Calculating method of pressure of SA335 P9 seamless steel pipe by knowing the outside diameter, specifications and wall thickness of SA335 P9 seamless pipe:
Pressure = (wall thickness*2* tensile strength of SA335 P9 seamless steel pipe) / (outer diameter * coefficient)
The method of calculating the thickness of SA335 P9 seamless steel pipe with external diameter and pressure:
Wall thickness = (pressure * outer diameter * coefficient) / (2* tensile strength of SA335 P9 seamless steel pipe)
Expression of pressure coefficient of SA335 P9 seamless steel pipe:
Pressure P<7Mpa, coefficient S=8
7< SA335 P9 seamless steel pipe pressure P<17.5, coefficient S=6
Pressure P>17.5, coefficient S=4
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