Tenders Are Invited For Delivery Of Pipes And A System Of Elements For Heat Pipes With Heat Carrier Hot Water, According To Set Technical Characteristics And Installation Of Connecting Sleeves For The Heat Transfer Network

Characteristics The Steel Pipes And Those Inserted In Pit, Etc. Pi Elements To Match: Max. Performance Indicators: T=130°С And Рн=2.5 Mpa Steel Brand Р235гн (Or Higher Grade), Seamed Steel Pipes Complying With Bds En 10217-2:2019 Welded Steel Pipes For Pressure Work. Technical Terms Of Delivery. Part 2: Electrowelded Tubes Of Non-Alloy And Alloy Steel With Specified Properties At Elevated Temperature Or Bds En 10217-5:2019 Welded Steel Tubes For Pressure Service. Technical Terms Of Delivery. Part 5: Submerged Arc-Welded Non-Alloy And Alloy Steel Tubes With Specified Elevated Temperature Properties Ed. Length Of The Pipes: 12 M., Length Of The Free Weldable Ends Of The Pit: 160±10 Mm.; The Diameter Of The Bare Steel Pipe And The One Embedded In Pit: Nominal Diameter Dn (Mm) - 900 Outer Diameter Of The Steel Tube D (Mm) – 914 Wall Thickness Of The Steel Tube S (Mm) – 10 Insulation Of Pit, Etc. Pi Elements To Be Filled With Polyurethane System With Cyclopentane Foaming Agent. The Polyethylene Casing Pipe Must Be Treated With A Crown Effect For Better Adhesion To The Polyurethane Insulation. The Coefficient Of Thermal Conductivity Of The Insulation Must Be Less Than 0.027 W/M.K. At 50°C Before Aging And Foam Density At Any Point Not Less Than 60 Kg/M3. Diameter And Thickness Of The Insulation And Thickness Of The Sheathing Pipe: Nominal Diameter Dn (Mm) – 900 Outer Diameter Of The Casing Pipe D (Mm) – 1100 Thickness Of The Wall Of The Casing Pipe S (Mm) – 10 Connecting, Electrowelded Sockets: Lengths And Dimensions Corresponding To The Pre-Insulated Pipes And Fittings In Order To Ensure The Convenience And Quality Of The Muffling; Supplied With A Protective Foil From The Suns Rays; Complete With Outer Sleeve For Muffling; Complete With The Necessary Materials To Connect The Wires To Control Leaks; Leak Detection System Requirements: A System For Tracking Leaks That Have Occurred By Means Of Two Pairs Of Embedded Copper Wires According To The Nordic Wire Type Monitoring System; The System Must Have A High Electrical Resistance Of The Insulation: Not Less Than 10 Mω - Insulation Resistance /Conductor-Pipe/; Wire Resistance - Not More Than 1.5 Ω/100 M.; The Manufacturer Presents/Accompanies The Delivery With An Electrical Diagram For Connecting The Cables Of The Pre-Insulated Pipes And Elements