JOINTING PROCEDURE OF FLOWTEK CPVC PIPE & FITTINGS

  • Flowtek pipe must be cut square to obtain the proper insertion depth and to provide the maximum bonding area for solvent cementing. Flowtek pipe can easily be cut with a wheel-type plastic tubing cutter, ratchet-style cutter, fine-toothed hand saw (hack saw), or power saws.
  • Burrs, filings, shavings etc. caused by the cutting process must be removed from the outside and inside of the pipe. Shavings and other debris will prevent proper contact of the joining surfaces and can lead to joint failure. Chamfering tools are available for this purpose, however, pocket knives or files are also suitable. A slight bevel is required on the pipe end to help ease entry into the fitting socket, and to prevent solvent cement from being pushed ahead of the pipe during the assembly process.
  • Wipe dirt, debris, and moisture from the pipe end and fitting socket using a clean, dry rag. Moisture will slow the cure time and reduce joint strength. Inspect piping and components for damage or irregularities prior to assembly. Do not use components that appear irregular or that do not fit properly; contact the appropriate manufacturer of the product in question to determine usability. Check the dry fit of the pipe and fitting prior to assembly. The pipe should enter the fitting socket easily one-quarter to three-quarters of the way.
  • USE ONLY CPVC CEMENT that conforms to ASTM F493. The use of the wrong cement can result in failure. Apply a heavy, even coat of cement to the outside pipe end. Apply a medium coat to the fitting socket. A second application of cement should be applied to the pipe end if there was little or no interference when the dry fit was checked. Do not allow excess cement to puddle in the pipe or fitting.
  • Immediately insert the pipe into the fitting while rotating the pipe one-quarter turn to help distribute cement. Properly align the fitting for installation at this time. Pipe must bottom completely to the stop in the fitting. Hold the assembly for 10 to 15 seconds to ensure initial bonding. A continuous bead of cement should be evident around the pipe and fitting juncture. If the bead is not continuous, it may indicate that insufficient cement was applied. If insufficient cement is applied the fitting must be cut out, discarded and begun again. Cement in excess of the bead should be wiped off with a rag.
  • Assembled joints must be allowed to set and cure properly prior to testing the system. Set and cure times are a function of type of cement used, pipe size, temperature, humidity, and tightness of fit. Drying time is faster for drier environments, smaller sizes, higher temperatures and tighter fits. The assembly must be allowed to set without any stress on the joint for one to five minutes depending on the pipe size and temperature. Following the initial set period, the assembly can be handled carefully.

Normal Size Inch 1/2” 3/4” 1” 1-1/4” 1-1/2” 2”
mm 15 20 25 32 40 50
Approx.
Number
Of Joints
per Can
50 ml 35 23 15 14 10 07
118ml 82 55 34 33 23 17
237ml 164 110 68 66 46 34
473ml 328 220 136 132 92 68
946ml 656 440 272 264 184 136

Do's

  1. Install product according to Flowtek installation instructions and manual and recommended safe work practices should be followed.
  2. Keep pipe and fittings in original packing and store pipes in covered area, until needed.
  3. Use tools designed for use with plastic pipe and fittings..
  4. Cut-off minimum 25 mm beyond the edge of the crack in case any crack is discovered on the pipe.
    Pipe may be cut quickly and efficiently by several methods. Wheel-type plastic tubing cutters are preferred. Ratchet type cutters or fine tooth saws are another option. However, when using the ratchet cutter, be certain to score the exterior wall by rotating the cutter blade in a circular motion around the pipe. Do this before applying significant downward pressure to finalise the cut. This step leads to a square cut. In addition, make sure ratchet cutter blades are sharp. Cutting tubing as squarely as possible provides optimal bonding area within a joint.
  5. Burrs and filings can prevent proper contact between the tube and fittings during assembly, and should be removed from the outside and inside of the tube. A chamfering tool is preferred, but a pocket knife or file is also suitable for this purpose.
  6. Use CPVC Cement only. Use only CPVC Cement or an all purpose cement conforming to ASTM F-493 or joint failure may result.
  7. Always conduct hydraulic pressure testing after installation to detect any leaks and faults. Fill lines slowly and bleed air from the system prior to pressure testing.
  8. Rotate the pipe 90° to 180° to spread the CPVC Solvent Cement evenly in the joint while pushing the Pipe into Fitting.
  9. Always Use Teflon tapes with threaded fittings.
  10. Visually inspect all joints for proper cementing at the end of shift or day. A Visual inspection of the complete system is also recommended during pressure testing.
  11. Pressure test CPVC systems in accordance with local code requirements.
  12. When connecting to a gas water heater, CPVC tubing should not be located within 50cm of the flue. For water heaters lacking reliable temperature control, this distance may be increased up to 1m. A metal nipple or flexible appliance connector should be utilized. This measure eliminates the potential for damage to plastic piping that might result from excessive radiant heat from the flue.
  13. Use of a brass/CPVC transition adapter when connecting CPVC to a water heater will help facilitate water heater replacement in the future.

Don'ts

  1. Do not use Metal Hooks or Nails to support / hold or put pressure on the pipes. Do not use straps & hangers with Rough or sharp edges. Donot tighten the straps over the pipes.
  2. Do not drop heavy objects on pipes or walk on pipes.
  3. Do not dilute Solvent Cement with Thinners /MTO or any liquid etc.
  4. Do not use any other petroleum or solvent- based sealant, adhesive, lubricant or fire stop material on CPVC pipes and fittings.
  5. Never expose the pipe to Open Flame while trying to bend it.
  6. Do not use CPVC Pipes & Fittings for pneumatic applications
  7. Do not use air or gases for pressure testings.

 

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