For a steel alloy it has been determined that a carburizing heat treatment of 20 h duration at 827°C will raise the carbon concentration to 0.42 wt% at a point 3.9 mm from the surface. Estimate the time necessary to achieve the same concentration at a 7.2 mm position for an identical steel and at a carburizing temperature of 1040°C. Assume that D0 is 4.5 × 10-4 m2/s and Qd is 105 kJ/mol.

answer:

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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.

answer:

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