D. Piece Marking and Color Coding
1. Piece mark numbers and field welds for shop fabricated piping are indicated on the piping drawings. Fabricated pieces shall be identified by the appropriate piece mark number and color code as indicated on the piping drawings. Piece marking shall be as listed in Attachment 01.
2. For austenitic stainless steel and nickel materials marking paint or ink shall not contain any chlorides, metal, or metal salts such as zinc, lead, or copper which cause corrosive attack upon heating.