How to accept the batch arrival of ULPA? Appearance, size and sampling plan

batchThe arrival acceptance of ULPA filters should check the quantity, packaging, labeling, appearance, size and testing data according to the agreed plan, and distinguish between all items and sampling items. Arrival sampling inspection cannot replace the agreed factory inspection one by one. The difficulty of batch acceptance lies in the large number of items and the large quantity. It is unrealistic to inspect all units one by one. Sampling also has the risk of representativeness. The plan is unreasonable, and inspections are either missed or done in vain. Aili Industry provides factory inspection data on a batch-by-batch basis during batch delivery. The appearance and key dimensions of each filter element have been inspected and recorded before leaving the factory. The arrival acceptance can be subject to sampling review based on the factory data, and on-site inspection resources can be focused on problems that may be introduced during transportation.

1. Confirm the acceptance plan before purchasing: distinguish the full inspection items and random inspection items first

Clarify sample selection, critical dimensions, testing methods, unqualified handling and expanded inspection conditions to avoid temporary decisions after arrival.

Which items must be fully inspected, which ones can be sampled, what the sampling ratio is, and how to expand the scope of inspection when it is unqualified should be stipulated in the purchase agreement. Aili Industry isBefore batch delivery of HEPA/ULPA filters, the acceptance plan can be confirmed with the project party: the quantity, packaging and labeling are usually fully checked, the appearance and key dimensions can be sampled according to the agreed proportion, and the test data corresponds to a single unit or batch. The relationship between levels and filtering requirements can be found inISO cleanliness level comparison。

2. Pay attention to batch differences and transportation events: samples should cover different batches and pallet locations

Different production batches, packaging locations or damaged pallets should be identifiable, and samples should not be limited to the most easily accessible boxes.

Batch arrivals may include multiple production batches, and different batches may have slight differences in materials and processes; packaging at different locations on the same pallet will also suffer from different transportation forces. If the sample is only taken from the uppermost layer or the outermost layer, it may happen to avoid the location with greater stress. Aili Industry isWhen ULPA ultra-high-efficiency filters are delivered in batches, they are labeled by batch and pallet. Acceptance sampling can be selected by batch and pallet location, covering different sources and stress locations. For packaging and transportation protection requirements, please refer toHEPA FAQs and Selection Guide。

3. Appearance inspection should cover three levels: packaging, frame and media.

Visual inspection is not just about looking at the surface of the filter element. Check whether the outer packaging is damaged, whether the inner packaging is damp, whether the outer frame is bumped or deformed, whether there are any abnormalities in the glue seams, and whether there are any indentations on the filter surface. These should be checked in layers.

Transportation damage often starts from the outer packaging and passes inward layer by layer. Aili Industry isThe packaging of non-standard ULPA filter large-size models is equipped with protection at different levels. When the outer packaging is damaged, the inner packaging status can be used to determine whether the filter element is affected. The appearance status of each filter element in the factory inspection record has been archived. During the arrival inspection, it can be compared with the factory record to distinguish whether it is the factory status or the changes introduced during transportation. To determine appearance and structural damage, please refer toULPA ultra-high efficiency filter FAQ and selection guide。

4. Dimensions are randomly inspected to select key matching dimensions, without measuring the entire appearance.

When inspecting dimensions in batches, key dimensions that affect installation and sealing should be selected: frame width and height, thickness, diagonal or squareness, and sealing surface position. Full-scale measurement is a heavy workload and has limited significance, and only critical dimensions can reflect assembly risks.

Aili Industry isHEPA/ULPA filters .The key dimensions and squareness are recorded during the factory inspection of The size of the filter element interface of the FFU fan filter unit corresponds to the size of the box; during random inspection upon arrival, the key dimensions can be checked against the factory data and drawing version. If a deviation is found, check whether it is a processing deviation or transportation deformation from the factory record. Please refer to the key points of size measurement caliber.HEPA FAQs and Selection Guide。

5. Establish release and isolation records: abnormal parts cannot be mixed into the accepted inventory

Correspond the inspection results of each batch with the actual objects, and identify abnormal parts separately. After the disposal is completed, the ledger will be updated to prevent unconfirmed parts from being mixed into the accepted inventory.

Abnormal parts discovered during batch acceptance should be isolated and identified separately, and physically separated from released products. Aili Industry isWhen ULPA ultra-high-efficiency filters are delivered, inspection records and packaging lists are provided by batch. The acceptance ledger can record the inspection results, abnormal part numbers and processing status of each batch.The FFU computer group control system can continue to record the correspondence between the filter element serial number and the point after installation. For traceability methods of batches and single units, please refer toULPA ultra-high efficiency filter FAQ and selection guide。

6. Related questions and answers

Can I receive the goods if the quantity matches?
Quantity is only one of them, and the identity, status and testing data need to be checked according to the agreement.

When multiple boxes are hit at the edge of the pallet, is it okay to only check that the center package is intact?
Can't. Additional assessments should be conducted on relevant areas, and samples should cover locations with greater stress.

Can the spot inspection upon arrival replace factory-by-unit inspection?
cannot. Sampling inspection is a review of the transportation process, while factory-by-unit inspection is the basis for verification of product performance. The two have different functions.

7. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

ULPA ultra high efficiency air filter

Non-standard customized ULPA ultra-high efficiency filter

HEPA FAQs and Selection Guide

8. Key points for selection and acceptance inspection

9. Product matching and technical support from Aili Industrial

Aili Industry isWhen HEPA/ULPA filters are delivered in batches, factory inspection data is provided by batch. The appearance and key dimensions of each filter element are inspected and recorded before leaving the factory;ULPA ultra-high-efficiency filters are marked in layers according to batches and trays, and acceptance sampling can be selected in layers;The packaging of non-standard ULPA filter large-size models is protected by layers, and the factory inspection records can be compared with the arrival status. Inspection records and packaging lists are provided upon delivery, and the acceptance ledger can match the inspection results with the abnormal part numbers.The size of the filter element interface of the FFU fan filter unit corresponds to that of the box.The FFU computer group control system can continuously record the serial number and point relationship. Provide process objectives, installation drawings, operating conditions and acceptance requirements, and can further communicate ULPA standard specifications, non-standard interfaces, samples and batch matching. The specific parameters and test range are based on the confirmed model and technical documents.