Purity Aluminum 12mm 30ft HNO3 Container Tanks for Transport Nitric Acid 98% Concentration 

TRANSPORTING NITRIC ACID ON ROADS

HAZARDS AND CLASSIFICATION OF NITRIC ACID

 

Purity Aluminum 10mm Tank)
 ISO 30ft Nitric Acid Tank ( HNO3 aluminium 30Feet Tank Container 81002 UN)( Chemical Storage or Road Transport Tank)
 Container used for transportation of nitric acid concentration %98
· With volume 20-22 m3/container
· Complete of manhole, inlet, discharge pipes and all gauges
· The container complete with steel stand and support
Tank body is made of industrial high-purity aluminum thickness 12 mm and a discharge valve of C4

1. Bottom openings

Road tankers for transporting nitric acid with an acid content below 70% may have openings and valves below the level of the liquid. In this case, the haulier must demonstrate, prior to loading, that the tank material, the fittings and the seals meet the requirements for nitric acid duty (See Annex 2).

 

Road tankers with no openings and valves below the liquid level are preferred for transporting nitric acid with an acid content of 70% or more. However, there may be good reasons for using tanks with openings and valves below the liquid. For example, the consignee may use gravity for unloading. A special risk assessment must be carried out when a tank with openings and valves below the liquid level is used. In addition the following points must be followed:

• The haulier must check the maintenance of the valves on a regular basis and inform the producer of each check.

• The producer must check all closing devices for tightness. This applies in particular to the bottom and discharge valves.

 

2. Materials

Tanks to contain nitric acid below 70% concentration must be made of special steel which is resistant to nitric acid. Suitable materials include:

V2A DIN/EN 1.4306 UNS S 30403 (AISI 304L), DIN/EN 1.4541 UNS S 32100 (AISI 321)

DIN/EN 1.4550        UNS S 34700 (AISI 347)

DIN/EN 1.4465 UNS S 31050.

Antinite DIN/EN 1.4361 UNS S 30601 (recommended for concentrations above 85%).

Warning! Materials DIN/EN 1.4301 or 1.4401 = UNS S 30400 or S 31600 (AISI 304 or

316) are not suitable for nitric acid tanks and should be avoided.

 

All hoses carried must be made from a material which is resistant to nitric acid. Suitable materials include polytetrafluoroethylene (PTFE) and polypropylene (PP), subject to the application (e.g. acid strangth, temperature, required service file). Hose

connections must also be compatible with nitric acid (e.g. stainless steels listed above).

 

Each road tanker must have written confirmation from the haulage company showing that the correct materials have been used for the tank and appendages, hoses, gaskets and bolts.

 

 Pumps

Pumps can be used for both loading and unloading nitric acid for transport. Standard chemical pumps made of the usual materials; (for example DIN/EN 1.4408 UNS I 92900 (ASTM A 296 grade C78M) may be used for nitric acid with a concentration up to 70%. Magnetically coupled side-channel pumps made from Antinite, material DIN/ EN 1.4361 UNS S 30601 or compressed-air diaphragm pumps made of a PTFE/TFM composite are recommended for highly concentrated nitric acids above 70%.

 

3. Design and construction of tank containers

Isotanks may be used for transporting nitric acid by road, rail, sea or inland waterways. They must meet the requirements of the appropriate national or international provisions for design and construction, depending on the specific type of transport to be used. Material compatibility must be ensured by means of a suitable coating. The suitability of the tank container must be verified by comparison with the certificates issued by the responsible authority, or be confirmed by the owner prior to loading.

 

In addition to the requirements above, tank containers without openings below the liquid level are recommended for nitric acid with a concentration above 70%.

 

4. Design and construction of inland waterway tank vessels

Inland waterway tank vessels for transporting nitric acid on the Rhine or on German waterways are subject to the requirements and building regulations of the ADNR. In addition, the regulations of the Rhine Navigation Investigation Authority and the Rhine Navigation Police Authority must be complied with.

 

Waterway tank vessels conveying nitric acid must have been issued with an individual approval certificate. The approval certificate must confirm that the vessel has been examined and the construction and equipment are suitable for transporting nitric acid. The approval certificate is issued by the responsible authority of a Riparian State of the Rhine or of Belgium, based on an examination carried out by an expert nominated by the said authority. The responsible authority may waive a vessel examination if it is clear from the certificate of a recognised classification company that the construction and equipment comply with the regulations mentioned above.

5. PRODUCT TRAINING FOR DRIVERS OF ROAD TANKERS AND TANK CONTAINER VEHICLES AND FOR THE SHIPOWNER’S PERSONNEL

  General training requirements for road tanker drivers

National and international regulations on transporting dangerous goods (for example ADR) stipulate that all drivers of road tankers or transport units transporting dangerous goods in permanently connected tanks, or attached tanks with a total volume of more than 3000 litres, must prove that they have taken part in a special training course   for the transportation of dangerous goods in tanks. The ADR certificate is proof of participation in such a special training course and of having passed the examination set by the competent authority.

