BS ISO 23572 pdf free download
BS ISO 23572-2020 pdf free download.Petroleum products — Lubricating greases — Sampling of greases.
5.7 Containers The containers intended to receive the samples shall be clean and dry and non-corrodible by the sampled products. When the samples are stored over prolonged periods, the containers shall be resistant to the ambient conditions and well-proof if the container has been obtained by crimping. The containers shall be able to be closed with a tight lid. 6 General measures 6.1 Sampling on the manufacturing site If the inspection is performed on the manufacturing site, the samples shall be withdrawn from the containers ready for shipping separately on each manufacturing lot. Grease samples shall not be taken directly from grease kettles, cooling pans or tanks of processing equipment. Do not sample the grease before it has stayed for at least 12 hours in the finished container and has cooled down to a temperature not more than 9 ° above that of the air surrounding the container.
If the same grease batch is packaged in containers of different sizes, treat the grease in each size of container as a separate lot. 6.2 Sampling on the delivery site When the inspection is made at the place of delivery, obtain a sample from each shipment. If the shipment consists of containers from more than one production batch (lot number), sample each batch separately. 6.3 Sample size Select containers at random on each lot or each shipment to give the required quantity as specified in Table 1.
7 Procedure 7.1 Inspection Examine the open containers to determine whether the grease is homogeneous. Compare the appearance, texture and consistency of the grease that stays in the vicinity of the surface with the grease located at least 15 cm below the surface. When more than one container of a lot or shipment is opened, proceed to the same examinations as before on all opened containers. 7.2 Sampling If, when inspecting, no marked difference is evident, withdraw one portion from the approximate centre and at least 6,5 cm below the surface of each opened container in sufficient quantity to provide a composite sample of the desired quantity (see Table 1). Withdraw portions with a clean spatula (5.2) and a ladle, big spoon or grain shovel (5.3) and place them in a clean container (5.7). For soft and very soft greases, it is preferable to use a ladle with a volume of approximately 0,5 l. If there is any marked difference in appearance or texture of the grease from the various locations of an open container, take two separate samples of approximately 0,5 kg each, one from the top of the surface near the walls and the other from the centre of the container, at least 15 cm below the surface. If any marked variations are noted between different containers of a lot or shipment, take separate samples of approximately 0,5 kg. If, because a lack of uniformity, more than one sample of a batch or shipment is taken, the samples shall be sent for laboratory inspection as separate samples.
7.3 Handling of grease samples If more than one portion is required to represent a lot or shipment of grease with a penetration larger than 175 units of 0,1 mm tested in accordance with ISO 2137, a composite sample shall be prepared by blending aliquot portions thoroughly. This composite sample shall be prepared in a clean container, using a spatula, avoiding a too intense mixing and the inclusion of air bubbles. As the grease samples become partially worked in being removed from containers, the procedure is not valid when “unworked” penetration is determined.BS ISO 23572 pdf download.
