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Home / Industries / Bulk Chemical Loading / Ammonium NitrateAmmonium Nitrate (NH4NO3) Handling Design, Loading, and Installation.
Although no two Ammonium Nitrate Loading solutions will be identical, the product itself determines much of the critical design criteria that will ensure optimum safety and productivity can work together in harmony.
What is Ammonium Nitrate? Ammonium nitrate is a white crystalline solid comprising ions of ammonium and nitrate. It is highly soluble in water and typically transported in an aqueous fashion. Ammonium nitrate is primarily used in the making of fertilizers and explosives. Other uses include rocket propellants, pyrotechnics, herbicides, insecticides, and in the manufacture of nitrous oxide (laughing gas.)
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View Full TextYour Project
Typically, as a starting point, we will need to know answers to these questions for your project
- The Railcar connection locations need flexibility – Do you know what the breadbasket connections look like?
- Are you using liquid and vapor arms/hose as two separate devices or a piggyback arm?
- Is the loading station indoors or outdoors?
- Is the loading area temperature controlled?
- How are you going to spot your railcars
Our highly trained technical sales team will undertake a detailed site survey prior to undertaking any work to check and clarify all dimensions, obstructions, access issues and other salient points. Our challenge is to provide the safest working environment – protecting operators and the equipment – while simultaneously enabling you to improve throughput and productivity.
Your Project Needs
Whether you are looking for a turn-key installation, on-site supervision or a maintenance program, SafeRack is positioned to assist you. We can do as little or as much as you need. Our project management and supervision team is the best in the business at supporting your company’s needs.
- Collaborative Design – Our loading platform specialists will work with you one on one, if you design to design the best loading solution for your specific needs
- Contract review – drawings and associated documents relating to the contract prior to site arrival
- Risk Assessment – Undertaking a site risk assessment
- Shipment Inspection – Detection of any shipping damage or abnormalities
- Material Receiving – Supervised off-loading and transport at site
- Installation Management – Supervised Installations and Coordination
- Start-up & Commissioning – On-site training for both users and maintenance personnel
Loading Arms
Generally speaking, SafeRack recommends rigid pipe loading arms where possible for the following reasons:
- Balanced throughout their movement envelope
- Designed not to hit the ground – protecting the asset and the operator
- Ergonomic – one man operation
- Fitted with manual or actuated valves.
- Fitted with optional purge/vent facilities
- Can be moved into position with ease and left hanging in the air while the operator prepares the tanker connection
- Parked neatly
Hoses require:
- Annual pressure test
- Are difficult to stow neatly when not in use
- Can be dropped
- Can be driven over
- Are very heavy to use if fitted with a valve at the tanker connection point
- Cannot be easily heated or have vent/purge valves fitted to it
- Prone to catastrophic failure
Ammonium Nitrate is typically shipped in 26,000 gallon DOT-105 insulated tank cars with safety valves. The rails cars themselves are ~ 9′ outside diameter with an overall length of ~45’ to 50′, with a 6’ x 6’ center opening or off-set crash box openings.
In the United States, Ammonium is a “tight-fill” (closed-loop) loading operation and is loaded into rail cars via chemical hoses or 3” stainless steel loading arms. Ammonium Nitrate, if not handled properly can cause serious injuries and Personal Protective Equipment (PPE) is required. Additionally, because operators are on top of the vehicles during the loading process, robust, well-designed fall prevention is essential to ensure increased throughput, without compromising operator safety.
Tank truck (un)loading procedures are similar to railcar applications with the trailers meeting established DOT requirements for transporting Ammonium Nitrate or other like commodities. Approved DOT trailers include MC 307 or low pressure chemical ISO containers. Trailers are typically bottom unloaded. An extension pipe with two valves is flanged to the top of the trailer.
All trailers must be equipped with pressure relief valves; and trailers with bottom outlets must be equipped with remote controlled stop valves.
Typical Ammonium Nitrate Loading Platform
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Below are some of the loading and unloading solutions for illustrative purposes only. Our experts will work with you and your team for a custom solution to suit your needs.
Ammonium Nitrate Loading Arms
Ammonium nitrate is typically loaded into railcars or tank trucks via boom supported stainless steel loading arms or chemical hoses with a flange connection. The arm or hose will have a top inlet with a control valve to ensure that it is self-draining after use and is supported along the length of a mechanical loading arm to improve handling; this is known as a by-pass arm. You can install one liquid and one vapor arm, or mount both the liquid and vapor hoses on one by-pass arm. For unloading, typically you would use a rigid stainless steel self-draining loading arm with Buna-N, EPDM, FKM or Kalraz seals. Purge lines can be fitted to the arm, for nitrogen purging. Additional features such as parking latches with proximity sensors can be incorporated into the total system to ensure the arm is correctly stowed when not in use, before any rail movement can occur. Loading Gangways and Safety Cages
A wider access gangway (48″-60″ is preferable) as it helps improve access and egress to and from the vessel. In addition, a wider gangway will reduce the risk of the operator’s PPE getting caught, torn or damaged, and will improve productivity and safety. Powered gangway solutions are also an option, with both hydraulic and pneumatic solutions being commonly used. Each gangway will be fitted with a two-rail safety cage for the railcar crash box. This will be a centered 6’x6’ safety cage to sit directly over the cashbox. This will provide a safe, secure work environment for your operator when connected to their breathing apparatus.
