NDT Inspection Services in Ontario

In brief: Atlantis NDT carries out non-destructive testing for refineries, chemical plants, steel mills, power stations, manufacturers, pipelines and fabricators across Ontario, from Sarnia's Chemical Valley and the Lake Erie shore to the Golden Horseshoe, the nuclear coast of Lake Huron and Lake Ontario, and the mining and mill towns of the north. Services cover UT thickness and corrosion mapping, PAUT and TOFD, magnetic particle, penetrant, visual, eddy current and IRIS, PMI and hardness, MFL tank floor scanning and pulsed eddy current, with radiography through licensed arrangements confirmed per job. Work runs on procedures approved by an ASNT NDT Level III and ends in a code-referenced digital report. Atlantis is Houston-based and has no office in Ontario; crews are mobilised to your site.

Ontario's inspection market is shaped by a different mix from the oil provinces. The province has refining and petrochemicals, but it also has a large nuclear fleet, integrated steelmaking, an automotive industry now adding battery plants, hydroelectric and gas-fired generation, mines, smelters and pulp mills, and a fabrication sector that ships across the US border every day. Boilers and pressure vessels are regulated by the Technical Standards and Safety Authority (TSSA), pipelines by TSSA or the Canada Energy Regulator depending on where they run, and nuclear plants and radiography sources by the Canadian Nuclear Safety Commission. This page sets out where the work is, which methods and rules apply, and how we scope it. Ready now? Send us your Ontario inspection request.

Where inspection work is in Ontario

Direct answer: Ontario inspection demand concentrates in Sarnia and the St. Clair River corridor; Nanticoke and the Lake Erie shore; Hamilton, Toronto and the Golden Horseshoe; the nuclear sites at Bruce, Darlington and Pickering; the manufacturing belt from Windsor to Oshawa; and northern Ontario's mining, smelting, steel and pulp and paper centres.

Sarnia, Corunna and the St. Clair River

Sarnia's Chemical Valley is the province's densest cluster of process equipment. Imperial's Sarnia refinery and chemical plant, Suncor's Sarnia refinery and Shell's refinery at Corunna sit alongside NOVA Chemicals' ethylene and polyethylene operations, synthetic rubber and specialty chemical plants, and CF Industries' nitrogen complex downriver at Courtright. Enbridge's Line 5 crosses the St. Clair River into Sarnia, and Enbridge Gas's Dawn storage hub lies to the east. Turnaround scopes here are classic refinery and petrochemical NDE: CML thickness surveys on process piping, PAUT and TOFD on reactor and separator welds, WFMT inside amine, caustic and ammonia vessels, IRIS and eddy current on exchanger bundles, and API 653 tank work. Background: NDT consulting in Sarnia, NDT training in Sarnia and a digital twin for Sarnia assets.

Nanticoke and the Lake Erie shore

In Haldimand County, Imperial's Nanticoke refinery operates beside Stelco's Lake Erie Works, an integrated steel mill. The refinery follows the same piping, vessel and tank logic as Sarnia; the steel mill adds blast furnace, steelmaking and rolling equipment, gas mains, cranes and heavy structures where MT, UT and visual inspection run during scheduled repairs. See the Nanticoke digital twin page.

Hamilton, Toronto and the Golden Horseshoe

Hamilton's harbour is lined with steelmaking and steel processing, led by ArcelorMittal Dofasco's Hamilton mill, with Stelco's Hamilton Works and a long chain of processors, fabricators and port terminals. Across the Greater Toronto Area, Mississauga, Oakville, Brampton, Whitby and the surrounding municipalities hold chemical, pharmaceutical, food and packaging plants, aerospace component makers, hospitals and campuses with central steam plants, and a long tail of air receivers, autoclaves and steam equipment on TSSA's periodic inspection cycle. Requests here are often small and frequent: weld inspection on new structural steel and skids, UT on press frames and crane runways, PT on stainless process piping, and boiler and pressure vessel NDE for an insurer's or TSSA inspection. City pages: NDT consulting in Hamilton, ultrasonic testing in Toronto and PAUT inspection in Toronto.

Nuclear: Bruce, Darlington and Pickering

Bruce Power operates the Bruce site on Lake Huron, and Ontario Power Generation operates Darlington and Pickering on Lake Ontario, where it is also building a BWRX-300 small modular reactor at the Darlington site. Refurbishment and component replacement programmes on these CANDU stations generate large inspection volumes, but nuclear pressure-retaining components follow the CSA N285 series under the station's CNSC licence, with the utility's own qualification and quality assurance rules. Independent contractors normally support balance-of-plant, conventional-side and supplier fabrication scopes unless the licensee qualifies them for more. If your scope is nuclear, tell us which programme governs it before we discuss methods. See nuclear plant digital twins and power NDT training in Toronto.

