ISO 29001 and API Q1 cover the same oil and gas quality requirements and are technically aligned. The practical difference is who issues them and who they target: ISO 29001 comes through ISO accreditation and applies across the petroleum supply chain, while API Q1 is issued by the American Petroleum Institute for manufacturers, with API Q2 for service suppliers. If you supply the energy sector, start with ISO 29001 certification.
What is ISO 29001?
ISO 29001 is the quality management standard for the petroleum, petrochemical, and natural gas industry. It takes ISO 9001 and adds sector-specific controls for defect prevention and supply-chain risk, which is why international oil companies expect it from their contractors.
What is API Q1 (and API Q2)?
API Q1 is the American Petroleum Institute's quality specification for organizations that manufacture products for the oil and gas industry. API Q2 is its counterpart for organizations that provide services. Both share the ISO 9001 foundation, with API adding its own requirements.
| Point | ISO 29001 | API Q1 |
|---|---|---|
| Issued by | ISO | American Petroleum Institute (API) |
| Built on | ISO 9001 | ISO 9001 plus an API appendix |
| Applies to | The whole petroleum supply chain | Manufacturers (Q1); service suppliers use Q2 |
| Recognition | International, via ISO accreditation | API monogram / registration |
Which one do Iraqi oil & gas vendors need?
It depends on the operator and the contract. ISO 29001 is broadly accepted across the sector and is the practical choice for most suppliers; some contracts specifically call for API. Always confirm the exact requirement in the tender or the operator's pre-qualification. IraqCert prepares your quality system and handles oil and gas vendor registration.