Custom Engineering --
Separation Equipment
The Projects Standard Products Cannot Handle
Every standard separator, dryer, and stabilization column on our product pages was designed for a defined set of operating conditions. Real projects frequently fall outside those definitions -- unusual fluid compositions, extreme pressures or temperatures, combined process duties, space constraints, or novel applications. This is where custom engineering begins.
Non-Standard Fluid Compositions
Most separation equipment is designed for "typical" oil field fluids. When your fluid is outside the standard range -- ultra-high H₂S content, mercury-bearing gas, extremely high CO₂, heavy crude with pour point above 40°C, or produced water with elevated salinity -- a catalog product is a starting point at best.
LINSON OIL's process engineers begin from the fluid composition and work forward. The CNOOC Wushi Dehydration and Demercurization Skid began with exactly this kind of challenge.
Combined Process Duties in a Single Skid
EPC projects frequently require that multiple process steps be integrated into a single compact skid with a defined shipping envelope and a single point of responsibility. A separation + dehydration + heating + metering skid cannot be assembled by bolting standard products together.
We design and fabricate these integrated process skids from a single P&ID, with a single FAT that tests the entire system as a unit.
Extreme Operating Conditions
High-pressure reservoirs (>10 MPa), high-temperature wells (>200°C), arctic or desert installations (-50°C to +55°C ambient), sour service with high H₂S, and weight-critical applications all require engineering departures from standard designs.
Material selection, thermal design, structural analysis, and code compliance require engineering judgment. LINSON OIL holds the licenses and maintains the capability to execute systems at these boundary conditions.
First-of-Its-Kind and Pilot Systems
New field development concepts, novel production processes, technology validation projects, and pilot-scale systems require equipment engineered from process fundamentals -- there is no reference design to copy.
LINSON OIL has delivered two government-designated First-of-its-Kind Equipment systems (2024 and 2025) and has the fabrication flexibility to work through the iterative design-build-test cycle that novel projects require.
CNOOC Wushi (Dehydration & Demercurization) · Sinopec Shunbei (Molecular Sieve) · Congo Brazzaville (LNG System) · Sinopec Longfengshan (Condensate Stabilization)
From Blank Page to Commissioned Skid -- What In-House Engineering Actually Means
Many equipment suppliers offer "custom engineering" -- which in practice means forwarding your specification to a third-party engineering firm, receiving a process datasheet, and fabricating to that datasheet without understanding the design basis. The risk is the gap: the mechanical fabricator does not own the process design, and the process engineer does not own the fabrication quality.
LINSON OIL's custom engineering capability is integrated: our process engineers, mechanical designers, instrumentation engineers, and fabrication team work within the same organization. There is no gap to fall into.
Conceptual Process Design
Developing the flow scheme: sequence of separation, heat transfer, and mass transfer operations. Phase behavior analysis and identification of key process variables controlling performance.
Simulation & Sizing
Rigorous simulation software modelling. Outputs: separator diameters, packed heights, heat exchanger duties, vessel volumes, and control valve Cv requirements.
P&ID Development
The master document showing all equipment, piping, instrumentation, control loops, and safety interlocks. Reviewed internally across disciplines before client issue.
Mechanical Design
Vessel design to GB 150 / ASME VIII. Nozzle layouts, lifting calculations, support design, and structural skid design coordinated within the shipping envelope.
Instrumentation & Control
Control philosophy, PLC logic programming, field instrument specification, and control panel engineering. FDS issued for complex systems.
Export & Shipping Support
Export crating, full shipping documentation, customs coordination, and optional onsite commissioning engineers for final installation.
What We Can Engineer and Build for You
| Engineering Discipline | Capability Scope |
|---|---|
| Process Engineering | Phase behavior analysis, process simulation (rigorous thermodynamic modelling), equipment sizing, heat and material balance, P&ID development, HAZOP participation |
| Mechanical Design | Pressure vessel design (GB 150 / ASME VIII), heat exchanger design (GB/T 151 / TEMA), skid structural design, nozzle layout, lifting and support design, pressure relief sizing |
| Piping Design | Skid piping layout (3D modelling available for complex systems), stress analysis for critical lines, pipe support design |
| Instrumentation & Control | Control philosophy development, instrument specification, PLC programming (Siemens / Allen-Bradley / Rockwell), HMI development, SCADA integration, ATEX/IECEx instrument specification |
| Electrical Design | Motor control centre (MCC) specification, hazardous area cable routing, junction box layout, earthing and bonding |
| Quality Engineering | Inspection and test plan (ITP), welding engineering (WPS/PQR management), NDT programme, FAT procedure and execution |
| Commissioning Engineering | Pre-commissioning checklist development, start-up procedure, on-site commissioning team (available for international projects) |
Equipment Types We Custom-Engineer
- Three-phase separators (any configuration/fluid/pressure)
- Two-phase gas-liquid / oil-gas separators
- Vertical and horizontal separators
- High-pressure slug catchers and buffer vessels
- Gas manifolds and knockout drum systems
- Absorption and stripping packed columns
- Molecular sieve dehydration systems (twin/three-tower)
- Condensate stabilization columns with reboiler
- Combined dehydration and mercury removal systems
- Produced water treatment vessels
- Integrated multi-step process skids
Manufacturing Credentials
- 30,000 m² manufacturing base -- dedicated pressure vessel shops, machining, assembly, and testing.
