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Trusted Construction Solutions for Oil & Gas Projects
St Clair Mechanical has built a reputation for excellence in the construction industry over decades. Founded with a focus on piping structural contracting, we have expanded to deliver comprehensive Mechanical, Civil, Electrical, and Pipeline services for mid- to large-scale projects. Our team combines over 40 years of collective experience with a commitment to safety, quality, and teamwork, serving top-tier clients in the oil and gas, petrochemical, and renewable energy sectors. With state-of-the-art facilities and equipment, including a 30,000 sq. ft. fabrication shop and a fleet of advanced machinery, we ensure precision and efficiency in every project. Our mandate to prioritize repeat business and referrals drives our dedication to client satisfaction, supported by a safety-first culture and rigorous quality control standards.

Our personnel hold certifications such as CWB I/II, TSSA GPI, and API 1169, ensuring compliance with industry-leading practices. We specialize in modular skids, pipeline construction, electrical systems, and environmental remediation, offering end-to-end solutions from design to project completion. Our partnerships with the Sarnia Lambton Industrial Education Cooperative underscore our commitment to ongoing safety training and workforce development. With a focus on minimizing environmental impact and maintaining a zero-incident work environment, we strive to exceed client expectations while fostering sustainable growth.
Services
Mechanical Construction Civil Construction Electrical Services Pipeline Construction Modular Skids Shutdown Support Commissioning Environmental Remediation Fabrication Pipeline Integrity Digs
Highlights and features
  • We offer 40+ years of experience in industrial construction and piping.
  • Our safety-first culture is supported by dedicated training partnerships.
  • We maintain CWB, API, and TSSA-certified quality control standards.
  • Our fleet includes 25 welding rigs and 6,000 steel access mats for efficiency.
  • We provide end-to-end project management from design to commissioning.
Associations and certifications
  • CWB I
  • CWB II
  • TSSA GPI
  • API 1169
  • CWB Welding Supervisor
Services
Mechanical Construction
Our mechanical construction division specializes in custom piping and equipment module fabrication using carbon steel, stainless steel, and alloys. With 32,500 sq. ft. of shop space and 200+ registered weld procedures, we ensure ASME-compliant precision. Our services include compressor station piping, power plant systems, and refinery equipment installation, supported by cranes with 250-ton capacity.
Pipeline Construction
We deliver full-cycle pipeline construction for oil and gas clients, including installation, integrity digs, and hydrostatic testing. Our 6,000 steel access mats and 25 welding rigs enable efficient field operations. Certified technicians perform API 1169-compliant inspections, while 250-ton cranes and hydrovac trucks ensure safe, precise installations across challenging terrains.
Civil Construction
Our civil division handles excavation, concrete work, and utility installation with 10 excavators and 6,000 matting units. We specialize in foundation preparation for compressor stations, environmental remediation, and steel access matting solutions. Symon forms inventory supports large-scale concrete pours, while 25-ton payloaders optimize material handling efficiency.
Electrical Services
We design and install high-voltage electrical systems and fiber optic networks for refineries and industrial facilities. Our 10 certified electricians handle panel fabrication, heat trace systems, and hazardous area classifications. Fiber optic testing equipment and 35 years of industry experience ensure reliable power distribution and communication infrastructure.
Modular Skids
Our modular skid fabrication leverages 30,000 sq. ft. of shop space to create pump stations, electrical units, and processing systems. Advanced CAD software ensures dimensional accuracy, while 15-ton crane capacity facilitates assembly of multi-level modules. This approach reduces field labor costs by 40% and accelerates project timelines through parallel construction phases.
Questions
What industries does St. Clair Mechanical serve?
We specialize in oil and gas, petrochemical, renewable energy, and industrial infrastructure projects.
What safety certifications does your team hold?
Our quality control team maintains CWB I/II, API 1169, and TSSA GPI certifications.
Can you handle large-scale pipeline projects?
Yes, with 25 welding rigs, 6,000 access mats, and 250-ton cranes for major installations.
Do you offer modular construction solutions?
Our 30,000 sq. ft. shop fabricates custom skids for pump stations and processing systems.
What environmental protections do you implement?
We use erosion controls, perform environmental remediation, and exceed regulatory standards.
How do you ensure project quality?
Through API-certified inspections, documented weld procedures, and daily safety briefings.