Pipe Wall thickness
Calculation Procedure for Internal Pressure (ASME B 31.3)
******************************************************************
Step1: Select the Pipe Material
--------------------------------------------------------------------------------------------------------
Step2: List Down
Ø Pipe Outside Diameter, (mm) = D
Ø Internal Design Pressure,(Kg/cm²) = P
Ø Design Temperature, (C°) = T
Ø Internal Design Pressure,(Kg/cm²) = P
Ø Design Temperature, (C°) = T
For the material under consideration.
--------------------------------------------------------------------------------------------------------
Step 3: List down
Ø Allowable Stress, (Kg/cm²) = S
ASME B 31.3 @ Design Temperature.
(TABLE A-1)
--------------------------------------------------------------------------------------------------------
Step 4: Select
Ø Joint Efficiency factor = E (TABLE A-1A)
Ø Temperature Co-efficient = Y (TABLE-304.1.1)
ASME B 31.3 (TABLE-1A)
--------------------------------------------------------------------------------------------------------
Step 5: Select
Ø Corrosion Allowance, (mm) = c
--------------------------------------------------------------------------------------------------------
Step 6: Formula @ ASME B 31.3
P*D
tm = ----------------------
+ c
2*[(S*E) + (P*Y)]
tm= Calculated thickness including corrosion Allowance, (mm).
--------------------------------------------------------------------------------------------------------
Step 7: Selection of pipe Schedule No.
TN
Ta = ---------------
[1-(e/100)]
Ta = Thickness for selected pipe
TN = Available Thickness for selected pipe @
Sch No.
e = Mill Tolerance
--------------------------------------------------------------------------------------------------------
Step 7: Compare thickness
If Ta > tm
Then selected thickness of pipe is OK
--------------------------------------------------------------------------------------------------------
Acknowledges for penmanship such a worthy column, I stumbled beside your blog besides predict a handful advise. I want your tone of manuscript...
ReplyDeletestanding water in sewer pipe