The relationship between the sdr and the pressure rating is given by lames formula for the hoop stress in thick wall cylinders.
Pvc sdr pipe pressure ratings.
Pvc cpvc molded fittings do not have a pressure rating.
S sdr 1 2 2 where.
It is commonly recommended to limit these.
These ratings are based on a constant pressure.
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.
Adjustments may be required for pressure variations.
Appropriate temperature de rating factors must be applied to determine the maximum allowable pressure when working at elevated temperatures greater than 73f.
The pipe series s can be calculated as.
Where dn is the nominal outside diameter of the pipe and en is the nominal minimum wall thickness of the pipe.
As a consequence a high sdr pipe has a low pressure rating and low sdr pipe has a high pressure rating.
The maximum service temperature for pvc is 140f.
The maximum pressure rating for sdr pipe remains the same at different diameters.
Pipe series s.
Pvc pr 160 pr 200 and pr 315 are for pressure systems where temperatures will not exceed 140 f.
Conversion chart for pressure ratings at various temperatures for cresline pvc pipe temperature f 73 4 80 90 100 110 120 130 140 conversion factor 1 00 88 75 62 50 40 30 22 pressure rating is the estimated maximum pressure that water as the medium in the pipe can.
Pipe series s is a dimensionless number related to the nominal outside diameter and wall thickness of a pipe.
The pressure ratings shown are based on astm d2241 sdr class and astm d1785 schedule 40 80 pipes.
Astm d2241 poly vinyl chloride pvc pressure rated pipe sdr series dimensions dimensions of pvc pipe sdr series.
The pressure ratings shown are for water non shock 73f with plain end pipe.
They are highly resilient with high tensile and high impact strength.
3 dimensions pressure ratings pipe type o d.
The pressure rating is only for pipes.
S p dn en.
Awwa c900 dr18 pipe has a pc of 235 psi for the 4 inch size through the 60 inch size.
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.
Dr for pvc pipe designed for internal pressure for pvc pressure pipe a product with a particular hydrostatic strength and dr will have the same pressure class pc or pressure rating pr no matter what the size.