SafeRack’s GX SAS gangways use Retractalok power-assist technology allowing operators to raise or lower effortlessly, light as a feather to lift, and solid as a rock. Tested in the most critical applications, this revolutionary new gangway outperforms all others. Available in multiple lengths and widths.
Learn MoreMAXRack Elevating Safety Cage
As an alternative to our two and four-rail safety cages, some customers prefer our MAXRack elevating safety cages. The ultimate fall prevention solution engineered to keep operators safe and productive. Designed for both trucks or railcars, and available in multiple cage lengths and widths. Safe, durable, and easy to use. MAXRack is built rock-solid with galvanized steel column supports and lifting arms (cages can be Aluminum, Galvanized, or Stainless Steel depending on application) Available in two power options – Pneumatic Air Drive and Electric Drive (Explosion and Non-Explosion Proof).
Learn MoreAmmonium Nitrate Eye Wash/Drench Showers
ANSI guidelines state that an Eye Wash/Drench Showers need to be located 10 seconds or 55’ (16.8m) from contaminants or hazardous materials. Eyewash stations need to be on the same horizontal plane with no obstructions.
Therefore, we would propose the installation of a standard combination Drench Shower/Eyewash Unit, which will save limited space and fit easily into any work environment.
Ammonium Nitrate Spill Containment
Spill containment pans will be provided at the point of loading operations and is an essential piece of equipment in overall site safety and environmental protection. Ammonium Nitrate Grounding
Ammonium nitrate is combustible and can cause an explosion if not handled properly. Industry best practice includes the grounding of all vessels before starting the (un)loading process. - Vehicle grounding and bonding — ensure true grounding before product flow is permitted
- Explosion-proof enclosures — meet or exceed UL, CSA, and Ex requirements
- Non-sparking tools are also recommended while working around this product
Ammonium Nitrate Safety Gates
Safety Gates will be installed at the top of stairs and any other openings to ensure operator safety at all times. YellowGate Safety Gates
SafeRack’s line of industrial safety gates is the most flexible product on the market with the ability span openings between 16” and 36” and is field adjustable with nothing more than a wrench. Learn More
Ammonium Nitrate Options
- Lighting – Lighting both over and under the platform will be provided. For overcast days or second shift, lighting is essential for improved safety and improved productivity.
- Platform & Canopies – Full platform canopies reduce exposure to the elements and improve the safe and productive loading operation from the operator’s perspective.
- Operator Shelter – Depending on your site requirements, consideration should be given to the requirement of an operator or guard building on the loading platform. This can be customized to meet specific site requirements
- Wheel Chocks – Railcar Wheel Chocks provide fast blocking of all types of railcars and meet OSHA regulations to safely prevent railroad cars from moving during loading or unloading operations. This is a requirement by the Department of Homeland Security
Personal Protective Equipment PPE Requirements
Eye/Face Protection: Wear chemical safety goggles. A face shield (with safety goggles) may also be necessary.
Skin Protection: Wear chemical protective clothing e.g. gloves, aprons, boots. Coveralls or long sleeve shirts and pants in some operations. Wear a chemical protective, full-body encapsulating suit, and self-contained breathing apparatus (SCBA). Suitable materials include: butyl rubber, neoprene rubber, Viton®, Viton®/butyl rubber, Barrier® – PE/PA/PE, Silver Shield® – PE/EVAL/PE, Trellchem® HPS, Trellchem® VPS, Saranex®™, Tychem® BR/LV, Tychem® Responder® CSM, Tychem® TK. The following materials should NOT be used: natural rubber, polyvinyl chloride. Recommendations are NOT valid for very thin neoprene rubber gloves (0.3 mm or less).
Respiratory Protection: Up to 5 ppm:
(APF = 10) Any chemical cartridge respirator with cartridge(s) providing protection against chlorine*; or Any supplied-air respirator*.
*Reported to cause eye irritation or damage; may require eye protection.
APF = Assigned Protection Factor
Recommendations apply only to National Institute for Occupational Safety and Health (NIOSH) approved respirators. Refer to the NIOSH pocket guide to chemical hazards for more information.
