FIELD: measuring equipment.
SUBSTANCE: invention relates to measurement equipment for industry and can be used for testing of longitudinal and transverse specimens of parent metal pipes, samples with welded seams, including repair weld seam, for studying properties of sputtered materials, organic coatings for evaluation of steel to sulphide stress cracking. Apparatus comprises bearing frame and test specimen arranged symmetrically on 4-point bend between two inner supports and two external supports. Bearing frame is supplemented with fastener made up of permanent closed along outline of housing, inside of which, symmetrically in grooves of housing, there are external cylindrical support. Internal cylindrical supports are located in grooves at bottom of movable plate receiving load. Top plate edges is provided with symmetric chamfers for displacement between chamfers and housing wedges connected detachable with adjusting screws.
EFFECT: higher accuracy of determining (trap) of origination and development of corrosion cracks in samples of metal seamless and electric welded pipes, including thicker wall.
5 cl, 2 dwg
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