摘要:

This article describes the removal and replacement of old metallium joints at the Florence, Nebraska, filter plant. In April 1983, cracked joints in wash‐water piping began to appear at the plant. Joint cracking was attributed to two main factors: the affected joints had been painted with a vinyl‐type paint, which prevented moisture from escaping from the joints; and corrosion products from sulfur and iron had apparently created expansive forces, which cracked the hubs. After initial repairs, work was begun in 1984 to remove all cracked valves and other metallium joints and repour them with lead. Sandblasting was used to remove the metallium joint compound. The problems encountered in this process and the solutions that were devised are presented. In total, 23 tons of sand and 4600 pounds of lead were used, and eight cracked 20 inch valves were removed. One hundred and twenty metallium joints were cleaned; 22 of these were eliminated and 98 were repoured with lead. The costs of this project are listed.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1986.tb00193.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

This article describes the construction of a gate valve adaptor which can be used when installing a water main gate‐valve‐box setting to eliminate any settling or shifting of the valve box. The adaptor is cost effective since it eliminates future excavation and resetting of the box, and eliminates the possibility of an improper key set due to settling or shifting.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1986.tb00194.x

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

This article discusses the impact of the Fair Labor Standards Act on the Denver Water Department, where treatment plant operators have been working on a 12‐hour shift schedule since 1980. A recent ruling on the Act does not outlaw the use of extended shifts, but it requires that all hours worked over 40 in a work week must be paid at the time and one‐half overtime rate. The Denver Water Department found that it could minimize overtime by redefining the work week so that operators' work hours were more evenly distributed between weeks. The new schedule produces a maximum of eight hours of overtime pay per operator every four weeks. A table illustrating Denver's 12‐hour shift schedule is presented.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1986.tb00195.x

出版商:Wiley    

年代:1986

数据来源: WILEY