Abstract: A method and a high-pressure system for determining a flow control variable of a fluid flow flowing through a high-pressure-side high-pressure pump outlet of a high-pressure pump are provided. An externally arranged ultrasonic measuring device measures a flow speed of a fluid flow flowing through a pipe of the high-pressure-side high-pressure pump outlet. A use of an ultrasonic measuring device is provided for determining a flow value to be achieved of a fluid flow flowing through a thick-walled pipe. The ultrasonic measuring device is arranged on the outside on the thick-walled pipe of the high-pressure pump outlet. The pipe has a ratio of the internal diameter to the external diameter of 1:1.5 to 1:5. The ultrasonic measuring device dynamically measures the flow speed of the fluid flow and transmits this measured flow speed to an evaluation unit to compute a current flow value and the flow control variable.

Abstract: The invention relates to a flanged connection for jacketed high-pressure pipes rated for 300 to 10,000 bar, in which the jacket pipe end of at least one of the two jacket-side high-pressure pipe flanged connections is designed as jointed flange, said flange being fixed on the outer side of the high-pressure pipe by means of a jointed connection, said connection being suited to absorb the longitudinal forces in axial direction of the high-pressure pipe and the jointed flange being provided with the bores necessary for the bolts.