Steel pipes' fabrication and testing before their installation during the construction of Boulder Dam in the United States.
United States USA Date:1933 Duration:4 min 2 sec Sound:NO SOUND
The fabrication of steel pipes during the construction of the Boulder Dam on the Colorado River in the United States. A man stands near a complete shop unit. Three curved plates are joined to form a ring. Two men in the plant. The ring sections arranged on either side. A man operates an X-ray machine used to examine welded joints. A man at a table. A man in a laboratory tests samples of welded joints. A man takes reading after testing. Men near the ring section. Another man brings a ladder. A man steps on the ladder near the section. Men at work on the welded joints. The rings being carried by hooks The ring section taken into annealing furnace for heating to equalize bending and welding strains. A man tightens the joints in the ring section with equipment. A man near a shop unit. A hook hangs beside the unit. A rail car arrives. Men on either side of a track.
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