 Specific requirements for nitric acid road tanker drivers

The dangerous properties of nitric acid are the corrosive hazards, the oxidizing effect and the release of hazardous fumes. The consignor should train the vehicle drivers employed on the hazards associated with nitric acid. Drivers of vehicles carrying dangerous goods in fixed or demountable tanks, with a total capacity exceeding 1000 litres and drivers of vehicles carrying dangerous goods in tank-containers with an individual capacity exceeding 3000 litres on a transport unit, shall hold a certificate issued by the competent authority.

 

The vehicle drivers must be familiar with the particular hazards  associated  with nitric acid and, from this knowledge, understand the recommended relief and safety measures to be taken in an emergency. Annex 3 includes recommendations on the content and scope of the training courses for vehicle drivers and how they should be carried out.

 

Drivers of vehicles carrying dangerous goods in fixed or demountable tanks, exceeding 1000 litres and drivers of vehicles carrying dangerous goods in tank-containers with an individual capacity exceeding 3000 litres on a transport unit, shall hold a certificate issued by the competent authority. The purchaser of a consignment of nitric acid transported by road tanker or tank container vehicle must require that the haulier use only vehicle drivers who have received special training  for the transportation     of nitric acid. The haulier must ensure that such vehicle drivers repeat the training course every two years and that they carry their training certificate with them when transporting nitric acid.

6. PROTECTIVE CLOTHING AND PERSONAL SAFETY EQUIPMENT

Technical and organisational methods should be taken which limit the direct handling of acid to that which is absolutely essential in order to protect employees handling nitric acid or highly concentrated nitric acid.

 

For example, product releases must be anticipated when transferring nitric acid (by ship, tank wagon or road tanker) or during work such as emptying or flushing hoses repair and reconstruction work, operating fittings and starting pumps.

 

The type and scope of  protective  clothing  and  personal  safety  equipment  must be stipulated to correspond with the risk of possible release and depending on the concentration. Possible items of safety equipment are:

• full-body coverall (chemical coverall) or chemical protective suit

• sturdy shoes or acid-resistant boots

• closed protective glasses or visor with full mask

• helmet or helmet with neck guard

• acid-resistant protective gloves

 

The specific  protective  clothing  and  equipment  to  be  used  must  be  stipulated  in substance-related and workplace-related company rules. For example, recommendations may be found in the safety data sheets.

 

Vehicle drivers who transport nitric acid by road must carry the protective equipment which is specified in the TREM card for road traffic, readily available in the vehicle. This also applies to the transport of empty tanks which last carried nitric acid and which have not yet been cleaned.

7. Tightness of the tanks

Close all the valves, openings and shut-off devices which are not needed for the filling operation, properly before filling. Take suitable measures (for example, extraction, gas displacement) during the loading of the tank with consignments of nitric acid to prevent the release of gases and vapours.

 

Check the tank and especially the rising pipe, for tightness during the filling operation.

 

Close all closure devices properly after filling so that none of the contents can leak out unnoticed. Close all openings and valves with protective caps and blind flanges wherever present. Replace missing nuts and bolts on all tank wagons, before transportation. Secure hand wheels or hand levers against unintentional opening.

 

Check all the closure devices including openings and valves not used during filling, for tightness. In particular, visually inspect the rising pipes, bottom and discharge valves for tightness.

 

Tanks containing nitric acid with a concentration above 99% must be inspected for tightness after filling or before transportation begins. After attaching the blind lids to the nozzles and fittings, apply compressed air at a pressure of at least 0.5 bar and     at most 2 bar (preferably 1 bar). The apparatus for this purpose must be fitted with devices which permit the test pressure to be set, held and observed and which prevent the setting of any pressure above the permitted operating pressure (Figure 4).

 

Hold the test pressure for at least 15 minutes. Check all the flanges and fittings during this time. This can be done using a leak detector spray or ammonia gas (Figure 5). Ammonia gas is particularly suitable because it forms an ammonium nitrate mist which is easily visible with very small quantities of nitric acid vapours, thus detecting even the smallest leaks. Relieve the container to atmospheric pressure after the test. Extract and wash the pressure relief gas. If no leaks are detected, seal the pressure nozzle, after pressure relief and closure of the valve, with a blind lid with an exchangeable seal. If a leak is detected, relieve the container pressure as described, rectify the leak and carry out a second leak detection test.

 

There are various causes of leaks:

• missing seal

• incorrect seam

• defective seal

• bolts not tightened sufficiently

• damaged sealing surfaces

If the leak cannot be rectified for the reasons given above, empty the tank at the filling site, rinse and remove the cause of the leak.

UN No 2031