Maximum anticipated surface pressure.
Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards
Source: API Bulletin 97, Well Construction Interface Document Guidelines, First Edition, December 2013. Global Standards
Source: OGP Report No. 476, Recommendations for enhancements to well control training, examination and certification, International Association of Oil & Gas Producers, October 2012. Global Standards