Saturday, September 13, 2008
critical exposure temperature: is the lowest temperature of an equipment that it can be exposed before it starts to suffer from low temperature embrittlement. it is usually dictated by MDMT and the lower it is, the better.
minimum design metal temperature: is the lowest design temperature of an equipment it can reach or go before it starts to suffer from low temperature embrittlement. it is usually a temperature limit that can be achieve by material designs and thus dependent on how good the designer is. lower it is, the better and this leads to lower CET.
maximum allowable working pressure: is the highest pressure setting an equipment are allowed to operate on without dangerous consequences and high risk of failing. it is higher than design pressure.
design pressure: is the highest operating pressure an equipment is allowed to operate on and is dictated by equipment design and metallurgy. it is higher than operating pressure.
operating pressure: is the normal working operating pressure an equipment is expected to handle during normal process operation. no safety issues concern.
design temperature: is the highest operating temperature an equipment is allowed to operate on and is dictated by equipment design and metallurgy. it is higher than operating temperature.
operating temperature: is the normal working operating temperature an equipment is expected to handle during normal process operation. no safety issues concern.
corrosion rating: it is the corrosion allowance rate allowed for that equipment. dictate by metallurgy, design thickness. ranges from 1.5mm to 4.5mm.
smoke on the water.
10:57 AM
