.: ROTATING EQUIPMENT :.
We provide engineering services to design, align/connect, and troubleshoot piping connected to rotating equipment (pumps, turbines, compressors, fans, etc).
We design piping connected to rotating equipment to meet 3 criteria:
1. Piping stresses are below ASME B31.1 or B31.3 allowable values.
2. Piping loads on rotating equipment nozzles are below their respective allowable values (NEMA SM23, API610, API674, API676, etc) during ambient and operating conditions.
3. The piping flange will remain aligned with the rotating equipment when installed and disconnected.
Having problems aligning piping to a rotating equipment nozzle? One of the 3 criteria above was not met, or a construction error has occurred. Let us solve your problem!
Overloaded equipment can and often does run adequately for some length of time. However, significantly overloaded equipment eventually starts having problems.
Does your rotating equipment have any of these issues?
1. Constant high vibrations
2. Vibrations levels increasing over the years
3. Bearings and seals wear out quickly
4. Requires hot alignment to reduce vibrations
If equipment issues (rotor balance, bearing and shaft alignment, fluid conditions, etc) have been investigated and ruled out, then high piping loads may be the problem. Let us analyze your piping system and make recommendations to reduce piping loads to acceptable levels.
Construction Errors or Inexperience often cause flange alignment problems. Common construction issues include the following:
1. Incorrect adjustment of spring hangers, strut rods, and other supports.
2. Incorrect installation sequence of supports and restraints.
3. Piping is not fabricated starting at the machine nozzle then working away from it.
4. Fabricators use dimensional tolerance of +/- 1/8”. Flange alignment tolerances are generally less than 0.010”
5. Temporarily using come-a-long, portapower, jack screws, etc, to force the piping into position. When these are released the loads are transferred onto the machine.