Standards & BodiesFull Glossary

API 598

API standard for valve testing and inspection - shell (body) pressure test, seat leakage test, and backseat test. Defines acceptance criteria for leakage rates during hydrostatic and pneumatic tests. Most industrial valves are tested to API 598.

What is API 598?

API standard for valve testing and inspection - shell (body) pressure test, seat leakage test, and backseat test. Defines acceptance criteria for leakage rates during hydrostatic and pneumatic tests

Vajra Industrial Solutions is an engineering-driven industrial valve manufacturer and supplier. Concepts such as api 598 inform how we select, manufacture, and document valves for industrial service.

Related Terms

ISO 5208SeatShell Test

Frequently Asked Questions

What does API 598 cover?

API standard for valve testing and inspection - shell (body) pressure test, seat leakage test, and backseat test. Defines acceptance criteria for leakage rates during hydrostatic and pneumatic tests. Most industrial valves are tested to API 598.

Which valves require compliance with API 598?

API 598 compliance is typically required for valves used in oil & gas, petrochemical, and industrial process applications where the standard applies. Procurement specifications for EPC projects and operating companies often mandate specific standards as part of the Material Requisition (MR). Vajra Industrial Solutions supplies valves with full certification documentation including API 598-compliant test certificates.

Does Vajra Industrial Solutions supply API 598-compliant valves?

Yes. Vajra Industrial Solutions supplies industrial valves with third-party inspection and full documentation packages including material test certificates (MTC/EN 10204 3.1), hydrostatic test reports to the applicable standard, and dimensional inspection records. Contact sales@vajravyuh.com with your datasheet and piping class for a detailed technical offer.

Reviewed by Engineering Applications Team, Vajra Industrial SolutionsDiscipline: Industrial Valve TerminologyLast reviewed: 20 June 2026

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