| 摘要 |
PURPOSE: A PVC(polyvinyl chloride) pipe is provided to reduce leakage of chemical through enlarging combined area of the PVC pipe and various connect components. CONSTITUTION: While combining outer/inner surfaces of PVC pipes(100) to an elbow, the pipes are connected to each other. The elbow contains outer/inner areas(102,104) combined to outer/inner surfaces of the pipes. Herein, combined section is formed in U-shape. A combine unit of the pipes and the elbow is formed by outer surface of the elbow outer area, a combined area(106) of outer surfaces of outer area/pipe, a combined area(108) of outer/inner surfaces of elbow inner area/pipe, and inner surface of the elbow inner area. Herein, combined area of the pipe and the elbow is enlarged to improve lifetime of the PVC pipe while being infiltrated by chemical. Therefore, leakage is prevented.
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