Manufacturing from Windsor to Oshawa

Vehicle assembly plants in Windsor, Oakville, Alliston, Cambridge, Woodstock and Oshawa, and their parts suppliers, depend on welded structures, presses, cranes, dies and conveyors. Battery cell manufacturing in Windsor and the plant under construction at St. Thomas add new structural steel, process piping and utility systems that need inspection during construction and commissioning. Short windows around summer and year-end plant shutdowns are when presses and cranes are available. See Practical NDT in Windsor, Practical NDT in Kitchener and commissioning inspection.

Northern Ontario

Sudbury's nickel and copper mines, smelters and refineries, Algoma Steel at Sault Ste. Marie, gold mines from Timmins to Red Lake, pulp and paper mills, and hydroelectric stations on northern rivers create a steady demand for UT, MT and visual inspection of crushers, mills, kilns, digesters, acid-plant equipment, penstocks and heavy structures. Distances mean scopes are best planned as campaigns covering several sites per mobilisation. See Practical NDT in Sudbury.

NDT methods for Ontario assets

Direct answer: Atlantis performs UT thickness and automated corrosion mapping, PAUT, TOFD, MT including WFMT, PT, VT, eddy current and IRIS, PMI, hardness testing, MFL tank floor scanning, pulsed eddy current and radiography through licensed arrangements confirmed per job. The table ties each to Ontario assets and the reference most often cited. Method choice is confirmed with your inspector during scoping.

Method	Typical Ontario application	Reference usually cited
UT thickness and corrosion mapping	CML surveys in Sarnia and Nanticoke refinery piping; vessel shells; acid-plant and digester walls in the north	Owner programmes built on API 510 and API 570; ASME Section V
PAUT and TOFD	Reactor, separator and repair welds in refinery and petrochemical units; heavy-wall fabrication for export	ASME Section V Article 4; ASME Section VIII; ASME B31.3
Radiography (RT)	Small-bore and socket welds; shop vessels and spools; pipeline girth welds	ASME Section V Article 2; CSA Z662
MT and WFMT	Steel mill cranes, ladles and rolls; amine, caustic and ammonia vessel welds; automotive press frames	ASME Section V Article 7; CSA W59 for structures
PT	Stainless piping in chemical, pharmaceutical and food plants; non-magnetic components	ASME Section V Article 6
Eddy current and IRIS	Exchanger and condenser tubes in Chemical Valley and at power plants	ASME Section V Article 8; owner procedures
VT	External inspection of vessels, piping, tanks and supports; weld visual on structures	ASME Section V Article 9; CSA W59
MFL, PEC and PMI	Tank floors at refinery and terminal tank farms; CUI screening; alloy verification after turnarounds	API 653; owner programmes

All techniques run on written procedures approved by an ASNT NDT Level III. Toronto method pages: ultrasonic, radiographic, magnetic particle, penetrant, visual and eddy current testing, plus TOFD and MFL in Toronto.

API 510, 570 and 653 NDE support in Ontario

Direct answer: Ontario does not list API 510 or API 570 in TSSA's boiler and pressure vessel code adoption; the legal requirement is a current Certificate of Inspection under Ontario Regulation 220/01, based on periodic inspection by TSSA or, for insured equipment, the insurer's inspector, in both cases holding an Ontario Certificate of Competency. Refiners and chemical plants run API programmes on top as engineering practice. Atlantis performs the NDE and data review for the owner's programme. Atlantis is not an API Authorized Inspector or Authorized Inspection Agency, does not supply API-certified inspectors, and never signs as inspector of record.

Vessels and piping. We take UT readings at each CML, examine nozzle and attachment welds with MT or PT during entries, apply PAUT or TOFD where cracking, repairs or service justify it, and record external condition, insulation and supports. Readings sit beside the previous survey so the inspector can calculate corrosion rates. See API 510 pressure vessel inspection support in Ontario and API 570 piping inspection support in Ontario.

Storage tanks. Atmospheric tanks are not pressure vessels, so they sit outside O. Reg. 220/01. Fuel storage falls under TSSA's fuels safety program and environmental rules, and refinery, chemical and terminal owners commonly manage tanks to API 653. We perform floor scanning with UT prove-up, shell thickness, weld examination and settlement readings for the owner's API 653 inspector. See API 653 tank inspection support in Ontario and aboveground storage tank inspection. Atlantis does not provide fitness-for-service or risk-based inspection assessments; those stay with the owner's engineers.

