Edison Welding Institute, Inc.

Alexander Savitski

Robert A Grimm

A non-destructive plastic butt weld inspection method in which the weld beadis removed from an exterior surface of a weld zone regionof a butt weld and the weld zone regionis heated to a temperature sufficient to visualize the weld zone. After heating, defective joints are readily identified by the appearance of a bond linein the weld zonewhile satisfactory joints merely show the weld zonewith no evidence of a bond line. Surface irregularities such as ridgesand indentationsmay also form in the weld zone during the heating step.

Non-destructive butt weld inspection method

A method for production of simultaneous lap and butt joints directs electromagnetic radiation ( ) through a radiation transmitting material ( ) to an absorbing material ( , and ) that absorbs radiation ( ) with the generation of heat. The heat provides sufficient molten material in interfaces ( , and ) to fuse and bond: 1) pipe ends ( ) to each other in a butt joint ( ), 2) pipe end portion ( ) to sleeve ( ) in a lap joint ( ), and 3) pipe end portion ( ) to sleeve ( ) in a lap joint ( ). Use of a sufficiently clear material for sleeve ( ) allows visual inspection of joints ( , and ). Butt joint ( ) can be formed by conductive heating without absorbing material ( ) to provide a smooth interior bore useful for transporting high purity fluids without risk of absorbent contamination or debris and organism collection in gaps found in previous joining techniques.

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Powell, OH, United States of America

Alexander Savitski