Cast Polyurethane Components for Oil & Gas Equipment
Oil and gas components may face abrasive solids, hydrocarbons, drilling fluids, brines, gas exposure, pressure cycling, impact and temperature changes. Cast polyurethane can be considered for wear, sealing, scraping, cushioning and pipe-handling components. Final suitability requires grade-specific compatibility data, pressure and extrusion design, temperature limits, rapid-gas-decompression review, testing and applicable industry standards.
Material Selection Considerations for Oil & Gas
- Abrasion, cut and tear resistance: Performance depends on solids, velocity, lubrication, impact, geometry and the polyurethane grade. Compare candidate materials with an applicable test method and field inspection data.
- Chemical and sour-service compatibility: Resistance varies by formulation. Crude oil, drilling mud, brine, additives, H₂S, CO₂ and cleaning chemicals must be evaluated at the actual concentration, temperature, pressure and exposure time; immersion data alone does not qualify a component.
- Pressure, extrusion and impact design: Datasheet strength is not an allowable working pressure. Seals, valve components and pig elements require review of pressure differential, extrusion gaps, decompression, impact, tolerances, safety factors and validation testing.
- Temperature and decompression limits: Operating limits are grade-specific and depend on continuous or intermittent exposure, pressure, media and gas saturation. Provide the full temperature cycle and shutdown or depressurization conditions.
주요 응용 분야
- V-groove rollers for pipeline handling and conveyors: specify pipe diameter, coating, roller load, contact angle, speed, outdoor exposure and allowable surface pressure.
– Pipeline pigs and spheres for batching, separation or cleaning: specify line size, internal diameter, medium, pressure, temperature, speed, bypass and cup or disc geometry.
– Subsea and offshore bend-restrictor components: design depends on minimum bend radius, tension, installation loads, fatigue, seawater exposure and project qualification requirements.
– Molded impact or wear protection for pipeline elbows: structural pressure reinforcement requires a separately engineered system and should not be inferred from a polyurethane cover.
– Mud-pump pistons and valve elements: formulation, fabric or metal reinforcement, seal geometry, fluid, solids, pressure cycle and test requirements must be defined.
– Thread-die and connection protectors: specify thread form, handling loads, oils, temperature, fit and reuse requirements.
- Cups, discs and sealing elements for inspection or cleaning pigs: polyurethane provides contact and sealing functions; the inspection capability is supplied by the complete pig system.
– Drill-pipe and casing protective sleeves: specify pipe size, contact pressure, rotation, abrasion, fluid and installation method.
– Pipeline-joint gaskets and sealing rings: manufacture only to the approved drawing, material specification, pressure class and qualification test plan.
– Pipeline outer-wall protective components and linings: surface preparation, adhesion, thickness, temperature, soil or seawater exposure and cathodic-protection compatibility must be reviewed.
– Drilling-platform shock absorbers and bumpers: define impact energy, stroke, preload, dimensions, mounting and weather exposure.
– Wellhead valve seals and valve elements: require grade-specific media compatibility, extrusion control, pressure and temperature qualification, tolerances and documented testing.
– Platform fenders and anti-collision blocks: specify impact energy, contact geometry, mounting, UV, seawater and temperature exposure.
– Marine cable protective sleeves: specify cable diameter, bend radius, tension, abrasion, seawater, UV and installation method.
