Cold Shot (CO2) Pipe Freezing Machine
Contents
1. FREEZING OPERATIONS CARBON DIOXIDE age FREEZE HEAD SIZE MATERIAL FREEZING TIME REQUIREMENT POSSIBLE PER 20 LBS 10KG CYLINDER PER FREEZE HEAD Steel 1 min 2 oz 60 g 1 8 10 12 mm a i Soe Copper 1 min 2 25 oz 65 g Steel 1 min 2 50z 75 1 4 15 mm an mk oe Copper 2 min 4 75 oz 135 g Steel 2 min 525 150 3 8 18 mm id m oz ea Copper 3 min f oz 200 g 4 2 22 mm Steel 3 min 8 oz 225 g Copper 5 min 11 75 oz 330 g 3 4 28 mm Steel 5 min 12 25 oz 350 g ame Copper 7 min 15 75 oz 450 g 4 35 m Steel T min 17 75 oz 500 g 20 ey Copper 10 min 23 oz 650 g 15 1 1 4 42 mm Steel 24 5 oz 700 g 5 Copper 31 75 oz 900 g Hrein Steel 16 min 37 oz 1050 g 10 mm Copper 24 min 51 oz 1450 g T If an emergency situation occurs while conducting this task or there is an equipment malfunction shut the equipment off immediately and unplug the power tool REPORT ANY HAZARDOUS SITUATION TO YOUR SUPERVISOR IMMEDIATELY K PEMBINA TRAILS SCHOOL DIVISION SAFE WORK PROCEDURE Cold Shot Pipe Freezing A Community of Learners Committed to Excellence U n it G N E RAL Page 5of 5 Mb Regulations 217 2006 Part 16 Machines Tools amp Robots Sections 16 1 16 18 WS amp H Act W210 Section 4 5 7 7 1 Operators Manual for the Super Freeze Pipe Freezing Unit2. required personal protective equipment and replace if required Ensure no slip trip hazards are present in workspaces and walkways Faulty equipment must not be used Immediately report suspect machinery Do not operate within two feet of open flames Work only in well ventilated areas If you have to work in a confined space you must use ventilation equipment Protective eye wear and rubber gloves must be work at all times while operating this equipment Only use CO2 cylinders equipped with a dip tube Do not connect a pressure reducer to the cylinder Keep the cylinder in an upright position and secure it to prevent it from falling over 10 Do not completely empty the cylinder 11 Use only the parts and accessories recommended by the manufacturer Do not substitute parts 12 Do not touch the freeze heads while frosted Touching the freeze heads while frosted can cause frostbite Wear gloves if handling during use 13 Before opening piping system test to confirm that the ice plugs are fully formed and stable Opening the system before a plug Is formed can cause burns electric shock or other serious injury or result in flooding or other property damage 14 Do not leave this equipment operating while unattended 15 Never hit a chilled freeze head with a hammer or other tool This will cause the heads to shatter 16 Do not over tighten the heads Gas must be allowed to escape Over tightening increases the chance of the heads shatterin
3. g 17 Do not use machine if it is damaged Immediately report any damages to your supervisor oe a a gt O CO N PEMBINA TRAILS SCHOOL DIVISION SAFE WORK PROCEDURE Cold Shot Pipe Freezing A Community of Learners Committed to Excellence U n it G N E R AL Page 3 of 5 OPERATION 1 Inspect and don all personal protective equipment safety glasses rubber gloves and safety footwear Remove all jewelry loose clothing and tie back hair 2 Transport the unit to the location where the work will be conducted 3 Place the CO2 cylinder so that freeze heads can reach desired points Set the unit up ona level stable surface 4 Determine the location for the freeze plug s a The location must allow access for at least one freeze head b If the system will be soldered brazed welded or other heat adding processes performed the freeze plug s must be located as far away from the repair as possible c Ice plugs must be more than one foot 0 3 m away from end caps elbows closed valves other ice plugs or similar obstructions Placing an ice plug closer can cause splitting of the pipe or tube d Do not place ice plugs closer than 5 feet 1 5 m from a circulating hot water main 5 Prepare the freeze plug locations Remove all insulation and coatings from the pipe down to bare metal If needed remove any corrosion with a wire brush 6 Remove the seal from the CO2 cylinder 7 Screw the connector with the T distributor
