ASME B18.18.2:2009 pdf free download

ASME B18.18.2:2009 pdf free download.lnspection 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 relies 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 subjecting 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 Bask Plan Outline
The basic plan outline as shown in Fig. 1 is included to enhance understanding and use.
(b) They may be 100% sorted and all nonconforming parts removed.
(C) They may be reworked or reprocessed to correct the nonconforming characteristic(s).
(d) The customer may be informed of the rejectable items and his advice requested on their disposition.
If the customer considers that the degree to which the characteristic(s) deviates from specified requirements will have no significant effect on the performance of the parts in their service application, the customer may authorize release of the parts or materials for completion of production or for shipment as applicable.
2.9.2 Customer’s Options. The customer shall establish agreement with the manufacturer on one of the following options for the disposition of those lots or parts that have been rejected after receipt from the manufacturer:
(a) They may be scrapped.
(b) They may be 100% sorted and all nonconforming parts removed.
(c) They may be reworked or reprocessed to correct the nonconforming characteristic(s).
(d) If the customer considers that the degree to which the characteristic(s) deviates from specified requirements will have no significant effect on the performance of the parts in their service application, the customer may authorize release of the parts or materials for use and advise the manufacturer.
(c) They all may be returned.
2.9.3 Reinspection. All pieces that have been sorted and/or reworked in accordance with para. 2.9.1 or para. 2.9.2 shall be resubmitted for lot sampling and inspection in accordance with para. 2.7 or the characteristic(s) found nonconforming and all other characteristics that would be affected by the repair or reprocessing operation(s). If no parts in the sample inspected are found nonconforming, the material may reenter the production flow or may be approved for delivery or use as applicable.