By J. Hicks (Auth.)
A pragmatic 'how to do it' ebook written with the layout and welding interface in brain. It informs designers not just of what they need to find out about welding but in addition, and most significantly, units out the knowledge the clothier should still supply to the welding engineer or fabrication superintendent in order that the designer's goals may be completed, when it comes to engineering functionality, safeguard, reliability, fee and visual appeal
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Additional resources for A Guide to Designing Welds
If there is a need for atmospheric corrosion resistance the first step might be to look at so called weather resistant grades of steel. These have a small proportion of copper in them which causes the surface to develop a firmly attached form of rust which resists further corrosion. Such steel has been used in unclad building frames, bridges and electricity transmission towers. The appearance is not to everyone's taste as it has connotations of ordinary rust and associated lack of maintenance, but in suitably chosen sites and with appropriate architectural treatment it has been used successfully.
A conceptual design may be handed over to a detail designer to develop who may then pass it to the draughtsman who prepares the shop drawings so that there is no direct link between the original designer and the fabricator. At the other extreme, the draughtsman's office may open on to the shopfloor. In both cases it is important that clear instructions as to what is required are passed on and in so doing recorded for future use. The minimum information which should pass from designer to fabricator can be summarised as follows: 59 • Material description; • Type of welded joint; • Dimensions and tolerances; • Mechanical properties of welded j oint ( if not the same as the parent metal); • Weld quality standards; • Surface treatments and finishes.
A) b) c) 45 Examples of misalignment and distortion which could give rise to stress concentrations: a) Offset misalignment; b) Angular distortion; c) Ovality. 54 be catastrophic. Examples are to be found in BS 5500 and this standard has often been used for other products requiring established high levels of quality. 44. As a result, work has been going on for a number of years to derive methods by which weld defect acceptance levels can be set to match the design conditions; this is known as engineering critical assessment (EC A ).
A Guide to Designing Welds by J. Hicks (Auth.)