4　Furnace Non-standard Equipment

4.1　General Requirements

4.1.1　The mechanical equipment of furnace shall be manufactured and installed according to the requirements in the design and technical documents.Any modification，if necessary，shall be conducted after relevant design alteration is approved.

4.1.2　The mechanical equipment of furnace shall，before delivery，have certification.

4.1.3　The mechanical equipment of furnace shall have the complete set of installation quality records and the documents.