Transporting hydrogen
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Our plant’s hydrogenation unit requires a hydrogen delivery rate of 4500 Nm3/h; the pressure at the source of hydrogen is 0.3 Mpa (gauge pressure), while the reaction pressure in the hydrogenation unit is 15.0 Mpa. The delivery distance is 1 kilometer. Please assist us in selecting the appropriate materials, pipe diameter, wall thickness, flow velocity, as well as determining which equipment is needed. Calculate roughly how much the investment in pipeline transportation is.
The material selection also depends on temperature, to be chosen according to Appendix B of SH3059. When selecting the pipe diameter, ensure that the flow velocity does not exceed 8 m/s.
In my opinion, the pressure at the source of hydrogen isn’t very high, so carbon steel is sufficient; however, the pressure within the device is much higher, so alloy steel is preferable. To achieve such high pressures, a compressor will likely be necessary: handshake. This is just for reference. As for wall thickness, I recommend using the standards set by Sinopec. Regarding flow rate, it depends on the amount of hydrogen used by the device to determine the appropriate pipe diameter and flow rate