Standard weld testing

Standard weld testing

Airline buys compact penetrant system Japan Airlines have recently installed a sin~e-booth fluorescent penetrant system which includes every facility ...

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Airline buys compact penetrant system Japan Airlines have recently installed a sin~e-booth fluorescent penetrant system which includes every facility for the penetrant inspection of large components in a 3.5 x 6 m space, 4.5 m high. The Airline bought the equipment from Toyushu Toryo to inspect engine components of the jumbo jets; the fan for the engine is 2.5 m in diameter. The equipment allows inspection of parts up to 3 m diameter. The booth is equipped with a positioner, a water jet, an electrostatic spraying unit, a hot-air blower and uv and white lights. Engine components are moved into the booth and placed on the positioner by a crane. The penetrant is sprayed on with an electrostatic spraying unit at a rate of 300 ml min "l from a supply of 50 I. The electrostatic generator has an output of 60 kV, 200/.tA. The part is then washed from a fixed rinsing unit and then dried• A developer is then electrostatically sprayed on and the part inspected by a trained inspector. The penetrant and developer are washed away into a drain tank, both can be recovered by the water-screen unit which is used to cool the booth. Toyushu Toryo Co Ltd, 1 7 - 3 5 Omori Nishi 4-Chome, Ota-ku Tokyo, 143, Japan


If the disc were still tile eye would see an image made up of many small dots which give a different view point. The spinning of the disc gives a combined image.


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Fig.4 Rack version of an ultrasonic flaw detector for the laboratory

The system needs less illumination than screen projection to give a satisfactory, bright image. It is difficult to calculate the optical performance for this kind of system but there must be some vibration of the spinning disc which could effect resolution.

Tester on the rack

Vision Engineering Ltd, Send Road, Send, Woking, Surrey, UK


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Terratest, a British company which makes and markets ultrasonic testing equipment, is to sell a rack version of the MPT l0 flaw detector (Fig.4). This equipment is made by KLN in Germany. The monitors are available in single or double channel version with output proportional to echo amplitude. Terratest (GB) Ltd, St Thomas Road, Wigston, Leicester LE82 TA, UK Easy on the eye A British company has introduced an optical presentation system for microscopes which avoids many of the disadvantages o f screen projection (Fig.5). The instrument, the Dynascope, uses a spinning mirror disc embossed with lenticular forms to give a large exit pupil diameter.

Fig.5 A research w o r k e r uses a spinning-disc optical presentation fitted to a biological microscope

LITERATURE A N D S E R V I C E S Testers" booklet Terratest has published a booklet that describes ultrasonic flaw detection. It gives information on various monitors for different testing problems and illustrates typical flaws and their chart response. Terratest (GB) Ltd, St Thomas Road, Wigston, Leicester LE8 2TA Standard weld testing The British Standards Institution has published a standard for ndt for fusion and resistance welds. The standard,

BS M42: 1972, is entitled 'Methods for non-destructive testing o f fusion and resistance welds in thin-gauge materials'. It is an addition to the series on ndt and inspection of aerospace materials, components and structures. It covers welds in materials of thickness 2.5 mm and less and includes references to other ndt standards in the series. The standard contains tables that give information on the application o f methods, other than visual, for the material and welding method used and for the type of defect sought. It covers penetrant, magnetic-particle,


radiographic and ultrasonic inspection. The BSI does not intend this standard to be used as a specification for acceptance or rejection. British Standards Institution, 2 Park Street, London WlA 2BS, UK Defensive radiography Metal and Pipeline Endurance (MAPEL) has opened a radiation-proof building for its radiographic services in London (Fig.I). The building, which the Company calls Fort Blockhouse, has concrete walls 5t5 mm thick and a system of warning lights and klaxons.