Pressure Relieving Subcommittee

1
Pressure Relieving Subcommittee

• Chairman - Michael Porter
• Vice Chairman - Brad Otis

2
Subcommittee Charge

• Write and Maintain API Standards and Practices on
  Overpressure Protection
• API 520 Part I - Sizing and Selection
• API 520 Part II - Installation
• API 521 - Guide for PRV and Depressurizing
  Systems
• API 526/527 - Flanged Steel PRV/Seat Tightness
• API 2000 - Venting Atm and LP Storage Tanks

3
Subcommittee Charge

• Construct Responses to any Technical Inquiries
  pertaining to Standards and Practices from Users

4
Major Issues Subcommittee is Addressing

• Research on PSV/Inlet Piping Stability
• ASME Code Prohibits Standard Practice of Locking
  Open Block Valves within Protected Systems
• Joint Effort on RP 537 - Flare Details for
  General Refining and Petrochemical Services
• Task Forces are Working on Latest Revisions

5
Publication Schedule

• RP 520 Part I 1/2000 1/2005
• RP 520 Part II 12/94 4/2002
• RP 521 3/97 3/2002
• Standard 526 6/95 5/2001
• Standard 527 5/96 6/2002
• Standard 2000 4/98 4/2003