- Special Equipment License (A2 + High-Pressure) -- highest domestic classification.
- Pressure Piping Components License (GC2) -- complete vessel + piping assemblies.
- CNAS Accredited Laboratory -- in-house NDT, hydrostatic, physical & chemical testing.
- Radiation Safety Permit -- enables nuclear-source instrumentation testing.
How We Work With You -- Flexible Engagement
Full Custom Engineering + Fabrication
Client provides: Inlet fluid data and product specs.
We deliver: Complete engineered & fabricated system.
Client Process Design + LINSON Fabrication
Client provides: Approved process datasheets and P&ID.
We deliver: Fabricated equipment to client's design.
Design Review + Fabrication + Optimization
Client provides: Preliminary process design.
We review: Identify risks, optimize materials & sizing, then fabricate.
Long-Term Framework Agreement
For recurring custom requirements. Pre-agreed quality standards, pricing, and manufacturing slots.
Custom Separation Engineering -- The Project Record
CNOOC Wushi -- Dehydration & Demercurization Skid
No existing standard design addressed the combined requirement of deep gas dehydration and mercury removal integrated with crude oil dehydration and LNG liquefaction. LINSON OIL engineered the system from process fundamentals, resulting in a government-designated First-of-its-Kind Equipment.
Congo (Brazzaville) Jiarou -- Associated Gas LNG System
A multi-phase international project requiring complete associated gas recovery, NGL extraction, and LNG liquefaction system engineering. Delivered across three project phases. International project logistics and cross-border technical coordination fully managed in-house.
Sinopec Shunbei No. 5 -- Molecular Sieve Dehydration
Deep dehydration for one of China's most technically demanding upstream gas streams. Standard systems would not have met the dew point specification under these extreme inlet conditions. LINSON OIL engineered the twin-tower system to the specific application.
Sinopec Northwest Bureau -- Joint Station Heating Equipment
Awarded Top 10 Excellent Supplier by Sinopec for 2020 and 2021 consecutive years. Demonstrates sustained high-volume supply capability of custom-engineered heating and separation equipment under the rigorous Sinopec procurement system.
Why "In-House" Matters
Custom projects carry risk at interfaces: between process and mechanical design, engineering and fabrication. Our integrated organization reduces these risks under one quality management system. The process engineer who developed the sizing basis is reachable by the welder's supervisor.
- ✓ Special Equipment Mfg License (A2 + High-Pressure)
- ✓ Special Equipment Mfg License (GC2 Piping)
- ✓ Industrial Pipeline Installation License (GC2)
- ✓ Radiation Safety Permit & CNAS Accredited Lab
- ✓ ISO 9001 / 14001 / 45001 Certified
- ✓ Sinopec & CNPC HSE Certified Supplier
- ✓ 87 Patents (23 Invention + 64 Utility)
- ✓ National "Little Giant" Specialized Enterprise
- ✓ 2024 & 2025 First-of-its-Kind Equipment Awards
Industry-Leading Warranty
Post-Delivery Engineering Support
- Remote process and control engineering support during start-up.
- On-site commissioning engineers available for international projects.
- Process performance review after 3-6 months of operation.
- Capacity expansion and debottlenecking studies for existing systems.
- Critical spare parts management and procurement support.
Your Project Brief Is the Starting Point. Ours Is the Team That Executes It.
Custom separation engineering projects start with a conversation -- not a form. Tell us what you are trying to separate, what conditions you are working at, and what you need the product to look like. Our process engineers will come back with a preliminary process concept within 48 hours. No commitment required at this stage.
Free Engineering Resource
Describe your separation challenge and receive:
- Preliminary process concept & equipment configuration
- Key engineering risk identification
- Relevant past project reference
*Reviewed directly by a LINSON OIL senior process engineer. Response within 48 business hours.
Start the Conversation
LINSON OIL -- Concept to Commissioned Skid | 2× First-of-its-Kind Equipment | 87 Patents | 100+ Engineers | 5,000+ Projects