Shop tests are where most rotating equipment problems are found
Rotating equipment is checked mainly by testing. The value of the inspection is in confirming that the test is set up correctly, that the instruments are calibrated, and that the results are compared with the datasheet tolerances, not the manufacturer’s reading of them.
Where rotating equipment is built in China
Pump and compressor manufacturers are concentrated in Shanghai, Jiangsu, Zhejiang, Shenyang and Dalian, with turbine and large compressor works in Sichuan and Heilongjiang.
Non-conformances we find most often
- Vibration above the acceptance limit during the mechanical run.
- Performance curve outside the tolerance band at rated point.
- Test bench instruments without valid calibration.
- Nozzle orientation or baseplate dimensions different from the GA drawing.
- Preservation not suitable for long-term storage on site.
Questions buyers ask
What happens if a pump fails its performance test?
The inspector records the result, marks the test as not accepted and issues a non-conformance. The manufacturer usually trims the impeller or corrects the issue and repeats the test, which we witness again.
Can you witness tests remotely?
Video witnessing is possible if the buyer and project allow it, but most specifications require an inspector at the test bench for hold points. We can combine an on-site inspector with a live video feed for your engineer.