Method for producing an aggregatelined corrosion-resistant hot water tank

Claim 1

THE METHOD OF LINING CYLINDRICAL METALLIC BODIES WHICH COMPRISES FIRST COATING INNER WALL SURFACE OF A CYLINDRICAL METALLIC BODY WITH A FILM OF LIQUID PHENOL FORMALDEHYDE RESIN; CAUSING SAID RESIN TO HARDEN; INTRODUCING WITHIN SAID BODY THE COMPONENTS OF A FLUID CEMENTITIOUS MIX COMPRISING PORTLAND CEMENT, SAND, WATER, AND A CURING ACCELERATOR FOR SAID MIX; AGITATING SAID BODY IN A MANNER TO THOROUGHLY ADMIX SAID COMPONENTS AND ACCELERATOR WITHIN SAID BODY; AXIALLY ROTATING SAID BODY ABOUT A SUBSTANTIALLY HORIZONTAL AXIS TO CENTRIFUGALLY DEPOSIT AND COMPACT THE MIX IN A CON TINUOUS LAYER UPON THE INNER WALL SURFACE OF SAID BODY; VIBRATING SAID BODY BY FORCES APPLIED EXTERNALLY THERETO ALONG A LINE EXTENDING SUBSTANTIALLY THROUGHOUT ITS FULL LENGTH AND DURING ROTATION THEREOF; AND CONTINUING ROTATION OF SAID BODY UNTIL SAID MIX CURES TO A HARDENED STATE.