A book of this nature would not be possible without the cooperation of many individuals and companies within the welding industry. The authors gratefully acknowledge the valuable contributions made by the following: 3M Occupational Health and Envi- ronmental Safety Division ABB, Inc. ACRO Automation Systems, Inc. AGA Gas, Inc. Airco Welding Products, Div. of Airco, Inc. Airmatic/Beckett-Harcum American Iron and Steel Institute American Tool Companies, Inc. American Torch Tip Company American Welding Society Aquasol Corporation Arc Machines, Inc. Arcair Company, a division of Ther- madyne Industries, Inc. ASME Atlas Welding Accessories, Inc. Baldor Electric Co. Bay-Tech Industries, Inc. Beech & Associates Belchfi re Corp. Bernard Welding Equipment Co. Bessey Tools North America Bethlehem Steel Corporation BOC Brian Derby, EPIC Divers and Marine Broco, Inc. Bug-O Systems, Inc. BWE Ltd. Carol Cable Co. Caterpillar, Inc. CenterLine (Windsor) Limited Central Foundry, Division of General Motors Corporation Century Mfg. Co. Charles Albright, Ohio State University CK Worldwide, Inc. Clearing-Niagara CMS/Gilbreth Packaging Systems CMW, Inc. COB Industries, Inc. CONCOA Convergent Energy CPS Products, Inc. Cronatron, a Lawson Brand Dearman, a division of Cogsdill Tool Products, Inc. Dennis Nance CWI Consultants Co. De-Sta-Co. Dow Chemical Co. E.H. Wachs Company Electrode Dressers, Inc. Electron Microscopy Sciences Electrovert Emhart Teknologies ESAB Welding and Cutting Products Falstrom Co. FANUC Robotics North America, Inc. Fenway Machine Co., Inc. Fischer Engineering Co. Fusion, Inc. G.A.L. Gage Co. GE Inspection Technologies General Motors Corp. Goss Greg Cain of Oxylance, Inc. Gullco International Ltd. H&M Pipe Beveling Machine Co., Inc. 885 Handy & Harman/Lucas-Milhaupt, Inc. Harris Calorifi c Division of The Lincoln Electric Co. Hayes Fluid Controls Haynes Stellite Co. Hobart Brothers Co. Hobart Welders Hornell Speedglas, Inc. Hypertherm INCO Alloys International Ingersoll-Rand Waterjet Cutting Systems Inproheat Industries Ltd. and Inductotherm Group Canada Ltd. Instron® Intercon Enterprises, Inc. Jackson Products, Inc. Jet Equipment and Tools J.W. Rex Company J.W. Harris Co., Inc. Kamweld Technologies, Inc. Kayden Instruments, Inc. Kelsey-Hayes Co. Kemper Purifi cation Systems, Inc. Kolene Corporation Krautkramer, Inc. Laramy Products LLC Leica Optical Products Division Lenco–NLC, Inc. Linde Co. Div. Union Carbide Corp. LORS Machinery, Inc. Magnafl ux Magnatech LLC Maitlen & Benson Manufacturing Technology, Inc. McKinney Corporation Metallizing Co. of America, Inc. Michigan Seamless Tube Co. Miller Electric Mfg. Co.