Loss Prevention Guidelines for PTA Cargo in Bags

2/13/2025 2:05:16 PM

Before loading PTA (Purified Terephthalic Acid) in bags onto a vessel, the cargo holds must be meticulously prepared to ensure that the product remains in optimal condition during transit. Here are the key requirements for preparing a vessel’s cargo holds:
• Cleanliness:
The cargo holds must be thoroughly cleaned and free of any residues from previous cargoes, especially if they were chemicals, fertilizers, coal, or other materials that can contaminate the PTA. The holds should be swept, washed, and, if necessary, steamed to remove dirt, dust, grease, or oil residues. No traces of rust, paint flakes, or any foreign particles should be present that could contaminate the bags.

• Dryness:
The holds must be completely dry before loading PTA. Moisture is one of the main threats to PTA as it is hygroscopic. Any presence of water, condensation, or high humidity in the hold can cause the PTA to absorb moisture, leading to clumping or caking. After cleaning, ensure proper ventilation to dry out the holds. Desiccants or drying agents may also be used to absorb any residual moisture.

• Odor-Free Environment:
The holds must be free from any unpleasant odors. Strong odors can penetrate the packaging and compromise the quality of PTA. Odor control involves thoroughly airing out the holds and avoiding any chemical agents that might leave behind residual smells.

• Inspection:
A visual inspection of the holds should be conducted before loading. This includes checking for structural integrity, ensuring no holes, leaks, or cracks that could expose the cargo to seawater, rain, or external contaminants. Inspection by a certified marine surveyor is often required to verify that the holds meet the cleanliness and preparation standards.

• No Use of Insecticides or Chemicals:
Avoid using fumigants, insecticides, or any chemicals in the cargo hold before loading PTA, as these substances can seep into the bags and compromise product quality.

• Ventilation:
Proper ventilation should be in place to control temperature and humidity within the cargo hold, especially during transit in varying climates. However, it is important to prevent the ingress of moist air that could lead to condensation.

• Protection Against Mechanical Damage:
The cargo holds should be prepared to avoid any mechanical damage to the PTA bags. Install protective linings or dunnage on the hold floors and sides to minimize friction, tearing, or puncturing during loading and unloading operations.

• Hatch Covers:
Ensure that hatch covers are watertight and in good condition to prevent the entry of water during transit, which could damage the PTA bags.

• Pallets and Dunnage:
If using pallets, they should be clean, dry, and free of splinters, nails, or any elements that could damage the bags. Additionally, dunnage (wood or plastic sheets) should be used to separate and protect layers of bags. Proper preparation of the cargo holds is critical to maintain the integrity and quality of PTA during transportation. Following these guidelines helps prevent contamination, moisture absorption, and physical damage to the bags.