What is ISO 15926? Oil & Gas Data Integration Standard

ISO 15926 is an international standard for the integration of data for oil and gas production facilities, including process plants, offshore platforms, and pipelines. It provides a common semantic framework — an ontology — for representing information about physical assets and their properties in a way that is system-independent and machine-readable.

The standard addresses one of the most persistent challenges in asset-intensive industries: engineering data created in one system (design, procurement, construction, operations) is rarely directly usable in another without expensive manual translation or mapping. ISO 15926 provides the shared language that makes reliable data exchange possible.

ISO 15926 parts: which matter for asset data management?

ISO 15926 is structured in multiple parts, of which the most relevant for asset data management are:

• Part 2: The data model — defines the fundamental ontological structure for representing things, their properties, and their relationships over time
• Part 4: Initial reference data library — the original catalogue of standardised classes and properties for equipment and materials (largely superseded by Part 8)
• Part 7: Implementation methods for the web of data and use of semantic web technology (RDF/OWL)
• Part 8: Recommended practices for implementing the reference data library — the most practically relevant part for current CFIHOS and data management implementations
• Part 9: Defines how to create templates for combining reference data into patterns suitable for information exchange

ISO 15926 reference data library: what it is and how it is used

The ISO 15926 reference data library (RDL) is a structured, hierarchical catalogue of classes, properties, and relationships used to describe equipment, materials, documents, and activities in plant facilities. It serves as the controlled vocabulary that different systems use to mean the same thing when exchanging data.

The RDL is hosted at posccaesar.org (POSC Caesar Association) and is publicly accessible. CFIHOS builds on the ISO 15926 RDL, mapping its equipment classes and technical attributes to ISO 15926 concepts.

ISO 15926 vs CFIHOS: which applies to your project?

• ISO 15926 is the foundational semantic standard — it defines the language and framework for describing assets and their data across the entire plant lifecycle and between any systems
• CFIHOS uses ISO 15926 as its semantic foundation but focuses specifically on defining what data must be delivered at project handover — making it the more immediately actionable standard for capital projects

In practice, ISO 15926 is more relevant for software vendors and platform architects; CFIHOS is more relevant for owner-operators and EPCs defining project data requirements.

DEXPI (Data Exchange in the Process Industry) is a related but narrower standard, focused specifically on the exchange of P&ID data — the process diagrams that describe how a plant is designed. Where ISO 15926 covers the full asset lifecycle, DEXPI covers one document type. In practice: if a project specifies ISO 15926 compliance, DEXPI may be used for P&ID exchange within that broader framework.

ISO 15926 and data interoperability: practical benefits

Implementing ISO 15926 alignment in asset data management delivers:

• Reliable data exchange between engineering tools (design, procurement, CMMS, ERP) without manual translation
• Consistent equipment classification and property definitions across all systems and all project phases
• Reduced cost of data migration when upgrading or replacing systems
• Foundation for digital twin and advanced analytics — which depend on semantically consistent, machine-readable asset data

According to a NIST study, inadequate interoperability costs the U.S. capital facilities industry an estimated $15.8 billion per year. ISO 15926 directly addresses this by providing a shared semantic framework that eliminates the need for costly point-to-point data translation.

How is ISO 15926 used on the Norwegian Continental Shelf?

ISO 15926 has been mandatory for data exchange on the Norwegian Continental Shelf (NCS) since February 2008, when the Norwegian Petroleum Directorate (NPD) required ISO 15926-based data in its Digital Data Repository (DDR). The Norwegian Oil Industry Association (OLF) formally adopted ISO 15926 as the technical basis for data exchange between operators and their supply chains. For projects on the NCS, ISO 15926 compliance is a contractual requirement embedded in owner-operator data requirements.

How to implement ISO 15926-aligned asset data management

Implementing ISO 15926 in practice means mapping your asset data to the ISO 15926 reference data library (RDL), using Part 4 data templates for equipment classes, and ensuring your engineering and operations systems can exchange data in ISO 15926-compliant formats.

Sharecat is built on ISO 15926 principles, enabling:

• Structured data handover aligned with ISO 15926 and CFIHOS requirements

• Automated validation of asset data against reference data library definitions

• Full traceability of asset data from project handover through operations

• Out-of-the-box integration with CMMS, ERP, and digital twin platforms

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Frequently asked questions about ISO 15926

Is ISO 15926 the same as CFIHOS?
No. ISO 15926 is a broader data integration standard; CFIHOS is a handover specification standard that uses ISO 15926 as its semantic foundation. See the comparison above.

Who uses ISO 15926?
Primarily software vendors, major owner-operators with sophisticated data management programmes, and EPCs working on large capital projects where system interoperability is a defined requirement. CFIHOS has made ISO 15926 alignment more practically accessible by defining specific, project-ready data requirements built on the ISO 15926 framework.

Is ISO 15926 mandatory for oil and gas projects?
It depends on jurisdiction and contract. On the Norwegian Continental Shelf, ISO 15926-based data exchange has been mandatory since 2008. In other regions, compliance is typically specified by the owner-operator in project data requirements. CFIHOS, which builds on ISO 15926, is increasingly required in project handover specifications globally.

How does ISO 15926 relate to digital twins?
ISO 15926 provides the semantic foundation that makes a digital twin reliable — a common language for assets, attributes, and relationships that allows engineering data to flow from design through construction and into operations without losing meaning. Without a standard like ISO 15926, digital twin data is typically siloed, inconsistently structured, and expensive to maintain.

Related concepts

• CFIHOS
• Data Interoperability
• Asset Information Management (AIM)
• Digital Twin
• Master Tag Register (MTR)