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Subcommittee on Corrosion & Materials

My Committees
My Rosters

 API Contact

Nate Wall
Senior Associate, Standards
American Petroleum Institute
1220 L Street, NW
Washington, DC 20005-4070
Phone: 202-682-8157

 Subcommittee Scope

Welcome to the home page of the API Subcommittee on Corrosion & Materials (SCCM).  The SCCM conducts research and develops and revises industry standards that address issues related to refining process equipment.   Issues of particular interest to the SCCM include: fabrication requirements, corrosion mechanisms, equipment reliability, refractory systems, and reducing capital and maintenance costs, while increasing safety, equipment lifespan and reliability.  Each meeting of the Subcommittee and its task groups provides a forum for an information exchange on problems and opportunities where industry experts share experiences from operations around the world.

This site houses the SCCM working documents, meeting agendas and presentations, and other relevant material.

Please Note: Minutes and other member working documents are located on a SCCM secure page entitled "SCCM Committee Docs" and require the user to log in from this home page. For those members who do not have access, please contact the API staff person listed below.

The SCCM work program of documents includes:

  • RP 571 - Damage Mechanisms Affecting Fixed Equipment in the Refining Industry
  • RP 582 - Welding Guidelines for the Chemical, Oil, and Gas Industries
  • TR 932-A - The Study of Corrosion in Hydroprocess Reactor Effluent Air Cooler Systems
  • Publ. 932-B - Design, Materials, Fabrication, Operation, and Inspection Guidelines for Corrosion Control in Hydroprocessing Reactor Effluent Air Cooler (REAC) Systems
  • RP 934-A - Materials & Fabrication of 2-1/4Cr-1Mo, 2-1/4Cr-1Mo-1/4V, 3Cr-1Mo, and 3Cr-1Mo-1/4V Steel Heavy Wall Pressure Vessels for High-Temperature, High-Pressure Hydrogen Service
  • TR 934-B - Fabrication Considerations for Vanadium-Modified Cr-Mo Steel Heavy Wall Pressure Vessels
  • RP 934-C - Materials & Fabrication of 1-1/4Cr-1/2Mo Steel Heavy Wall Pressure Vessels for High-Pressure Hydrogen Service Operating at or Below 825 deg. F (441 deg. C)
  • TR 934-D - Technical Report on the Materials and Fabrication Issues of 1-1/4Cr-1/2Mo Steel Pressure Vessels
  • RP 934-E - Materials & Fabrication of 1-1/4Cr-1/2Mo Steel Pressure Vessels for Service Above 825 deg. F (441 deg. C)
  • RP 934-F -  Minimum Pressurization Temperatures, MPT, for Heavy Wall Pressure Vessels (New document)
  • RP 934-G - Coke Drums (New document)
  • RP 934-H - Cr-Mo Reactor Maintenance (New document)
  • RP 934-I - Cr-Mo Inspection (New document)
  • TR 934-J - Coke Drum Repair (New document)
  • Publ. 935 - Thermal Conductivity Measurement Study of Refractory Castables
  • Publ. 938-A - An Experimental Study of Causes and Repair of Cracking of 1-1/4Cr-1/2Mo Steel Equipment
  • Publ. 938-B - Use of 9Cr-1Mo-V (Grade 91) Steel in the Oil Refining Industry
  • TR 938-C - Use of Duplex Stainless Steels in the Oil Refining Industry
  • TR 939-A - Research Report on Characterization and Monitoring of Cracking in Wet H2S Service
  • Publ. 939-B - Repair and Remediation Strategies for Equipment Operating in Wet H2S Service
  • RP 939-C - Guidelines for Avoiding Sulfidation (Sulfidic) Corrosion Failures in Oil Refineries
  • TR 939-D - Stress Corrosion Cracking of Carbon Steel in Fuel Grade  Ethanol - Review, Experience Survey, Field Monitoring, and Laboratory Testing
  • Bull. 939-E - Identification, Repair and Mitigation of Cracking of Steel Equipment in Fuel Ethanol Service
  • RP 941 - Steels for Hydrogen Service at Elevated Temperatures and Pressures in Petroleum Refineries and Petrochemical Plants
  • TR 941 - The Technical Basis Document for API RP 941
  • TR 942-A - Materials, Fabrication, and Repair Considerations for Hydrogen Reformer Furnace Outlet Pigtails and Manifolds (New document)
  • TR 942-BMaterial, Fabrication and Repair Considerations for Austenitic Alloys Subject to Embrittlement and Cracking in High Temperature Refinery Service (New document)
  • RP 945 - Avoiding Cracking in Amine Units
  • Publ. 950 - Survey of Construction Materials and Corrosion in Sour Water Strippers-1978
  • Publ. 959 - Characterization Study of Temper Embrittlement of Chromium-Molybdenum Steels
  • RP 970 - Work Process for Development of Corrosion Control Diagrams (New document)

Chair:  Peter Risse, Chevron Energy Technology Company
Vice-Chair: Vance McCray, ExxonMobil

Active members, thank you for attending the API 2017 Spring Refining Equipment Standards Meeting.

The SCCM meets next during the 2017 NACE Corrosion Technology Week, September 10-14, at the JW Marriott Indianapolis Downtown Hotel, Indianapolis, IN. See for details.



 SCCM Meeting Information

Folder: 2017 API CRE Spring Refining Equip Stds Mtg2017 API CRE Spring Refining Equip Stds

 SCCM Committee Documents

Folder: SCCM Document StatusSCCM Document
API Procedures for Standards Development-2016.pdfAPI Procedures for Standards


  Reference Documents
  Calendar of Events
  API Refining Meeting Information


 Ballot IDStatusResultsOpensClosesDescription
Committee ID : 678SCCM - Subcommittee on Corrosion & Materials
4215ClosedIn Progress07/31/201708/31/2017RP 934-A 2nd Recirc Ball: Material & Fab of Cr, Mo, V Steel Heavy Wall PV for Hi Temp Hi Pres H2
4220ClosedIn Progress08/04/201709/07/2017RP 934-C (Materials & Fabrication of 1-1/4Cr-1/2Mo Steel Heavy Wall Press Vessels), 2nd Ed. Reballot
4209ClosedIn Progress07/25/201709/08/2017RP 571, 3rd Ed., Damage Mechanisms for Fixed Equip.; Ballot to Approve First 25 Damage Mechanisms
4233ClosedIn Progress08/15/201709/29/2017RP 571, 3rd Ed., Damage Mechanisms for Fixed Equip.; Ballot to Approve Damage Mechanisms 26-50
4249ClosedResolution Required08/30/201710/09/2017API RP 574, CUI clarifications (574-038) Rev 0
4290ClosedIn Progress10/09/201711/13/2017RP 571, 3rd Ed., Part 3: Fixed Equip. Damage Mechanisms 51 to End of RP
4306OpenIn Progress11/28/201701/12/2018RP 939-C (Avoiding Sulfidation Corrosion Equipment Failures), 2nd Ed., 2nd Recirculation Ballot
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