[PDF] High Frequency Pipe And Tube Welding eBook

Author : W Lucas
Publisher : Elsevier
Page : 161 pages
File Size : 14,59 MB
Release : 1991-05-31
Category : Technology & Engineering
ISBN : 1845698886

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The welding of tubes is an essential requirement in the fabrication of components in many industries. The original idea for this book came from a seminar organized by The Welding Institute which attracted over 100 specialists concerned with design, fabrication, production and quality assurance and yielded a number of valuable papers. "Process Pipe and Tube Welding" contains some of these papers together with additional chapters to provide comprehensive coverage of all aspects of tube welding from initial design considerations through production to final inspection. In the first three chapters the authors outline the process and equipment options available for both manual and mechanized welding. This is essential for design and production planning when faced with the choice of competing processes such as MMA, MIG, TIG or plasma, helping engineers make the right choice for particular applications and ensuring the most cost effective welding techniques are employed. Five further chapters are devoted to the application of tube welding in the aero-engine, ship building, power generation, petrochemical and chemical plant industries with numerous details on processes, materials, techniques and equipment. The welding parameters and production data provided by the authors are a valuable source of information and will help engineers to overcome problems in production.This title includes Process options and manual techniques for welding pipework fabrications; Mechanised arc welding process options for pipework fabrications; Process techniques and equipment for mechanised TIG welding of tubes; Welding pipes for aero-engines; TIG welding pipework for ships; Automatic tube welding in boiler fabrication; TIG and MIG welding developments for fabrication of plant for the chemical, petrochemical, and offshore oil and gas industries; Fabrication of aluminium process pipework; A fabrication system for site mechanical construction; Qualification of welding procedures for the chemical process industry; Non-destructive examination of welds in small diameter pipes.

Author : Hoobasar Rampaul
Publisher : Industrial Press Inc.
Page : 260 pages
File Size : 11,27 MB
Release : 2003
Category : Technology & Engineering
ISBN : 9780831131418

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A standard reference for decades, this new edition of Pipe Welding Procedures continues to reinforce the welder's understanding of procedures. Drawing on his extensive practical and teaching experience in the field, the author describes in detail the manipulating procedures used to weld pipe joints. You will find useful information on heat input and distribution, essentials of shielded metal-arc technology, distortion, pipe welding defects, welding safety, essentials of welding metallurgy, and qualification of the welding procedure and the welder. Look for new or expanded coverage of: Features Root Bead--Pulse Current--Gas Tungsten Arc Welding Shielded Metal Arc Welding--Electrode Welding Steel for Low Temperature (Cryogenic) Service Down Hill Welding--Heavywall and Large Diameter Welding Metallurgy Weld Repair

Author : HN. Udall
Publisher :
Page : 4 pages
File Size : 16,48 MB
Release : 1985
Category : Control
ISBN :

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A system for closed-loop temperature control of high-frequency welding systems has been sought for over 20 years; however, until recently the available instrumentation for temperature measurement was not capable of operating in the conditions prevailing on a typical tube or pipe mill. The major problems are: 1. A very small available target size. 2. The positional instability of the target due to changes in incoming material dimensions and mill parameters. 3. The presence of large quantities of cooling water in the immediate weld area with attendant smoke and steam. 4. The possibility of an occasional momentary arc occurring in the weld area under certain mill operating conditions. 5. The very small ratio of the heated material to the power available for heating, leading to the possibility of extremely rapid temperature changes. 6. The presence of a small but significant amount of radio frequency (RF) radiation in the immediate vicinity of the weld.