API 598 / ISO 5208 / EN 12266-1 Valve inspection and pressure testing
ChangingA new edition or revision is being prepared. Check before you specify.
- Edition
- API 598 11th ed., 2023; ISO 5208:2015; EN 12266-1 2012
- Publisher
- API
- Part family
- Valves
- Reviewed
- 23 October 2026 · source checked
Is API 598 / ISO 5208 / EN 12266-1 still current?
Yes, but a revision is coming. It is still in use, but a revision is in progress. The current reference is API 598 11th ed., 2023; ISO 5208:2015; EN 12266-1 2012 (MechAtlas review: 23 October 2026). Check the publisher before you specify it.
What it covers
Valve inspection and pressure testing
Equivalent and related standards
| Standard | Relationship | Note |
|---|---|---|
| SIM (leakage classes differ) | Related reference |
“Similar” never means interchangeable without an engineering check.
Parts that use API 598 / ISO 5208 / EN 12266-1
- Gate valve (USA (ASME / ASTM), related)
On-off valve with a wedge or disc that slides across the flow; used fully open or fully closed.
Valve pressure testing.
Official source
MechAtlas does not reproduce standards. Check the official edition at the publisher's page for API 598 / ISO 5208 / EN 12266-1 or the API store.
Open in MechAtlasCheck a drawing callout
Other valves standards
- API 526 / 527 / 520 / ISO 4126 Current
Relief valve dimensions, seat tightness, sizing - API 594 Current
Check valves: flanged, lug, wafer and butt-welding - API 598 Current
Valve inspection & testing - API 600 Current
Steel gate valves - API 602 / 608 / 609 Current
Compact gate, ball, butterfly valves - API 6D Current
Specification for valves (absorbed RP 6DR) - ASME B16.10 / EN 558 Current
Face-to-face dimensions - ASME B16.34 Current
Valves — flanged, threaded & welding end - AWWA C504 Current
Rubber-seated butterfly valves (water) - BS 1868 Current
Steel check valves, flanged and butt-welding, petroleum industry - EN 1171 Current
Cast iron gate valves - EN 16767 Current
Metallic check valves