HG/T 2624-1994Microporous Styrene Type Weak Basic Anion Exchange Resin D 301-FC (English PDF)

5.8 Determination of effective particle size and uniformity coefficient

The determination shall be conducted using the method specified in GB/T 5758.During the sieving process, the screen shall be backwashed with water 3~5 times.

5.9 Determination of osmotic-attrition ball rate

The determination shall be conducted using the method specified in GB/T 12598.The specimen shall take the original sample.

6.3 Each batch of products must be inspected by the manufacturer's quality inspection

department. The manufacturer shall ensure that all products leaving the factory meet the technical requirements specified in this Standard. An inspection report shall be provided for each batch of products.

6.4 Appearance in 4.1 and water content, mass full exchange capacity, volume full exchange

capacity, wet apparent density, wet true density, particle size, and osmotic-attrition ball rate in

Table 4.3 of this Standard are exit-factory inspection items. The effective particle size and

uniformity coefficient in Table 4.3 are random inspection items and must be inspected at least once a month. Type inspection shall be conducted in accordance with the provisions of 6.6.1 in GB 1.3.

6.5 If the user requires inspection of the received products, it shall be conducted in accordance with the provisions of this Standard. Re-inspection shall be requested from the manufacturer within three months of receipt.

6.6 If the inspection results show that a technical requirement does not comply with the provisions of this Standard, re-inspection shall be conducted by sampling from twice the number of packages in the batch, and the grade shall be determined based on the re-inspection results.

6.7 If any dispute arises between the supplier and the purchaser regarding product quality, the dispute shall be resolved through mutual negotiation or arbitration by the authorized quality inspection department.

7.1 Marking

Each package must be clearly and securely marked with the product name, model, net weight, manufacturer's name, and this Standard number.

7.2 Packaging

The products must be packaged in a container lined with a transparent plastic bag or woven bag.

Each package must be accompanied by a certificate of conformity. The certificate must indicate the grade, batch number, and production date.

7.3 Transportation

During transportation, this product must be maintained at 5~40°C. Care must be taken to prevent the resin from losing water.

This product is not a hazardous material.

7.4 Storage

This product has a shelf life of two years under the temperature conditions specified in 7.3.

After the shelf life has expired, reinspection may be performed in accordance with the provisions of this Standard. If the reinspection results still meet the requirements of this Standard, it may continue to be used.