BS EN 3818:2019 pdf free.Aerospace series – Bolts, MJ threads, in titanium alloy TI- P64001 – Strength class: 1 100 MPa (at ambient temperature) – Technical specification.
3.3.4 inclusions non-metallic particles originating from the material manufacturing process. These particles may be isolated or arranged in strings 3.4 simple random sampling taking of n items from a population of N items in such a way that all possible combinations of n items have the same probability of being chosen 3.5 major defect defect, other than critical, that is likely to result in a failure or to reduce materially the usability of the considered product for its intended purpose 3.6 minor defect defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or that is a departure from established specification having little bearing on the effective use or operation of this product 3.7 sampling plan plan according to which one or more samples are taken in order to obtain information and possibly to reach a decision The qualification procedure for aerospace standard products [e. g. according to EN 9133 or an equivalent aerospace accepted and established qualification procedure) shall be used and documented according to the specified tests if not otherwise agreed between customer and supplier. Qualification inspections and tests (requirements, methods, numbers of bolts) are specified in Table 1. They shall be carried out on: – each type and diameter of bolt; 一20 bolts selected from a single batch by simple random sampling. The test programme may possibly be reduced, or the qualification be granted without inspection or testing. Any such decision shall be based on the results obtained on similar types and diameters of bolts provided that the design and manufacturing conditions are identical. Table 2 indicates the allocation of bolt samples for the inspections and tests.The purpose of acceptance inspections and tests is to check, as simply as possible, by a method representative of actual use conditions, with the uncertainty inherent to statistical sampling, that the bolts constituting the batch satisfy the requirements of this standard.BS EN 3818 pdf download.