Turnarounds, outages and Ontario's seasons

Direct answer: Sarnia and Nanticoke turnarounds favour spring and autumn, nuclear outages follow each utility's own schedule with long contractor processing, and manufacturers open their equipment during summer and year-end shutdowns. Winter brings cold, snow and lake-effect storms near Lake Huron and Lake Erie. Plan the NDE scope backwards from whichever calendar you work to.

Refinery and petrochemical turnarounds are planned years ahead, with NDE scopes frozen months before the start date, and Chemical Valley sites can overlap, which tightens the supply of experienced technicians. Nuclear work starts long before the outage, with security clearance, training and qualification requirements set by the licensee. In winter, outdoor tank and pipeline work needs cold-weather couplant, heated enclosures for some techniques and procedures qualified for the actual temperature, especially for penetrant testing. Our advice is to move on-stream surveys, external visual and many weld examinations into the warmer months ahead of an outage, so the outage carries only work that needs isolation or entry. See turnaround and shutdown inspection, or plan an Ontario turnaround or outage scope.

Ontario regulations and codes that shape inspection

Direct answer: TSSA administers boiler and pressure vessel safety under the Technical Standards and Safety Act, 2000 and O. Reg. 220/01, and oil and gas pipeline systems inside Ontario under O. Reg. 210/01; the Canada Energy Regulator covers interprovincial and international pipelines; the Canadian Nuclear Safety Commission licenses nuclear plants and radiography sources; and X-ray equipment in workplaces falls under Regulation 861 under the Occupational Health and Safety Act.

TSSA: boilers, pressure vessels and pressure piping

TSSA's boilers and pressure vessels program registers designs, adopts CSA B51 and the ASME codes it references through a code adoption document, issues Certificates of Authorization to firms that install, repair or alter pressure equipment, accredits owner-user self-inspection programs, and requires a current Certificate of Inspection for regulated equipment. NDE on repairs and alterations follows the construction or repair code. Background: TSSA compliance, examination records and personnel certification records.

Pipelines: TSSA and the Canada Energy Regulator

Oil and gas pipelines wholly within Ontario fall under TSSA's O. Reg. 210/01, which works from CSA Z662. Interprovincial and international lines, including Enbridge's Line 5 and Line 9 and TC Energy's Canadian Mainline, are regulated by the Canada Energy Regulator, whose Onshore Pipeline Regulations require CSA Z662, radiographic or ultrasonic examination of the full circumference of each weld joint, and an integrity management programme. See pipeline inspection services.

Nuclear and radiography: the CNSC

The Canadian Nuclear Safety Commission licenses Ontario's nuclear power plants and the nuclear substances used in gamma radiography. Exposure devices must be operated by CNSC-certified exposure device operators or by trainees under their direct supervision, and X-ray equipment at Ontario workplaces is covered by Regulation 861. Atlantis does not claim to hold a CNSC licence; the licensed radiography arrangements for each Ontario job are confirmed at quotation, and PAUT or TOFD can replace radiography where the code and owner accept it.

Personnel certification on Ontario jobs

Direct answer: Many Ontario owners, CSA codes and CSA W59 projects require NDT personnel certified to CAN/CGSB-48.9712 (ISO 9712), issued by Natural Resources Canada's NDT Certification Body and, for some methods, CWB Group. Nuclear work adds the licensee's own qualification rules, and export work for US customers often asks for ASNT SNT-TC-1A. Atlantis's programme is SNT-TC-1A employer certification under an ASNT NDT Level III. The scheme your job requires is confirmed at quotation.

Ontario has more dual-scheme work than most provinces because so much of its output crosses the border: a shop can build to CSA B51 for an Ontario owner and to a US specification for a Michigan or Ohio customer in the same month. The Canadian General Standards Board closed on 1 April 2026, and Natural Resources Canada has stated that CAN/CGSB-48.9712 remains valid and certification continues without interruption. If a method on your scope requires CGSB certification, we confirm whether the assigned technicians meet it, or tell you which part we cannot staff. Atlantis does not train, examine or certify personnel to CAN/CGSB-48.9712 or ISO 9712. For SNT-TC-1A programmes, see NDT training in Ontario and Level III consulting in Ontario.

Inspection reports for Ontario owners and inspectors

Direct answer: Each job ends with a digital report reviewed under ASNT Level III oversight. Readings, indications and photographs are tied to the asset, CML or weld, procedure, acceptance criterion, technician certification and instrument calibration, so a TSSA inspector, an insurer's inspector or the owner's API inspector can follow it without calling the technician.

