NEW PIPE TESTING PROCEDURE

A NEW TESTING PROCEDURE DESIGNED TO ELIMINATE VIRTUALLY ALL HARD-TO-DETECT DEFECTS IN THE BELLS OF VITRIFIED CLAY PIPE INTENDED FOR INSTALLATION IN SEWERAGE LINES, WATER TREATMENT FACILITIES AND OTHER SIMILAR PROJECTS, HAS BEEN ADDED TO THE PRODUCTION LINES OF THE W. S. DICKEY CLAY MANUFACTURING COMPANY. THE BELL TEST IS THE NEWEST IN THE FIRM'S MANUFACTURING PROCESS. IT IS APPLIED WHEN THE PIPE, STANDING ON SPIGOT END, EMERGES FROM THE TUNNEL KILN. PREVIOUSLY, PIPE WAS LIFTED TO THE CONVEYOR BY PNEUMATICALLY OPERATED STEEL FORK HOOKED UNDER THE BELL. NOW, AN INFLATABLE RUBBER BLADDER IS INSERTED IN THE BELL SOCKET OF EACH PIPE AND A HYDRAULIC VALVE ON THE LIFTING UNIT CAUSES THE BLADDER TO EXPAND AT PRESSURES RANGING FROM 105 TO 150 PSI ON THE INSIDE SURFACE OF THE PIPE BEING TESTED. DEFECTIVE PIPE IS BROKEN BY THE BLADDER EXPANSION AND SCRAPPED. DICKEY MANUFACTURES THE PATENTED TESTING EQUIPMENT AT ITS GENERAL RESEARCH LABORATORY IN PITTSBURG, KANSAS. A URETHANE COLLAR IS USED IN CONJUNCTION WITH THE RUBBER BLADDER, MADE FROM THE SAME TYPE OF MATERIAL USED TO FORM THE FIRM'S URETHANE PIPE COUPLINGS. /ARTICLE/

• Supplemental Notes:
  • Vol 49, No 8, P 725
• Publication Date: 1970-8

Media Info

• Serial:
  • American Ceramic Society Bulletin
  • Publisher: American Ceramic Society

Subject/Index Terms

• TRT Terms: Defects; Expansion; Pipe; Pressure; Test procedures; Testing equipment; Urethane; Vitrified clay
• Uncontrolled Terms: Vitrified clay pipe
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217029
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 28 1970 12:00AM