Vendor document number;All joints on the above drawings shall be given a specific unique weld number;All weld numbers shall be entered on an agreed welding history sheet that shall carry the relevant drawing number and the applicable revision indicator;NDT techniques and percentages shall be entered against each weld on the welding history sheet;All NDT reports shall be uniquely numbered and the report numbers shall be entered on the welding history sheets against the relevant weld numbers;Visual inspection reports and PWHT reports shall also be recorded on the history sheet for each weld.