Reports quote the acceptance criteria applied, record coverage and areas not examined, and place previous readings beside current ones for in-service surveys. Findings that need attention go to your representative during the shift. Data can be exported to your inspection data system rather than retyped. See NDT inspection software and NDT reporting in Toronto. Ontario inspection companies can run jobs, certifications and calibration in Atlantis ERP for Ontario, and owners can place results on a digital twin of an Ontario asset.

Ontario cities we cover

Direct answer: Atlantis mobilises crews to sites anywhere in Ontario. There is no Atlantis office or lab in the province. These pages cover Ontario cities in more depth.

Toronto and the GTA: ultrasonic testing, PAUT, TOFD, NDT consulting, corporate NDT training, Practical NDT and NDT ERP in Toronto.
Sarnia: NDT consulting, NDT training, Practical NDT, NDT ERP and digital twins.
Hamilton: NDT consulting, digital twins, NDT ERP and Practical NDT.
Nanticoke: digital twins and NDT ERP.
Kitchener, Windsor, Sudbury and Ottawa: Kitchener, refining NDT training in Kitchener, Windsor, Sudbury and Ottawa Practical NDT pages.
Northern Ontario and the nuclear sites: by arrangement, with northern work planned as multi-site campaigns.

How to request inspection in Ontario

Direct answer: Send the asset, site, method if known, governing code, the certification scheme required, quantities, dates and report format. We reply with questions or a written scope and quote, share procedures and technician certifications for approval, mobilise on the agreed date and deliver a Level III-reviewed report.

Send the request. Include the equipment, site, the code (O. Reg. 220/01 with CSA B51 and ASME, owner API 510, 570 or 653 programme, CSA Z662, CSA W59) and whether the item is insured or TSSA-inspected. Submit your Ontario RFQ.
Scoping. We confirm technique, access, site orientation, contractor prequalification, winter protection and the radiography or ultrasonic option.
Scope and quote. A written scope and quote with procedures and certification records. There are no published prices.
Mobilisation and inspection. Significant findings go to your representative during the shift.
Report and close-out. A digital report ready for your inspector and your records.

Frequently asked questions about NDT inspection in Ontario

Who inspects boilers and pressure vessels in Ontario?

TSSA inspects uninsured regulated equipment, and the boiler and machinery insurer's inspectors inspect insured equipment, in both cases by people holding an Ontario Certificate of Competency. Atlantis performs the NDE their inspections rely on and does not sign the inspection.

Is API 510 required in Ontario?

TSSA does not list API 510 or API 570 in its boiler and pressure vessel code adoption. Refiners and chemical plants apply them as engineering practice and corporate standards, and we perform the NDE those programmes call for.

Can you inspect API 653 storage tanks in Ontario?

Yes, for the NDE. We perform floor scanning with UT prove-up, shell thickness, weld examination and settlement readings. The owner's API 653-certified inspector remains the inspector of record and signs the report.

Can Atlantis work at Ontario nuclear stations?

Nuclear work follows the licensee's programme, CSA N285 requirements and the utility's qualification rules. Independent contractors usually support conventional and balance-of-plant scopes unless the licensee qualifies them for more, so we confirm the governing programme before discussing a scope.

Which NDT certification is accepted on Ontario jobs?

It depends on the owner, code and method. CAN/CGSB-48.9712 is widely required in Canada, while US customers often specify SNT-TC-1A. Atlantis's programme is SNT-TC-1A; the scheme your job needs is confirmed at quotation.

Does Atlantis have an office in Toronto or Sarnia?

No. Atlantis is based in Houston, with an office in Hyderabad, India. Crews are mobilised to sites in Ontario on dates agreed during scoping.

How much does NDT inspection cost in Ontario?

Atlantis quotes per scope and has no published prices. Cost depends on method, quantities, access, site requirements, travel, crew size, schedule, winter protection and report format.

Get an Ontario inspection scope

A Chemical Valley turnaround, a tank floor at a Nanticoke tank farm, a crane runway in a Hamilton mill, a battery plant under construction or a mill outage in the north all start with the same information: asset, method, code and dates. Request an Ontario NDT inspection quote, or ask our ASNT NDT Level III about method selection before you fix the scope. Affordable. Accessible. Fully customizable. Browse all inspection services for the full list.

More Atlantis NDT services in Ontario

Part of the full range of NDT inspection services from Atlantis NDT.

Speak to an ASNT NDT Level III

Discuss your inspection requirements with Atlantis NDT. Include the asset, method, location and documents you need reviewed.