Q235B spiral steel pipe is a more commonly used spiral steel pipe. Q235B steel pipes are commonly used in oil and gas pipelines, water pipelines, sewage works, piling works, steel supports, etc. The mechanical properties and chemical composition of Q235B steel pipe are as follows.
Q235B steel pipe is made of carbon steel, Q means that the yield strength is 235Mpa, the tensile strength is 370-500Mpa, the chemical composition is C less than or equal to 0.20, SI is less than or equal to 0.35, the content of Mn is less than or equal to 1.4, S is less than or equal to 0.045, and P is less than or equal to 0.045. Q235B spiral steel pipe has excellent elongation, strength and good ductility and casting performance.
There are two commonly used standards for Q235B spiral steel pipes, one is the national standard GB/T9711, the oil and gas industry transmission steel pipe, and the other is SY/T5037 spiral steel pipe for low-pressure fluid transmission. The prices of the two standard steel pipes are different, and their application uses are also different.
National standard spiral steel pipes are mainly used in oil and gas pipelines and municipal pipelines with stricter requirements, while 5037 standard spiral steel pipes are mainly used in relatively wide pipelines such as water supply and drainage projects and sewage pipelines.
