Inspection

Construction and commissioning inspection

Commissioning is the last time every weld, flange and support is accessible at once, and the first time the plant’s condition is recorded. Getting construction inspection right protects the start-up schedule; getting the baseline right protects every inspection that follows. We provide inspection and NDT from fabrication through mechanical completion and handover.

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Construction QA/QC

  • Inspection and test plan (ITP) review and hold-point inspection.
  • Weld visual inspection and NDE to the extent the code and specification require: ASME B31.3 normal, severe cyclic or Category M service; ASME Section VIII full or spot radiography; AWS D1.1 structural welds.
  • UT in lieu of RT where the code and owner allow it, using PAUT or AUT with qualified procedures.
  • Post-weld heat treatment record review and hardness verification.
  • PMI on alloy components to a material verification programme.

Pressure and leak testing

We witness and document hydrostatic and pneumatic tests to ASME B31.3 paragraphs 345.4 and 345.5 and ASME Section VIII UG-99 and UG-100, check test-pack completeness, gauge calibration and hold times, and carry out sensitive leak tests to ASME Section V Article 10 where specified.

Baseline for the inspection programme

Baseline thickness readings at the condition monitoring locations that the in-service programme will use, holiday testing of linings and coatings before they are buried or put into service, and as-built records that let the first in-service inspection measure a real corrosion rate rather than guessing from nominal thickness.

Turnover dossiers

Weld maps, NDE reports, PWHT charts, PMI logs, test records and certificates are compiled into turnover dossiers organised by system, so operations inherits a complete record rather than a pile of reports.

Governing codes and standards

  • ASME B31.3 (process piping)
  • ASME Section VIII Division 1 (pressure vessels)
  • ASME Section V (NDE methods)
  • AWS D1.1 (structural welding)
  • API 650 (new storage tanks)
  • API RP 578 (material verification)

What you receive

  • ITP hold-point inspection records
  • NDE reports by weld
  • Pressure-test witnessing records
  • Baseline thickness data by CML
  • System turnover dossiers

Industries served

  • Refinery and petrochemical projects
  • LNG and gas processing
  • Power plants
  • Fabrication yards
  • Pipelines
  • Storage terminals

Frequently asked questions

Why take baseline thickness readings at commissioning?

Without a measured starting thickness, the first in-service inspection can only compare with nominal thickness, which overstates or hides corrosion. A baseline lets corrosion rates and remaining life be calculated correctly from the start.

Talk to an inspection engineer

Send the equipment list or drawings, the inspection you need and your timing. Quotes are prepared for each scope and region.

Request a Quote

Request an inspection quote (RFQ)

Tell us the asset, the method, where it is, the governing code, your dates, the size of the job and the report you need. We reply with questions or a quote. Affordable, accessible, fully customizable — no published pricing.












Or email the same details to info@atlantisndt.com. Mobilisation: North America; confirm your location in your RFQ.

Speak to an ASNT NDT Level III

Atlantis NDT provides ASNT Level III consulting, NDT training to ASNT SNT-TC-1A, inspection management software and independent report validation. Request a free consultation and we will return a tailored quote — affordable, accessible and fully customizable to your programme.