buzzp is completely right. Your European facility appears to be recommending removing the last-resort measure in the list you quote.
Consider this: I wouldn't like to be the person who has to tell an accident investigator "Well, I decided to remove the warning label for sale in Europe...
Re: Stand pipes - That's just what we did on my first project commissioning sodium-hypochlorite installations. We didn't initially have stand-pipes, but we retrofitted them (and raised the tank slightly to ensure a flooded suction, and programmed daily duty rotation to stop gas bubbles building...
Sorry about the late reply, but:
Steer clear of auto-degassing heads if you're trying to control your dose rate with any accuracy. The way they work, they tend to bleed off a variable amount of the chemical along with the gas. In my experience, they're not very good at avoiding gas-lock of...
When using BSI online, search for BS 7671:2001 - that's the standard number for the latest version of the IEE wiring regs. However, I'm not sure whether BSI do a pdf version.
Instead you could try the online shop at www.iee.org, which sells a hyperlinked pdf version on CD-rom, bundled with...
Sorry about the late reply - I've just discovered the waste treatment forum.
I'm not familiar with some of the processes you mention, but there's certainly a solid product from anaerobic digestion which you have to dispose of.
In the UK, with our limited space for landfill, water companies...
We have a new site where the earth bonding connections were not coated with protective grease for a few months. As a result, there's a build up of verdigris on the copper cable ends, cable gland earthing rings, etc.
It's been suggested to me that the corrosion will have set in and the only way...
You're right - P&IDs can get very messy with all the bubbles and connection lines to depict the control system. It can also get very time consuming (and therefore costly) inputting and keeping all that information up to date.
The question to ask is what level of detail is useful. At our...
When we were going for ISO 9001, covering our software development methods, we used "TickIT".
However, this may not be what you were looking for as it's about quality systems for software specification, design, verification, validation and traceability. If you're looking for...
You're right. A star-delta (Y-delta) starter has two contactors, interlocked via their auxiliary contacts so that only one can be closed at any time, with a timer to switch from star to delta a fixed time after the motor has been started. You could make one from individual components.
Maybe...
I agree, writing your own PID control algorithm is usually the best solution, and not too difficult to do, as long as your controller (I don't know the MSC-51) gives you the tools (add, subtract, multiply, divide, timer and somewhere to store values from the previous calculation).
You'll need...
In his reply on transformer oil, jbartos linked a web site for a more environmentally friendly alternative to mineral-based transformer oil. Has anyone got any other good links to suppliers or directories of sustainable / environmentally friendly products and materials? In particular, any good...
