Key takeaways
- The company name states the business environment: storage and handling of mineral oil.
- The orange hazard board carries the hazard identification number above and the four-digit substance number below.
- The hazard identification number is a digit system: the first digit is the primary hazard, further digits are subsidiary hazards.
- Placards show the hazard class and complement the hazard board, but don't replace it.
- Tank farms are private property with particular hazards – entering or approaching them is out of the question.
Contents
Fact file
| Name element 'Oil' | Mineral oil as the commodity reference |
|---|---|
| Name element 'Tanking' | Storage and handling in tanks |
| Classification | Freight and works traffic around tank farms |
| Role | Railway operator (EVU); its sites and tracks are operational railway land |
| Sites, customers and fleet | subject to change – check current details with the company |
How to recognise this operator
Is this really Oiltanking Deutschland?
- A train of tank wagons – a cylindrical tank on an underframe
- Orange hazard boards on the wagon sides and ends
- Diamond-shaped placards with a symbol and class number
- A data panel with a country code and vehicle keeper marking – on tank wagons often a leasing company
- A wraparound orange band on the tank of certain wagons carrying liquefied gases
- Shunting movements with few wagons and notably low speed
Updated: August 2026 – Tank wagons are the most densely marked vehicles in freight traffic. Orange boards, coloured diamonds, strings of numbers, inspection dates – every mark has a meaning and is regulated internationally. Oiltanking Deutschland carries the environment of such traffic in its very name. This page therefore explains how to read the markings on a tank wagon without approaching the hazard area.
Spotted a tank wagon train? Note the locomotive and wagons separately.
Vehicle number, vehicle keeper marking and location in one sighting – logged with Traintrack in seconds.
What is Oiltanking Deutschland?
The company name is unusually descriptive: “Oil” states the commodity, “tanking” the activity – storage and handling in tanks. That marks out the environment clearly: tank farms are junctions between ship, rail, road and pipeline, where liquid goods are stored temporarily and transferred from one mode of transport to another.
In this database the company is listed as a railway operator. For tank farm operators that’s a familiar pattern: tracks run across the site itself, and wagons have to be positioned at the loading points and collected again. Sites, fleet, customers and volumes, on the other hand, are among the details that change over time – this text deliberately doesn’t name them. What does remain valid over time is the marking on the wagons, and that turns out to be remarkably legible.
EVU, EIU and the private siding
A railway operator (EVU) runs trains; a railway infrastructure manager (EIU) operates the tracks. On a works or tank farm site, both roles often coincide: the tracks belong to the operation, and shunting is carried out in-house too. For outsiders that changes nothing – it stays private property.
Recognition in the field: wagon type first
Classify the wagon type
A cylindrical tank on an underframe, usually with a platform and ladder, and a dome with fittings on top: that's a tank wagon.
Count the hazard boards
If orange boards are fitted and carry markings, the wagon is labelled as carrying dangerous goods. Blank or folded-down boards also carry a meaning.
Read the data panel
Country code and vehicle keeper marking next to the vehicle number. On tank wagons this is usually a leasing company. For the system, see reading the UIC number.
Log the locomotive separately
Only the locomotive's own data panel reveals who is running the train – never the wagons'.
Reading the orange hazard board
The rectangular orange board with a black border is the most striking marking on a dangerous goods wagon. It’s divided horizontally: the hazard identification number above, the substance number below.
The lower number is always four digits and identifies a substance or group of substances uniquely worldwide. The upper number, by contrast, describes the type of hazard and works on a digit system: the first digit states the primary hazard, further digits state subsidiary hazards. A doubled digit intensifies the statement, and a zero in the second position means there’s nothing further to add. A leading X signals that the substance must not come into contact with water.
| Digit | Meaning in the hazard identification number |
|---|---|
| 2 | Release of gas due to pressure or chemical reaction |
| 3 | Flammability of liquids and gases |
| 4 | Flammability of solids |
| 5 | Oxidising, fire-intensifying effect |
| 6 | Toxicity or risk of infection |
| 8 | Corrosive effect |
| 9 | Risk of violent spontaneous reaction |
Important: which number combination appears on a given wagon depends solely on the substance currently loaded. It is not a property of a company – not even of the keeper, who for tank wagons is often a leasing company such as VTG – and it changes with the load. Anyone logging a sighting should therefore note the board as an observation about this wagon on this day – not as a feature of a company.
