Reference profile
- Designation
- API 526
- Title
- Flanged Steel Pressure-relief Valves
- Issuing body
- API
- Current edition
- [verify]
- Status
- Library record: published; official standard status [verify].
- Category
- Safety & Relief Devices
Overview
Specifies minimum requirements for direct spring-loaded pressure-relief valves and pilot-operated pressure-relief valves as follows: orifice designation and area, valve size and pressure rating, materials, and center-to-face dimensions.
Scope & Applicability
Covers
- Orifice Areas (D through T)
- Center-to-Face Dimensions
- Materials
- Pressure-Temperature Limits
Does NOT cover (exclusions)
- Exclusions are not documented in this library record. Confirm the official publication, neighbouring codes, the adopted edition, and jurisdictional boundaries before application.
Key Requirements
Lifecycle requirements
- Specifying PRV Dimensions
- Standardizing Valve Sizes
- Procurement
Technical Details
Specifies minimum requirements for direct spring-loaded pressure-relief valves and pilot-operated pressure-relief valves as follows: orifice designation and area, valve size and pressure rating, materials, and center-to-face dimensions.
Components: Flanged Spring-Loaded PRV, Pilot-Operated PRV.
Engineering Notes
- Provides standardized letter orifices (D through T) and physical dimensions for interchangeability.
Related Standards
- API 520
Companion or referenced standard; verify its exact relationship in the adopted edition.
- API 527
Companion or referenced standard; verify its exact relationship in the adopted edition.
Source, Edition & Status
- Publisher
- API
- Edition Year
- N/A
- Industries
- Petrochemical, Refinery, Chemical, Oil & Gas
- Content Status
- published
- Last Reviewed
- 2026-07-01
- Last Updated
- 2026-07-01
- Verified By
- Engineering Reviewer
- Official Link
- N/A
This paraphrased summary is a discovery aid. Do not reproduce or substitute it for the copyrighted official publication or jurisdictional requirements.