The pressure rating of seamless steel pipe depends on outside diameter,wall thickness,material grade,temperature,and standards(ASME B31.3,API 5L,GB/T,etc.).Below is practical,SEO-friendly content you can use directly.
Key Formula(Bar/Psi)
P=Working pressure
S=Allowable stress of material
t=Wall thickness
D=Outside diameter
General Pressure Range
Light-wall seamless pipe
SCH 5S/SCH 10S
Pressure:10–40 bar(145–580 psi)
Used for low-pressure fluids,general piping.
Standard-wall seamless pipe
SCH 40/STD
Pressure:40–100 bar(580–1,450 psi)
Common for water,oil,gas,process piping.
Heavy-wall seamless pipe
SCH 80/XS/SCH 160
Pressure:100–320 bar(1,450–4,640 psi)
For high-pressure hydraulic,boiler,high-pressure gas.
Extra-heavy&alloy seamless pipe
XXS/thick-wall alloy steel
Pressure:320–800 bar+(4,640–11,600 psi+)
For high-temperature,high-pressure,oil drilling,power generation.
Factors That Reduce Pressure Rating
Higher operating temperature lowers allowable stress.
Corrosion or erosion reduces effective wall thickness.
Different standards(ASME,API,GB)use different safety factors.
Short Summary for Website
Seamless steel pipe offers much higher pressure ratings than welded pipe.
Light-wall designs handle low to medium pressure,while heavy-wall and alloy seamless pipes safely carry high-pressure and high-temperature fluids in oil,gas,power,and industrial systems.
GB/T 7714
Zhang Xiao,Zhao Xinwei,Li Lifeng,etc Comparative analysis of high-pressure gas transmission performance between spiral seam submerged arc welded pipe and seamless pipe[J].Pressure Vessel,2018,35(08):11-16
MLA
Zhang,Xiao,et al.“Comparative Analysis on High-Pressure Gas Transmission Performance of Spiral Submerged Arc Welded Pipe and Seamless Pipe.”Pressure Vessel Technology,vol.35,no.8,2018,pp.11-16.
APA
Zhang,X.,Zhao,X.,Li,L.,et al.(2018).Comparative analysis on high-pressure gas transmission performance of spiral submerged arc welded pipe and seamless pipe.Pressure Vessel Technology,35(8),11-16.
