Reference profile
- Designation
- API 620
- Title
- Design and Construction of Large, Welded, Low-Pressure Storage Tanks
- Issuing body
- API
- Current edition
- [verify]
- Status
- Library record: published; official standard status [verify].
- Category
- Static Equipment
1
Overview
Design and construction of large welded low-pressure storage tanks operating above atmospheric but up to ~15 psig, including refrigerated service.
2
Scope & Applicability
Covers
- Low-pressure design
- Membrane theory
- Refrigerated tanks
- Compression ring
- Materials for low temperature
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
- LNG / LPG / cryogenic tank design
- Low-pressure tank specification
4
Technical Details
Design and construction of large welded low-pressure storage tanks operating above atmospheric but up to ~15 psig, including refrigerated service.
Components: Shell, Dome roof, Bottom, Compression ring.
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
- Used when internal pressure or cryogenic/refrigerated storage exceeds the scope of API 650.
6
Related Standards
7
Source, Edition & Status
- Publisher
- API
- Edition Year
- N/A
- Industries
- Oil & Gas, Petrochemical
- 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.