Technical guides on testing, inspection and certification from Metlab — NDT, welding, concrete, pressure systems and materials engineering.https://metlab.ie/en-iehttps://metlab.ie/blog/welder-qualification-en-iso-9606-1-explained/https://metlab.ie/blog/welder-qualification-en-iso-9606-1-explained/What an EN ISO 9606-1 welder qualification involves in Ireland — the test, the ranges, six-month confirmations, and the three revalidation routes explained.Wed, 08 Jul 2026 00:00:00 GMTWelding & Certificationhttps://metlab.ie/blog/pressure-vessel-inspection-intervals-ireland/https://metlab.ie/blog/pressure-vessel-inspection-intervals-ireland/What Irish law requires for pressure systems — S.I. 445 of 2012, Part 10 and Schedule 12, the competent person, examination intervals and owner duties.Wed, 01 Jul 2026 00:00:00 GMTPressure Systemshttps://metlab.ie/blog/choosing-the-right-ndt-method-ut-rt-mpi-dpi/https://metlab.ie/blog/choosing-the-right-ndt-method-ut-rt-mpi-dpi/A practical decision guide to the main NDT methods — what each finds, where each fails, and how to specify the right one for welds and in-service plant.Wed, 24 Jun 2026 00:00:00 GMTNon-Destructive Testinghttps://metlab.ie/blog/wps-wpqr-weld-procedure-qualification-explained/https://metlab.ie/blog/wps-wpqr-weld-procedure-qualification-explained/The difference between a WPS and a WPQR, how ISO 15614-1 qualification works, what testing a procedure involves, and when ASME IX applies instead.Wed, 10 Jun 2026 00:00:00 GMTWelding & Certificationhttps://metlab.ie/blog/cqa-landfill-lining-epa-projects-guide/https://metlab.ie/blog/cqa-landfill-lining-epa-projects-guide/Why EPA-licensed containment projects need independent CQA — geomembrane seam testing, leak location surveys, clay liner testing and the validation record.Wed, 03 Jun 2026 00:00:00 GMTEnvironmental & CQAhttps://metlab.ie/blog/concrete-cube-testing-guide-is-en-12390/https://metlab.ie/blog/concrete-cube-testing-guide-is-en-12390/How concrete cube testing works under I.S. EN 12390 — sampling, curing, 7 vs 28-day results, the real reasons cubes fail, and what to do when one does.Tue, 19 May 2026 00:00:00 GMTConcrete & Materialshttps://metlab.ie/blog/corrosion-under-insulation-cui-detection/https://metlab.ie/blog/corrosion-under-insulation-cui-detection/Why corrosion under insulation is the classic surprise failure on insulated plant, where CUI risk concentrates, and how structured survey programmes detect it.Tue, 05 May 2026 00:00:00 GMTCorrosion & Integrityhttps://metlab.ie/blog/tank-floor-mfl-scanning-eemua-159/https://metlab.ie/blog/tank-floor-mfl-scanning-eemua-159/How magnetic flux leakage scanning finds underside corrosion in storage tank floors, and where it fits in EEMUA 159-based tank integrity programmes.Tue, 28 Apr 2026 00:00:00 GMTAsset Integrityhttps://metlab.ie/blog/butt-fusion-vs-electrofusion-pe-pipe-joints/https://metlab.ie/blog/butt-fusion-vs-electrofusion-pe-pipe-joints/How butt fusion and electrofusion PE joints differ, where each belongs on water networks, why joints fail, and how independent testing proves quality.Tue, 14 Apr 2026 00:00:00 GMTPipelines & Plasticshttps://metlab.ie/blog/iso-17025-accredited-testing-lab-why-it-matters/https://metlab.ie/blog/iso-17025-accredited-testing-lab-why-it-matters/What ISO/IEC 17025 accreditation actually verifies, how it differs from ISO 9001, how to check a lab’s INAB scope, and when specifications should demand it.Wed, 25 Mar 2026 00:00:00 GMTQuality & Accreditationhttps://metlab.ie/blog/en-1090-execution-classes-structural-steel/https://metlab.ie/blog/en-1090-execution-classes-structural-steel/How EN 1090 execution classes work, who decides EXC1 to EXC4, what each class demands of welding and testing, and what CE marking requires of Irish fabricators.Wed, 18 Feb 2026 00:00:00 GMTWelding & Certification