Appropriate temperature de rating factors must be applied to determine the maximum allowable pressure when working at elevated temperatures greater than 73f.
Pvc sdr pipe pressure ratings.
It is commonly recommended to limit these.
Where dn is the nominal outside diameter of the pipe and en is the nominal minimum wall thickness of the pipe.
Pipe series s is a dimensionless number related to the nominal outside diameter and wall thickness of a pipe.
Adjustments may be required for pressure variations.
Therefore a higher sdr indicates a thinner walled pipe at any given diameter.
3 dimensions pressure ratings pipe type o d.
Pipe series s.
The pressure ratings shown are for water non shock 73f with plain end pipe.
The pressure ratings shown are based on astm d2241 sdr class and astm d1785 schedule 40 80 pipes.
S pipe series.
Awwa c900 dr18 pipe has a pc of 235 psi for the 4 inch size through the 60 inch size.
S p dn en.
S sdr 1 2 2 where.
They are highly resilient with high tensile and high impact strength.
As a consequence a high sdr pipe has a low pressure rating and low sdr pipe has a high pressure rating.
Pvc pr 160 pr 200 and pr 315 are for pressure systems where temperatures will not exceed 140 f.
Pvc cpvc molded fittings do not have a pressure rating.
These ratings are based on a constant pressure.
Astm d2665 standard specification for poly vinyl chloride pvc plastic drain waste and vent pipe and fittings dimensions pvc drain waste and vent pipe dimensions.
Size sdr lh pip 91 80 pip 51 100 pip 41 125 pip 32 5 cl 63 ips 64 cl 100 ips 41 sewer psm 35 cl 125 ips 32 5 cl 160 ips 26 cl 200.
The maximum service temperature for pvc is 140f.
The pressure rating is only for pipes.
For sdr sizes either the sdr designation for example sdr21 or the working pressure for example 200 psi except that if the pipe is intended for pressurized use the pressure rating in psi must be shown.
The maximum pressure rating for sdr pipe remains the same at different diameters.
The pipe series s can be calculated as.
The relationship between the sdr and the pressure rating is given by lames formula for the hoop stress in thick wall cylinders.
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