Parametric model of a typical piece. Your structure is built to your drawing, not to this shape.
What it is
Welded atmospheric tanks and the bodies that hold bulk material: feed hoppers, bunkers, silo shells, chutes and skirts. Named on our EN ISO 3834-2 certificate as a product type, with EN 14015, EN 12285-2 and API 650 in the certified product-standard scope.
Plate is laser-cut, folded on the press brake into cones and boxes, and welded with continuous seams. Structural steel to 40 mm and austenitic stainless steel from 3 to 16 mm are inside the certified material groups.
Typical pieces
- Feed hoppers and bunkers with wear liners
- Atmospheric storage tanks, rectangular and cylindrical
- Silo shells, cones and skirts in sections
- Chutes, spouts and discharge boxes
- Stainless steel vessels for process lines
Typical applications
Bodies that hold or guide bulk material, and atmospheric vessels that hold liquid at ambient pressure.
- Feed hoppers and bunkers under a crusher, a screen or a loading point
- Silo shells, cones and skirts built in transportable sections
- Chutes, spouts and discharge boxes between two pieces of plant
- Rectangular and cylindrical atmospheric storage tanks
- Stainless vessels and hoppers for process lines and washdown areas
- Wear lined transfer boxes where material changes direction
What we make
Plate work: cut flat, folded into cones and boxes, then closed with continuous seams.
- Plate to 20 mm cut on the laser, development taken from the model rather than laid out by hand
- Folds on the 400 t press brake, 6 050 mm between the housings, 365 mm stroke
- Continuous seams throughout, so a hopper holds fines rather than leaking them
- Wear liners bolted through backing pads so a liner can be changed without cutting the shell
- Structural steel to 40 mm and austenitic stainless from 3 to 16 mm, both inside the certified scope
Measured across the 8 pieces of this group in the gallery below: 1.6 to 4.9 m in the longest dimension, and most of them between 4.4 and 4.8 m. The tallest is 1.6 m and the widest 2.5 m.
Those figures are measured from the pieces in the gallery on this page, not a capacity limit. What the machines take is on the capability pages, and anything outside that is agreed per enquiry.
Mass is not published here. It follows the plate thicknesses the drawing sets, and we do not estimate it from a model. Send the drawing and the mass comes back with the quotation.
What we can make
Pressure vessels are not in this scope: the certificate covers atmospheric tanks. Vessel sections are sized to the paint booth so they are coated whole.
| Item | Machine | Figure |
|---|---|---|
| Laser bed | TRUMPF TruLaser 3040 | 2 000 x 4 000 mm |
| Maximum plate thickness, laser | TRUMPF TruLaser 3040 | 20 mm |
| Press brake table length | DURMA AD-S 60400 | 6 050 mm |
| Press brake force | DURMA AD-S 60400 | 400 t |
| Structural steel, certified thickness (ISO/TR 15608 group 1) | EN ISO 3834-2 scope | up to 40 mm |
| Weld quality level (EN ISO 5817) | EN 1090-2, EN ISO 5817 | level C at EXC2 |
| Austenitic stainless, certified thickness (ISO/TR 15608 group 8) | EN ISO 3834-2 scope | 3 to 16 mm |
| Spray and curing booth | Polin AC spray and curing booth | 7 900 x 5 000 x 4 890 mm |
Finish
Structural steel blasted to Sa 2½ and wet-painted in house, inside and out where specified. Stainless steel delivered pickled on request.
- Raw steel, as welded · Default finish
- Wet paint, primer and top coat
Materials
S235 and S355 for shells and support steel, austenitic stainless where the product or the washdown asks for it, welded between 3 and 16 mm as the certificate allows. Wear plate is fitted as a liner rather than welded into the shell, and its grade is specified by the customer.
- S235 and S355 structural steel, ISO/TR 15608 group 1, welded up to 40 mm under the certificate
- Austenitic stainless steel, ISO/TR 15608 group 8, welded 3 to 16 mm
- Plate, hollow section, angle, channel and flat bar, cut and formed in house
- Material certificates to EN 10204 3.1 when the order asks for them
- Aluminium is outside the certified welding scope and is not offered
Welding
Welded atmospheric tanks are a named product type on the EN ISO 3834-2 certificate, and EN 14015, EN 12285-2 and API 650 sit in its product standard scope alongside EN 1090-2. What is not in scope and is not offered is any vessel under pressure: no PED work, no pressure vessel code, no notified body.
- MAG 135, manual and robotic; the robotic stations run on a 14 m track
- Welding quality system certified to EN ISO 3834-2, certificate W348721, PQM s.r.o.
- Execution class EXC2 to EN 1090-2 unless the drawing calls for more
- Weld quality level C to EN ISO 5817, the level EN 1090-2 assigns to EXC2
- Procedures to EN ISO 15609-1, qualified to EN ISO 15614-1, welders to EN ISO 9606-1
- Welding coordination by an International Welding Engineer
Surface treatment
Structural steel bodies are blasted to Sa 2½ and wet painted in house, inside and out where the drawing specifies it. Stainless is delivered pickled on request; it is never painted to hide a weld.
