The purpose of the IOGP S-754 specification documents is to define a minimum common set of requirements for the procurement of liquid-Immersed distribution, power and regulating transformers in accordance with IEEE Std C57.12.00, published January 2022, IEEE Standard for Liquid-Immersed Distribution, Power, and Regulating Transformers for application in the petroleum and natural gas industries. The IOGP S-754 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