Complete Installation Guide to Using Desiccants in Shipping Cargo Containers

When it comes to shipping cargo containers, safe-guarding your goods from the damage of moisture cannot be ignored. In order to ensure that they arrive in best condition. Humidity can be a silent natural disaster, leading mold, erosion, decomposition, and expensive problems.

The solution? Container desiccants — your first stroke of protection from unwelcome dampness.

Whether you use shipping container desiccants, desiccant bags for export containers, or desiccant strips installation throughout the transit process, your goods is protected by these functional moisture absorbers. Serving as an imperceptible barrier, they guarantee that your shipment stays dry, fresh, and maintains its structural soundness.

Even as an exporter, grasping the correct desiccant usage guide for exporters can save you time, money, and avoid shipping headaches. In this ultimate installation guide, we’ll walk you through everything you need to know about selecting the right desiccant bags, placing them for extreme efficiency, and maintaining their functionality — assuring that the goods reach their destination safe and sound.

The Concern: Container Rain and Moisture Damage

A shipping container is a sealed metal box that is subject to extreme weather changes when transported from one ocean or continent to another. As the container heats up due to the sun exposure, moisture from the packaging supplies like cardboard boxes, even the air inside the container, evaporates. During the night when the temperature drops, the airborne moisture that has evaporated cools and forms droplets on the container.

This occurrence referred to as container rain can drip onto your cargo which can lead to many issues:

• Textiles, leather products, and even food stuff impacted by mold and mildew.
• Corrosion, rust, and other forms of damage to metal machinery, electronic devices, and components.
• Flour, cement, and spices affected by caking and clumping.
• Warping, deterioration of wood products, and deterioration of various paper products.
• Labels that are peeling as well as broken packaging seal results in loss in shelf appeal.

The problem can be effectively resolved by controlling the humidity in the container with the aid of a high-performance shipping container desiccant.

Step-by-Step Guide to Installing Desiccants in Shipping Containers

Installing desiccants in your shipping cargo containers is the most significant step to stop the building up of dampness leading to mold, erosion, and harm to your goods.

Here is a comprehensive guide to install desiccants and keep your cargo dry throughout transport:

Step 1: Inspect the Container before Loading

Before any cargo goes in, thoroughly inspect the empty container.

Look out for Gaps: Look for the container from inside and check for light or gaps entering via the walls, ceiling, or floor. Every indication suggests a gap that could allow water entry, hence requires fixing.

Review Door Seals: Confirm the rubber gaskets on the doors are sealed completely and working properly. A breach on the seal may let in damp air during the transit.

Ensure it's Dry: If the container is of wood flooring it definitely needs to be completely dry. Wash out the container right before loading it.

Step 2: Choose the Right Type of Desiccant

The right kind of desiccant depends on the cargo container and the nature of the goods.

Silica Gel is known for absorbing weight that is up to 40%. It is perfect for pharmaceuticals, electronics and dry products. It also functions well when the humidity is moderate.

Calcium chloride is known to absorb the weight up to 300%. It works best in marine and tropical environments. It is also apt for machinery and textiles. It is also apt for products in bulk.

These desiccants are available as Sorbipaks hanging Strips, poles, or sachets, peelable desiccant types and so on.

“Pick your desiccant with container size, cargo setup, and installation ease in mind.”

Step 3: Determine the Desiccant Quantity

The amount of desiccant needed is determined by many aspects: the size of the container, Cargo type, packaging materials, and the voyage's expected length and conditions.

For a typical 30- to 60-day journey, the usual rule of thumb is:

6–8 kg of desiccant (such 6–8 one-kilogram bags or 3–4 two-kilogram strips) fit in a 20-foot container.

16 kilogrammes of desiccant fit in a 40-foot container. This might be ten to sixteen one-kilogram bags or five to eight two-kilogram strips.

Increase the amount for:

Hygroscopic cargo: Including merchandise like botanicals. All such products like coffee beans, wood furniture, garments made of cotton, and paper products, absorb and release moisture.

Long-haul routes: Journeys that go beyond 2 months.

Routes through tropical zones: Regions having high moisture temperature.

