LHAP 302B Piping

Slide 1 Irrigation Piping ComponentsLHAP 302B Slide 2 Aluminum almost exclusively used for above ground installations often when removal of crops or ground disturbance is required nurseries, orchards, row crops etc. Advantages light weightgood strength and rigidityresistant to corrosionlow material costfully recyclable Slide 3 Aluminum sold in 20’ lengths Fittings mechanical - use a latch or band and latch with a rubber gasket in the female end or bolted flanges Slide 4 Aluminum wheel move system hand move system center pivot system Slide 5 Polyvinyl chloride (PVC) underground applications mainlines and lateral lines sold in 20 ft lengths pipe measured by outside diameter(IPS in Canada) Slide 6 PVC Advantages lightweight easy to install low friction loss variety of pressure ratings resistant to corrosion Disadvantages will fatigue due to continual pressure surges winter frost heaving will shatter the pipe Slide 7 PVC Attached using “Solvent Welding” primer to soften pipe, glue applied immediately after to seal joint Weld On pipe connection video Bell and Gasket Pipe connection each section has a bell end (section larger in diameter than rest of pipe) join to pipe end with spigot containing a rubber gasket stabilize with thrust blocks Slide 8 Polyethylene (PE) widely used in small irrigation systems (mostly residential/ light commercial) inexpensive comes in rolls Slide 9 PE Also used in greenhouse and micro irrigation system Advantages high amount of expansion and contraction much more forgiveness to ground movement Disadvantage only used for lower pressures 25 - 100 psi Slide 10 PE Fittings measured by inside diameter insert fittings and clamps threaded fittings compression fittings ¾” ins x ¾” ins x ½” ins tee 1” ins x ¾” MIPT coupling compression elbow Slide 11 High Density Polyethylene thicker version of PE used for high pressure systemsMainlines in larger municipal, industrial and commercial sites can withstand high and low pressurescan withstand accelerated soil movement measured in outside diameter (IPS) Slide 12 HDPE Connections fusion welding compression fittings resistant to corrosion and chemicals lightweight Slide 13 Pipe Strength measured SDR - Standard dimension ratio outside diameter 2” diameter pipe = SDR 20 wall thickness 0.1” wall thickness Schedule = wall thickness (Sch 40, Sch 80)mostly used for PVC fitting in irrigation rarely for pipe Slide 14 Pipe strength cont. Class/Series = maximum recommended operating pressure eg: Class 160, Class 200, Class 315mostly used for PVC (to account for surge pressure it is recommended to design to no more than 78% of the max operating pressure) SDR, Class, or Pressure will be stamped on the pipe Slide 15 Pipe InstallationLHAP 302B Slide 16 Pipe Installation Trenching cut a trench into the ground using a trenching machine Slide 17 Trenching Slide 18 Vibratory Plow pulls pipe through the ground using vibration Slide 19