What is a half-pipe tipper trailer?

A half-pipe tipper trailer (also called a tub or bathtub trailer) is a low-chassis tipping trailer with a rounded tub profile, used mainly for soil, aggregates, rubble, and excavated material. The low suspension makes loading by excavator easier. The body may be structural steel (S355) or wear-resistant Hardox steel.

Where does a half-pipe body crack most often?

The most common cracks on a half-pipe trailer: the floor in the discharge zone and under excavator bucket impacts, the floor-to-sidewall transitions, the rear corners at the tailgate, and areas around reinforcements. These are stress-concentration points under abrasion and overloading.

Do you repair half-pipe bodies made of Hardox steel?

Yes. We weld half-pipe bodies made of Hardox 400/450/500 with the correct wire selection and preheating according to plate thickness, so the weld does not become brittle. We describe the details in our article on welding Hardox tipper bodies.

Is a half-pipe trailer subject to TDT inspection?

No. TDT inspection applies to pressure vessels (silo trailers, tankers). A half-pipe trailer is subject to periodic vehicle roadworthiness tests, not TDT supervision.

Is it better to weld a cracked half-pipe body or replace a plating section?

It depends on the scale. A single crack is repaired by welding with notch relief so it does not return. When the plate is worn through over a larger area or cracks are multiple, replacing the whole plating section pays off — new plate holds better than a patched fragment. We decide after inspection.

How can I tell a half-pipe body is about to crack?

Early signs are floor bulges and dents, loss of tightness in the rear corners, corrosion traces from below, and fine scratches at the tailgate hinges. Caught early, they allow the notch to be welded before the crack runs through the whole section — a cheaper repair than replacing the plating.

How long does repairing a cracked half-pipe take?

As a guide: welding a single body or tailgate crack usually takes 1–3 working days, and an accident repair with straightening and painting 3–10 days. We set the exact date after inspection or based on photo documentation. Ask for a quote.

serwis 08.04.2024

Half-Pipe Tipper Trailer Repair — Typical Cracks and Body Welding

Name: PHS Magnum
Address: ul. Kościelna 9, Chorula, Opolskie, 47-316, PL
Telephone: +48 602 716 551
Price range: $$

Service of silo trailers and specialist trailers

In short

Half-pipe tipper trailer repair is above all welding of the body (floor, sidewalls, corners) made of S355 or Hardox steel, straightening after impacts, and tailgate repair. A half-pipe works with aggregates and excavated material — abrasion and overloading cause fatigue cracks in predictable places. PHS Magnum in Chorula welds, straightens, and paints half-pipe bodies, with a crane up to 10 tonnes.

The half-pipe works hardest in the whole fleet

A half-pipe tipper trailer (tub trailer) carries soil, aggregates, and rubble — abrasive loads, dropped in by excavator bucket, often overloaded. The body takes mechanical impacts and wears from the inside. The result: cracks in recurring places.

Where a half-pipe cracks

The floor — in the discharge zone and under direct bucket impacts
The floor-to-sidewall transition — bending stress concentration
Rear corners at the tailgate — tearing and cracking
Around reinforcements and hinges — welding notches

Scope of half-pipe repair

Body welding. We repair cracks in S355 and Hardox steel. For Hardox we select the wire and preheating so the weld does not crack again — the methodology is described in welding Hardox tipper bodies.

Straightening and bodywork. We straighten bent sidewalls and deformed corners; for serious damage we replace the plating section.

Tailgate and hinges. The part most often torn off — straightening, welding, replacement of hinges and locks, adjustment.

Tipping hydraulics. Leaks and a sinking body are a separate topic — tipper cylinder overhaul.

Anti-corrosion painting. After welding: sandblasting, epoxy primer, topcoat — a half-pipe corrodes from below faster than other trailers.

Symptom → cause → repair

Symptom	Cause	Repair
Floor crack in the discharge zone	bucket impacts, abrasion	welding in a reinforcement or section replacement
Rear corner losing tightness	tearing during discharge	welding with notch relief
Sidewall bulges and dents	overloading, mechanical impacts	straightening; if serious — plating replacement
Torn / skewed tailgate	overloading, worn hinges	straightening, welding, hinge and lock replacement
Corrosion from below	moisture, worn-through paint layer	sandblasting, epoxy primer, topcoat

How a half-pipe repair proceeds — step by step

Inspection and quote. We assess the scope (body, tailgate, hydraulics, paint) and prepare an estimate; for accident damage we produce photo documentation. Ask for a quote.
Weld preparation. Grinding out and exposing the cracks, bevelling the edges; for Hardox, wire selection and preheating according to thickness.
Welding and straightening. Crack repair, straightening of sidewalls and corners, plating section replacement if needed.
Tailgate and hinges. Straightening, welding, replacement of hinges and locks, fit adjustment.
Painting. Sandblasting, epoxy primer, topcoat — with emphasis on the underside, which corrodes fastest.

Repair in one place

We repair half-pipes comprehensively — body, hydraulics, tailgate, paint — in the hall in Chorula (4 km from the A4). Full scope: tipper and half-pipe trailer service. Tipping hydraulics based on Hyva equipment are serviced in the same hall.