Chorula k. Opola 4 km from motorway A4 Mon-Fri 06:00-20:00
+48 602 716 551

Feldbinder TDT Inspection

Feldbinder EUT/KIP TDT inspection: NDT, hydrostatic test, post-weld passivation, food-grade certificate. ISO 9001:2015. Chorula near Opole.

DAF Magnum PHS Magnum silo trailer fleet at silos

Feldbinder TDT Inspection — Specialist Procedure

Feldbinder EUT and KIP trailers are pressurised stainless steel tanks subject to full TDT statutory inspection. Periodic inspection every two years is mandatory. Key differences from Spitzer:

  • Stainless steel rather than aluminium → different NDT methods (PT/VT rather than MT)
  • More stringent food-grade requirements applying to the majority of the fleet
  • Post-weld passivation required after every weld repair (a critical procedure)
  • Cleanliness certificate required for food-grade trailers

PHS Magnum holds the full range of competencies: ISO 9001:2015 certification, ISO 9606-1 certified welders, passivation equipment, Feldbinder technical documentation, and coordination with the regional TDT office in Katowice.

Scope of the Feldbinder TDT Inspection

Visual Inspection of the Tank

External:

  • Condition of the protective coating (external stainless steel surface, paint on mountings)
  • Mountings (fifth-wheel coupling, supports, tipping cylinder mountings for KIP models)
  • Identification plates (Feldbinder markings, technical specifications, date of last inspection)

Internal (requires confined-space tank entry with a safety attendant):

  • Internal surface (cleanliness, absence of corrosion, passivation condition)
  • Internal welds (visual check, markings)
  • Aeration pads (attachment, condition)
  • Discharge spouts (attachment, internal corrosion)

Non-Destructive Testing (NDT)

For Feldbinder stainless steel tanks:

  • PT (Penetrant Testing) — required method for austenitic (non-ferromagnetic) stainless steel
  • VT (Visual Testing) — always applied, covering the entire tank
  • RT (Radiography) — used selectively for the highest-responsibility welds (e.g. after plate section replacement)

PT procedure: penetrant is applied to the weld surface; after it is drawn into any cracks, a developer is applied and discontinuities become visible. Sensitivity: cracks from 0.05 mm.

Hydrostatic Pressure Test

  • Tank filled with demineralised water (required for food-grade; industrial water is acceptable for general-purpose trailers)
  • Test pressure: 1.5× working pressure (typically 0.45 MPa for a 0.3 MPa working pressure tank)
  • Hold time: 10–30 minutes
  • Visual inspection under pressure
  • Pressure drop over time — monitored within acceptable limits

Pneumatic System Inspection

  • Safety valves (calibration, functional test)
  • Pressure gauges (accuracy)
  • Filters and air dryers (where fitted)
  • Pressure sensors
  • Additional for KIP models: hydraulic tipping system inspection (hydraulic pressure test to 1.5× working pressure — typically up to 300 bar)

Food-Grade Specific Checks

  • Surface roughness measurement (Ra) of the internal surface — requirement: Ra ≤ 0.8 µm
  • Passivation test — potassium ferricyanide spot test (no reaction = passivation intact)
  • Gasket certification check — FDA and EC 1935/2004 compliance
  • Material certificates for all food-contact components

PHS Magnum Preparation Package

Step 1: Internal Wash

For food-grade trailers:

  • Removal of material residues
  • Hot-water wash (60–80°C) with food-grade detergent
  • Demineralised water rinse
  • Chemical disinfection where required (e.g. after sugar transport: peracetic acid)
  • Blow-dry with filtered compressed air

For general-purpose trailers:

  • Industrial water wash
  • Rinse
  • Blow-dry

Step 2: Internal Inspection with Documentation

Confined-space tank entry with a safety attendant (restricted atmosphere; gas levels measured prior to entry; external standby required).

Photographic documentation: 360° interior views, macro shots of welds, aeration pads, and discharge spouts.

