| 摘要 |
<P>PROBLEM TO BE SOLVED: To keep risk to a minimum by immediately specifying a shipping destination of a cast iron pipe upon occurrence of a trouble by reliably grasping the manufacturing history and management of the shipping destination for each cast iron pipe, and to assure further reliability and safety of the cast iron pipe by unifying the management for each cast iron pipe. <P>SOLUTION: On a surface of a core for casting a socket corresponding to an end surface on the outside of a flange formed in a socket of the cast iron pipe to be casted, a recess for forming a management number formed by rugged characters is previously inscribed for each core. By using the core with the inscribed recess, the cast iron pipe with the management number formed for each pipe is manufactured, and the manufacturing history data and the shipping destination data of the cast iron pipe are stored for each management number, thereby managing the manufacturing history and the shipping destination for each cast iron pipe by the management number. <P>COPYRIGHT: (C)2012,JPO&INPIT |
