022Ballot for 520 Pt1 Annex C
5954ClosedIn Progress11/14/202212/14/20222nd ballot for API 520 Part I Ballot- "should and shalls"
5955ClosedIn Progress11/14/202212/14/20222nd Ballot for API 520 Part II "Body Drain Plug"
5999ClosedResolution Required02/21/202304/17/2023API RP 576, Inspection of Pressure-Relieving Devices, 5th Ed, 2nd Ballot REDLINE ONLY
6049ClosedIn Progress04/11/202305/09/2023Ballot for API 520 part 1 Subcritical Kb Equation
6050ClosedIn Progress04/12/202305/10/2023Second ballot for API 520 Spec Sheets
6074ClosedIn Progress05/12/202306/23/2023Second Ballot for API 520 Part 1: Non-Equilibrium Flow
6087ClosedIn Progress06/16/202307/28/2023Resolution Ballot - 520 Pt 1 Spec Sheets
6113ClosedIn Progress07/20/202308/25/2023API 520 Part I
6129ClosedIn Progress08/18/202309/18/2023API RP 576 Inspection of Pressure-relieving Devices – Third Ballot Redline Only
6138OpenIn Progress08/24/202310/05/2023API 521 8th Edition Ballot Item 2 Sweep Gas for Flare Network (Work Item 10)
6137OpenIn Progress08/24/202310/05/2023API 521 8th Edition Ballot Item 4 Thermal Cracking (Work Item 3)
6139OpenIn Progress08/24/202310/05/2023API 521 8th Edition Ballot Item 6 Manual valves discharging to flare guidance Work Item 9
 
 
  
  
  
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