Precision under pressure: Hydrotesting and Reinstating at Dow’s Olympia Project

About Dow Benelux B.V.

Dow in the Netherlands operates at three locations — Terneuzen, Delfzijl and Dordrecht — where it produces plastics and base chemicals used in countless everyday products such as electronics, sports shoes, solar panels, cars, insulation and paint.

Our Activities

Hydrostatic testing of new piping systems
Verification of weld integrity and compliance with standards
Mechanical reinstatement of valves, flanges, gaskets, and supports
Equipment management and calibration
Coordination with Dow’s project team for safe and efficient execution

Challenge

Within Dow’s large-scale Olympia Project, J. de Jonge | Progresso was entrusted with a highly critical and time-sensitive scope: performing complex hydrostatic pressure tests and reinstating high-pressure piping systems.

The challenge lay in executing these precision tasks under tight deadlines, ensuring compliance with strict safety, quality, and design standards — all while maintaining operational continuity on site.

Scope of work

The project involved multiple water-based pressure tests to confirm the integrity of newly installed piping networks. Every weld and connection was subjected to test pressures exceeding operational levels, verifying full compliance with Dow’s stringent specifications.

After successful testing, the reinstatement phase required meticulous mechanical work — reinstalling every valve, flange, gasket, studbolt, and support exactly as designed.

To support flawless execution, all critical tools and equipment were supplied by Lexrent, including electric impact wrenches, hoisting tools, fall protection, pressure pumps, and calibrated manometers. This ensured a safe, efficient, and compliant workflow across all phases.

The Result

The works were completed safely, on time, and in full accordance with Dow’s quality and safety requirements. All systems passed hydrotesting and were reinstated ready for operation, marking another successful contribution by J. de Jonge | Progresso to Dow’s Olympia Project.

Dow Benelux expressed their appreciation for the collaboration and professionalism shown on site:

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“Your support has been instrumental and clearly much appreciated. You have proved to us J. de Jonge delivers! Many thanks for all your support, it will not be forgotten.”

“On behalf of DOW, I want to sincerely thank J. de Jonge for the invaluable support provided to our project. It has been a real pleasure working with your team on site.”

Questions? Our Experts Are Here to Help You!

Yoeri de Rijke

Business Unit Manager Progresso