Tank wagons are wanderers
Community sightings show where the same wagons turn up again over time.
The placard and the other markings
Besides the hazard board, a tank wagon carries further markings. They answer different questions – and that’s exactly where their value lies.
| Marking | Shape and location | What it states |
|---|---|---|
| Orange hazard board | Rectangle, on the sides and ends | Type of hazard and substance loaded |
| Placard | Diamond with symbol and class number | Hazard class the substance is assigned to |
| Wraparound orange band | Stripe running around the tank | Marking for certain wagons carrying liquefied gases |
| Vehicle number and vehicle keeper marking | Data panel on the side | Identity and keeper of the wagon |
| Capacity and tank details | Marking block on the tank or frame | Build, test conditions and volume of the tank |
| Inspection dates | Data panel, often with a date | Date of the last tank and vehicle inspection |
| Load limits and tare weight | Grid on the underframe | Permitted load per route class |
The vehicle side of this kind of traffic is unspectacular and follows a clear logic: on works and private sidings, tractive effort at low speed matters, not top speed. Typical examples are industrial locomotives such as the Vossloh G 1000 BB or the MaK G 1206, as well as shunting locomotives such as the Class 295. Comparable traffic around tank farms and chemical plants can also be found at Oiltanking Tanklager Waltershof, Transpetrol and Chemion Logistik.
Safety: the site is not an option
Tank farms are private property with particular hazards
Tank farm, works and port sites are subject to ignition source bans, explosion protection zones and strict access rules. There's also shunting without signal protection, moving loading equipment, and handling of flammable substances. The site must not be entered – not at weekends, not through an open gate, not for a photo. Track and shunting areas are off-limits without exception. Observe only from publicly accessible locations and keep the safe distance from the track.
Is your tank wagon sighting usable?
- Full vehicle number of the locomotive, including the check digit
- Country code and vehicle keeper marking of the locomotive
- Number of wagons and their type
- Whether the hazard boards are marked or blank
- Operating point or line section rather than just the town
- Date, time and direction of travel
Where shunting is intensive, additional rules apply to where you stand – the guide to spotting at a marshalling yard sums these up. How to break down vehicle numbers so a note becomes an unambiguous identification is shown in the guide to reading the UIC number.
Common mix-ups
- Hazard board and placard – a rectangle with numbers versus a diamond with a symbol; two markings with different purposes.
- Vehicle keeper marking and shipper – the tank wagon usually belongs to a leasing company, not to the business that fills it.
- Tank wagons and hopper wagons – both are closed container wagons, but hopper wagons carry free-flowing solids.
- Blank board and harmless load – even a cleaned or emptied wagon can carry residual hazards and is treated accordingly.
- Orange band and hazard board – the wraparound band on the tank is a separate marking and doesn’t replace a board.
Verdict
Oiltanking Deutschland stands for an environment where rail operations happen behind fences – and where everything important is nonetheless visible on the vehicle itself. Anyone who can read the markings on a tank wagon understands more about a train at a glance than any name search could ever provide.
In short
Hazard identification number above, substance number below, plus the placard alongside: the markings on a tank wagon are regulated internationally and independent of the operator. They describe today's load – not the company.
Document tank wagon traffic
Locomotive, wagon count, location and date logged together – safely from a distance, permanently traceable.
Summary
- Company names that reference a commodity allow a reliable read on the environment, but not on specific workings.
- The hazard board and the placard are two separate markings that carry different information.
- Further markings on a tank wagon describe its build, capacity, inspections and equipment.
- Observation is only possible from publicly accessible locations outside the site.
Frequently asked questions
What is Oiltanking Deutschland?
