Does anyone have a procedure for the testing oF instrument impulse tubing.
The service pressure is 360bar, hydraulic fluid ie Glycol/water mix. Typicaly the tubing operates shutdown valves on a offshore installation. Tubing 316 SS, 3/8. 1/2, 9/16.
You make a small impulse connection portion from the sample coil which can be connected to a pressure gauge of 0 to 600 bar.Then conduct a test like testing the gauge at 360 bar , 396 bar in steps of 10% increase upto 130% from the rated pressure.
This gives the indication whether the impulse tubing is capable of withstanding the rated pressure.