The U.S. Energy Information Administration (EIA) reported that refinery processing capacity fell to 18.2 million barrels per calendar day in January 2026, a decline of about 1 percent from the prior year. As such, many oil and gas operators are now focused on optimizing the performance of their existing facilities.

However, several factors can hinder this effort, including aging equipment, poor layout design, limited pipe space, and costly shutdowns.

Therefore, how do operators maximize their investment in their current infrastructure while minimizing cost and risk?

Advanced plant engineering services offer one potential answer.

Why is Plant Engineering So Crucial for Oil and Gas Facilities?

When a refinery decides to increase its throughput by installing a new pump, it appears to be a relatively simple task. However, increasing the flow rate through the pump will likely result in increased pressure loss in downstream pipes, increased load on control valves and equipment, and potentially even increased stress on structural components.

Without conducting an appropriate engineering assessment prior to installation, a seemingly minor equipment replacement could result in significant unanticipated modifications throughout the rest of the facility.

This is just one example of the many interdependencies inherent in oil and gas engineering. All major systems within a processing facility interact with each other, and any change made to one system can impact multiple other systems. Consequently, effective plant engineering services enable operators to identify and address these interdependencies at an early stage. Engineers perform various assessments, including process calculations, equipment layout, piping design, and structural analysis, to evaluate how proposed changes will impact the overall operation of the facility.

Ultimately, the objective of plant engineering is to enhance performance while maintaining reasonable construction costs, minimal disruption to operations, and acceptable levels of risk.

1. Increasing Efficiency and Removing Limitations Using Process Engineering Services

A processing facility may possess sufficient installed capacity to meet its desired throughput; however, it may still fail to achieve its intended throughput due to a variety of reasons, including inadequate piping size, excessive pressure drop, or inefficient heat exchangers. Prior to replacing equipment, engineers must first determine exactly what is limiting performance.

Teams utilizing process engineering services can analyze operating parameters, evaluate equipment capacities, and identify areas for improvement. For example, a refinery seeking to increase production may need to conduct studies involving:

• Hydraulic performance: Will existing piping be able to support higher flow rates without excessive pressure losses?
• Heat transfer efficiency: Does the heat exchanger have adequate capacity for new operating conditions?
• Pump performance: Can pumps operate reliably at proposed flow rates?
• Equipment limitations: Can vessels and separators handle changes in process conditions?
• Safety requirements: Are relief systems and operating safeguards still adequate?

Using process simulation and engineering calculations allows operators to compare alternative options before implementing physical changes. At times, simply modifying piping configurations or replacing a single piece of equipment may suffice. Other times, however, a much larger modification may be needed. Regardless, it is imperative that operators identify the true limitation(s) prior to investing resources into a solution.

2. Properly Planning Facility Layout Prior to Beginning Construction

Poorly planned facility layouts can lead to long-term issues. A compressor located in a congested area may prove difficult to maintain. A lengthy piping path can increase material costs and pressure losses. Restricted access around equipment can impede inspection and repair efforts. These types of issues typically arise during the initial planning phase.

Plant layout engineering enables operators to utilize available space efficiently while taking into consideration process flow, equipment accessibility, safety concerns, and construction requirements. When building a new oil and gas facility, engineers have greater flexibility regarding where to place equipment and plan utility routes. On the other hand, when working with an existing facility, engineers face additional challenges since new systems must be integrated into existing infrastructure.

For example, consider adding a heat exchanger to an existing processing unit. Positioning the heat exchanger near the equipment it connects to would minimize piping lengths. However, placing it too close to the equipment could limit maintenance personnel's ability to access the equipment and/or restrict space needed for removing the tube bundles.

Therefore, an effective layout must balance both installation needs and maintenance requirements. This highlights why successful oil and gas plant design necessitates close collaboration between process, mechanical, piping, civil, and structural engineering disciplines.

3. Identifying Potential Problems Before They Occur With 3D Plant Modeling

Imagine finding out that a newly designed pipeline conflicts with an existing structural member once fabrication has commenced. Resolving this conflict may involve altering piping spools, support configurations, or sequencing of installations. Each alteration increases cost and delays construction. 3D plant design and modeling provides engineering teams with the opportunity to detect these types of conflicts prior to reaching the job site.

By creating collaborative digital models, engineers can visualize how all aspects of a facility – including equipment arrangements, piping networks, structural systems, etc. – fit together within a common environment. Visualization facilitates detection of:

• Interferences between piping, structural members, and equipment
• Insufficient maintenance/operator access
• Congested valve/instrumentation areas
• Poorly positioned pipe supports
• Constraints related to construction/installation

Additionally, 3D laser scanning can be employed to create point cloud representations of current site conditions for brownfield facilities. Point cloud data can assist engineers in developing accurate models representing the actual physical plant, especially when original drawings no longer accurately depict the site.

Although these models must undergo engineering validation prior to being utilized for design purposes, combining 3D plant design with early interdisciplinary review processes can decrease unnecessary rework and promote improved communication among engineering, fabrication, and construction teams.

