Pressure – Temperature Ratings of Plain EndSeamless chromium – Molybdenum Alloy Steel Pipe
to ASTM A335 Grade P11(1 ¼ % CHROMIUM – ½% MOLYBDENUM)
TEMPERATURE, DEGREES F. 20 to 800
850 900 950 1,000 1,050
ALLOWABLE STRESS “S” PSI 15,000 14,400 13,100 11,000 6,600 4,100PIPE SIZE
INCHES
SCHEDULE
NUMBER
WALL DESIG-NATION
WALL THICK-NESS
INCHES
MAXIMUM WORKING PRESSURE, PSI
½
(0.840)
4080160
-
STDXS–
XXS
0.1090.1470.1880.294
373052526920
11073
358150426643
10630
3258458760439670
2805399253789698
1774258235767065
1102160422224389
¾
(1.050)
4080160
-
STDXS-
XXS
0.1130.1540.2190.308
3059429963939273
2937412761378903
2672375555838099
2290324649237615
1434207032445304
891128620153295
1(1.315)
4080160
-
STDXS-
XXS
0.1330.1790.2500.358
2847396057648538
2733380255348197
2487345850347457
2128298343966872
1328189228674712
825117517812927
1 ¼(1.660)
4080160
-
STDXS-
XXS
0.1400.1910.2500.382
2363328244257106
2268315142486821
2064286638646206
1761246133445541
1091154621363697
67896013272297
1 ½(1.900)
4080160
-
STDXS-
XXS
0.1450.2000.2810.400
2119298343336446
2034286441606188
1850260537845629
1576223232724968
973139620873277
60586712972035
2(2.375)
4080160
STDXS-
0.1540.2180.344
178725794231
171524754062
156022523695
132619243193
81511962034
5067431263
- XXS 0.436 5538 5316 4836 4217 2740 1702
2 ½(2.875)
4080160
-
STDXS-
XXS
0.2030.2760.3750.552
1954270837665820
1876259936165588
1707236532895083
1452202228334442
895126017922900
55678211131801
3(3.500)
4080160
-
STDXS-
XXS
0.2160.3000.4380.600
1693239835985114
1625230334544909
1479209531424466
1256178727033882
771110817062506
47968910601157
3 ½(4.000)
4080
STDXS
0.2260.138
15462208
14842119
13501928
11461643
7021016
436631
4(4.500)
4080120160
-
STDXS--
XXS
0.2370.3370.4380.5310.674
14332076274033794394
13751992263032444218
12511813239329513838
10611543204725353320
649953127515952120
4035927929911317
NOTE :1. Economics and general practice dictate a maximum temperature range of 1050F.2. Max working pressure refered in the table need not be considered for testing the pipes during inspection at supplier works. Refer ASTM
standards for more details regarding test pressure.
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