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About This Item

 

Full Description

Includes Addendum 1, July 2013 and Addendum 2, November 2014

This standard covers low pressure, aboveground, vertical, and cylindrical tank systems storing liquefied gases requiring refrigeration. This standard provides general requirements on responsibilities, selection of storage concept, performance criteria, accessories/appurtenances, quality assurance, insulation, and commissioning of tank systems.

This standard covers tank systems having a storage capacity of 800 cubic meters (5000 bbls) and larger. Stored product shall be liquids which are in a gaseous state at ambient temperature and pressure and require refrigeration to less than 5 °C (40 °F) to maintain a liquid phase. Tank systems with a minimum design temperature of -198 °C (-325 °F), a maximum design internal pressure of 50 kPa (7 psig), and a maximum design uniform external pressure of 1.75 kPa (0.25 psig) are covered.

The tank system configurations covered consist of a primary liquid and vapor containment constructed of metal, concrete, or a metal/concrete combination and, when required, a secondary liquid containment.

Metallic container materials, design, fabrication, inspection, examination, and testing are covered in API 620 Appendix Q or Appendix R. The applicable appendix of API 620 depends on the design metal temperature and the applicable temperature ranges given in these appendices.
 

Amendments, rulings, supplements, and errata

  1. API Std 625 Addendum 2

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    Addendum 2 to Tank Systems for Refrigerated Liquefied Gas Storage, First Edition

  2. API Std 625 Addendum 1

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    Addendum 1 to Tank Systems for Refrigerated Liquefied Gas Storage, First Edition