Reference
Transcript
Reference
412 Cylinder Force pressures, such as 22 PSI, the best choice is a Low Force machine. It is important to note that if the pipe sizes chosen results in a low gauge pressure (less than 100 PSI), the speed of the hydraulic jaws will be greatly reduced and a smaller fusion machine would be a better choice. A Low Force machine has a higher hydraulic jaw speed than a High Force machine. The graph shown does not include drag force. Drag force is the force required to move the pipe once clamped in the machine. In some circumstances drag can be high, such as a tie-in of two long lengths of pipe. 12” 315mm 10” 280mm 250mm 225mm 200mm 180mm 160mm 150mm Rolling 412 DynaMc 412 Auto 4” MACHINES 125mm 4” 100 PSI 60psi 100 PSI 1200 90psi 5,000 1500 PSI 2000 PSI TracStar 412 Auto 5” TracStar 412 PitBull 412 6” TracStar 412 DynaMc 412 HP DynaMc 412 EP PitBull 412 6” Rolling 412 8” 8” For example: The range of the pipe to be fused is 4” IPS DR 7 through 12” DIPS DR 7 at 75 PSI interfacial pressure. From this example the best choice would be one of the Medium Force machines. They have a reserve of force to overcome drag. TracStar 412 Auto 10” ISO 340mm TracStar 412 PitBull 412 12” DIPS Rolling 412 IPS TracStar 412 Auto This graph will aid in the selection of the correct fusion machine cylinder force option. First, select the range of pipe and DR to be fused in the machine (largest pipe – smallest DR and smallest pipe – highest DR). Second, select the type of pipe to be fused. The pipe type will determine the correct interfacial pressure to use. Your pipe manufacturer can help you with this number. Third, use the graph to determine which machine is best suited for the task. You can derive from the graph, that when using high interfacial pressures, the best choice is a High Force machine. When fusing at low interfacial Reference 100 PSI 1200 PSI 1500 PSI 10,000 2000 PSI 1200 PSI 15,000 1500 PSI reference 20,000 2000 PSI LOW FORCE MEDIUM FORCE HIGH FORCE 131