The following publications are currently being worked on within the API Committee on Refinery Equipment.
Documents marked with an asterisk (*) are expected to be published in 2013.
Recommended Practice 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1 and Zone 2, 2nd Edition
API 510, Pressure Vessel Inspection Code: Maintenance Inspection, Rating, Repair, and Alteration, 10th Edition
Standard, 520-Part 1, Sizing, Selection, and Installation of Pressure-Relieving Devices in Refineries—Part 1, Sizing and Selection, 9th Edition
* Standard 521, Guide for Pressure-relieving and Depressuring Systems, 6th Edition
* Standard 527, Seat Tightness of Pressure Relief Valves, 4th Edition
* Recommended Practice 535, Burners for Fired Heaters in General Refinery Services, 3rd Edition
Standard 537, Flare Details for General Refinery and Petrochemical Service, 3rd Edition
* Recommended Practice 538, Industrial Fired Boilers, 1st Edition
* Standard 541, Form-Wound Squirrel-Cage Induction Motors 500 Horsepower and Larger, 5th Edition
* Recommended Practice 551, Process Measurement Instrumentation, 2nd Edition
* Recommended Practice 552, Transmission Systems, 2nd Edition
* API 555, Process Analyzers, 3rd Edition
* Standard 560, Fired Heaters for General Refinery Services, 5th Edition
* Recommended Practice 573, Inspection of Fired Boilers and Heaters, 3rd Edition
* Recommended Practice 575, Inspection of Atmospheric & Low Pressure Storage Tanks, 3rd Edition
* Recommended Practice 577, Welding Processes, Inspection, and Metallurgy, 2nd Edition
Recommended Practice 583, Corrosion Under Insulation and Fireproofing, 1st Edition
Recommended Practice 584, Integrity Operating Windows, 1st Edition
Recommended Practice 585, Pressure Equipment Integrity Incident Investigation, 1st Edition
* Recommended Practice 591, Process Valve Qualification Procedure, 5th Edition
* Standard 599, Metal Plug Valves — Flanged, Threaded and Welding Ends, 7th Edition
* Standard 603, Corrosion-Resistant, Bolted Bonnet Gate Valves--Flanged and Butt-Welding Ends, 8th Edition
Standard 612, Petroleum, Petrochemical and Natural Gas Industries—Steam Turbines—Special-Purpose Applications, 7th Edition
* Standard 617, Axial and Centrifugal Compressors and Expander-compressors for Petroleum, Chemical and Gas Industry Services, 8th Edition
Standard 618, Reciprocating Compressors for Petroleum, Chemical and Gas Industry Services, 6th Edition
* Standard 620, Design and Construction of Large, Welded, Low-Pressure Storage Tanks, 12th Edition
* Standard 623, Steel Globe Valves—Flanged and Butt-welding Ends, Bolted Bonnets, 1st Edition
* Standard 624, Type Testing of Rising Stem Valves Equipped with Flexible Graphite Packing for Fugitive Emissions, 1st Edition
Standard 625-A1, Tank Systems for Refrigerated Liquefied Gas Storage—Addendum 1, 1st Edition
* Standard 650, Welded Tanks for Oil Storage, 12th Edition
* Standard 653-A1, Addendum 1 to Tank Inspection, Repair, Alteration, and Reconstruction, 4th Edition
* Standard 661, Air-Cooled Heat Exchangers for General Refinery Service, 7th Edition
* Standard 663, Multiple Hairpin Heat Exchangers, 1st Edition
* Standard 664, Spiral Plate Heat Exchangers, 1st Edition
* Standard 670, Machinery Protection Systems, 5th Edition
* Standard 673, Centrifugal Fans for Petroleum, Chemical and Gas Industry Services, 3rd Edition
* Standard 682, Pumps—Shaft Sealing Systems for Centrifugal and Rotary Pumps, 4th Edition
* Recommended Practice 684, Tutorial on the API Standard Paragraphs Covering Rotor Dynamics and Balance (An Introduction to Lateral Critical and Train Torsional Analysis and Rotor Balancing), 3rd Edition
Recommended Practice 687, Rotor Repair, 2nd Edition
Recommended Practice 691, Machinery Risk Based Inspection, 1st Edition
Standard 692, Compressor Dry Gas Seals, 1st Edition
* Technical Report, 939-D - A1, Addendum 1 to Stress Corrosion Cracking of Carbon Steel in Fuel Grade Ethanol -- Review, Experience Survey, Field Monitoring, and Laboratory Testing, 2nd Edition
Standard 2000, Venting Atmospheric and Low-pressure Storage Tanks, 7th Edition
Standard 2510, Design and Construction of LPG Installations, 9th Edition
For Further Information Contact: Steve Crimaudo, Standards Department, email: (
crimaudos@api.org).