Industrial Centrifuge Systems for EPC Contractors

Built for EPC Scope, Not Just Equipment Supply

An EPC centrifuge package is not only a separator. It must fit the plot plan, match the hazardous-area basis, satisfy document control, pass inspection hold points, ship correctly, and arrive with the records needed for commissioning.

Dolphin Centrifuge designs and builds complete industrial centrifuge packages around real project requirements. A typical package may include a reconditioned disc stack or decanter centrifuge, feed pump, heating system, local control panel, instrumentation, valves, interconnecting piping, structural skid, manuals, inspection records, and final documentation.

For EPC contractors, the practical value is simple: one centrifuge supplier that understands drawings, submittals, battery limits, factory testing, controls, procurement timing, and the detail language used inside bid packages.

Typical EPC centrifuge packages cover

• Lube oil conditioning and reclamation systems
• Fuel oil purification modules
• Process oil and distillate separation systems
• Offshore and marine centrifuge installations
• Skid-mounted centrifuge systems for modular plant construction

Every package is built against the project datasheet, specification, and area classification so it can drop into the EPC scope without rework.

Engineering Drawings EPC Teams Can Review

Bid-stage drawing packages usually begin with enough detail for EPC layout, tie-in, access, lifting, weight, utilities, and interface review. After award, the drawing set can move through approval, IFC, and as-built stages as the project scope is finalized.

General Arrangement Drawings

Dolphin can provide project General Arrangement (GA) drawings for centrifuge packages. Each GA typically shows the plan view, side elevation, and end elevation with all critical dimensions, nozzle locations, service connections, weight, and center-of-gravity data.

GA drawings are prepared in AutoCAD and issued as native DWG and PDF. They include overall envelope dimensions, nozzle sizes, flange ratings, bolt patterns, anchor bolt layouts, and load data needed for civil and structural engineering.

GA drawings help the EPC team confirm skid footprint, nozzle or tie-point orientation, maintenance clearances, lifting considerations, access points, and approximate weights. They also give project engineers a fast way to see what belongs inside Dolphin's skid limits and what remains by others.

P&ID Drawings

Dolphin can provide Process and Instrumentation Diagrams (P&IDs) for the centrifuge package scope. Each P&ID typically shows process lines, instrument locations, control valves, relief devices, and tie-in points at the package battery limit.

P&IDs follow ISA symbology and are drawn in AutoCAD format. They are issued for EPC review, marked up during detail engineering, and reissued at IFC and as-built stages.

For a two-stage package, the P&ID can show the decanter stage, disc stack polishing stage, sludge handling, oil discharge, and off-skid tie points.

Document Control: SDRL and VDRL Support

Depending on scope, Dolphin can respond to Supplier Document Requirements Lists (SDRL) and Vendor Document Requirements Lists (VDRL) with the deliverables expected for a centrifuge system package.

Typical SDRL deliverables include GA drawings, P&IDs, datasheets, electrical schematics, instrument lists, control narratives, bill of materials, material certificates, test reports, and operating manuals.

SDRL Management

Dolphin can support formal SDRL workflows when required by the EPC package. The SDRL typically lists every deliverable document, the required approval code, the submission milestone, and the return cycle.

VDRL Tracking

Some EPC contractors issue the document register as a Vendor Document Requirements List instead of an SDRL. Dolphin is familiar with both formats and can work with the contractor's standard template.

The VDRL is tracked through every revision, returned comment, and final approval step. Dolphin responds to review comments within the agreed turnaround period and re-issues updated documents until final IFC approval.

EPC Document Lifecycle

• Bid-stage package: Preliminary GA, P&ID, datasheets, scope notes, clarification register, and major equipment list.
• Post-award submittals: Approval drawings, updated datasheets, controls documents, ITP, FAT procedure, and vendor data updates.
• Turnover records: FAT report, inspection records, certificates, O&M manual, spare parts list, and final manufacturer record book (MRB).

Inspection Plans, FAT, and Project Closeout

ITP and QAP Alignment

EPC centrifuge packages typically include an Inspection and Test Plan (ITP). The ITP lists each manufacturing and testing step, the acceptance criteria, and the inspection level: review point, witness point, or hold point.

The ITP is submitted with the Quality Assurance Plan (QAP) and covers incoming material verification, dimensional inspection, welding inspection, hydrostatic testing, electrical testing, and the Factory Acceptance Test.

For projects that require formal inspection control, Dolphin can support a project-specific QAP aligned to the centrifuge package scope. The goal is to make inspection expectations clear before fabrication and testing begin.

Factory Acceptance Test (FAT)

Dolphin conducts Factory Acceptance Tests at its Warren, Michigan facility. The FAT is performed against the approved test procedure and can be witnessed by the EPC inspector or client representative when specified.

A typical FAT includes visual and dimensional inspection, electrical and I/O verification, vibration check, PLC/HMI functional test, and wet run where specified. All test results, punch lists, and sign-off sheets are documented and submitted with the shipment.

Site Acceptance Test (SAT)

Site Acceptance Testing can include a repeat of FAT checks, field I/O verification, and performance testing under process conditions. Dolphin provides commissioning support and field supervision as required.

Controls, Interfaces, and Hazardous-Area Requirements

PLC and HMI Controls

Centrifuge packages typically include a PLC-based control panel with HMI for local operation and monitoring. The control system can handle start/stop sequencing, speed control, temperature and vibration monitoring, interlock logic, and alarm management.

Dolphin provides the control narrative, I/O list, cause-and-effect matrix, and network architecture drawing for EPC review. Communication protocols such as Modbus TCP, Profinet, EtherNet/IP, or hardwired signals are configured to match the plant DCS or SCADA interface.

Hazardous-Area Classification

US projects may specify UL/NRTL-listed equipment with a Class I Division 1 or Class I Division 2 design basis. Europe and many international projects may specify ATEX Zone 1 or Zone 2 equipment. Worldwide EPC packages may specify IECEx or IEC 60079 series as the design basis.

The design basis includes the gas group, temperature class, Ex protection method, and IS instrument barriers where specified by the project.

Final electrical classification is confirmed from the EPC RFQ, area classification drawing, datasheet, and project specification.

Representative Global Project Experience

Dolphin has delivered centrifuge systems for EPC projects across the oil and gas, petrochemical, defense, industrial, and marine sectors. The following cards represent the range of project geography and application scope.

Send Us Your EPC Bid Package

Dolphin accepts RFQs for centrifuge packages from EPC contractors, engineering firms, procurement agents, and plant owners. Share the RFQ, datasheet, process requirements, hazardous-area basis, or SDRL/VDRL, and Dolphin will respond with a centrifuge package scope that EPC teams can review.

To request a quotation, provide the following where available

• Equipment datasheet or process specification
• P&ID or process flow diagram (PFD)
• Area classification drawing or hazardous-area specification
• SDRL or VDRL template
• Delivery schedule and shipping destination
• Any client-specific inspection or testing requirements

Dolphin will review the inquiry, clarify technical and commercial points, and return a formal quotation with scope, schedule, and pricing.

Please contact Dolphin Centrifuge or call us at (248) 522-2573 to discuss your EPC centrifuge package requirements with our engineers.