abstrakcja

This guide covers a standard method for selecting a sampling plan for checking the electrodeposition of metallic and inorganic coatings on products, with the aim of determining whether the submitted lot complies with the specifications applicable to coatings. The characteristics of the sampling plan are expressed in terms of acceptable quality level (AQL), restricted quality level (LQL), average efferent quality (AOQ), and average efferent quality limit (AOQL). General procedures and criteria for constructing and selecting sampling plan types, selecting specific plans, selecting inspection lots, sample sampling and inspection, and lot disposal are discussed in full.

To podsumowanie stanowi krótki przegląd standardów referencyjnych. Służy wyłącznie celom informacyjnym i nie stanowi oficjalnej części normy; Aby zapoznać się z jej wykorzystaniem i zastosowaniem, wymagane jest odniesienie do pełnego tekstu samej normy. ASTM nie udziela żadnych gwarancji, wyraźne lub dorozumiane, i nie oznacza, że ​​treść tego streszczenia jest dokładna, kompletne lub nowe.

ASTM B697-88-2016 Standardowy przewodnik dotyczący wyboru schematów pobierania próbek do kontroli galwanizowanych powłok metalicznych i nieorganicznych

Krok 1: Zakres

1.1 This guide provides guidance on the selection of a sampling plan for examining electrodeposition of products and associated coatings to determine whether submitted batches of coated products comply with applicable specifications for coatings. This complements test method B602, provides more information about sampling inspections, and provides additional sampling plans for users who find limited plan options in test method B602.

1.2 When using a sampling plan, select and inspect items from a relatively small portion of the inspection lot. Based on the results, it is decided whether the inspection lot is satisfactory to the specification.

1.3 The Guide also contains several sampling plans. A plan is an attribute plan, to jest, in the application of the plan, each inspected item is classified as meeting or not meeting each coating requirement. Compare the number of nonconforming items to the maximum allowable quantity. The plan is simple and relatively few. Additional plans covering more cases and more complex plans are provided in references (1-7) at the end of this guide and MIL-STD-105.

1.4 Use acceptance sampling plan:

1.4.1 The inspection cost is high and the consequences of accepting nonconforming products are not serious.

1.4.2 When 100% check fatigue and boredom, errors may result. In these cases, a sampling plan can provide greater protection than a 100% kontrola.

1.4.3 Destructive tests are required during inspection. Here, sampling inspection is used.

1.5 Another general type of acceptance sampling plan not covered by this guide is a variable plan, in which measurements of characteristics are analyzed by a statistical procedure. These plans, where applicable, can reduce inspection costs and improve quality protection. For planned information on variables, the test method is given to B762, MIL-STD-414, ANSI/ASQC Z1.9-1979 and references (1-2).