AS ISO 9934.3:2020 pdf free download – Non-destructive testing —Magnetic particle testing Part 3: Equipment

AS ISO 9934.3:2020 pdf free download – Non-destructive testing —Magnetic particle testing Part 3: Equipment.
This part of ISO 9934 describes three types of equipment for magnetic particle testing:
— portable or transportable equipment;
— fixed Installations;
— specialized testing systems for testing components on a continuous basis, comprising a series of processing stations placed in sequence to form a process line.
Equipment for magnetizing, demagnetizing, Illumination, measurement, and monitoring are also described.
This part of ISO 9934 specifIes the properties to be provided by the equipment supplier, minimum requirements for application and the method of measuring certain parameters. Where appropriate, measuring and calibration requirements and in-service checks are also specified.
2 Normative references
The Following documents, in whole or In part, are normatively referenced In this document and are indispensable for its application. l:or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3059, Non-destructive testing — Penet rant testing and magnetic particle testing — Viewing conditions
ISO 9934-1, Non-destructive testing Muqnetic particle testing — Part 1: General rules
EN 10250-2, Open steel die forgingsforgenerai engineering purposes — Non-alloy quality and special steels
IEC 60529, Degrees of protection provided by enclosures (IP Code)
3 Safety requirements
The equipment design shall take into account all international, European. national and local regulations which include health, safety, electrical and environmental requirements.
4 Types of devices
4.1 Portable electromagnets (AC’))
4.1.1 General
Hand•lwld portable electromagnets (yokes) produce a magnetic held between the two poles. When testing according to ISO 9934-1, DC1) electromagnets should only be used if agreed at enquiry and order stages.
Magnetization shall be determined by measuring the tangential field strength, ll, at the centre of a line Joining the centres of the pole faces of the electromagnet with pole extenders where used. The electromagnet with a pole spacing, s, Is placed on a steel plate as shown In Figure 1.
If viewing for indications is carried out after demagnetization, indications shall be preserved by a suitable method.
8.2 Technical data
The following data shall be provided:
— method(s) of demagnetization;
— type of current regulation;
— field strength (at the centre of the empty demagnetizing coil if applicable);
— residual field for a specified component;
— electrical supply requirements at maximum current output (voltage, phases, frequency, and current) if separate from the general equipment;
— overall dimensions of equipment if separate from the general equipment:
— equipment mass, in kilograms. Ilseparate from the general equipment
8.3 Technical requirements
The equipment shall be capable of demagnetizing to a specified level (typically 0,4 kA/m to 1.0 kA/m) unless otherwise agreed.
9 Measurements
9.1 General
In connection with this part of Iso 9934. measurements are required for the following:
— determination of the equipment characteristics;
— checking inspection parameters.
For all current and magnetic field measurements, only instruments that respond directly to the waveform shall be used. Instruments that calculate peak or RMS values based on calculation derived from other values shall not be used, Where True RMS meters are used to measure RMS values the specified crest factor of the instrument shall be greater than the crest factor of the waveform being measured and generally not less than 5.
9.2 Current measurement
Pure AC sinusoidal waveforms can be accurately measured using clamp meters or other conventional instruments. Measurements of phase controlled currents can be more complex and It shall be verified that the instrument used has the correct response before use on these waveforms. Measurement systems using shunts with suitable voltage measurement instruments shall he regarded as current meters and conform with the requirements for such instruments.