4. Enhancing Piping Reliability Through Design and Stress Analysis

Piping systems represent one of the largest and most critical components of oil and gas processing facilities. Piping systems must endure varying pressures, temperatures, and dynamic forces over their service lives. Even though piping systems may appear adequately supported, they can experience failures due to changing operating temperatures.

For example, thermal expansion occurring in high-temperature process lines can generate excessive forces at equipment nozzles or pipe supports. Piping stress analysis services allow engineers to evaluate these conditions and assess whether a given configuration is viable. Typical evaluations conducted during piping stress analyses include:

• Thermal expansion/contraction
• Sustained loads caused by pipe weight/pressure
• Loads exerted upon equipment nozzles
• Reactions/displacements experienced by supports
• Occasional loads (e.g., wind/seismic)

Based upon results obtained from these evaluations, engineers can recommend modifications to piping routings/flexibility/support locations/restraint arrangements. Furthermore, piping design services must also address maintenance access/drainage/venting/location of valves/instruments. Ensuring these details are correctly addressed contributes significantly towards enhancing piping reliability and reduces the likelihood of costly modifications being required after installation.

5. Modernizing Brownfield Facilities Without Unnecessary Shutdowns

Modernizing an operating oil and gas facility presents unique challenges. Space availability is limited. Drawings may not accurately represent current site conditions. New equipment must interface with existing systems, and construction activities must occur adjacent to active infrastructure. In some instances, installation can only occur during scheduled shutdown periods.

Thus, designing modifications for brownfield facilities presents considerable challenges. Consider a facility looking to expand capacity by adding a new processing skid. Engineering work extends beyond merely designing the skid. The engineering team must also determine how the new equipment will interface with existing process lines/utilities/electrical systems/supporting structures. Generally speaking, a well-executed plant revamp consists of five primary phases:

1. Reviewing existing conditions: Verifying drawings/equipment information/site measurements

2. Determining tie-in requirements: Establishing points of connection for new systems to existing infrastructure

3. Evaluating structural capacity: Assessing whether existing foundations/supports can sustain additional loads

4. Planning construction activities: Identifying opportunities for prefabrication/access requirements/shutdown-dependent tasks

5. Coordinating engineering changes: Updating drawings/models/documentation/applicable management-of-change requirements

One effective method for accomplishing this goal is to complete as much prefabrication/preparation as feasible prior to initiating the shutdown period. For instance, prefabricated piping spools/modular equipment skids can minimize work performed on-site; however, dimensional/interfaces must be confirmed prior to commencement. Good brownfield plant engineering/design services enable operators to plan these changes prior to the start of the shutdown period.

6. Ensuring Existing Structures Can Support Additional Equipment

Installing new equipment generally introduces new loading requirements for existing plant structures. Examples include increased dead loads, operating loads, vibrations, and/or thermal forces. If existing structures were constructed decades ago, their original capacity/current condition warrants thorough evaluation. Plant structural engineering assists in determining whether existing foundations/steel structures/equipment supports possess sufficient capacity/strength to support proposed modifications.

Examples include evaluating whether supporting beams/columns can support a heavier compressor. Structural evaluations also include assessing dynamic loads/vibration effects/foundation adequacy/connection details/anchoring arrangements/potential strengthening requirements. Structural modifications also need to be coordinated with piping/equipment design. Conducting evaluations early can eliminate last-minute strengthening efforts/construction delays.

7. Connecting Engineering Decisions to Long-Term Operational Costs

Engineering solutions may initially appear cost-effective; however, they may ultimately result in increased maintenance costs over time. For example, tightly packing equipment may reduce the total land area occupied; however, if maintenance personnel cannot easily access pumps/valves, future repairs may become increasingly expensive. Similarly, choosing a shorter piping route without adequate flexibility may lead to reliability issues.

Consequently, plant design engineering should consider the entire lifecycle of a facility. Operators should evaluate how engineering decisions influence:

• Energy consumption/process efficiency
• Inspection/maintenance requirements
• Equipment reliability
• Construction/modification costs
• Future capacity expansion
• Safe operating conditions

Ultimately, optimal engineering decisions balance short-term project needs with long-term operational costs.

How TAAL Tech Supports Oil & Gas Plant Engineering

Maximizing an oil and gas facility's performance requires more than simply optimizing individual systems. Modifications made to process/piping/equipment/structural systems must all work harmoniously. At TAAL Tech, we offer comprehensive multi-disciplinary plant engineering services to assist oil/gas operators/EPCs/engineering teams in addressing these needs.

Our engineering expertise includes process engineering/piping design/piping stress analysis/plant layout development/3D plant design/modeling/structural engineering/brownfield modifications. We assist engineering teams in developing coordinated designs/evaluating modifications/preparing technical documentation for construction/implementations. Whether the project involves constructing a new processing facility/upgrading existing equipment/modernizing an existing facility, our primary objective is providing practical engineering solutions that account for site conditions/constructability/operational requirements.

Planning an oil and gas facility upgrade/expansion?

Contact TAAL Tech today to learn how we can support your next project.