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Thanks guys, The shafts do rotate slowly, the paddles are FRP, andthe liquid is lake water. The shaft sections are held together by compression couplings. The end of the shaft assembly passes through a wall (with a seal) where it is driven by a gear and chain off a motor. What is the...

Howdy folks, I have a project at a municipal water filtration plant (I'm one of the public works engineers) - the flocculator facility makes use of submerged steel shafts (4-7/16" dia.). The water is slightly chlorinated, and comes from a reservoir/lake. I'm quite ignorant when it comes to...

UncleSyd - is the Shelia Shine a clear coat protective finish suitable for outdoor exposure? What's your experience with its longevity? Thanks!

Thanks McGuire - I read in another thread (338-65804, "pickling and passivating)that wire brushing/mecahnically abrading the SS surface can have a detrimental effect on corrosion resistance - if so, is that alleviated by subsequent electropolishing? Thanks again, John

Howdy folks - I'm hoping to get a basic understanding of the difference between electropolishing and pickling/passivating. I have a number of SS louvres (4' x 1'6", 316 SS) which are installed in a water tunnel portal building, and exposed to high humidity from slightly chlorinated water...

Hi ProjEng, I work for a medium sized utility department, and we are currently reviewing alternatives to liquid (pressurized) chlorine for our water treatment plant. We currently peak at about 90mgd. Our biggest concern with liquid chlorine is safety issues - functionally, it does a great...

Hi, I need to come up with some budget level unit costs for installing a 24-inch hdpe in a lake - depth would be up to about 60 feet, length would be on the order of 1,500 feet - anyone been through this sort of project? Thanks!

Hi - I'm hoping to get some input on the pros cons of hydrostatic dished head testing for steel pipelines. Thanks!

Thanks again, McGuire - what's the most appropriate method to sample and test for sulpher in SS?

Are there special considerations regarding pickling and passivation on parts 'in-place'? If the fixtures cannot be removed from the humid environment, are there additional measures required? Thanks!

Thank you - does the paste serve to bolster the surface layer of the SS by leaving some coating or material, or is it rather repairing the SS natural corrosion resistant surface? can you suggest a few paste products? Thanks again!

Hi - we operate a number of valve houses for a large water transmission pipe system. Upgrades at one valve house included fixtures (wall vents, louvers, doors, railings, electrical enclosures) constructed of 316 stainless steel. All of these fixtures are showing some degree of corrosion (some...