User Guide

Plumbing Design Assistance Manual l Chapter 1 – Uponor PEX properties l 3
Hydrostatic
temperature and
pressure ratings
Through scientic research
and historical experience,
hydrostatic design basis
(HDB) ratings have been
shown to be useful indicators
of relative long-term strength
of thermoplastic materials
when tested under the
conditions specied in test
method ASTM D2837. The
HDB is used to determine the
temperature and pressure
ratings of a specic material.
These temperature and
pressure ratings are
based on an extrapolated life
of 50 years.
Standard PPI TR-3 denes
the policies and procedures
for developing HDB ratings for
thermoplastic piping materials
or pipe.
Uponor maintains standard-
grade ratings for Uponor
AquaPEX piping as tested in
accordance with TR-3. Uponor
AquaPEX carries the following
temperature and pressure
ratings shown in Table 1-4.
Note: Uponor engineered
polymer (EP) and lead-free
(LF) brass ttings carry
the same temperature and
pressure ratings as Uponor
AquaPEX pipe.
Interpolation method
Pressure ratings at different
temperatures are determined
by using a linear relationship
between the standard-grade
ratings. See Table 1-5 for
interpolated temperature and
pressure ratings.
Excessive temperature
and pressure capability
In accordance with ASTM
F876 Standard Specication
for Cross-linked Polyethylene
(PEX) Piping, the excessive
temperature and pressure
capability of Uponor AquaPEX
is 210ºF at 150 psi (99ºC at
10 bar).
This standard requires that
Uponor AquaPEX piping
maintain its integrity for a
period of 720 hours (30 days)
at 210ºF at 150 psi (99ºC
at 10 bar). If installed as
directed, Uponor AquaPEX will
withstand these conditions.
Note: Excessive temperature
and pressure requirements are
always subject to approval by
local building codes
(e.g., temperature and
pressure-relief valves).
ASTM F876 temperature and pressure ratings for SDR9 PEX
Rated
temperature
Hydrostatic design
stress (HDS) psi
Pressure rating
for water psi
73.4°F/23°C 630 160
180°F/82°C 400 100
200°F/93°C 315 80
Table 1-4: Hydrostatic temperature and pressure ratings for
Uponor AquaPEX piping
These listings are published in PPI TR-4, a culmination report of
the listings that are maintained with PPI.
Temperature and pressure ratings
ºF/ºC psi/bar
200.0/93.3 80/5.5
190.0/87.8 90/6.2
180.0/82.2 100/6.9
170.0/76.7 106/7.3
160.0/71.1 111/7.7
150.0/65.6 117.8.0
140.0/60.0 123/8.5
130.0/54.4 128/8.8
120.0/48.9 134/9.2
110.0/43.3 139/9.6
100.0/37.8 145/10.0
90.0/32.2 151/10.4
80.0/26.7 156/10.8
73.4/23.0 160/11.0
60.0/15.6 168/11.6
50.0/10.0 173/11.9
40.0/4.4 179/12.3
Table 1-5: Interpolated hydrostatic temperature and
pressure ratings for Uponor AquaPEX piping