The procurement is for a framework agreement for contract work in the form of welding and muffing of district heating pipes (fv-pipes). As a part of district heating development, the contracting authority has, in periods, a need for extra capacity. Typical work assignments that are included in this contract (not exhaustively, other assignments can occur):  ·         Welding on county road pipes in the dimensions up to and including DN250 ·         Muffing on county road pipes in dimensions up to and including Ø 450 mm. The work place will be on the Contracting Authority's projects/sites in Nord-Jæren. Most of the contracting authority ́s district heating installations are located in Stavanger, Sandnes and Sola municipalities. The work will mainly take place outside in ditches in urban areas. Project work connected to district heating will mainly be carried out by the Contracting Authority's own installers/welders. The Contracting Authority can, however, use the Supplier for welding and movable work on district heating pipes at periods with many assignments and high activity. When working in ditches that can contain a lot of existing infrastructure, it can often be challenging to plan progress in a structured and rational way. The tenderer must expect to move between different projects, i.e. building and construction sites, within the working day/work period that each Call-off applies to. There may also be instances where the tenderer must move within a project during the work day.   The tenderer's personnel will be managed/led by the Contracting Authority's project manager and the Contracting Authority presents the necessary material and work basis/drawings.