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ASME B18.18.2-2009 pdf free

ASME B18.18.2-2009 pdf free.Inspection and Quality Assurance for High-Volume Machine Assembly Fasteners.
ASME B18.18.2 outlines a Quality Assurance Plan for internally and externally threaded fasteners and accessories or associated parts. Provisions are included for sampling plans, inspection frequencies, control procedures, and record keeping.
Included in this plan are fasteners such as those where a more detailed inspection would enhance mass assembly operation. The quality assurance plan For these fasteners relics primarily on increased final inspection rather than on documented in-process control,
This Standard will be used in conjunction with other accepted standards for product, testing, gaging, and material and, therefore, those provisions as well as packaging are not included herein.
1.2 Inspection Levels
The substantial difference in importance to the user of various characteristics and the dissimilar degrees of control in manufacture make impractical the subecting of all characteristics to the same degree of inspection. Therefore, three inspection levels have been provided.
Any additional characteristics deemed applicable by the user that do not appear in the plan shall be explicitly designated by the user, preferably on engineering drawings and related specifications by the appropriate code letter at the time of ordering (see Nonmandatory Appendix B). To assist in arriving at the most appropriate inspection level, Fig. A-I included in Nonmandatory Appendix A is recommended for guidance.
1.3 Measuring and Testing Equipment
All measuring and testing equipment shall be systematically maintained and controlled as specified in
ISO 17025.
1.4 Basic Plan OutLine
The basic plan outline as shown in Fig. 1 is included to enhance understanding and use.
2.1 Scope
This Standard is an Acceptance Sampling Plan for high-volume machine assembly fasteners, accessories, and associated parts. It establishes specific inspection functions that must be performed on the finished product or at the appropriate stage of manufacturing with the objective of ensuring that the accepted product conforms to all the requirements of engineering drawings, related standards, and/or specifications.
This plan does not necessitate in-process control; however, the producer, at his discretion, may apply in-process control. Adherence to the requirements of this plan does not release the contractor from the responsibility of exercising due care in the production of all parts to the requirements established for all characteristics shown on engineering drawings and related specifications.
2.2 Applicable Characteristics
Unless designated characteristics are specifically specified in the product standard, the applicable characteristics include all characteristics of a part that are described by engineering drawings and related specifications. Three levels of inspection — A, B, and C — are provided in the plan. Alternate levels may be designated by the user ii required. Refer to Fig. A-i in Nonmandatory Appendix A to establish alternate levels as required. Any additional characteristic(s) deemed applicable by the user and not appearing in the general plan, or characteristics for which the user requires an inspection level other than that designated in the plan, must be explicitly requested by the user and shown on drawings or specifications by the appropriate code letter at the time of ordering (see Nonmandatory Appendix B).ASME B18.18.2 pdf free download.

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