Plastic Piping Rated Pressure Calculators

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Plastic Pipe Rated Pressure

Calculate plastic pipe maximum allowable design pressure from pipe schedule diameter and wall thickness or dimension ratio.

Use the Result Table option to display the results for the selected pipe diameter. The dimension ratio is based on the Renard R10 series. The standard dimension ratio SDR equals R10 + 1 and is calculated from the outside diameter divided by the pressure design wall thickness. The standard internal dimension ratio SIDR equals R10 - 1 and is calculated from the inside diameter divided by the pressure design wall thickness. The pressure design wall thickness is equal to the nominal wall thickness minus the fabrication allowance and the mechanical allowance. The mechanical allowance includes allowances for threads, machining, glueing, corrosion, erosion, and mechanical damage.

The allowable pressure can be calculated directly from the dimension ratio and the minimum required strength (MRS). A service design coefficient (C value) of 1.25 is suitable for water pipes. For other fluids a higher C value should be used.

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CALCULATOR : Plastic Pipe Pressure Rating [FREE] ±

Calculate plastic pipe nominal pressure rating from pipe diameter, either wall thickness or dimension ratio, and the minimum required strength (MRS).

Select the pipe schedule (NPS or ISO), pipe diameter and wall thickness or dimension ratio (SDR or SIDR), or use the user defined option. The dimension ratio is calculated from the pressure design wall thickness (nominal wall thickness minus fabrication allowance and mechanical allowance). Use the Result Table option to display the pipe schedule with unit mass and total mass for the selected diameter.

Tool Input

schdtype : Schedule Type
diamtype : Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- DRu : User Defined Dimension Ratio SDR OR SIDR
ttoltype : Wall Thickness Fabrication Tolerance Type
- xfu : User Defined Negative Wall Thickness Fraction
- tfu : User Defined Negative Wall Thickness Allowance
cfactype : Service Design Coefficient Type
- Cu : User Defined Service Design Coefficient
c : Wall Thickness Mechanical Allowance
MRS : Minimum Required Strength

Tool Output

C : Service Design Coefficient
CVG : Convergence Factor
DR : Pipe Dimension Ratio (SDR Or SIDR)
ID : Nominal Inside Diameter
OD : Nominal Outside Diameter
Pr : Rated Pressure (From Dimension Ratio)
Sd : Design Stress
tf : Wall Thickness Fabrication Allowance
tm : Minimum Wall Thickness
tn : Nominal Wall Thickness
tp : Pressure Design Wall Thickness

Plastic Pipe Rated Pressure

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