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Thanks moltenmetal, the main problem here reverts back to the client trying to get a high class job at cut price rates. It's a multinational (German based) company, one of the worlds largest, and they expect averything to be perfect and conforming to all relevant codes and specs. However, the...

Thanks again Uncle Syd I'll be OK now. The ideas you and the others have given me and my understanding of the new Health and Safety laws in SA (I started life after University, nearly 40 years ago, developing early quality, health and safety systems for the British Government) will enable me to...

Thanks Uncle Syd. I'm actually a Matallurgical Engineer and I appreciate very much your ideas for lowering the cost of welding. It's not really the cost of consumables but the time taken in setting up the purging. I'm working on an overhead grid type system to supply air pick up points to some...

Thanks everyone. Your answers are so consistant that the way to go is extreemly clear.

I have been asked to install a 50NB stainless steel pipeline to carry air at 7 bar. This is categorised as "Sound Engineering Practice" (here in South Africa) but what does this specifically mean? My client wants me to weld without purging to reduce costs. The pipe would not leak but I would...