TDT Inspection for Concrete Pumps – Poland

TDT/WDT concrete pump inspection – legal requirements and practical guide

Legal basis

The obligation for technical inspection of concrete pumps derives from:

• Polish Technical Supervision Act (Journal of Laws 2023, pos. 1622) – art. 4, 5, 14
• EN 12001:2012 – safety requirements for equipment for the conveyance of concrete

Machines covered: all boom pumps, trailer pumps over 40 m3/h, truck mixer pumps used commercially.

What the TDT inspector checks

1. Documentation review – service records for the past 2 years, machine passport, operator manual in Polish
2. Visual inspection – coating condition, all boom welds, stabilizer attachments, hydraulic hoses
3. NDT testing – magnetic particle testing (MT) or visual testing (VT) of critical weld areas
4. Hydraulic pressure test – 1.25 × MOP for 10 minutes
5. Safety device testing – load limiter, tilt sensor, stabilizer locks, emergency STOP

Most common reasons for failing TDT

1. Boom weld cracks (not visible without MT) – 40% of cases
2. Defective safety devices – 25%
3. Missing or incomplete service documentation – 20%
4. Hydraulic system leaks – 10%
5. Excessive wear in boom pins and bearings – 5%

Preparation timeline

• 6 weeks before: Book pre-inspection service with PHS Magnum
• 3-4 weeks before: Repair identified issues, compile documentation
• 2 weeks before: Confirm TDT inspector appointment
• Day of inspection: Clean machine, full hydraulic oil, trained operator available

Contact us at +48 602 716 551 with your pump serial number and certificate expiry date.