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Although no two Nitric Acid (un)loading solutions will be identical, the product itself determines much of the critical design criteria that will ensure that optimum safety and productivity can work together in harmony.
Nitric Acid, also known as Aqua fortis and Spirit of Niter, is a highly corrosive mineral acid. Typically a colorless chemical compound, it can take on a yellow-ish tint over time due to the decomposition into oxides of nitrogen and water.
In the United States, Nitric Acid is a “tight-fill” (closed-loop) (un)loading operation and is loaded into rail cars via chemical hoses or 3” stainless steel loading arms. Nitric Acid 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.View Full Text
Nitric acid is typically shipped in 26,000 gallon DOT-103 rubber lined, insulated, or non-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.
Tank truck (un)loading procedures are similar to railcar applications with the trailers meeting established DOT requirements for transporting aluminum sulfate or other like commodities. Approved DOT trailers include MC 307 or low pressure chemical ISO containers. Trailers and ISO’s 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 Nitric Acid 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.
Nitric Acid Loading
Nitric acid is typically loaded into railcars or tank trucks via boom supported stainless steel loading arms or chemical hoses with flanged end connections. 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 self-draining stainless steel loading arm with Fluorocarbon (FKM), Kalrez, or PTFE 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.z
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
GX SELF-ADJUSTING STAIR (SAS) GANGWAY
SafeRack’s NEW GX SAS gangways use Retractalok power-assist technology allowing operators to raise or lower effortlessly, light as a feather to lift, solid as a rock. Tested in the most critical applications, this revolutionary new gangway outperforms all others. Available in multiple lengths and widths. Learn More
Nitric Acid 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.
Nitric Acid 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
Nitric Acid Grounding
Nitric acid is not combustible in a liquid form; however ferrous nitric acid dust can become combustible during handling and processing. 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
Nitric Acid 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
Nitric Acid 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. The use of a respiratory device to protect against the effects of fumes, dust and aerosol is also recommended.
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. * For illustrative purposes only. Our experts will work with you and your team for a custom solution to suit your needs
Customer Reviews4 5The staff was knowledgable and proficient and the product is very user friendly.
Across the board, the SafeRack G-4 models are the best gangway we have on site! We are pleased with the end product and easy to install. The price was very reasonable and beat out competitive quoting. I’d recommend these because the staff was knowledgable and proficient and the product is very user friendly.By Jason Stevens from Polychemie on 2/13/125 5The product was delivered within the week.
My salesperson was always responsive, within 24hrs of reaching out. The YellowGate is exactly what we were looking for.By JR Dunz from Healing Place Church on 11/15/164 5Went above and beyond.
Linda Hardee couldn’t be more helpful. Every question was answered promptly and accurately. Easy to work with. Product was delivered within two weeks of order. Sales department went above and beyond to get all the answers that were needed.By Tom Bright from The Press of Atlantic City on 9/11/124 5The product looks great.
Scott Hite was very responsive. The product looks great.By Jeff Rhude from Milk Specialties on 12/19/105 5Quality products and good response when issues arise.
Personally, I truly appreciate customer service. Many companies have similar products, they might be cheaper, better or worse. Regardless, it is always important to know that your sales engineer cares about your and your plant. Curtis and John have visited our plant multiple times, spoken with area supervisors as well as the operators (the most important ones). They have gained trust by showing quality products and good response when issues arise.By Sergio Maldonado from Western Refining Company LP on 12/30/155 5Good communication.
Good communication, Shane kept us posted… Requires less than 35 pounds to lower or rise. No pinch points. Meets OSHA/MSHA guidelines.By Hector Leal from CEMEX on 3/9/16
MAJOR NITRIC ACID PRODUCERS WHERE WE HAVE SUCCESSFULLY EXECUTED
NITRIC ACID LOADING PROJECTS
Nitric Acid 101
Things to know about Nitric Acid
Nitric Acid is regulated by the U.S. Department of Transportation (DOT) and is classified as an acidic, corrosive hazardous material with the DOT identification number UN 2031.
Nitric acid is a colorless, fuming, and highly corrosive liquid that is used in the production of ammonium nitrate for fertilizers, making plastics, and in the manufacturing of dyes. It’s also used for making explosives such as nitroglycerin and TNT.
Only properly trained and equipped personnel should be permitted to (un)load nitric acid tank cars and tank trucks. Operators should wear approved PPE equipment including impervious clothing, footwear, gloves, and goggles.
Nitric acid is dangerous to human health, and as a corrosive chemical, acute exposure can cause severe skin burns and eye damage. Do not breathe dust/fumes/mist/vapors as they can be fatal if inhaled. 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.
Best practice includes storing in a cool, dry environment in well sealed containers, and away from any oxidizing agents. Avoid storage near extreme heat, ignition sources or open flame.
Nitric acid is corrosive to most metals including aluminium, brass, carbon and milled steel, so great care should be taken to avoid contact with these materials. However stainless steel is an acceptable material of construction.
Nitric acid is highly reactive with alkalis and reducing agents. Hazardous decomposition by-products include – Nitrogen oxides (NOx)
Environmental precautions include preventing chemicals from reaching drains, sewer or open waterways.
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.
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
- Aluminum Sulfate
- Ammonium Nitrate
- DEF (Diesel Exhaust Fluid)
- Dodecylbenzene Sulfonic Acid
- Ethyl Chloride
- Ferrous Chloride
- Hydrochloric Acid
- Hydrogen Peroxide
- Methyl Ethyl Ketone
- Molten Sulphur
- Nitric Acid
- Renewable Diesel
- Sodium Hypochlorite
- Sulfuric Acid
- Sulfur Dioxide
- Titanium Tetrachloride
- UAN (Urea Ammonium Nitrate)
- Vinyl Chloride
- Specialty Chemical
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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Located in South Carolina
Located in South Carolina
Located in South Carolina
Located in South Carolina
Located in South Carolina