carbon seamless steel pipe

API 5L pipe, ASTM A106B pipe
high pressure boiler pipe
OD: 20mm-325mm
wall thick: 20mm-70mm
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Standard codes
Models of steel tubes
Chemical compositions
C
SI
Mn
P
S
Cr
Mo
Cu
ASME SA106
SA106B
0.17-0.25
≥0.1
0.7-1.00
≤0.030
≤0.030



SA106C
0.23-0.27
≥0.1
0.70-1.00
≤0.030
≤0.030



ASME SA333
SA333
0.09-0.12

0.7-1.00
≤0.030
≤0.030



SA333
0.09-0.12
≥0.1
0.9-1.10
≤0.030
≤0.030



ASME SA335
SA335 P11
0.05-0.15
0.50-1.0
0.30-0.60
≤0.030
≤0.030
1.00-1.50
0.50-1.00

SA33512
0.05-0.15
≤0.50
0.30-0.60
≤0.030
≤0.030
0.80-1.25
0.44-0.65

SA335 P22
0.05-0.15
≤0.05
0.30-0.60
≤0.030
≤0.030
1.90-2.60
0.87-1.13

SA335 P5
≤
≤0.05
0.30-0.60
≤0.030
≤0.030
4.00-6.00
0.45-0.65

SA335 P91
0.08-0.12
0.20-0.50
0.30-0.60
≤0.020
≤0.020
8.00-9.50
0.85-1.05


Note: Generally, low-mid pressure boiler pipe’ working pressure below 5.88Mpa and working temperature below 450°C. High pressure boiler pipe’s working pressure above 9.88Mpa and working temperature between 450°C to 650°C.