GB/T 9983-2026Industrial sodium tripolyphosphate (English PDF)

4.3 Tag Example Industrial sodium tripolyphosphate with an apparent density of

0.35 g/cm^3 to

0.50 g/cm^3 and a type I content of 5% to 20% is labeled as. Industrial sodium tripolyphosphate (LA)

7.1 Inspection Classification

7.1.1 Factory Inspection The factory inspection items include all the items specified in Chapter 5 except for iron content, water-insoluble matter, and total nitrogen (calculated as nitrogen).

7.1.2 Type Testing Type testing includes apparent density, Type I content, and all items specified in Chapter

5.Type testing shall be performed in the following circumstances.

a) During normal production, type testing should be conducted periodically, generally once a month;

b) Changes or abnormalities in production processes, equipment, raw materials, and procedures, as well as changes in production management elements (including personnel qualifications, equipment modifications, etc.). When changes in manufacturing processes may affect product quality and performance;

c) When production resumes after a long period of shutdown;

d) When the factory inspection results differ significantly from the previous type inspection results;

e) When market supervision and management agencies and users request type testing.

7.2 Batching and Sampling Rules

7.2.1 Batching Products are grouped into a single delivery batch consisting of products of the same type, specification, and batch number. Products must be inspected and approved by the manufacturer's quality control department according to... Only products that pass the testing methods specified in this document and are issued a quality certificate may leave the factory. The product quality inspection certificate should include the production details. Manufacturer name, product name, trademark, document number, batch number, batch size, quality indicators, production date, etc. The receiving party shall inspect the goods upon presentation of the product quality inspection certificate. If necessary, sampling and inspection may be conducted within one month in accordance with the following provisions as specified in 7.2.2.

7.2.2 Sampling The number of samples required for acceptance and inspection by the receiving party should be determined based on the batch size. Both parties should meet at the delivery location to collect samples from the delivered batch. Randomly select bags for sampling. According to GB/T 6678, when the total number of bags in each batch does not exceed 512, determine the number of sampling bags according to Table 3; for each batch... When the total number of product bags is greater than 512, the minimum number of sampling bags shall be determined according to the calculation result of formula (1). If the result is a decimal, it shall be rounded up to the nearest integer.

7.3 Judgment Rules The test results shall be determined according to the rounding value comparison method of GB/T 8170 to determine whether the product is qualified or unqualified. If one or more indicators do not meet the requirements of this document, the product shall be deemed qualified. According to the regulations, double the sampling should be taken from the delivered batch, and the non-conforming items should be retested. If the retest results meet the requirements of this document, the batch shall be deemed to be defective. If the product is qualified, then the batch of products is deemed unqualified.

8.1 Marking

8.1.1 The packaging shall bear the following markings.

a) Product name, trademark, and applicable standard number;

b) Production batch number or production date;

d) It has markings or labels indicating that it is waterproof or moisture-proof;

e) Producer's name, address, etc.

8.1.2 The printed marks (patterns and text) on the packaging should be clear, aesthetically pleasing, and free from fading.

8.2 Packaging Packaging should be done in woven plastic bags lined with polyethylene film, and the net content of the package should conform to the nominal weight.

8.3 Transportation During transportation, it should be protected from sunlight, rain, and moisture. Handle with care to avoid damage to the packaging bags.

8.4 Storage Products should be stored in a dry, clean warehouse. If outdoor storage is necessary, appropriate moisture-proof measures should be taken, and the stack height should not exceed the support height. The maximum load on the object shall be limited, and it shall be covered to protect it from sun, rain, moisture and damage.

8.5 Shelf life Under the specified storage conditions, the shelf life is more than one year from the date of manufacture, as indicated on the sales packaging.