- As welded, deslagged and cleaned, where the drawing asks for nothing more
- Blasting to EN ISO 8501-1 Sa 2½ in the compressed-air chamber, 8 000 x 5 000 x 3 000 mm
- Wet paint in the Polin booth, 7 900 x 5 000 x 4 890 mm, cured at 75 to 80 °C
- Primer and top coat to the system the drawing specifies
- Hot-dip galvanising on request, through a partner; there is no bath in this hall
- Powder coating is not offered
Inspection and documentation
Seams are visually tested to EN ISO 17637 and assessed to EN ISO 5817. Where a tank has to be tight rather than merely welded, a leak test is agreed with the order and its method written into it: this hall does not assume a test the drawing has not asked for.
- Visual testing of every weld to EN ISO 17637, assessed against EN ISO 5817
- Dimensional inspection to EN ISO 13920; the tolerance class is agreed on the drawing
- Measurement with a FARO Arm Prime 10 where the drawing needs a report
- Welding procedure specifications and their qualification records with the delivery
- Welder qualifications to EN ISO 9606-1
- Ultrasonic, magnetic particle and penetrant testing on request
- Coating thickness reports on request
What does not ship is an EN 1090-1 declaration of performance. TANAX TRUCKS a. s. publishes no EN 1090-1 factory production control certificate, so this site does not claim one; EN 1090-2 is the execution standard the welding system works to.
What we need from you
A hopper or a tank is quoted from the shell drawing and the duty. Send:
- The drawing, as PDF, and as STEP, DXF or DWG where you have it
- The material specification, grade by grade
- The weld quality level or the execution class, if the drawing does not carry it
- The finish: as welded, blasted, primed, painted to a system, or galvanised
- The quantity, and whether it is a one-off, a batch or a repeat call-off
- The date you need it on site, and the delivery address
A drawing is enough to quote from. Nothing here needs a specification written first.
The route through the hall
- 01
CNC laser cutting
Plate to 20 mm on a 2 000 x 4 000 mm bed, 3 200 W. Nests are cut from the customer's DXF or from our own unfolds.
- 02
CNC bending
400 t press brake with a 6 050 mm table and 365 mm stroke. Long folds in one hit; cones and boxes for hoppers and housings.
- 03
Welding
MAG 135, manual and robotic. A dual robotic station on a 14 m track and a second robotic cell with 2 008 mm reach, under an EN ISO 3834-2 system with an IWE welding coordinator.
- 04
Blasting and painting
An 8 000 x 5 000 x 3 000 mm compressed-air blasting chamber on rails into a 7 900 x 5 000 x 4 890 mm spray and curing booth, wet paint cured at 75 to 80 °C.
- 05
Inspection
Visual weld inspection under the welding coordinator and dimensional measurement with a six-axis FARO Arm Prime 10.
From the shop
From the shop
Structures that have left this hall, shown as anonymous models: the geometry we welded, its real overall size, and nothing that identifies whose drawing it was.
8 models
Each model is rendered from the production geometry in raw steel, without paint, and is shown as a still. Customer names, machine designations and drawing numbers are not published; part lists and files are not offered. The interactive model above this section is a parametric example, not one of these.
Where this fits
Plate work runs through cutting, forming, welding and painting, and it goes to construction plant builders and to agricultural machinery makers.
Questions we are asked before a first order
- What steel do you weld?
- The certified welding scope is ISO/TR 15608 group 1, unalloyed and fine-grain structural steels up to 40 mm, and group 8, austenitic stainless from 3.0 to 16.0 mm. S235 and S355 are the grades we work most and both sit in group 1. Aluminium is outside the certified scope and is not offered.
- To what weld quality do you work?
- Execution class EXC2 to EN 1090-2, which assigns weld quality level C to EN ISO 5817, under our certified EN ISO 3834-2 welding quality system. Welding is MAG 135, manual and robotic. If your drawing calls for level B, say so on the drawing and we will price it.
- Can you paint or galvanise it?
- Wet paint, in our own line: a blasting chamber rail-connected to a spray and curing booth, so a piece is blasted and painted without leaving the building. Powder coating is not offered. Galvanising is on request.
- What do you need from me to quote?
- The drawing, as STEP, DWG, DXF, PDF or ZIP; the material specification; the weld quality class if it is not the standard one; the finish; the quantity or the series size; and the date you need it. A 2D drawing is enough to start.
- How big a piece can you take?
- The published machine figures are in the envelope table on this page and in full on the capabilities page: the laser bed, the press brake, the boring mill travels, the blasting and paint booths. Crane capacity, maximum weldment size and mass, and transport limits are not published by the parent company and are confirmed per enquiry rather than estimated here.
- Do you build pressure vessels?
- No. The certified welding scope names welded atmospheric tanks, and the product standards on the certificate are EN 12285-2, EN 14015 and API 650, all of them atmospheric. Pressure equipment is not offered. Hoppers, bunkers, chutes and atmospheric tanks are.
Anything not answered here is answered on the enquiry, not estimated on this page.
Start here
Send the drawing. We answer with a price and a date.
STEP, DWG, DXF, PDF or ZIP, up to five files. Your drawings stay private: they are stored outside the web server and read only by our engineers.