

McElroy > Fusion Pressure > Calculate 
  

Fusion Pressure Calculator
Use McElroy's fusion pressure calculator to quickly find the right fusion pressure for your job. To properly fuse pipe the fusion pressure must be adjusted so the pipe manufacturers recommended interfacial pressure is achieved.
We have several convenient ways to calculate fusion pressure. You can use our online tool below, download the Fusion Pressure Calculator App for your Mobile Device, or order a calculator.
Wondering how it all works? You can also learn how to calculate fusion pressure.

Also Available:
For your mobile device:
Now you can have a fusion pressure calculator with you no matter where you are.
Sliding Fusion Pressure Calculator
Click here to order a fusion pressure calculator. Convenient for on the job, or in the office.



Learn to Calculate Fusion Pressure

EXAMPLE 1:
Using a No.28 Machine from Chart A (at right) we will determine our gauge pressure.
Pipe Size = 8" IPS
OD of Pipe = 8.625
DR of Pipe = 11
IFP = 75 PSI
Measured Drag = 30 PSI 
VARIABLE DEFINITIONS: 
OD = Outside diameter 
T = Wall thickness 
PI = 3.1416 
DR = Dimensional ratio 
IFP = Manufacturers recommended interfacial pressure 
TEPA = Total effective piston area 
DRAG = Force required to move pipe 



Chart A 
TOTAL EFFECTIVE PISTON AREA 
Model 
High Force
Standard 
Medium Force
High Velocity 
Low Force
Extra High Velocity 
No.28 
4.71 
NA 
1.67 
No.412 
11.78 
6.01 
3.14 
No.618 
11.78 
6.01 
3.14 
Trac 500 II 
NA 
6.01 
NA 
No.824 
29.44 
15.32 
9.45 
No.1236 
29.44 
15.32 
9.45 
Trac 900 
NA 
15.32 
NA 
No.1648 
31.42 
14.14 
NA 
No.2065 
31.42 
NA 
NA 


Step 1. Calculating Wall Thickness: 
To determine wall thickness we will be using Example 1 (from above).
The Formula: 
T = 
OD
DR 
= Wall Thickness 
Now using Example 1 and the formula above we will find the wall thickness.
Calculated Wall Thickness: 
T = 
8.625
11 
= .784 

Step 2. Finding Total Effective Piston Area 
Use Chart A (above right) to find the TEPA of your machine.
TEPA = 4.710 (we are using the No.28 as an example) 
Step 3. Calculating Gauge Pressure 
Calculating Gauge Pressure Using the information we have gathered from above.
The Formula 
(OD  T) x T x PI x IFP
TEPA 
+ DRAG = Gauge Pressure 

Step 4. Completed Formula 
Now using all the information from above, and the formula above we will find the gauge pressure.
Calculated Gauge Pressure 
(8.625  .784) x .784 x 3.1416 x 75
4.710 
+ 30 PSI = 
338 PSI 





