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.