24590-G04B-F00006 Rev 49 (Revised 7/25/2017) Ref: 24590-WTP-3DP-G04B-00046 Drawing Change Notice Page 1 of 2 CHANGE DOCUMENT NO. 24590-BOF-M0N-DEP- 00001 JOB NO. 24590 TITLE FOR CHANGE NOTICE Updating Corrosion Allowance for DEP Evaporator Reboiler and DEP Evaporator Primary Condenser Data Sheets DOCUMENT NUMBER REV DOCUMENT NUMBER REV 24590-BOF-MBD-DEP-00001 1 24590-BOF-MED-DEP-00004 1 PART OF DESIGN CHANGE PACKAGE (DCP)? Yes No Justification for no DCP: Impacted SSC has not been turned over to the Plant Management organization. JUSTIFICATION FOR CHANGE The purpose of this DCN is to align with the corrosion evaluations (24590-BOF-N1D-DEP-00007, Rev. 0 and 24590-BOF-N1D-DEP-00009, Rev.1) for DEP Evaporator Reboiler (24590-BOF-MBD-DEP-00001, Rev.1) and DEP Evaporator Primary Condenser (24590-BOF-MED-DEP-00004, Rev.1). The tubesides (including heads) must have a corrosion allowance of 0.04 inch and the tubes (heat transfer surface) must have 0.0 inch. MARGIN ANALYSIS Is the drawing a line list or equipment datasheet AND is the change associated with a Q SCC? Yes No Supersedes Change Document Yes No ECN Needed Yes No REQUIREMENTS REVIEW Client Approval Required Yes No Interface Resolution Required * Yes No Address any “yes” answers in the description DESCRIPTION OF CHANGE The affected mechanical data sheets are being updated as follows: ` 1) 24590-BOF-MBD-DEP-00001, Rev.1 Before After (See this DCN) Issued by RPP-WTP PDC I • -- • • • • • --- Mechani ca l Design Data Shell Side Tube Side Design Pressure (Max/Min) psig 50 Full vacuum 50 Full vacuum Design Temperature (Max/ Min ) OF 300 40 175 40 Corrosion/Erosi on Allowance inch 0.04 o.o Shell ID inch Dimensions 33 (H (T-T) x D) ft. 12 4 :'. "H x 2' 9"D (Ref. 1) (Ref. 1) 8 Total Number of Tubes / 222 / Tube OD / Length Tube Thickness (Nominal) / (Minimum) 0.065" I 0.060" (Nominal) 1.5" / 8.0' (Ref. 1) (Ref. 2) (Ref. 2) Tube Pitch / Layout I Clearance 1.875" / Triangular / 0.375" No. of Tube Passes 2 (Ref. 2) (Ref. 2) Mechanical Design Data I This DCN I Shell Side I I Tube Side Design Pressure (Max/Min) psig 50 Full vacuum I 50 Full vacuum Design Temperature (Max/Min) OF 300 40 "'-...... ,t. ....... -v V ~-~-, 40 Corrosion/Erosion Allowance inch 0.04 y 0.04 (0 .0 for tubes) ) Dimension~ A_A )._ ' / Shell ID inch 33 (H (T-T) x D) ft. 12 4 :'."H x 2' 9"D (Ref 1) (Ref. 1) 8 Total Number of Tubes / 222 / Tube OD / Length Tube Thickness (Nominal) / (Minimum) 0. 065" I 0.060" (Nominal) 1.5" / 8.0' (Ref. 1) (Ref. 2) (Ref. 2) Tube Pitch / Layout I Clearance 1.875" / Triangular / 0.375" No. of Tube Passes 2 /Ref. 2) /Ref. 2)