Proper installation of Corzan® piping systems is critical to the performance of the system. A few simple guidelines should be followed to ensure long service life and safe operation.
Proper care should be exercised when transporting, storing or installing Corzan piping to prevent damage.
- Corzan piping should be stored and shipped only with other non-metallic piping.
- It should not be dropped or dragged during handling, especially during extremely cold weather. The same treatment should apply to the handling of Corzan fittings.
- Prior to actual installation, the pipe and fittings should be thoroughly inspected for cracks, gouges or other signs of damage. Particular attention should be given to the inside surface of the part. While the outside surface may not exhibit damage, improper handling can result in damage that appears only on the inside surface.
Lengths of pipe can be easily and successfully cut by following a few simple guidelines.
- Best results are obtained by using fine-toothed saw blades (16 to 18 teeth per inch) with little or no offset (0.025 in. max.).
- Circular power saws (6,000 rpm) or band saws (3,600 ft./min.) are recommended using ordinary hand pressure.
- Miter boxes or other guide devices are strongly recommended for manual operation to ensure square cuts.
Burrs, chips, and dust should be removed following cutting to prevent contamination of the piping system and to facilitate joining.
Corzan piping can be installed using a number of joining techniques. Solvent welding, flanging, and threading are the more common methods and are covered in greater detail on their corresponding pages. Back welding of joints using hot gas (air) welding is also covered.
Hanging / Laying of Pipe
Corzan piping can be installed above ground or buried underground. Methods to minimize stress on the piping through proper installation are covered in detail below.
Any metal or non-metal piping system is subject to stress-induced corrosion. As a result, special attention should be given to minimizing stress throughout the system.
The total stress on a piping system includes not only the known pressure stress, but also stresses from sources such as expansion or installation. Expansion stresses can be minimized with expansion joints or loops. Attention to proper installation techniques also assists in minimizing stresses. Pipe and fittings should be properly prepared prior to joining.
Hangers and supports should be properly spaced to prevent sagging. In addition, hangers and supports should not have rough or sharp edges that could cut into the pipe. Over tightening of clamps and supports is also not recommended, as it will reduce system movement and contribute to system stress. Lastly, system components should not be forced into place.
Thermal Expansion and Contraction
Corzan piping has a low coefficient of thermal expansion among the family of thermoplastic piping materials. However, its thermal expansion is still greater than that of metal piping.
Typically, expansion loops or offsets in the piping are designed to account for any thermal expansion or contraction. Expansion joints can also be installed. Information on expansion joints can be obtained by contacting Lubrizol or Corzan piping manufacturers.
To account for expansion and contraction in design, check out our thermal expansion calculator.
Testing the Piping System
After the piping system is installed and any solvent cement is fully cured, the system should be pressure tested and checked for leaks using water. Using compressed air or inert gas for testing is not recommended.
All entrapped air should be allowed to vent as the system is filled with water. Water filling should occur at a velocity not more than 1 ft./sec.
After filling, the system should be pressured to 125% of the maximum design pressure of the lowest rated part of the system. Pressure should then be held for no more than one hour while the system is checked for leaks.