Piping; Process Gas Piping - GE H301 Series Operating Manual

48 | Chapter 4: Installation
6. Verify the hold down bolting torque and soft foot checks quarterly. See the
"Quarterly maintenance checklist"

Piping

Process gas Piping

Install all compressor suction and discharge process gas piping as follows:
1. The suction and discharge piping should never be smaller than the
compressor suction and discharge pipe flange connections.
The only exception to this minimum piping size requirement is
2. All piping should be thoroughly cleaned internally of weld slag, mill scale, and
other construction debris before installation.
3. Avoid using a skid or underground inlet piping loops that can trap liquids
("pee" trap affect). Liquids can accumulate, with resulting liquid carry over into
scrubbers and cylinders. This can result in major damage to the scrubber and
the internals of the compressor cylinder.
4. Install an inlet gas scrubber(s), whenever wet or dirty gas is being compressed,
on the suction lines to each 1st stage or side stream stages .
5. Piping should be connected to the compressor strain free, in such a way that
undue thermal or mechanical stresses are placed on the compressor.
6. Install liquid separators, with ample capacity and drainage, to remove the
condensate in the piping leaving the coolers. Also, install drain valves in all
"low spots" in the piping.
7. Design and install the inlet piping to all cylinders so that no incompressible
materials (dirt, liquids or foreign materials) can enter the compressor. During
the first few weeks of operation, a temporary inlet strainer, similar to that
shown in "Figure 10", can be installed.
8. All cylinder bottle supports must be "loose" when "cold" and no adjustments
should be made until the compressor has warmed up. The cylinder and
crosshead guide bores should be level and not distorted when the bottle
supports are correctly adjusted. Make the final bottle support adjustment
when the compressor cylinders have reached their normal (hot) operating
temperatures.
specifically designed choke tubes.
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)