The purpose of the IOGP S-734 specification documents is to define a minimum common set of requirements for procurement of AC uninterruptible power supply UPS) systems and associated batteries for North American projects in accordance with PIP ELSAP04, Complete Revision September 2020, Technical Correction September 2021, Uninterruptable Power Supply (UPS) System Specification, for application in the petroleum and natural gas industries. The IOGP S-734 specification documents follow a common structure comprising a specification, also known as a technical requirements specification (TRS), a procurement data sheet (PDS), an information requirements specification (IRS) and a quality requirements specification (QRS). These four specification documents, together with the purchase order, define the overall technical specification for procurement.