Repair of castings

When repairs are undertaken, usually by welding, the repair must be inspected. Initially the faulty material must be removed by any suitable means and then checked to ensure that all faulty material has been removed; this is normally by dye penetrant or magnetic particle. The repair is then carried out. The component must then be inspected by the same method which found the original flaw. Fans built specifically for a pur­chaser may have repairs categorised into “major” and “minor”.

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