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Plasgears, Many thanks for prompt reply - but it may have set the cat amongst the pigeons!! Guess most of us dont worry about separation because routine mtce, losses, etc hide the problem. Cynwrig

A collegue has flagged a potential problem. We have a grease packed gearbox which will have a shelf live of over five years - if it is not req'd as a spare! Does anyone know of an instance where the components of the grease have separated into oil plus the rest?

Speaking from experience in Europe, we found it more efficient and cost effective to use Al foil to wrap the pipe - 50% overlap,only primer paint applied. After that you need to make sure that your contractors have all Al or S/S final wrap joints on the underside.Keep a constant eye on the...

Have stored conc H2SO4 in CS tanks for 25 years - no problem except when we had Silica gel absorbers in the original vents!! They HAVE to be maintained on a rigorous schedule otherwise they block the vent. We went to polypropylene vent piping and no Silica gel -no problems! Still inspect the...

First question is always " How long is this line required - 1,10, 20 years? You can get away with rubber hose if it is for short term, irregular use! Why not ask your Hypo supplier - they handle this chemical every day and deliver to a wide variety of users. But do tell them the average AND...

Long time ago switched from Hypo dosing to Chlorine dosing, finally to an organic chloride as biocide. The latter worked as well as the others and was easier to control. I remember that Betz were the suppliers - not an advert!!. What cycles of conc are you operating at and what is the corrosion...

Why do you need to keep out CO2? As has been ststed, normal demin storage does not have elaborate purges, etc. I once saw a water tank go sherical when someone tirned up an air flow without first checking the relief capacity!!!!

Support the advocates of buying a "Freon " detector. Advice based on 30+ years on a site which produced and stoed liquid HCN - hence the leaning to a sound detection system. Soap has its uses but is best reserved for tyres!! "Penny wise - pound foolish" as we say!