(a) Where entrained vapors in gas may liquefy under the anticipated pressure and temperature conditions, the compressor must be protected against the introduction of those liquids in quantities that could cause damage.
(b) Each liquid separator used to remove entrained liquids at a compressor station must:
(1) have a manually operable means of removing these liquids;
(2) have either automatic liquid removal facilities an automatic compressor shutdown device, or a high liquid level alarm where slugs of liquid could be carried into the compressors; and
(3) Be manufactured in accordance with section VIII of the ASME Boiler and Pressure Vessel Code (BPVC) (as described in section 10.3 of this Title) and the additional requirements of paragraph 153(e) of this Part except that liquid separators constructed of pipe and fittings without internal welding must be fabricated with a design factor of 0.4, or less.