A leading oil & gas operator managing critical rotating equipment across multiple processing facilities sought comprehensive engineering support for its gas sealing systems. The engagement covered the complete engineering lifecycle, from process definition and P&ID development to 3D modeling, fabrication detailing, and field instrumentation wiring. The objective was to enhance system reliability while ensuring uninterrupted plant operations and adherence to project schedules.

The scope included:

• Process & Instrumentation Diagram (P&ID) development for the sealing system
• 3D General Arrangement (GA) modeling of equipment, piping and structural steel
• 2D General Arrangement Drawings (GAD) with multi-view layouts and equipment schedules
• Isometric spool fabrication drawings with weld and material call-outs
• Instrument Wiring Diagrams (IWD) and loop wiring schedules

Challenge:

Process-to-Fabrication Continuity

• Maintaining design consistency from process schematic through to shop-floor fabrication drawings
• Coordinating multiple drawing disciplines (piping, structural, instrumentation) on a single connected model

Rotating Equipment Sealing Precision

• Ensuring gas sealing system design met tight tolerance and reliability requirements for continuous operation
• Managing interface complexity between sealing systems and adjacent piping/structural components

Fabrication Readiness

• Producing spool drawings detailed enough for direct shop fabrication with minimal RFIs
• Coordinating cut lengths, weld details and material specifications across multiple spool packages

Sustained Delivery at Scale

• Supporting an ongoing, high-volume detailing workload with a large onsite team
• Maintaining drawing quality and turnaround consistency across a Time & Material engagement

ALTEN Solutions

Integrated Design-to-Detail Workflow

• Built a connected pipeline from P&ID through 3D GA modeling to spool fabrication drawings, reducing rework and version mismatches
• Maintained a single source-of-truth model across piping, structural and instrumentation disciplines

Multi-View Documentation Standard

• Delivered GAD packages with consistent front/left/right/top view conventions and equipment schedules for easy client review

Fabrication-Ready Detailing

• Developed isometric spool drawings with complete weld details, cut lengths and material call-outs to shop-fabrication standard

Field-Ready Wiring Documentation

• Produced Instrument Wiring Diagrams and wiring schedules aligned to the final instrumentation layout for seamless field installation

Scalable Onsite Team Model

• Deployed a 24-engineer onsite team structured for continuous, ongoing delivery under a T&M engagement model

Business Benefits

Design Accuracy

• Reduced fabrication errors through fully coordinated P&ID-to-spool documentation

Faster Fabrication Turnaround

• Shop-ready spool drawings minimized clarification cycles with fabrication teams

Operational Continuity

• Onsite delivery model ensured minimal disruption to ongoing plant activities

Flexible Engagement

• T&M model allowed the client to scale engineering support to evolving project needs

Tools, Technologies & Expertise

Engineering & Design Tools

• 3D modeling & GA design tools
• Isometric spool drawing software
• Instrument wiring diagram / loop documentation tools

Engineering Capabilities

• Piping and rotating equipment engineering
• Process & instrumentation detailing
• Fabrication documentation

Domain Expertise

• Gas sealing systems
• Rotating equipment interfaces
• Process piping detailing

Where ALTEN Adds Value

• Delivering full process-to-fabrication continuity under one engineering team
• Sustaining high-volume, ongoing detailing workloads without quality drop-off
• Reducing fabrication-stage rework through disciplined multi-view documentation

Why ALTEN
ALTEN combines onsite engineering presence, cross-disciplinary detailing expertise, and fabrication-ready documentation standards to keep critical rotating equipment projects moving — accurately, continuously, and at scale.