WARNING
Failure to follow the safety precautions below may result in misapplication or improper installation and testing which can cause severe personal injury and/or property damage. NEVER use compressed air or gas in PVC/CPVC pipe and fittings. NEVER test PVC/CPVC pipe and fittings with compressed air or gas, or air-over-water boosters.w ONLY use PVC/CPVC pipe for water and approved chemicals.
1.Solvent Cement Welding
This method of joining is very simple and reliable if it is followed correctly, but any deviations from the recommended basic steps may reduce the strength and integrity of the joint. The procedures for preparation, insertion, and curing should be followed very carefully.
2.Trench Preparation
When laying PVC and CPVC pipe below the ground, care should be taken to remove all rocks, boards, empty primer and cement cans, brushes, bottles and other debris from the trench. Smaller diameters of pipe should be “snaked” in the trench to allow for expansion and contraction. If solvent cement welding is used for the method of joining, snaking, pressure testing, and pipe movement should not be done until after the joints have been given sufficient time to dry. Use of compressed air or gas in PVC/CPVC pipe
and fittings can result in explosive failures and cause severe injury or death.
3.Testing 3.1 NEVER use compressed air, gas or air-over-water boosters to pressure test PVC or CPVC piping systems. ONLY hydrostatic pressure testing is to be conducted on PVC and CPVC piping systems. Compressed air or gases can surge to high pressures and cause explosive failures that could seriously injure personnel. 3.2 Carefully follow all instructions for hydrostatic pressure testing. Failure to follow these instructions can result in a system failure. 3.3 Before water-testing a system, always bleed all entrapped air from system. Entrapped air is a major cause of surge and burst failure in plastic piping systems.
Handling & Storage 1 Valves need to be handled with care and refrain from dropping and throwing. Strong impact may affect its performance of Rigid PVC product. 2 A large nominal diameter pipe can be heavy, make sure for 2-man to unload and handle. 3 Store un-wrapped and stack up product orderly for long time storage.
Installation 1 Sufficient ventilation is needed for the installation under corrosive environment. 2 Do not install the products in place under extremely cold and humid. 3 In case the frost can happen, it is necessary to maintain the temperature above the freezing point to avoid it from freezing. 4 When disassembling and assembling are needed for maintenance purpose, follow the instruction that is enclosed in packaging.
Connecting Flanges 1 Maxflow approved (gasket) to seal is recommended to use. 2 Bolts needed to be snugged evenly and washers, spring washers must be used with both of bolts and nuts to maintain strength of flanges. 3 There should not be seen any gap between flanges when bolts are tightened. 4 Do NOT connect to any metal flanged pipe (including LP pipes). 5 Tighten bolts diagonally as shown below. 6 Recommended torque for bolts can be found in table. 1 (when EPDM packing is used). 7 Proper sizes of bolts are recommended to use as shown in table.2 for proper installation.
Shrinkage of pipe system
After installation, temperature change and liquid running through piping system can cause pipe shrinkage. This shrinkage can affect valves that piping system is connected to. Inlet and outlet of valves needs to be fixed.
Supporting
Supporting valve is necessary since valve is heavy. 1 Support valve ITSELF. 2 When valve is connected to metal piping system, avoid all weight from being on the valve. Consider points where weight should be supported at. 3 Use flange part to support valve by metal banding with screws. Utilize insert nuts located on the bottom of valve to fix the union diaphragm valve on the support. 4 Install two additional supports on both ends of valve within 2D (D stands for nominal valve size) distance from flanges. 5 Fix whole piping system when pipe lines nearby the pump is vibrating or vibration when fluid is running though pipe lines.
Insulation valves
Supporting valve is necessary since valve is heavy.
Fluid freezes up when operating temperature is under freezing point, if fluid does not move though pipe lines or stays still due to valve being closed. It is necessary to install glass wool or foamed urethane insulation to avoid pipe lines from freezing up. Refer to insulation handbook to consult for proper thickness of insulation.