4. hei ae teas Paes Cold Shot Pipe Freezing PEMBINA TRAILS SCHOOL DIVISION Cm A Community of Learners Committed to Excellence SAFE WORK PROCEDURE Unit G ENERAL Page 1 of 5 LOCATION WRITTEN BY BY APPROVED BY DATE CREATED LAST REVISION Nema Te Morven esas mw Brent Vandenbosch PERSONAL PROTECTION EQUIPMENT PPE fam Safety glasses or face shield must be worn at all Long and loose hair must be tied back and covered Sway times in work areas ae Safety footwear must be worn at all times in Fa Close fitting protective clothing must be worn the work area EAR Remove strings hanging from pullovers sweaters Protective gloves are also required HAZARDS PRESENT ADDITIONAL REQUIREMENTS Y MSI injuries Equipment orientation v Cold surfaces frostbite Never leave machine operating while unattended v CO2 leaks frostbite asphyxiation CO2 displaces Hot work permit O2 etc Use tools only for their intended purpose Y Burns hot water Read and understand general safety procedures in the v Electrical shock user manual C PEMBINA TRAILS SCHOOL DIVISION SAFE WORK PROCEDURE Cold Shot Pipe Freezing A Community of Learners Committed to Excellence U n it G E N E RAL Page 2 of 5 Carrying Case Instruction Manual Rubber Gloves Safety Glasses Freeze Heads 1 8 2 T Distributor Injector w Locking Nut N Spiral Hose 2 Hex Head Wrench PRE OPERATIONAL SAFETY CHECKS Inspect
5. ime table this indicates that the liquid within the pipe is still flowing or is too warm 14 Test to insure there is a complete ice blockage before starting the repair Test by slightly opening a valve or loosening a fitting behind the desired blockage If the leakage stops after a short while the blockage is operational if not close the valve and continue the freezing process 15 Once the ice plug has been completely formed the pipe can be opened While work is in progress the flow of CO2 must be maintained A stand by cylinder is recommended 16 When the repair is complete and system is closed close the cylinder valve and wait until the pressure in the hose has returned to normal before removing them from the valve Once the ice has completely melted removed the injector at the end of the spiral hoses from the freeze head then remove the freeze head from the pipe Do not try to remove the freeze heads from the pipe until they are completely thawed This can result in frostbite to hands and damage to the hoses and freeze heads ESTIMATED FREEZING TIMES The freezing times and carbon dioxide requirements given in the table below are only to be regarded as general guidelines and are valid for a water temperature of approximately 68 F 20 C The freezing times and refrigerant con sumption values will therefore vary for other temperatures For freezing liquids in plastic pipes much longer freezing times are generally required NUMBER OF
6. onto the cylinder right hand thread clockwise 8 Screw the spiral hoses onto the T distributor Note if only one freeze head is needed use the locking nut to close half of the T distributor 9 Choose the freeze heads which correspond to the size of the pipe to be frozen Place the freeze heads onto the pipe and secure by tightening the knobs evenly using the hex head wrench provided to give a firm but not overly tight hold Warning over tightening can cause stress fractures of the freeze head and cause it to shatter 10 Push each injector into the bore of the freeze head until it is completely inserted and resting against the stop then turn clockwise one quarter turn to lock in place Warning freeze heads must be positioned at least 40 1M apart from each other a he Freeze head clamp CO2 injector 11 Turn off all pumps to stop the flow of liquid in the pipe Allow the water to cool to room temperature before freezing 12 Fully open the cylinder valve Dry ice will form inside the freeze heads with a temperature of 110 F 79 C and freeze the liquid within the pipe Note CO2 sputtering from the heads during operation is normal Cold Shot Pipe Freezing A Community of Learners Committed to Excellence U n it G E N E R AL Page 4 of 5 Qamma TRAILS SCHOOL DIVISION SAFE WORK PROCEDURE 13 If the freeze heads do not become cold and covered with ice and frost after a brief period in accordance with the t
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