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About This Item


Full Description

Includes all addendums.

This standard is designed to provide the petroleum industry with tanks of adequate safety and reasonable economy for use in the storage of petroleum, petroleum products, and other liquid products commonly handled and stored by the various branches of the petroleum industry. It is intended to help purchasers and manufacturers in ordering, fabricating, and erecting tanks. Standard 650, Tenth Edition, covers material, design, fabrication, erection, and testing requirements for vertical, cylindrical, aboveground, closed- and open-top, welded steel storage tanks in various and capacities for internal pressures approximating atmospheric pressure, but a higher internal pressure is permitted when additional requirements are met. This standard applies only to tanks whose entire bottom is uniformly supported; and to tanks in nonrefrigerated service, that have a maximum operating temperature of 90 deg C (200 deg F).


Document History

  1. API Std 650

    Welded Tanks for Oil Storage, Twelfth Edition, Includes Errata 1 (2013), Errata 2 (2014), and Addendum 1 (2014), Addendum 2 (2016), and Addendum 3 (2018)

    • Most Recent
  2. API Std 650

    Welded Tanks for Oil Storage, 11th Edition, Includes Addendum 1 (2008), Addendum 2 (2009), Addendum 3 (2011), Errata (October 2011)

    • Historical Version
  3. API Std 650


    Welded Steel Tanks for Oil Storage, 10th Edition

    • Historical Version
  4. API Std 650

    Welded Tanks for Oil Storage, 5th Edition

    • Historical Version

Amendments, rulings, supplements, and errata

  1. API 650 Addendum 4


    Welded Steel Tanks for Oil Storage - Addendum 4 (Replacing Pages Only)

  2. API 650 Addendum 3


    Addendum 3 - Welded Steel Tanks for Oil Storage

  3. API 650 Addendum 2


    Addendum 2 - Welded Steel Tanks for Oil Storage

  4. API 650 Addendum 1


    Addendum 1 - Welded Steel Tanks for Oil Storage