Tenders Are Invited For Reconstruction Of The Water Supply In Świętoszowicestreet Lower.

1. Subject Of The Orderthe Subject Of The Order Is The Comprehensive Execution Of Construction And Assembly Works Related To The Replacement Of The Existing Dn80 Steel Water Supply Network With A New Pe100 Sdr11 Pn16 Water Supply Network Along With Accompanying Fittings And Fragments Of Water Supply Connections To The Border Of Private Plots. The Investment Is Located At Dolna Street In Świętoszowice (Zbrosławice Commune) On Plots No.: 535/35, 532/35, 529/35, 578/1, 582/35, 537/35, 654/35, 655/35.1.1.Main Technical Parameters And Scope Of Works• Construction Of The Main Water Supply Network: Installation Of A Pipeline Made Of Pe100 Sdr11 Pn16 Pressure Pipes With A Diameter Of Ø 160 Mm (And Locally, In Accordance With The Project Description, Ø 110 Mm) With A Total Length Of Approx. 414.0 M. • Replacement Of Parts Of Water Supply Connections: Construction Of Connection Sections From The Planned Network To The Boundaries Of Private Properties Using Pe100 Rc Sdr11 Pn16 Dz32 Pipes. A Dn32 Flanged Wedge Gate Valve Should Be Installed At The Point Of Connection Of Each Connection. Length Of Connections 129 M. • Installation Of Fire Protection Fittings. And Network: O Delivery And Installation Of 4 Sets Of Dn80 Underground Hydrants With A Capacity Of 10 L/S, Together With A Dn80 Shut-Off Gate Valve (At A Distance Of 1 M From The Hydrant), A Telescopic Casing, A Cast Iron Street Box And A Concrete Base Plate 50×50×10 Cm. O Delivery And Installation Of 2 Pcs. Of Dn100 Flanged Wedge Gate Valves With A Soft Sealing.• Crossing The Świętoszowicki Stream: Trenchless Crossing Of The Water Obstacle By Suspending The Pipeline Under Existing Bridges (By The Commune) Using System Suspensions, With Thermal Insulation Made Of Mineral Wool.1.2.Technology And Conditions Of Execution Of Works• Trenchless Method: Laying The Network Should Be Performed Mainly Using Horizontal Directional Drilling Technology. Open Excavations Are Allowed Only In The Places Of Starting/Receiving Chambers And At Connection Points, And Only In Places Necessary For Technological Or Safety Reasons, Only With The Consent Of The Ordering Party. In Order To Ensure Proper Location And Protection Of The Existing Underground Infrastructure, The Contractor Is Obliged To Perform Control Excavations (So-Called Control Excavations) At Points Of Collision Or Proximity To Existing Networks.• Depth And Foundation: Cables Should Be Laid At A Depth Of Min. 1.40 M From The Ground Surface To The Top Of The Pipe. Required Sand Bedding With A Thickness Of Min. 20 Cm (For Open Trenches) And Backfill 30 Cm Above The Top Of The Pipe.• Marking And Location: A Location Cable (Min. 2.5 Mm²) Should Be Laid Directly Above The Pipe, Permanently Connected To Cast Iron Fittings (Only For Open Trench Methods). A Blue Pvc Warning And Signaling Tape Should Be Placed At A Height Of Approx. 50 Cm Above The Top Of The Pipe. Places Of Fittings Should Be Marked With Information Boards On Posts Or Buildings (Approx. 2.0 M High).• Co