Step 4: Distribute Desiccants Strategically

Neglecting proper desiccant placement causes them to be utterly useless. Proper placement and even distribution of container desiccant not only absorb moisture, but also mitigates the risk of container “rain,” thus preventing potential damage.

As an added bonus, remember to position the container desiccant at the corners for enhanced moisture collection. Some desiccant types feature modern hooks, ensuring they are effortless to install. Some have string like Cargo dry Pak , here is placement of desiccants video.

• Desiccant Poles/Strips: Hang vertically on the container wall using hooks or the container’s lashing rings. Keep them upright.
• Desiccant Bags/Pouches: Place or hang along the side walls, under pallets, or in gaps where air can circulate.
• Floor Placement (if used): Put them on pallets or dunnage, never directly on the floor to avoid damage.

Step 5:  Tighten the Container Carefully

When you place the desiccants:

You need to keep the doors of the containers closed at once so that moisture does not get into it.

At the time of transit, keep in mind not to open the container. Only in times of absolute necessity, the container can be opened.

Make sure to use the security seals so that the container does not remain loose.

The efficacy of desiccant enhances when the container is sealed tightly. In addition, a well-sealed container keeps external humidity away from getting into the container. The humidity absorber for shipping can keep the container intact. It does not let humidity enter.  

Step 6: Keep Tabs On Conditions: (It is not mandatory, but it is recommended.)

For highly sensitive cargo, make sure to use:

Humidity indicator cards that are simple can be availed at budget-friendly rates.

Smart sensors are some desiccant systems that are available with monitoring equipment. It is essential to know that monitoring helps provide desiccant performance. It also offers documentation for providing quality insurance.

Electronic data loggers are used to keep tabs on temperature. 

Best Practices for Desiccant Use

Do:

• Select desiccants depending on the kind of cargo and weather.
• With the help of manufacturer recommendations, you can analyse quantity precisely.
• When boxes are opened, all the Pieces of desiccants don't open to the atmosphere; as per the requirement, they must open.
• When the container is being stuffed, Desiccants must be placed as it is being filled; They Should not stick all together.
• The best placement time for the cargo desiccant and container filling is before 11 am and after 4 pm.
• Dole out desiccants consistently all over the container.
• Close the container straightway after installation. Don't forget to place a desiccant in the door, also.
• For flammable or chemical items, open an Air vent

 Don’t:

• It is not advised to place desiccants straight on cargo.
• Desiccants can be used again from preceding shipments.
• Overlook container impairment or leaks.
• Undervalue the significance of positioning and sealing.
• Stop Moisture Damage Before It Starts!

Bottom Line

Incorporating this desiccant usage guide for exporters into your standard operating procedures mitigates the risk of moisture damage considerably. The small cost incurred with quality shipping container desiccants is more than offset in the value of your goods, the reputation of your brand, and the profits of your business.

FAQ

1) What is the best time to place cargo desiccants and fill the container?
The recommended time for both placing desiccants and filling the container is before 11 am or after 4 pm. During these hours, temperatures and humidity are usually lower, which reduces the risk of moisture entering the container and ensures desiccants work at their best.

2) Where to install desiccants in the container?

Place desiccants near ventilation, doors, and other moisture-prone places. Desiccant bags are best exposed to air by hanging them on vertical supports or near the ceiling.

3) What are the circumstances for desiccant storage?

The protective packaging allows for the preservation of the desiccant’s outer casing in conditions of 0° – 90°F (-17°C – 32°C) at 0% – 75% Relative Humidity (RH). Protective packaging for desiccants should be removed only until the time of use, whereupon, the desiccant is put into direct use.

4) How long does a desiccant remain effective?

Effectiveness varies by type and conditions but generally lasts for the duration of shipping, often from a few weeks up to several months. It’s important to monitor and replace desiccants if shipments are delayed.

5) Can desiccants be reused for multiple shipments?

Silica gel desiccants can be used by drying out and reused, nonetheless this needs correct renewal approaches. On the other hand, calcium chloride, are usually single-use. Always adhere to follow manufacturer directions for reuse.

6) How can I verify that desiccants are effectively working during transit?

Certain types of desiccants contain indicator beads that visually signal saturation by changing colour, thus providing a visual confirmation of moisture levels, affirming desiccation has taken place, or that a replacement is required.