AS 1085.4:2002 pdf – Railway Track Material Part 4: Fishbolts and Nuts

AS 1085.4:2002 pdf – Railway Track Material Part 4: Fishbolts and Nuts.
This Appendix sets out the following different means by which compliance with this
Standard can be demonstrated by the manufacturer or supplier:
(a) Evaluation by means of statistical sampling.
(b) The use of a product certification scheme.
(C) Assurance using the acceptability of the supplier’s quality system.
(d) Other such means proposed by the manufacturer or supplier and acceptable to the customer.
A2 STATISTICAL SA1PLING
Statistical sampling is a procedure which enables decisions to be made about the quality of hatches of items after inspecting or testing only a portion of those items. This procedure will only be valid if the sampling plan has been determined on a statistical basis and the following requirements are met:
(a) The sample needs to be drawn randomly from a population of product of known history. The history needs to enable verification that the product was made from known materials at essentially the same lime, by essentially the same processes and under essentially the same system of control.
(b) For each different situation, a suitable sampling plan needs to he defined. A sampling plan for one manufacturer of given capability and product throughput may not he relevant to another manufacturer producing the same items.
In order for statistical sampling to be meaningful to the customer, the manufacturer or supplier needs to demonstrate how the above conditions have been satisfied. Sampling and the establishment of a sampling plan should be carried out in accordance with AS 1199, guidance to which is given in AS 1399.
A3 PRODUCT CERTIFICATION
The purpose of product certification is to provide independent assurance of the claim by the manufacturer that products comply with the stated Standard.
The certification scheme should meet the criteria described in HIl 18.28 in that. as well as full type testing from independently sampled production and subsequent verification of conformance, it requires the manufacturer to maintain effective quality planning to control production.
The certification scheme serves to indicate that the products consistently conform to the requirements of the Standard.