The copper alloy make pipe arrangement equipment which contains the lead elution decrease treatment mannered null lead of copper

摘要

PROBLEM TO BE SOLVED: To provide a treatment method for reducing the elution of lead from copper alloy piping equipment such as a valve/pipe fitting by which , in the use of lead-containing copper alloy piping equipment, the remarkable reduction of the amount of lead to be eluted is made possible compared with the conventional standard at a low cost, further, even for lead-containing copper alloy piping equipment having a flow passage with a complicated shape, lead in the surface layer of a wetted section is effectively removed to surely meet the water quality standard in the elution of lead, and to provide the copper alloy piping equipment.;SOLUTION: The treatment method for reducing the elution of lead from copper alloy piping equipment such as a valve/pipe fitting is provided which comprises applying chemical polishing treatment to at least the wetted section of lead-containing copper alloy piping equipment 1 to remove lead 7 present in a state of being segregated over the surface layer 6 in the wetted part, and thereafter performing acid cleaning treatment or alkali cleaning treatment, thereby effectively removing lead. The copper alloy piping equipment treated by the method is provided.;COPYRIGHT: (C)2004,JPO&NCIPI