WARNING
Failure to follow the safety precautions below may result in misapplication or improper installation and testing which can cause severe personal injury and/or property damage. NEVER use compressed air or gas in PVC/CPVC pipe and fittings. NEVER test PVC/CPVC pipe and fittings with compressed air or gas, or air-over-water boosters.w ONLY use PVC/CPVC pipe for water and approved chemicals.
1.Solvent Cement Welding
This method of joining is very simple and reliable if it is followed correctly, but any deviations from the recommended basic steps may reduce the strength and integrity of the joint. The procedures for preparation, insertion, and curing should be followed very carefully.
2.Trench Preparation
When laying PVC and CPVC pipe below the ground, care should be taken to remove all rocks, boards, empty primer and cement cans, brushes, bottles and other debris from the trench. Smaller diameters of pipe should be “snaked” in the trench to allow for expansion and contraction. If solvent cement welding is used for the method of joining, snaking, pressure testing, and pipe movement should not be done until after the joints have been given sufficient time to dry. Use of compressed air or gas in PVC/CPVC pipe and fittings can result in explosive failures and cause severe injury or death.
3.Testing
3.1 NEVER use compressed air, gas or air-over-water boosters to pressure test PVC or CPVC piping systems. ONLY hydrostatic pressure testing is to be conducted on PVC and CPVC piping systems. Compressed air or gases can surge to high pressures and cause explosive failures that could seriously injure personnel.
3.2 Carefully follow all instructions for hydrostatic pressure testing. Failure to follow these instructions can result in a system failure.
3.3 Before water-testing a system, always bleed all entrapped air from system. Entrapped air is a major cause of surge and burst failure in plastic piping systems.
Handling & Storage
1 Valves need to be handled with care and refrain from dropping and throwing. Strong impact may affect its performance of Rigid PVC product.
2 A large nominal diameter pipe can be heavy, make sure for 2-man to unload and handle.
3 Store un-wrapped and stack up product orderly for long time storage.
Installation
1 Sufficient ventilation is needed for the installation under corrosive environment.
2 Do not install the products in place under extremely cold and humid.
3 In case the frost can happen, it is necessary to maintain the temperature above the freezing point to avoid it from freezing.
4 When disassembling and assembling are needed for maintenance purpose, follow the instruction that is enclosed in packaging.
Connecting Flanges
1 Maxflow approved (gasket) to seal is recommended to use.
2 Bolts needed to be snugged evenly and washers, spring washers must be used with both of bolts and nuts to maintain strength of flanges.
3 There should not be seen any gap between flanges when bolts are tightened.
4 Do NOT connect to any metal flanged pipe (including LP pipes).
5 Tighten bolts diagonally as shown below.
6 Recommended torque for bolts can be found in table. 1 (when EPDM packing is used).
7 Proper sizes of bolts are recommended to use as shown in table.2 for proper installation.
Shrinkage of pipe system
After installation, temperature change and liquid running through piping system can cause pipe shrinkage. This shrinkage can affect valves that piping system is connected to. Inlet and outlet of valves needs to be fixed.
Supporting
Supporting valve is necessary since valve is heavy.
1 Support valve ITSELF.
2 When valve is connected to metal piping system, avoid all weight from being on the valve. Consider points where weight should be supported at.
3 Use flange part to support valve by metal banding with screws. Utilize insert nuts located on the bottom of valve to fix the union diaphragm valve on the support.
4 Install two additional supports on both ends of valve within 2D (D stands for nominal valve size) distance from flanges.
5 Fix whole piping system when pipe lines nearby the pump is vibrating or vibration when fluid is running though pipe lines.
Insulation valves
Supporting valve is necessary since valve is heavy.
Fluid freezes up when operating temperature is under freezing point, if fluid does not move though pipe lines or stays still due to valve being closed. It is necessary to install glass wool or foamed urethane insulation to avoid pipe lines from freezing up. Refer to insulation handbook to consult for proper thickness of insulation.