Design pressure and nominal pressure of oil and gas recovery pipelines

This post was last edited by ylb913 on 2018-7-20 at 21:12. To be honest, it’s very difficult to obtain fittings with a pressure rating of 1.0 MPa; the fittings commonly used in installations usually have a pressure rating of at least 1.6 MPa.

It is very necessary； At present, the manufacturers involved in VOCs control vary in quality; the operating pressure of oil and gas systems is relatively low. Some manufacturers make the pipe walls very thin, especially for stainless steel pipes, whose wall thickness is only 1–2 mm. In case of accidents such as valves being closed accidentally, the pressure inside the pipes or storage tanks can rise to several tens of kilopascals, which poses a risk of overpressure for both the equipment and the pipes ； The power device used in oil and gas recovery equipment is generally a fan, and its vacuum level also determines the negative pressure at which the pipes operate. In some of Sinopec’s earlier oil and gas recovery systems, the fans caused the pipes to become under negative pressure and lose stability... Therefore, it is very necessary to increase the pressure rating of the pipes. In fact, the emission standards specified in GB 50759-2012 are already quite lenient; Sinopec requires that the total non-methane hydrocarbons level be kept at 50 mg/m3, while benzene levels should not exceed 2 mg/m3