UNE 66-020 Pt.2-1988 Sampling criteria for attribute inspection. Part 2: Sampling plan for inspection of individual pipeline segments according to quality limits
This standard establishes the sampling plans and rules for inspection by attributes, compatible with the UNE 66-020/1 standard, which can be used when the rules for modifying the inspection are not applicable, for example when dealing with lots. independent. The plans included in this standard are tabulated according to a normal series of limit quality (CL) values corresponding to a client risk generally less than 10% and always less than 13%. This reference method allows considering as a standardized procedure the