About Tim: In my role at Chevron’s Salt Lake Refinery, I work as a Piping Designer, responsible for creating designs for piping systems within the facility. I develop plans and drawings that are crucial for the installation and layout of piping systems that transport air, gas, liquids, and steam throughout the structure.
I find immense fulfillment in my work, engaging with talented professionals on a daily basis. I take on new design projects and actively participate in the construction process when implementing these piping systems. Working for a company like Chevron, which prioritizes employee well-being, brings me great joy.
Inside the Piping Designer’s Playbook
By Tim Ivory, Designer, Piping/Mechanical at Chevron Salt Lake Refinery
Refinery maintenance shutdowns are high-stakes operations that demand precision, planning, and coordination. As a Piping/Mechanical Designer, my involvement begins well before the shutdown—typically 1 to 2 years in advance—during the conceptual phase of the new design.
1. Scoping the Design
The process kicks off with collaboration between myself, a design engineer, and unit operators. Together, we define the scope by reviewing operational needs and identifying areas that require new piping or modifications. This early alignment sets the foundation for all future design work.
2. Site Scanning with RTC360
Once the scope is defined, I head to the field with a Leica RTC360 laser scanner to capture the existing conditions. Depending on the complexity, multiple scan stations may be required. Back at my desk, I process the scan data—usually within 1–2 hours. The resulting point cloud provides a highly accurate digital representation of the site, essential for precise modeling.
3. 3D Modeling the Design
Using the scan data, I begin building the 3D model:
- Identifying tie-in points for new piping.
- Locating existing steel structures for support and adding new supports if needed.
- Integrating equipment relevant to the scope.
Modeling time varies but can take up to 32–40 hours, depending on complexity. This digital twin helps eliminate guesswork and reduces costly field errors.
4. Updating P&IDs
In parallel, I update Piping and Instrumentation Diagrams (P&IDs). These documents reflect the physical and functional layout of the system and indicate process conditions—liquid, gas, water, or air. Accurate P&IDs are vital for safety and operational clarity.
5. Model Review and Design Validation
Once the model is complete, I prepare it in Navisworks for a design review. Mechanical, process, and operations teams evaluate it for clashes, constructability, and alignment with process goals. A second piping designer performs a detailed check to ensure:
- Compliance with piping specifications.
- Material accuracy.
- No clashes or interferences.
After validation, the engineering package is finalized and handed off for installation planning.
6. Fabrication and Installation
With approval, isometric drawings are created, materials are ordered, and fabricators build the components. Installation takes place during the shutdown, ensuring minimal disruption and maximum efficiency.
Having an in-house piping designer streamlines coordination, improves accuracy, and reduces reliance on EPC firms—saving time and potentially millions in engineering costs. It’s a strategic investment that pays off in quality and execution.