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Quality assurance specifications:
An outline
 
 
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The quality assurance specifications for the demanufacture of CFC-containing refrigerators and freezer appliances focus on the two main stages of refrigerator recycling. The first stage involves the collection and storage of the waste appliances, the second stage is concerned with their processing. The processing stage is itself further divided into Step I (extraction of CFC refrigerant from the cooling circuit), Step II (extraction of CFC blowing agent from the insulating material) and finally, the handling of the output material streams from Step I and Step II.

A fundamental principle of the demanufacturing specifications is that every waste appliance submitted for recycling is indeed subjected to each stage of the demanufacturing process.

Excerpts from the RAL Quality Assurance and Test Specifications:

1. Collection and storage:

Preventing the release of CFCs as a result of damage to appliances during transportation, delivery and storage
Compliance with the provisions of water management legislation
...

2. Processing

Step I

Joint extraction under vacuum of CFCs and refrigerator oil from the cooling circuit
Separation of the CFC from the oil
Compliance with stipulated minimum acceptable average recoverylevels
(115 g CFC R12 per appliance)
Measures to prevent process manipulation
...

Step II

Crushing, grinding or shredding of pretreated
appliances in an encapsulated facility
Complete separation of PU foam from casing material
Complete thermal desorption of CFCs from the PU foam matrix
Compliance with stipulated minimum acceptable
average recovery levels (283 g CFC R11 per appliance from a defined input stream)
Adherence to the strict limits imposed on the amount
of residual CFCs permitted in the PU foam, the exhaust air stream and in the water discharged from the processing plant
Compliance with a minimum purity level of 99 % for the CFCs recovered
...

Handling of the output streams prior to recycling or disposal

Separation and classification of the components and materials recovered during processing into recyclable fractions
Storage of the individual material fractions in accordance with relevant legal provisions in order to avoid environmental contamination
...

It goes without saying that compliance with all environmentally relevant statutory provisions and official regulations is a fundamental prerequisite of the RAL Quality Assurance and Test Specifications. Equally self-evident is the fact that all input and output material streams are fully documented.

Download Quality Assurance and Test Specifications (pdf)

 

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