Tenders Are Invited For Overhauling Repairing Coating Of Dn500 Pn10 Butterfly Valve

Quotation Are Invited For Overhauling Repairing Coating Of Dn500 Pn10 Butterfly Valve Overhauling Repairing Coating Of Butterfly Valve For Mushrif Reservoir Ph2 3 Make Erhard Size Dn500 Pn10 Please Contact Mr Fazalu 04 3229457 For Further Clarifications As Per Attached Specifications 1 0 Scope Of Work The Butterfly Valve Are Not Work Ing Properly For Which Dewa Intended To Outsource The Repairing Coating Job In Local Reputed Contractor Details Of The Butterfl Y Valve Make Erhard Nominal Diameter Dn300 Pressure Rating Pn10 Scope Of Works A Repairing Overhauling Of The Comple Te Butterfly Valve B Replacement Of The All Defective Spares Like O Ring Shaft Key Etc C Replacement Of Sealing Ring Bush If Indeed Requires D Trueness Check Of Drive Shaft Short Shaft If Requires Repairing Of The Shafts E Repairing Overhauling Of Gearbox And Replacement Of The Necessary Spares If Deemed To Be Replaced F Functional Pressure Test Of Butterfly Valve At Contr Actor Premises G Operational Test Of The Butterfly Valve Installed At Dewa Pipeline 2 0 Prior To Submission Of Quotation The Fol Lowing Shall Be Determined Carefully A The Contractor Shall Visit The Site And Make Himself Fully Familiar With The Work Scopes C Omplexities Etc Before Submitting The Quotation B Dewa Will Not Accept Any Claim For Extras Beyond The Order Rates Prices Dur Ing And After The Execution Of Work Ordered C The Contractor Should Submit The Time Schedule Bar Chart Indicating Each Activity D On Completion Of The Work The Inspection Checklist Of Quality Procedures Wherever Applicable Should Be Filled In And Submitted 4 0 Take Over On Completion Of All Work Within The Scope Of The Contract For Acceptance Of The Maintenance Work Contractor Shall Notify Dewa In Writing A Certificate Of Completion Will Be Issued By Dewa On Final Inspection Only When The Contract Work Is Deeme D To Have Been Taken Over By Dewa After Necessary Condition Monitoring Checks Wherever Whenever Required 5 0 Warranty A All The Work Carried Out Shall Carry A Warranty For 8000 Hours Of Operation Or 1 Year Whichever Is Earlier B The Guarantee Will Take Effec T From The Date Of Takeover By Dewa Of The Job Carried Out By The Contractor C When A Defect Is Noticed During The Period Of Warra Nty The Contractor Must Rectify The Defect Within A Reasonable Amount Of Time Fixed By Dewa With No Claim Or Compensation 6 0 Docu Ments On Satisfactory Completion Of The Work Handing Over The Contractor Should Submit The Following To Dewa A Inspection Report B Repair Action Report C Method Statement Of The Repairing Works D Photos Of Parts Of The Valv E Before After Repairing E All Test Reports Specification For Internal Coating Of Valve 1 1 Surface Preparation Before Applying A Ny Coating The Contractor Has To Do Necessary Surface Preparation By Sand Or Grit Blasting Or Any Other Suitable Mechanical System To Remove All Rust Loose Materials After Sand Blasting The Contractor Has To Intimate Dewa Engineer For Inspection Of The Surfac E Before Applying Any Coating During Sandblasting It Is Required To Protect All Machined Surface Seat Area And All Other Critical Areas And Parts From Damage By Suitable Method Buildup Filling Of Erroded Pitted Surface The Supplier Has To Buildup Eroded Surfac E By Suitable Composite Materials Up To Original Level Before Applying Any Coating The Composite Material Shall Have The Following Properties The Curried Composite Must Be Suitable For Continuous Immersion In The Following Chemicals At 21 0C 70 0F Ferric Ch Loride 10 Hydrochloric Acid 10 Sulfuric Acid 5 Nitric Acid 50 Sodium Hydroxide And 28 Ammonium Hydroxide The Composite S Hall Show No Blisters When Exposed To De Mineralized Water In An Astm C 868 Corrosion Test At 43 0C 110 0 F For A Minimum Period Of 6 Months Adhesion Of The Composite Per Astm D1002 Shall Be Greater Than 183 Kg Cm2 2 600 Psi