Approved pressure test specifications and instructions or sketches are available at the test site.
For multi-pressure stage equipment, all manual and automatic valves are checked to be in the correct open/closed position.
All automatic valve operating mechanisms are adequately protected against overpressure.
Pressure tests requiring safety nets, safety shields or other restraints at specified safety distances.
Each pathway is equipped with a 1 . 5 to 3 times the pressure range and calibrated within the last 90 days.
All test pipes and joints are rated within the specified limits.
Each access road is equipped with a safety valve set at 5% of the pressure above the initial test pressure, which has been calibrated and complies with the requirements.
The safety valve is installed directly on the test bench or on the pipeline, and so that the manual valve between the test path and the safety valve is not restricted.
All test joints, test covers and blinds are appropriately rated for the pressure.
All changes in test pressure have been indicated on the test sketch or test instructions and signed off by the design
That the test plan is prepared in such a way of small air separation unit that only one access road is pressure tested at a time and that the sequence of tests begins with the highest pressure value.
The tests are carried out by air, or if not, all enclosed spaces are properly ventilated and the equipment and access to these spaces by employees has the necessary means of detection or there are measures to vent the test gases to the outside.
Dear Air Separation has extensive technical experience from production and design, and pressure tests must be approved by safety officers of small air separation unitin accordance with standard inspection procedures before they can be carried out.
