Pipeline stress issues related to the increase in operating pressure of pipelines
Thread Content
There is a pipeline with dimensions of φ219.1x11.1; the corrosion allowance is 3 mm. The design temperature is 61 degrees, and the design pressure is 2.6 Mpa, while the pressure for hydrostatic testing is 3.0 Mpa. Due to operational requirements, the flow rate needs to be increased to 154 m3/h and the pressure to 3.7 Mpa. The total length of the pipeline is 6.7 km (buried), and the flange grade on the pipeline is 900LB； After changing the design pressure of the pipeline to 3.7 Mpa, I ran a simulation using Caesar II, and there were no issues; the flange leakage analysis also passed. Does this mean that I can increase the pressure in this pipeline to 3.7 Mpa? If that doesn’t work, what other factors need to be considered?
1. Does the medium generate static electricity at this flow rate? 2. Water pressure test at 1.5X3.7 MPa.