Use a local exhaust ventilation and enclosure, if necessary, to control the amount in the air. Consider using a corrosion-resistant exhaust ventilation system separate from other ventilation systems. It may be necessary to use stringent control measures such as process enclosure to prevent product release into the workplace. Use backup controls (e.g. double mechanical pump seals) to prevent the release of this material due to equipment failure. Customer Reviews
5 5The SafeRack team went above and beyond even after the sale.I wanted to drop you a line in regards to a new railcar access structure Croda purchased from Saferack. In my 25 years as a chemical engineer I have purchased numerous racks and fall protection equipment from a number of suppliers. By far, with no exception, have I ever dealt with a more professional customer oriented company than yours. Ray Evans and Charles Phillips spent much time convincing me to purchase(both equipment and installation) from Saferack. Unlike most sales people, they did not forget about me after winning the order. They, as well as your design team,endured several revisions driven by me and in the end we came up with a great design. Linda Hardee has been the most responsive customer service person I have ever worked with. She has worked very hard to provide me everything I have needed. Whenever I needed data, drawings, schedules, contractor approvals, insurances, permits, etc – a reply from her was always very prompt. Last, but not least, I need to praise the installation team. I was a little concerned when only two old guys, Richard Hester and David Gunny Smith showed up on site to install this big structure. These two gentlemen methodically erected this structure, efficiently, safely, and in 90 degree weather to boot. In my 25 years of construction, I have never seen more knowledgable, trained, properly documented, and safety conscious personnel than Richard and Gunny. With the folks you have on board I have no doubt your company has a bright future. If I am in a position to make future purchases in this industry, I know who I am going to call. Thank you for a great product and exceptional service.
By Bob Cooney from Croda on 10/28/104 5I simply place the order and everything else is taken care of.I just want to say how great everyone at SafeRack has been to us since we started using them for our gangways. Dana Hamor, Tom Semiklose and John Edwards have been very, very helpful and always respond quickly to my calls or e-mails and I have no doubt that everyone at SafeRack is just as great as they have been to me. The purchasing of a great quality gangway is not a problem anymore. I simply place the order and everything else is taken care of.
By Robert Parras from Buzzi Unicem on 11/16/115 5All products were delivered on schedule.Both Chris Hite and Rangeley Laney were very responsive and sensitive to my needs. All products were delivered on schedule even though I had a rush order on non-stock, back-ordered products.
By Lee Thornton from Precision Approach on 12/14/114 5Helped get me out of a jam!I like the railcar mover because it was not some little tool to work with, the size of the handle and the head make it easy to move cars. Follow-up on the order and quick delivery helped get me out of a jam! Thanks.
By Operations Manager from Coal Facility in West Virginia on 1/4/115 5This is a quality product at a good price with quick delivery.Excellent salesman response. David Daniel responded with a quote within a few hours of the initial inquiry. This is a quality product at a good price with quick delivery. Your MAUI system increased our safety level, productivity, and added a more professional appearance to our truck unloading area. The entire process was smooth and easy. We are happy with our purchase.
By Mike Siegel from IMTT - Geismar on 9/12/135 5Single Railroad Wheel Chock FlushSafeRack provided great communication and follow up from all parties.
By NK Gilbert from Marathon Pipe Line LLC on 5/26/20MAJOR AMMONIUM NITRATE PRODUCERS WHERE WE HAVE SUCCESSFULLY EXECUTED AMMONIUM NITRATE LOADING PROJECTS
Ammonium Nitrate 101
Things to know about Ammonium Nitrate
Ammonium Nitrate is regulated by the U.S. Department of Transportation (DOT) and is classified as an explosive and hazardous material with the DOT identification number UN 2426.
Ammonium nitrate is used widely in the manufacture of synthetic fertilizers and explosives. Commercial grades of ammonium nitrate contain approximately 34 percent nitrogen all of which is in forms utilized by plants. Ammonium nitrate is also used to modify the detonation rate of explosives, such as nitroglycerin, or as an oxidizing agent in ammonals, which are mixtures of ammonium nitrate and powdered aluminum. Ammonium nitrate doesn’t burn on its own; instead, it acts as a source of oxygen that can accelerate the combustion or burning of other materials.
Only properly trained and equipped personnel should be permitted to (un)load ammonium nitrate tank cars and tank trucks. Operators should wear approved PPE equipment including impervious clothing, footwear, gloves, and goggles.
Under normal handling conditions, ammonium nitrate is not harmful. However, inhalation of high concentrations of dust or mist can cause respiratory tract irritation including coughing, shortness of breath or even suffocation. Use only outdoors, or in a well ventilated area.
First aid measures for exposure include – removing operators from the source of exposure and into fresh air. Remove contaminated clothing immediately; wash skin thoroughly with soap and water; flush eyes with tepid water for 15 minutes. If ingested do not induce vomiting, but immediately call your local poison control center. Aspiration into the lungs can cause fatal chemical pneumonitis. If ingestion has occurred, assume there is a risk of aspiration into the lungs.
