Research on Material Selection Method and Brittle Fracture Mechanism of High-Pressure Pipeline

Table 1

Critical wall thickness and limit bearing internal pressure of different kinds of steel (outer radius b = 500 mm).

Material	Yield ratio	Outer radius (mm)	Inner radius (mm)	Critical wall thickness (mm)	Limit bearing internal pressure (MPa)
X80	0.89	500	448	52	68.15
Q235	0.51	500	293	207	224.67