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Natural Gas Infrastructure

Natural Gas Infrastructure Services

Modern natural gas infrastructure—ranging from high-pressure transmission mains to neighborhood service lines, along with every regulator station in between—serves as the silent backbone that heats homes, powers industries, and balances the electric grid. It includes welded steel or polyethylene natural gas pipeline segments, pressure-reducing stations, valves, smart meters, and cathodic corrosion protection systems that preserve steel for decades. In 2023, The Pipeline and Hazardous Materials Safety Administration (PHMSA) logged 412,025 miles of transmission and 2.35 million miles of distribution pipe, making gas the nation’s most extensive underground utility system (PHMSA, 2025).

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Natural Gas Pipeline Construction and Integrity Management

We deliver end-to-end solutions for natural gas pipeline systems, spanning transmission and distribution networks. From initial planning through long-term integrity maintenance, and with a strong emphasis on safety, compliance, and operational reliability, our team supports every phase of the project lifecycle. In construction, we perform civil works such as building access roads, mass excavation, joint trench, and horizontal directional drilling. We also install new steel and HDPE mains, regulators, and compressor stations. Beyond construction, we provide robust integrity management programs that emphasize safety and de-risk compliance. These include hydrostatic and pneumatic pressure testing, inspections, cathodic corrosion protection systems, and digital integrity monitoring.

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Underground Drilling and HDD Capabilities

When right-of-way is constrained, or surface disruption must be minimal, our underground directional drilling specialists install steel pipes safely beneath rivers, highways, or rail corridors. Centuri has a national fleet of maxi‑rigs and service drills for underground directional drilling and horizontal directional drilling (HDD). While our equipment drills beneath rivers and through solid rock, we deploy reclaim systems that recycle drilling fluids, saving on costs. This trenchless expertise reduces restoration bills, speeds timelines, and preserves sensitive environments.

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High-Quality Fabrication and High-Pressure Steel Services

Our in-house fabrication services enable you to build according to specifications while saving both time and costs. Centuri fabrication facilities handle carbon, stainless, and chrome steel up to 48 inches in diameter and utilize automated and manual welding systems that are compliant with ASME and API codes. Hydrostatic testing, X‑ray services, and NACE‑certified coatings ensure durability and integrity for your natural gas pipelines.

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Joint Trench and Duraline Electrical Integration

Where municipalities demand efficient corridor use, we excel at joint trench installations – nestling gas, duraline electrical, water, and fiber in a single excavated slot with coded separation and shared backfill. This coordinated approach cuts pavement restoration work and speeds up project schedules. Crews have expertise in deep/mass excavation, vault construction, and duraline electrical solutions that compartmentalize power conductors.

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Regulator and Compressor Stations

Precise pressure control protects customers and reduces fugitive methane. Our regulator station installations reliably balance line pressure, while strategically located compressor units keep volumes moving over long distances. Centuri crews perform civil, mechanical, electrical, and commissioning scopes for new greenfield compressor sites and brownfield station upgrades, including installation of centrifugal or reciprocating packages, slug catchers, and high‑velocity flushing.

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Future-Ready Innovation: Integration and Sustainability

With regulators targeting a reduction of 1.2 million metric tons of methane emissions by 2035 (EPA, 2024), Centuri is embracing sustainability. We deployed the GoVAC Pipeline Evacuation System, eliminating the venting or flaring of excess gas into the atmosphere. Our modular construction shortens field hours while fleet telematics lowers our carbon footprint. Additionally, we utilize SCADA to monitor gas networks, ensuring quick leak fixes, safety, and regulatory compliance. Lastly, we have partnered with customers on renewable natural gas projects – anaerobic digesters and injection sites, positioning networks for a lower-carbon future.

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Ensuring Safety and Compliance in Gas Networks

Safety starts long before the first weld. Centuri engineers design to CFR 192 standards, conduct extensive hydrostatic pressure testing, and follow API RP1173 pipeline safety protocols. Construction is backed by a digitized quality assurance platform that captures every weld number, radiograph, and pressure test. In operation, SCADA telemetry streams flow, temperature and acoustic leak signatures to control centers, enabling continuous visibility and remote control. Our cathodic corrosion protection systems extend steel life by decades and fulfill compliance requirements (PHMSA, 2017) for your gas networks.

Why Choose Centuri?

  • Experience: 115-year operating history with utility partnerships averaging 24 years.
  • Safety: A Total Recordable Incident Rate (TRIR) of 1.05 and operator-qualified crews.
  • Resources: In-house horizontal directional drilling rigs and pipeline fabrication services. Plus, 51 gas locations across 46 U.S. states and four Canadian provinces, slashing mobilization time.
  • Quality: ISO 9001 workflows, API-certified welders, and cloud QA/QC documentation visible in real-time.
  • Community Impact. Local hiring, reduced emissions, traffic-control coordination, spoil recycling, and habitat restoration on every project.

Start Your Natural Gas Infrastructure Project with Centuri

Whether you’re building a new distribution line, expanding takeaway capacity, or replacing aging cast-iron mains, Centuri is ready. Contact us for a no-obligation consultation, and let’s build natural gas infrastructure that’s safer, smarter, and prepared for a lower-carbon future.

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FAQs

What types of natural gas infrastructure projects does Centuri handle?

We handle everything from high-pressure transmission loops and distribution mains to meter relocations, bridge pipeline rehab, regulator station upgrades, and emergency storm restoration.

How does Centuri ensure pipeline safety and regulatory compliance?

Rigorous CFR 192 design, certified welders, extensive hydrostatic pressure testing, adhering to API RP1173 pipeline safety protocols, real-time SCADA monitoring, and documented quality management systems.

What is cathodic corrosion protection, and why is it important?

Cathodic protection applies an external electric current to the pipe, preventing metal loss and doubling or tripling asset life compared with unprotected steel​.

Can Centuri manage joint trench projects with multiple utilities?

Yes. We coordinate gas, water, telecom, and duraline electrical conduits in a single trench, reducing cost and surface disruption.

How does Centuri incorporate sustainability into natural gas infrastructure?

By adopting risk mitigation plans to avoid environmental and animal habitat degradation. One example is the use of the GoVAC Pipeline Evacuation System, which eliminates the flaring or venting of excess gas into the atmosphere. Also, we enable renewable gas tie-ins and offer camera-guided leak surveys and repairs to clients. Internally, we use fleet telematics and track waste to reduce our carbon footprint.

Citations
Pipeline and Hazardous Materials Safety Administration (PHMSA) (2025, April 7). Annual Report Mileage for Gas Distribution Systems. https://www.phmsa.dot.gov/data-and-statistics/pipeline/annual-report-mileage-gas-distribution-systems

Pipeline and Hazardous Materials Safety Administration (PHMSA) (2017, October 24). Fact Sheet: Cathodic Protection. https://primis.phmsa.dot.gov/comm/FactSheets/FSCathodicProtection.htm

U.S. Environmental Protection Agency (EPA) (2024, November 12). Finalizes Rule to Reduce Wasteful Methane Emissions and Drive Innovation in the Oil and Gas Sector. https://www.epa.gov/newsreleases/epa-finalizes-rule-reduce-wasteful-methane-emissions-and-drive-innovation-oil-and-gas