A company whose name states its business environment directly: "Oil" stands for mineral oil, "tanking" for storage and handling in tanks. In this database it is listed as a railway operator – a familiar pattern for tank farm operators, whose sites typically run their own rail operations on private sidings. Sites, fleet and traffic are among the details that change over time.
What is shown on the orange hazard board?
Two numbers separated by a horizontal line. Above is the hazard identification number, which describes the type of hazard; below is the four-digit substance number (UN number), which identifies the substance or group of substances uniquely worldwide. Which numbers appear on a given wagon depends solely on the current load – not on the company.
How is the hazard identification number structured?
It consists of two or three digits. The first digit states the primary hazard, and further digits state subsidiary hazards. A doubled digit intensifies the stated hazard. A zero in the second position means there is nothing further to add. A leading X indicates that the substance must not come into contact with water.
What do the individual digits mean?
They stand for hazard types: release of gas under pressure or by chemical reaction, flammability of liquids or solids, oxidising effect, toxicity, radioactivity, corrosive effect, and the risk of violent spontaneous reaction. The system is regulated uniformly worldwide, which is why it works independently of language and country.
What is the difference between the hazard board and the placard?
The hazard board is rectangular, orange and carries numbers. The placard is diamond-shaped, coloured and shows a symbol with a class number. The board states the exact hazard and substance, while the placard assigns the substance to a hazard class. Both belong together and are fitted side by side.
What other markings appear on a tank wagon?
Besides the vehicle number and vehicle keeper marking, these include the capacity in litres, details of the tank's construction and its test conditions, the date of the last tank inspection, tare weight, load limits and notes on equipment such as safety valves or heating systems. These details describe the wagon – not its current load.
Why are tank wagons often owned by leasing companies?
Because they are expensive specialised vehicles with long inspection and maintenance cycles. Shippers and logistics firms therefore often lease them rather than maintaining their own fleets. For identification purposes this means the vehicle keeper marking on a tank wagon almost never names the company operating the train or loading the substance.
Am I allowed to take photographs at a tank farm?
The site itself is private property and closed to outsiders. Special rules apply there because of flammable substances, ignition source bans and handling operations; track and shunting areas are off-limits regardless. Observe only from publicly accessible locations outside the site and respect barriers and signage without exception.
Log a sighting of Oiltanking Deutschland
Vehicle, location and date logged in seconds – and visible to the community.
Vehicles in the rolling stock database
Vossloh G 1000 BB
The Vossloh G 1000 BB is one of the most frequently seen diesel locomotives of private operators: four axles, diesel-hydraulic, with a centre cab and two hoods of unequal length.
ClassClass 295
Class 295 belongs to the V 90 family and works in heavy transfer duty. Here's how to tell it apart from 290, 294 and 296 – and how to photograph it properly.
ClassMaK G 1206
The MaK G 1206 is a four-axle centre-cab locomotive for freight and heavy shunting duties – and turns up almost everywhere on private railways.
More operators
Oiltanking Tanklager Waltershof
Oiltanking Tanklager Waltershof stands for rail traffic at a tank farm site. Anyone documenting such trains should above all be able to read the dangerous goods markings on the tank wagon.
FreightTranspetrol GmbH
With the name component Petrol, Transpetrol points to the petroleum sector. This page explains how to tell tank wagon types apart and how to record sightings properly.
FreightChemion Logistik
Chemion Logistik carries its business area in its name: rail and logistics services in the chemical sector. Such traffic is chiefly recognisable by its tank wagons.
FreightEmsländische Eisenbahn
The Emsländische Eisenbahn is a regional railway company in the Emsland area of north-west Germany. The place name in its title reveals its business model: services across the region, not on the main line.
FreightEnergy Rail
Energy Rail is a German railway company with an English-language company name. This page shows what can be credibly derived from that – and where interpreting the name stops.
FreightEuropean Train Service (ETS)
European Train Service is a railway company with an internationally styled name. This page explains how to recognise vehicles built for cross-border use.
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