Reference profile
- Designation
- API 677
- Title
- General-Purpose Gear Units for Petroleum, Chemical, and Gas Industry Services
- Issuing body
- API
- Current edition
- [verify]
- Status
- Library record: reviewed; official standard status [verify].
- Category
- Rotating Equipment
1
Overview
Requirements for general-purpose gear units for non-critical rotating machinery drives.
2
Scope & Applicability
Covers
- Gear rating
- Bearings
- Lubrication
- Testing
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.
3
Key Requirements
Lifecycle requirements
- GP gearbox specification
4
Technical Details
Requirements for general-purpose gear units for non-critical rotating machinery drives.
Components: Gear, Pinion, Bearing, Casing, Lube system.
Where to find it in the codeRefer to the official table of contents and the sections cited by the project specification; section numbering can vary by edition.
5
Engineering Notes
- General-purpose units suit spared or non-critical service; special-purpose gears use API 613.
6
Related Standards
7
Source, Edition & Status
- Publisher
- API
- Edition Year
- N/A
- Industries
- Refinery, Petrochemical, General Industry
- Content Status
- reviewed
- 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.