Nitric Acid - Bulk Chemical Loading

29 Apr.,2024

 

Nitric Acid - Bulk Chemical Loading

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

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 More

MAXRack 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 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

Railcar spill containment and track pans

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

Nitric acid - Jewelry Discussion

 I am trying to decide what to do with the nitric acid that I now
have.  As a last ditch effort in deciding what to do with the
acid, I am seeking advice from the forum. 

Susan, the acid, if handled properly is as benign as a lump of coal,
but not handled correctly it can be quite a problem.

There are rules for handling acid and dilution with water. Wear a
rubber splash apron, and a face shield. Always add water to the
acid, vs the opposite as you can end up a violent reaction. Good
ventilation is a must. The fumes from the etching are not good for
your lungs. When working with the acid, use the appropriate
precautions, and you will not have any problems. Keep a large box
of baking soda around to neutralize any splashes and spills. Mix
only the least amount you will need for the project at hand. After
the project is complete, neutralize the solution you used for the
project and dispose of it safely. As to keeping the acid in
freezing temperatures, someone else on the list need to respond to
this. The old Bovins books as well as others give a good deal of
useful info on using Nitric acid for etching.

One more item, I would use only distilled water when working with
the acid. That gives you one less variable in the solution.

I used to have a HP Pin Plotter that I used for engraving the work
with the fonts I wanted onto a piece of silver. I made a pin with a
sharp point to replace the ink pin. I attached a piece of flat
silver stock to card stock paper using double stick tape, after
first using fingernail polish, coating the silver with complete
coat. I would set up the design using Freelance or Power Point and
then print it to the silver plate. You could let your imagination
run away, but you had to think 2D. Once the silver plate was
engraved with the plotter, I then etched it with the Nitric Acid
solution. It worked great. The plotter didn’t have the beef to
directly engrave the silver, but it could remove the fingernail
polish with very good precision, allowing for a precise etching.

I donated my plotter to the local High School a couple years back
but I now think I made a mistake. I’ve got a couple projects I
could use it for now.

Don

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