Entries by Farid Farnia

TQIS – Pressure Equipment & Industrial InspectionsSafety. Quality. Compliance.

IntroductieSafe and reliable pressure equipment starts with thorough inspection and metallurgical assessment.TQIS specializes in the inspection of pressure equipment and industrial installations. We ensure full compliance with the highest safety and quality standards, including ASME and PED. Our ExpertiseWith in-depth knowledge in materials science, failure analysis, and Test & Inspection Plans (TIP), we help industrial […]

/by

Every Weld Tells a Story — and Sometimes It Whispers Before It Breaks

A silent threat in a pressurized recirculation line.Inspection is not a snapshot.Sometimes, you read the life story of a weld… and uncover a ticking time bomb. This case involves a WB36 pipe (⌀ 298.6 × 23 mm), operating at 375 °C and 346 kgf/cm². During a routine inspection, I detected a subtle MT indication in one of […]

/by

THE ROOT GAP: A SMALL OPENING WITH GREAT IMPACT

The quality of a weld is not made during welding.It is determined during fit-up. The root gap, that seemingly simple slit between two workpieces., can seal the fate of the entire joint. Too narrow? You risk lack of fusion.Too wide? You invite distortion and residual stresses. As an inspector, I often see this:Welds that look […]

/by

Inspection of pressure equipment

Copyright © Farid Farnia 2025Alle rechten voorbehouden.Delen van publicaties is toegestaan met bronvermelding.Kopiëren of overnemen van inhoud is niet toegestaan zonder voorafgaande toestemming en duidelijke naamsvermelding.

/by

TQIS – Pressure Equipment & Industrial Inspections

Safe and reliable pressure equipment starts with thorough inspection and metallurgical assessment. TQIS specializes in the inspection of pressure equipment and industrial installations. We ensure full compliance with the highest safety and quality standards, including ASME and PED. With in-depth expertise in materials science, failure analysis, and Test & Inspection Plans (TIP), we help industrial […]

/by

fatigue, failureanalysis: Fracture Without Fault. Spring Under Fire.

What fails when everything ‘checks out’? A spring never breaks without reason.If everything is right and failure still occurs,you’re either not looking closely — or not deep enough. A spring, faithfully in service for years.No wear. No material defect.No visible trigger.And yet: a textbook fracture. Scanning Electron Microscopy (SEM) revealed it unmistakably:High Cycle Fatigue (HCF) […]

/by

LASSEN

Een las zonder verhaal is ook een verhaal. Bij schadeonderzoek richten we ons vaak op scheuren, falende zones of aangetast materiaal.Maar wat als de las… niets laat zien? Bij een onderzoek naar spanningscorrosie in een recirculatiepersleiding heb ik de lasnaad grondig geanalyseerd. De resultaten?– Geen insluitsels.– Geen bindingsfouten.– Geen afwijkende microstructuur.– Alleen een egaal gegloeide, […]

/by