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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You may experience issues viewing this site in Internet Explorer 9, 10 or At intermediate quality levels of incoming lots, the average quality level of a series of lots will not be as asym as in either of the above cases. There may be instances in which tighter or looser plans or ones that are more discriminating are desired.
The specific plans selected are identified in Tables of this test method. If the pencil falls on column 10, line 11, and the coin is tails, the decision is to read down the column until 13 numbers are chosen. Accept and continue Learn more about the cookies we use and how to change your settings.
The fourth plan is intended to be used when the inspection methods are destructive. Find Similar Items This product falls into the following categories. The permission to use test specimens and the requirements covering them and their use should be set forth in the applicable coating specication, purchase order, or other governing document.
The correct values are obtained by multiplying the tabulated values by: In these instances the purchaser needs to decide and state whether the tests are to be considered destructive or nondestructive. Here, a constant interval is maintained between the items drawn for the sample.
Formation of Inspection Lot 7.
When a test is neither clearly nondestructive nor destructive see Note 2, 8. The selection of random numbers is made as follows: Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Worldwide Standards We can source any standard from anywhere in the world. The plan of Table 4, which is used for destructive testing, is not from the Military Standard. There may be cases in which destruction of even these smaller quantities is undesirable.
If it is less, the lot does not conform. The tables give the AOQL for each plan. This may be done by placing the units in racks or trays where the positions in the racks are numbered.
ASTM B – 88() Standard Test Method for Attribute Sampling of Metallic and Inorganic Coatings
Link to Active This link will always route to the current Active version of the standard. For example, if a sample of 50 articles drawn in accordance with Table 2 is found to contain two defectives with respect to thickness and a third one with respect to appearance, the inspection lot is acceptable because although three articles were defective no more than two, the acceptance number, were defective with respect to a single requirement. When incoming lots are of a poor quality level, the average quality of a series of lots will again be good because many of the incoming lots will be rejected and upgraded.
NOTE 4—The acceptability of an inspection lot is determined with respect to each requirement independently from all other requirements. The AQL is the quality level that is considered to be acceptable.
The AQL is the quality level that is considered to be acceptable. Sampling plans based on inspection by variables are given in Test Method B These are explained in Test Method B There may be instances in which tighter or b620 plans or ones that are more discriminating are desired. B — 88 Reapproved Standard Test Method for Attribute Sampling of Metallic and Inorganic Coatings1 This standard is issued under the xed designation B ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
If the units have serial numbers, the serial numbers can be used. Such lots will always be accepted. Screening of rejected lots will asgm increase the cost of inspection if the incoming lots are much worse than AQL quality. After the rst item is taken, the remaining items in the required sample are drawn by selecting 6b02 24th item from the lot until are selected. The constant interval is 24 divided by Last previous asrm approved in as B — 88 Variables plans are applicable when a test yields a numerical value for a characteristic, when the specification imposes a numerical limit on the characteristic, and when certain statistical criteria are met.
ASTM B – 90() Standard Test Method of Variables Sampling of Metallic and Inorganic Coatings
Please download Chrome or Firefox or view our browser tips. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Your basket is empty. Link to Active This link will always route to the current Active version of asym standard. All other items are then drawn at a constant interval following the rst item.
ASTM B602 – 88(2016)
If every article in an inspection lot is nonconforming, a sample will always indicate that the lot is unacceptable. Variables plans are applicable when a test yields a numerical value for a characteristic, when the specification imposes bb602 numerical limit on the characteristic, and when certain statistical criteria are met.
It is the responsibility of the user of bb602 standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Additional plans that may serve these needs are given in Guide B