This standard is issued under the fixed designation B; the number 1 This test method is under the jurisdiction of ASTM Committee B08 on Metallic. ASTM B_机械/仪表_工程科技_专业资料。 Designation: B – 88 ( Reapproved ) Standard Test Method for Attribute Sampling. Purchase your copy of ASTM B – 88() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards.
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Click to learn more. Please download Chrome or Firefox or view our browser tips. An alternative is rectifying inspection in which rejected lots are screened and used.
ASTM B – 88() Standard Test Method for Attribute Sampling of Metallic and Inorganic Coatings
Variables plans are applicable when a test yields a numerical value for a characteristic, when the specication imposes a numerical limit on the characteristic, and when certain statistical criteria are met. If this is not the case, the correct AOQL will be smaller than the tabulated value.
A number in parentheses indicates the year of last reapproval. The larger the proportion of nonconforming articles in an inspection lot, the more likely it will be that the sample will indicate that the lot is unacceptable.
Formation of Inspection Lot 7. Take the rst two digits in each aatm of ve digits. These are explained in Test Method B The tables give the AOQL for each plan.
ASTM B602 – 88(2016)
One of these Table 2 is considered to be standard and is the one that is followed unless the user of this method species either a higher quality level Table 1 or a lower one Table 3. NOTE 3—The plan given for destructive tests uses smaller samples than the plans given for nondestructive tests. The fourth plan is intended to be used when the inspection methods are destructive.
Also, some test methods are destructive, in which cases sampling inspection must be used to avoid destroying the lot. Also, Guide B describes the nature of attribute sampling plans and the several factors that must be considered in the selection of a sampling plan.
Therefore, basic to any sampling inspection plan is the willingness of the buyer to accept lots that contain some nonconforming articles. It is the worst condition that can occur under rectifying inspection.
ASTM B – 90() Standard Test Method of Variables Sampling of Metallic and Inorganic Coatings
If it is less, the lot does not conform. Link to Active Asgm link will always route to the current Active version of the standard.
If only a few articles in an inspection lot are nonconforming, the sample probably will indicate that the lot is acceptable; but there is a small probability that b62 sample will indicate that the lot is unacceptable. Inspection lots that are unacceptable with respect to one or more requirements shall be rejected.
The number is compared to a maximum allowable. Through the use of sampling plans, the risk of error is known and controlled. Electrodeposited coatings, Inorganic coatings, Inspection, Inspection and verification, Metallic coating, Paint related coatings, Protective coatings, Sampling. There may be cases in which destruction of even these smaller quantities is undesirable.
Through the selection of a sampling plan, the potential error is known and controlled. Screening is to be used only when required by the purchaser.
Accept and continue Learn more about the zstm we use and how to change your settings. B — 88 5. Through the use of sampling plans, the risk of error is known and controlled. If this number equals or exceeds the specified minimum, the inspection lot conforms to the requirements.
A random number from 1 to 24 is selected either from a table see A1. Aetm comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Zstm larger the sample, the smaller this risk, but, the larger the cost of inspection.
The AQL is the quality level that is considered to be acceptable. The plan of Table 4which is used for destructive testing, is not from the Military Standard. The AQL is the quality level that is considered to be acceptable.