Design Pressure
SDR
at 23 degrees C (73 Degrees F)
S = 8.62 MPa
(1,250 psi)
S = 11 MPa
(1,600 psi)
11
550 kPa
(80 psig)
690 MPa
(100 psig)
13.5
415 kPa
(60 psig)
550 kPa
(80 psig)
17
345 kPa
(50 psig)
415 kPa
(60 psig)
21
275 kPa
(40 psig)
345 kPa
(50 psig)
26
207 kPa
(30 psig)
275 kPa
(40 psig)
Where the buried pipe system is expected to exceed
23 degrees C (73 degrees F) at the design pressures
stated above, alternate materials must be used.
**************************************************************************
Polyethylene pipe, tubing, fittings and joints shall conform to ASTM D 3350
and ASTM D 2513, pipe designations PE 2406 and PE 3408, rated SDR [_____]
or less, as specified in ASME B31.8. Pipe sections shall be marked as
required by ASTM D 2513. Butt fittings shall conform to ASTM D 3261 and
socket fittings shall conform to ASTM D 2683. Fittings shall match the
service rating of the pipe. Minimum wall thickness shall be [_____].[
Polyethylene pipe, tubing, and fittings shall be recommended by the
manufacturer for use with LPG.]
2.1.8
Fiberglass Pipe, Fittings and Adhesive
**************************************************************************
NOTE: Before selecting polyethylene or fiberglass
pipe material, the gas supplier should be contacted
for a gas analysis to determine the types of
chemicals which will be in the gas he will supply.
Suitable polyethylene or fiberglass pipe materials
must be selected based on the gas analysis.
Reinforced thermosetting plastic (fiberglass
reinforced plastic) shall not be used for gas lines
with design pressures above 690 kPa (100 psig) or
with operating temperatures below 29 degrees C
(minus 20 degrees F) or above 66 degrees C (150
degrees F).
For reinforced thermosetting plastic (fiberglass
reinforced plastic) pipe sizes from 50 mm through
150 mm (2 inches through 6 inches), select minimum
wall thickness based on ASME B31.8, table 842.33(c).
**************************************************************************
Fiberglass pipe, fittings and adhesive shall conform to ASTM D 2517.
Pipe
sections shall be marked as required by ASTM D 2517. Minimum wall
thickness shall be [_____].
SECTION 02556A
Page 12
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