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» Technical » ASME SA-335/ ASTM A335 Gr. P11 Applied to BPVC

ASME SA-335/ ASTM A335 Gr. P11 Applied to BPVC

September 25, 2020

Seamless pipes made of ASME SA-335/ ASTM A335 Grade P11 can be used for applications designed in accordance with a series of ASME Boiler & Pressure Vessel Codes. It has the nominal chemical composition of 1.25Cr-0.5Mo-Si and UNS number of K11597. The ASTM A335 P11 seamless pipe can be applied to ASME BPVC Section I, Section III, and Section VIII.

Maximum Temperature Limits

ASME SectionMax. Temp. °C
I649
III Cl. 2 & 3371
VIII Div. 1649
III Div. 1
Cl. 1 & MC
371
III Div. 3
Cl. TC & SC
371
VIII-2 Cl. 1482
VIII Div. 2649
*The maximum use temperature limits for ASME SA-335/ ASTM A335 Gr. P11 seamless pipes in different Sections of ASME BPVC.

Maximum Allowable Stress

Temp.S
40118
65118
100118
125118
150118
200116
250112
300109
325108
350106
375104
400102
42599.5
45096.9
47594.7
50072.9
52551.0
55036.7
57525.1
60017.6
62512.4
6508.08
*Maximum allowable stress values for ASME SA-335/ ASTM A335 Gr. P11 seamless pipes used for Section I; Section III, Classes 2 and 3; Section VIII, Division 1. Extraced from Table 1A of Section II, Part D.
*S & Temp.: maximum allowable stress, MPa, for metal temperature, °C, not exceeding.

Temp.S
40138
65131
100126
125124
150121
175119
200116
225115
250113
275111
300109
325107
350106
375104
400102
42599.6
45097.2
47594.5
50073.7
52552.0
55036.3
57525.2
60017.6
62512.3
6508.12
*Maximum allowable stress values for ASME SA-335/ ASTM A335 Gr. P11 seamless pipes used for Section VIII, Division 2; extracted from Table 5A of Section II, Part D.
*S & Temp.: maximum allowable stress, MPa, for metal temperature, °C, not exceeding.

Design Stress Intensity

Temp.
°C
Design Stress
Intensity, MPa
40138
65132
100127
125124
150121
200116
250112
300109
325108
350106
375104
400102
42599.5
45097.0
47594.5
50092.0
*Design stress intensity for ASME SA-335/ ASTM A335 P11 seamless pipes used for Section III, Division 1, Classes 1 and MC; Section III, Division 3, Classes TC and SC; and Section VIII, Division 2, Class 1.

Tensile Strengths at Elevated Temperatures

Temp.
°C
Tensile Strength
MPa
40414
100414
150414
200414
250414
300414
325414
350414
375414
400414
425414
450404
475390
500371
525349
*The tensile strengths of ASME SA-335/ ASTM A335 P11 at elevated temperatures for design calculation purpose. The miminum tensile strength at room temperature is 415 MPa. All values are extracted from Table U of Section II, Part D.

Yield Strengths at Elevated Temperatures

Temp.
°C
Yield Strength
MPa
40207
65197
100190
125185
150181
175178
200175
225172
250169
275166
300164
325161
350158
375155
400153
425149
450145
475142
500137
525132
*The yield strengths of ASME SA-335/ ASTM A335 P11 at elevated temperatures for design calculation purpose. The miminum yield strength at room temperature is 205 MPa. All values are extracted from Table Y-1 of Section II, Part D.

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