API Resources
API Pressure Classes
API 6A required equipment to be designed to one of the following maximum rated working pressures.
2,000 psi
3,000 psi
5,000 psi
10,000 psi
15,000 psi
20,000 psi
2M psi
3M psi
5M psi
10M psi
15M psi
20M psi
13.8 MPa
20.7 MPa
34.5 MPa
69.0 MPa
103.5 MPa
138.0 MPa
Material Class
AA – General Service
BB – General Service
CC – General Service
DD – Sour Service
EE – Sour Service
FF – Sour Service
HH – Sour Service
Body – Bonnet – Outlets
Carbon or Low Alloy
Carbon or Low Alloy
Stainless
Carbon or Low Alloy
Carbon or Low Alloy
Stainless
CRA
Pressure Controlling
Carbon or Low Alloy
Stainless
Stainless
Carbon or Low Alloy
Stainless
Stainless
CRA
API 6A Temperature Class
Charpy Impact Requirements
Classification
K – -75°F (-60°C)
L – -50°F (-46°C)
N – -50°F (-46°C)
P – -20°F (-29°C)
S – 0°F (-18°C)
T – 0°F (-18°C)
U – 0°F (-18°C)
V – 0°F (-18°C)
PSL 1
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
PSL 2
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
PSL 3
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
15 ft-lbf (20) J
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