JJPellin
Mechanical
- Oct 29, 2002
- 2,195
It has been about 25 years since I was heavily involved in grouting in a reciprocating compressor. At that time, our point of view was that full-bed grout was the best option for good reliability and long life. I seem to recall that we considered using epoxy chocks but decided against it. I don’t recall why. We are just getting ready to remove and regrout one of our compressors and had a foundation and grout contractor suggest that we should consider chocks. We contacted a recip compressor expert at one of our other plants and they agreed. I am looking for suggestions regarding the pros and cons of using steel or epoxy chocks rather than full-bed grout for a reciprocating gas compressor. Here are the particulars on the compressor:
Dresser Rand Model: XHH-VL-2 (two cylinders, two stages)
Driver: 3,500 HP synchronous motor
Service: 1200# make-up hydrogen for refinery hydrotreaters
The frame needs to be removed and regrouted because the frame extensions have broken free from the grout cap and are moving. This has resulted in movement between the frame extensions and the cylinders. We also have a lot of cracks with oil seeping out of them. I have included a picture to show some of the condition issues. It was probably a bad grout job originally with the frame extension using a separate grout pour from the rest of the frame. The frames were originally installed in 1993 with full bed epoxy grout during the original construction of the process unit.
Thanks for any feedback you can provide.
Johnny Pellin
Dresser Rand Model: XHH-VL-2 (two cylinders, two stages)
Driver: 3,500 HP synchronous motor
Service: 1200# make-up hydrogen for refinery hydrotreaters
The frame needs to be removed and regrouted because the frame extensions have broken free from the grout cap and are moving. This has resulted in movement between the frame extensions and the cylinders. We also have a lot of cracks with oil seeping out of them. I have included a picture to show some of the condition issues. It was probably a bad grout job originally with the frame extension using a separate grout pour from the rest of the frame. The frames were originally installed in 1993 with full bed epoxy grout during the original construction of the process unit.
Thanks for any feedback you can provide.
Johnny Pellin