Regarding the design pressure of the pipeline! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ...1

Within such a small range of pressure, choosing a higher value will not have a significant impact on investments in pipelines and similar components; it is recommended to opt for a higher value

A little higher than 0.6; I think it’s quite risky to have it exactly at 0.6.

If the pipeline is required to be capable of withstanding a brief impact force of 0.6 MPa in its design, then even if the normal operating pressure is 0.1 MPa, or as low as 0.01 MPa, that is still acceptable. According to design principles, the design pressure must be more than 1.25 times 0.6 MPa. That is, above 0.75 MPa. When the design pressure is 0.75 MPa, the test pressure must be 1.25 times that design pressure of 0.75 MPa. That is 0.9375 MPa. So when you construct these pipelines, the flanges, valves, pipes, etc. that you purchase need to be of PN10 standard, which means a pressure of 1.0 MPa is sufficient. I have here a set of UPVC pipes rated for 1.0 MPa, and they also experience such sudden pressure spikes; the pipes burst every time this happens. It was done by people outside. If the instantaneous pressure can reach 0.6 MPa, then it is certainly unreasonable for the pipes to be designed to withstand only 0.6 MPa. If the device is to be sold, it’s best not to skimp on this money. These days, when these pipes and valves are installed outside, people tend to cut corners, and the quality of everything is getting worse and worse. It's better to use something that's safer. For reference only.

The pressure selection must be greater than 1. Consider the impact load frequency; if the frequency is high, fatigue issues need to be taken into account

Test at 1.0 MPa, using the standard. 0.8mpa

It should also be noted that the design pressure mentioned generally refers to conditions at room temperature; if high temperatures are involved, the impact of these temperatures on the design pressure must be taken into account

The design pressure is defined as the value resulting from the combination of temperature under the most unfavorable conditions. If the instantaneous pressure can reach 0.6 MPa, then the design pressure should be higher than this value; if it does not occur very frequently, it is acceptable for the design pressure to be equal to this value. For pipeline pressure testing, the pressure required is 1.5 times for liquids and 1.15 times for gases. At room temperature, there is little difference between 0.6 MPa and 0.1 MPa for ordinary metal pipes, and all the pipe components can withstand these pressures. Non-metallic pipes may increase the cost

The classification of pressure pipeline grades is designed to be used in conjunction with pipeline flanges, gaskets, valves, and other related components! Should I choose the European standard or the American standard? Each design institute has its own pipeline grade table! Please confirm the corresponding relationship between the front and the back first! This way, the selection is more scientific, right?