The Curved Composite Must Meet Or Exceed The Following Physical Requirements Compressive Strength Astm D 695 914 Kg Cm2 13 000 Psi Tensile Strength Astm D 638 431 Kg Cm2 6 136 Psi Flexural Strength Astm D 790 620 Kg Cm2 8 800 Psi Flexural Modulus Astm D 790 6 9 X 104 Kg Cm2 9 87 X 105Psi During The Phases Of Surface Preparation Application And Curing Environmental Conditions Will Require Careful M Onitoring And May Require Supplemental Controls Critical Areas Of Concern Are Relative Humidity Dew Point Surface Temperature Of The Substrate And Air Purity Contractor Shall Carryout All The Procedures In A Controlled Environment In Accordance With The Lates T Standards And Procedures Final Internal Coating After Surface Preparation And Filling Up The Eroded Surface It Is Required To App Ly The Ceramic Reinforced Composite Materials For Final Coating The Composite Coating Materials Shall Have Following Properties Th E Cured Composite Must Be Suitable For Continuous Immersion In The Following Chemicals At 210C 700F Ferric Chloride 10 Hydrochlo Ric Acid 10 Sulfuric Acid 5 Nitric Acid 50 Sodium Hydroxide And 28 Ammonium Hydroxide The Composite Must Exceed 10 000 Hrs I N An Astm B 117 Salt Fog Test Scored With No Signs Of Under Film Corrosion At The Score The Composite Must Pass Astm G 8 Cathodic Disbandment Test For Not Less Than 60 Days The Composite Shall Show No Blisters When Exposed To Demineralized Water In An Astm C 8 68 Corrocell Test At 430C 1100F For A Minimum Period Of 6 Months Adhesion Of The Composite Per Astm D 4541 Shall Be Greater Than 140 Kg Cm2 2 000 Psi The Linear Co Efficient Of Thermal Expansion Astm C 531 Shall Not Exceed 5 0 X 10 5 Cm Cm 0C 2 8 X 10 5 In In 0F Thickness Of Coating 400 500 Microns Surface Finishing Of The Coating Shall Be Smooth Glass Surface Finished And Abrasio N Resistant The Cured Composite Must Meet Or Exceed The Following Physical Requirements Compressive Strength Astm D 695 844 Kg Cm2 12 000 Psi Tensile Strength Astm D 638 240 Kg Cm2 3 420 Psi Flexural Strength Astm D 790 562 Kg Cm2 8 000Psi T He Composite Shall Be Authorized For Usda Application For Incidental Food Contact The Composite Is Required To Have Potable Water Certification From International Local Authorities Wras Water Regulatory Advisory Society External Coating Epoxy Powder Coating In Blue Colour At Least 300 400 Micron Thick For The Valves All Necessary Surfaces Preparations To Be Done Before Coating Warrant Y The Supplier Has To Provide At Least 24 Months Of Service Warranty Against Any Damage Defects For The Coating If The Coating Is Found To Fail Within This Period The Supplier Has To Recoat The Equipment At Free Of Charge To Dewa Method Statement The Supplier H As To Provide Method Statement Of Coating And Material Details Along With Their Offer For Technical Evaluation And Approval Inspect Ion At Site Before Delivery Of Coated Valves The Coating Works To Be Inspected By Dewa Engineer At Supplier Workshop For Final Acce Ptance Contractor Shall Provide With All Required Necessary Inspection Tools As Required On Site Reports Documents During Deliv Ery The Following Documents To Be Submitted 1 Material Data Sheet 2 Photo Of Needle Valve Before And After Coating 3 Waras Cer Tificate For Coating Materials 4 All Test Reports Qty 4Overhauling Repairing Coating Of Dn500 Pn10 Butterfly Valve Please Contact Mr Fazalu 04 3229457 For Further Clarifications Standard Terms Conditions1 Prices Should Be Ddp Delivery Duty Paid At Dewa Stores 2 Quotation To Be Submitted Only In Local Currency U A E Dirhams3 Dewa Standard Payment Terms Is 30 Days Credit From The Date Of Acceptance Of Material4 No Dewa Staff Or His Or Her Relatives Up To Third Degree Should Have Ownership Or Partnership In Your Company And Your Participation In Dewa Tenders Rfqs Should Not Constitute A Conflict Or Perceived Conflict Of Interest

Refer document

FileName	File Description
Global Tender Document	Tender Notice