Tenders Are Invited For Renovation Of The Utility Water Connection And Replacement Of Hydrants In The External Department In Bydgoszcz-Fordon Of The Remand Center In Bydgoszcz, Case Number Tp/3/Dkw/2026

The Subject Of The Order Is The Performance Of Construction Works In Accordance With The Documentation For The Task Entitled: Renovation Of The Utility Water Connection With The Replacement Of Hydrants In The External Branch In Bydgoszcz-Fordon Of The Remand Center In Bydgoszcz. The Scope Of Works Includes: 1. Dismantling The Existing Triline (Hexagonal Concrete Slab) Along The Route With The Material Set Aside For Reuse.2. Linear Excavation • Approx. 160 M, Depth Approx. 1.6 M. • Estimated 70% Mechanical Excavation, 30% Manual Excavation. • Earthworks From Excavations Suitable For Backfilling Should Be Stored Next To The Excavation. • Soil Not Suitable For Backfilling As Well As Rubble, Stones And Roots Should Be Removed. 3. Complete Reinforcement Of Vertical Walls Of Linear Excavations With Formwork. Earthworks Should Be Carried Out In Dry Soil.4. Making Backfill For Channels And Objects From 15 Cm Thick Loose Materials. 5. Making Backfill For Channels And Objects From Bulk Materials 30 Cm Thick. 6. Removal Of Excess Soil. 7. Installation Of Pipelines Made Of Pvc-U Pipes Pn10 Dn 90 X 4.3: • Installation Of Fittings With Socket Connections, • All Connections Must Be Tight And In Accordance With Technical Requirements, • Laying Of Cables Allowed At Air Temperatures From 0°C To +30°C, • Changes In The Direction Of The Route Should Be Made By Using Appropriate Fittings (Arches), • Hot Forming Of Bends On The Construction Site Is Not Allowed, • Cold Bending Of Pipes Is Allowed Up To 160 Mm In Diameter And 6 M In Length, While The Radius Of Curvature Of The Formed Arc Cannot Be Less Than 300 Times The External Diameter Of The Pipe. 8. Connection To The Building 1 And 2 From Pvc-U Pipes Pn10 Dn 90 X 4.3 - Pcs. 2 • End The Entrance To The Building With A 2 Valve. • Seal The Passage Through The External Partition. 9. Connecting The Pipeline To Node A Made Of Pvc-U Pipes Pn10 Dn 90 X 4.3 - Pcs. 1 • Connection To The Cut-Off Before The Existing Bolt.10. Installation Of Retaining Blocks To Prevent The Spigot End Of The Pipe From Slipping Out Of The Socket In Elbows, Bends, Tees And Socket Plugs. Retaining Blocks Can Be Prefabricated Or Made On-Site From Poured Concrete, Provided They Are Carefully And Intactly Supported By The Ground. 11. Installation Of The Hp80 Underground Hydrant - 2 Pieces • The Hydrant Set Must Consist Of: - External Underground Hydrant Ø 80 Mm, - Flange Gate Valve Ø 80 Mm - Telescopic Valve Housing, - Flange Elbow With A Foot Ø 80 - Stop Block. 12. Marking The Route Of The Pipeline Laid In The Ground With A Plastic Tape With A Metalized Insert. 13. Backfilling Of Excavations And Hardening The Area. • Required Degree Of Compaction Is=0.95. 14. Leak Test And Disinfection Of The Laid Section Of The Pipeline. • Before Putting The Water Supply Line Into Operation, The Following Should Be Performed: - Tightness And Strength Test, - Preliminary Rinsing Of The Pipe To Remove Mechanical Impurities, - Disinfection To Remove Bacteriological Imp

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