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Subcommittee on Aboveground Storage Tanks

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 API Contact

Jose Godoy
Associate, Standards
American Petroleum Institute
200 Massachusetts Avenue, NW
Washington, DC 20001
Phone: 202-682-8073

 Subcommittee Scope

Welcome to the API Subcommittee on Aboveground Storage Tanks (SCAST) web page. SCAST provides an important service to the refining, marketing, pipeline and petrochemical industry by developing recommended practices and construction, inspection and repair standards for aboveground storage tanks. In addition to the petroleum industry, API's tank standards are also used in the pulp and paper, utilities, food processing, fertilizer, and other process-related industries. SCAST's portfolio of standards includes:

  • Std 620 - Design and Construction of Large, Welded, Low-Pressure Storage Tanks
  • Std 625 - Tank Systems for Refrigerated Liquefied Gas Storage
  • Std 650 - Welded Tanks for Oil Storage
  • RP 651 - Cathodic Protection of Aboveground Storage Tanks
  • RP 652 - Lining of Aboveground Petroleum Storage Tank Bottoms
  • Std 653 - Tank Inspection, Repair, Alteration, and Reconstruction
  • Spec 12B - Specification for Bolted Tanks for Storage of Production Liquids
  • Spec 12D - Specification for Field Welded Tanks for Storage of Production Liquids
  • Spec 12F - Specification for Shop Welded Tanks for Storage of Production Liquids
  • Spec 12P - Specification for Fiberglass Reinforced Plastic Tanks
  • RP 12R1 - RP for Setting, Maintenance, Inspection, Operation, and Repair of Tanks in Production Service
  • Std 2015 - Requirements for Safe Entry and Cleaning of Petroleum Storage Tanks
  • RP 2016 - Guidelines and Procedures for Entering and Cleaning Petroleum Storage Tanks
  • Publ 2026 - Safe Access/Egress Involving Floating Roofs of Storage Tanks in Petroleum Service (SCAST document as of 2013)
  • RP 2027 - Ignition Hazards and Safe Work Practices for Abrasive Blasting in Petroleum Service (SCAST document as of 2013)
  • RP 2207 - Preparing Tank Bottoms for Hot Work (SCAST document as of 2013)
  • Std 2510 - Design and Construction of LPG Installations (SCAST document as of 2013)
  • Std 2610 - Design, Construction Operation, Maintenance, and Inspection of Terminal and Tank Facilities

These standards draw from a synergy of a high level of technical expertise and a long history of experience. The tank standards benefit owner/operators by providing the perspective and experience of other companies. Small companies gain expertise that would not be practically available otherwise. All companies benefit from proactively following industry standards developed using API's consensus process.

Chair: David Clark, Buckeye Partners L.P.
Todd McClellan, Colonial Pipeline Company

Thank you for attending the API 2019 Spring Refining and Equipment Standards Meeting. 

The next API Refining Meeting is the 2019 Fall Refining and Equipment Standards Meeting is planned for November 18 - 22, 2019 at the Hyatt Regency Atlanta in Atlanta, Georgia.

Click on “Calendar of Events" under Links for meeting logistics and other information.


 Meeting Information

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 Technical Interpretations

Folder: Answered Technical Inquiries - by StandardAnswered Technical Inquiries - by


  Reference Documents
  Calendar of Events
  API Refining Meeting Information


 Ballot IDStatusResultsOpensClosesDescription
Committee ID : 677SCAST - Subcommittee on Aboveground Storage Tanks
4879ClosedResolution Required08/02/201909/10/2019RP 652 Fifth Edition Lining of Aboveground Petroleum Storage Tank Bottoms
4887ClosedResolution Required08/13/201909/24/2019API RP 575 4th Edition 3rd Ballot
4902ClosedResolution Required09/03/201910/01/2019API 620-2032 Rev 0 PWHT for Openings
4903ClosedResolution Required09/03/201910/01/2019API 620-2044 - Clarify Figure 5-8 Panel w
4904ClosedResolution Required09/03/201910/01/2019API 620-2045 Rev 0 API 620 Annex Q 12th Ed A1A2 Q.5.3.2 proposal
4906ClosedResolution Required09/03/201910/01/2019API 620-2046 Rev 0 Incorporation of LLBW
4907ClosedResolution Required09/03/201910/01/2019API 625-2006 Agenda Item on Division of Responsibilities Revision 1
4908ClosedResolution Required09/03/201910/01/2019API 650-2018 Rev 4 Footnote Cleanup
4909ClosedResolution Required09/03/201910/01/2019API 650-2035 Added Welding on PWHT Assemblies_R3
4910ClosedResolution Required09/04/201910/03/2019API 650-2049 Lowest One Day Mean Ambient Temperature Rev.1
4911ClosedResolution Required09/04/201910/03/2019API 650-2050 Rev 0 incorporation of LLBW
4912ClosedResolution Required09/04/201910/03/2019API 653-2031 Bottom Corrosion Agenda Item Rev 4
4913ClosedResolution Required09/04/201910/03/2019API 653-2035 Authorization For Repair Work - Rev 5
4915ClosedResolution Required09/04/201910/03/2019API 653-2037 Deferral of Section 6.4 Inspection Rev 3
4894ClosedResolution Required08/20/201910/04/2019620-2042 Proposed New Annex Y, Membrane Component of Membrane Containment Tank Systems
4896OpenResolution Required08/21/201910/04/2019625-2005 R1: Membrane Tank Containment Systems
4920ClosedResolution Required09/05/201910/04/2019API 620-1018 Clarify Seismic Exception of L.1
4921ClosedResolution Required09/06/201910/04/2019API 620-2036 Rev 1 Appx R Q Pneumatic Test Tightness Exam. and Seq. Req
4916ClosedResolution Required09/04/201910/04/2019API 653-2040 Credit for Thick Film Unreinforced Linings Rev 1
4895ClosedResolution Required08/21/201910/04/2019API Ballot 620-2043 Annex Q R
4928ClosedResolution Required09/16/201910/18/2019API 625-1007 Secondary Container Short Time Rev C
4929ClosedResolution Required09/16/201910/18/2019API 650-1047 Frangibility of Anchored Tanks
4930ClosedResolution Required09/16/201910/18/2019API 650-1074 ASCE 7 Update rev 2019 08 06
4931ClosedResolution Required09/16/201910/18/2019API 650-1086 Lightning Protection Annex 2019 06 21
4932ClosedResolution Required09/16/201910/18/2019API 650-1087_Rev_0
4933ClosedResolution Required09/16/201910/18/2019Fall 2019 Tech Inquiries
4944ClosedResolution Required10/01/201911/05/2019API 12B 17th ed Ballot
Committee ID : 1874SCAST 12 Series (Production Liquids Tanks) WG
4938ClosedResolution Required09/24/201910/30/2019Annex to 12 Series Tanks Comments Only
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