Ammonium nitrate has a melting point of 337 degrees F (169.6 C). It is highly soluble in water; heating of the aqueous solution decomposes the salt into nitrous oxide.
Since solid ammonium nitrate can undergo explosive decomposition when heated in a confined space, strict government regulations have been imposed on its shipment and storage.
Ammonium nitrate is corrosive to most metals including bronze, brass, carbon and milled steel, so great care should be taken to avoid contact with these materials. However, aluminum and stainless steel have little to no effect when exposed to Ammonium nitrate.
Is your plant or facility compliant with ANSI, OSHA, and local safety codes? We can help!
EMERGENCY EYEWASHES / SHOWER EQUIPMENT AND THE ANSI/ISEA Z358.1 – 2014 STANDARD
Following eye contact, you must start washing with water immediately to prevent permanent damage. In the event of skin contact, you must start washing with water immediately to prevent slow-healing chemical burns.
Are you aware that ANSI guidelines state that Eye Wash/Drench Showers need to be located 10 seconds or 55′ from contaminates or hazardous materials and located on the same horizontal plane, with no obstructions? If bottom loading/unloading, an additional shower should be located at grade as well. SafeRack provides the above equipment plus much more needed to keep employees safe and expedite bulk chemical loading and unloading.
OSHA Regulation Experts – Does your existing chemical safety equipment or chemical loading systems meet OSHA’s latest requirements? SafeRack’s professional technical sales consultants are available to meet with your team to make recommendations to keep your facility in front of OSHA’s ever-changing country and region-specific standards and regulations, including lifeline and trolley beam fall arrest systems, metal stairs, and access platforms.
Why SafeRack?
The SafeRack approach is a collaborative one. Let’s call it The SafeRack Way. We have, over many years amassed a great deal of experience and understanding of the safety aspects involved in loading road tankers and railcars, as well as the behavioral habits of the operators.
Experts In Chemical Loading
- Acetic Acid
- Acetic Anhydride
- Acetonitrile
- Acrolein
- Acrylic Acid
- Acrylonitrile
- Aluminum Chloride
- Aluminum Sulfate
- Ammonia
- Ammonium Hydroxide
- Ammonium Nitrate
- Aniline
- Benzene
- Benzyl Chloride
- Bromotrifluoromethane
- Butadiene
- Carbon Dioxide
- Caustic
- Chlorine
- Chloroform
- Chlorosulfonic Acid
- DEF (Diesel Exhaust Fluid)
- Diethylene Glycol
- Dimethylformamide
- Dodecylbenzene Sulfonic Acid
- Ethanol
- Ethyl Acetate
- Ethyl Chloride
- Ethylene
- Ethylene Dichloride
- Ethylene Glycol
- Ethylene Oxide
- Ferric Chloride
- Ferrous Chloride
- Hexane
- Hydrochloric Acid
- Hydrofluoric Acid
- Hydrofluorosilicic Acid
- Hydrogen Cyanide
- Hydrogen Peroxide
- Hydrofluoric Acid
- Hypochlorous Acid
- Isopropyl Acetate
- Liquid Argon
- Liquid Nitrogen
- Liquid Oxygen
- Maleic Anhydride
- MDI
- Methanol
- Methyl Chloride
- Methyl Ethyl Ketone
- Methyl Methacrylate
- Methyl Isocyanate
- Molten Sulphur
- Nitric Acid
- Oleum
- Phenol
- Phosphoric Acid
- Phosphorus Oxychloride
- Phosphorus Trichloride
- Polypropylene
- Renewable Diesel
- Sodium Cyanide
- Sodium Hydroxide
- Sodium Hypochlorite
- Styrene Monomer
- Sulfuric Acid
- Sulfur Dioxide
- Titanium Tetrachloride
- Toluene
- Toluene Diisocyanate
- Turpenitne
- UAN (Urea Ammonium Nitrate)
- UREA
- Vinyl Acetate
- Vinyl Chloride
- Xylene
- Zinc Chloride
- Agro-Chemical
- Specialty Chemical
- Petrochemical
North America’s largest loading terminal
World-leading designer, manufacturer, and installer of truck and railcar loading platforms
As one of the primary railcar loading points, Hardisty is one of the major crude oil hubs in North America and a major origination point of pipelines that export to the United States. SCS was asked to supply and construct a SafeRack crude oil loadout terminal spanning nearly half a mile. The USD Hardisty terminal can load up to two 120-railcar unit trains per day and consists of a fixed loading rack with 62 railcar loading positions enclosed, separate control, operator, and mechanical buildings, as well as a unit train staging area and loop tracks capable of holding multiple unit trains simultaneously. SCS also supplied and installed boom-supported loading arms with supply and vapor management systems.


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