3K160

Inspect for labyrinth piston clearances, measure wear on throttling points, verify no metal-to-metal contact in sealing zones, check for gas leakage at rod gland, perform dye penetrant testing on piston rods for micro-cracks. Critical for cryogenic operation at -160°C.

Verify material certifications for all cylinders and pistons (austenitic stainless steel or equivalent for -160°C service), test impact strength at cryogenic temperatures, inspect for frost cracking or thermal stress fractures, verify welding procedures per ASME BPV Code Section VIII for cryogenic service, check thermal cycling history for material degradation.

Check water inlet/outlet connections for scaling or blockage, verify cooling water chemistry (inhibitor concentration, pH, hardness), inspect internal cooling passages using boroscope if applicable, measure differential pressure across coolers, test for corrosion product accumulation, ensure cathodic protection if applicable for marine environment.

Verify anti-vibration mount condition and load distribution using dial indicators, check bolt torque on skid feet to foundation (re-torque after 100 operating hours), measure vibration levels at crankshaft bearing housings and compressor frame (ISO 10816 compliance for marine), inspect for foundation cracking or erosion in marine environments, verify piping strain relief to prevent resonance.

Perform gas sample analysis (GC-TCD) for hydrocarbon carryover from labyrinth oil-free design, measure valve pop pressures and re-seating reliability, inspect valve seats under magnification for erosion patterns or debris embedding, verify no lubrication cross-contamination in gas discharge lines, check for particulate generation in multi-stage systems, perform pressure drop testing across valve assemblies.