Carbon dioxide diffuses through a high-density polyethylene (hdpe) sheet 50 mm thick at a rate of 2.2 × 10–8 (cm3 stp)/cm2-s at 325 k. the pressures of carbon dioxide at the two faces are 4000 kpa and 2500 kpa, which are maintained constant. assuming conditions of steady state, what is the permeability coefficient at 325 k? express your answer in engineering notation to two significant figures.

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One of the benefits of working with chlorinated polyvinyl chloride (CPVC) pipe is that it can be cut with a variety of different tools that don’t require any electricity or heat. However, different cutting methods are preferred over others, depending on the application.

When cutting CPVC pipe, it is important to make a square, flat cut. An uneven cut limits the bonding area and weakens the fitting.

To help you make the best possible cut, we’ve put together the following dos and don’ts when cutting CPVC pipe in different situations.