Protective coating for petroleum pipe
September 12, 2018
DIN17175 seamless Heat Exchanger Tubes
October 10, 2018
Seamless steel pipe calculate the pressure capacity
The calculation method of the pressure bearing capacity of the seamless steel pipe is as follows. Let us choose a practical case to explain:
DN=10MM, wall thickness is 3mm
Let the tensile strength of the material be σ, the pressure be P, the outer diameter of the pipe D; the
wall thickness of the pipe δ=(P*D)/(2*σ/S)
where S is the safety factor;
Because P is less than 7 MPa, S is selected as S=8; P is less than 17.5 MPa, S is selected as S=6; P is greater than 17.5 MPa, S is selected as S=4;
we choose safety factor S=6; and 20 steel tensile strength is 410 MPa ,
Therefore, the pressure that the pipe can withstand P=(2*σ/S*δ)/D
=(2*410/6*3)/(10+6)
=26.25MPa>Set the 17.5,
so the safety factor is S=4
Therefore, the pressure that the pipe can withstand P=(2*σ/S*δ)/D
=(2*410/4*3)/(10+6)
=39.375MPa
According to this formula, you can easily calculate the pressure bearing capacity of seamless steel pipes of various specifications.