Step 3: Minor Preventive Repairs

  • Replacement of hatch seals (where wear is evident)
  • Lubrication of hatch pins
  • Safety valve calibration
  • Replacement of inaccurate instruments (pressure gauges, sensors)

Step 4: Passivation (where weld repairs have been carried out)

Weld grinding → nitric acid treatment → demineralised water rinse → drying → documentation.

Step 5: Internal Pre-Test Hydrostatic Pressure Test

We conduct a test at 1.5× working pressure before the official inspection — eliminating the risk of a failed outcome on the day.

Step 6: Documentation Compilation

  • Previous TDT inspection certificate
  • Feldbinder technical data card (VIN, model, specifications, manufacturing date)
  • Weld repair history with passivation protocols
  • Material certificates (welding wire, FDA gaskets)
  • Cleanliness certificates from previous inspections

Step 7: TDT Coordination

We schedule the TDT inspector from the Katowice office 7–14 days in advance. The inspector attends PHS Magnum’s workshop.

Timescales

Total process time (from trailer arrival to departure with a valid TDT certificate):

  • Standard scenario: 2–3 working days
  • With weld repairs required: 5–10 days
  • With accident damage repairs: 10–20 days

Contact us for a quote tailored to your trailer’s condition.

Frequently Asked Questions

A periodic inspection is required every 2 years (24 months from the previous inspection date as stated in the TDT document). An extraordinary inspection is required after any weld repairs to the tank, after accident damage repairs, or after structural modifications. Without a valid TDT certificate, the vehicle cannot operate in transport.

Yes. For food-grade trailers (carrying food products), additional requirements apply: a certificate of internal tank cleanliness, passivation certification (if weld repairs were carried out), surface roughness measurement (Ra ≤ 0.8 µm), and FDA / EC 1935/2004 gasket approval. The TDT inspector may request further documentation.

A complete preparation package: 1) internal wash (with disinfection for food-grade); 2) internal visual inspection with confined-space tank entry; 3) any minor preventive repairs; 4) safety valve check and calibration; 5) surface passivation where weld repairs have been carried out; 6) replacement of worn hatch seals; 7) compilation of the full maintenance history; 8) internal pre-test hydrostatic pressure test.

Standard scenario: 2–3 working days. Days 1–2 — preparation (washing, inspections, minor repairs). Day 3 — TDT inspector visit (official inspection 2–4 hours), certificate issued, trailer ready to depart. If significant repairs are required (NDT reveals cracks, corrosion) — lead time extends to 7–14 days.

Yes. PHS Magnum welders hold ISO 9606-1 certification for austenitic stainless steel (304L/316L as used by Feldbinder). All welding procedures follow Feldbinder WPS documentation. Full scope: TIG, MIG/MAG welding, post-weld passivation, and NDT after repair — essential when a TDT inspection reveals micro-cracks in welds.

Yes. Every weld repair to a stainless steel Feldbinder tank requires passivation of the weld zone and HAZ (Heat Affected Zone). The procedure: weld grinding to Ra ≤ 0.8 µm, 20–50% nitric acid, 30–60 minutes dwell, demineralised water rinse, drying. We issue a passivation protocol for the trailer's records. Passivation is included as standard in our weld repair package.

The inspector refuses to issue a certificate and provides written reasons. PHS Magnum then immediately: 1) carries out a detailed assessment of required repairs; 2) provides a cost estimate; 3) performs all repairs (welding, component replacement, passivation); 4) conducts an internal hydrostatic test; 5) arranges a re-inspection; 6) completes the repeat TDT. Thanks to our preparation package, negative outcomes are rare — fewer than 5% of inspections.

Contact & Hours

ul. Kościelna 9, 47-316 Chorula

Mon-Fri 06:00-20:00

Sat 07:00–15:00

+48 602 716 551 Contact us
DEKRA ISO 9001:2015 Quality Management Certificate — PHS Magnum

ISO 9001:2015

4 km from motorway A4

180 km from German border

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Pogotowie Techniczne TIR & SILO +48 602 716 551