Steel castings. Liquid penetrant inspectionBS ISO 4987: 2010 Steel castings. Liquid penetrant inspection BS ISO 4987 is an International Standard which specifies a method for the liquid penetrant inspection of steel castings, whatever their grade and the casting procedure used to produce them. Contents of BS ISO 4987: Foreword Introduction 1 Scope 2 Normative references 3 Ordering information 4 Method of inspection 4. 1 Operating mode 4. 2 Qualification of the operators 4. 3 Surface

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