GB/T 7323-2019Extreme pressure lithium lubricating grease (English PDF)

5.1.1 Factory-exit inspection

Factory-exit batch inspection items include: work cone penetration, dropping point, corrosion, oil separation and extreme pressure performance (four-ball machine method) PB.

Factory-exit cycle inspection items include: evaporation loss, impurity, similar viscosity, extended work cone penetration, water washout loss and oxidation stability, which are inspected every six months; corrosion resistance, extreme pressure performance (Timken method) OK value and low temperature torque, which are inspected once a year.

5.1.2 Type inspection

Type inspection items include all the items in Table 1. Type inspection shall be carried out in one of the following cases:

a) When a new product is put into production or when product type identification;

b) When major changes in raw materials, processes, etc., may affect product quality;

c) When there is a big difference between the factory-exit inspection result and the last type inspection result.

5.2 Batching

Under the condition of the same raw materials and technology, each can or kettle is a group (batch).

5.3 Sampling

Sampling is carried out according to SH/T 0229. 4 kg is taken for inspection and as retention samples.

5.4 Determination rules

If the factory-exit inspection and type inspection results meet the requirements of Table 1, the batch of products is determined to be qualified.

5.5 Re-inspection rules

If the factory-exit inspection results do not meet the requirements of Table 1, it shall take double quantity of samples for re-inspection according to the provisions of SH/T 0229. If there are still non-conforming items in the re-inspection results, the batch of products shall be determined unqualified. […]