Pori Energia Oy is investing for new biomass power plant in Aittaluoto. The construction of the new power plant will be completed by mid-2020 and once in operation it will replace some of the boiler capacity at Aittaluoto. Capacity of the boiler will be around 90 MW and it will supply heat to the city of Pori, process steam to neighbouring industrial clients and power to the grid. The new plant uses biofuels, peat and can also use solid recovered fuel (SRF). This supply consists of Steam piping contract includes following systems:

— main steam (13,9 MPa, 545 degC), material X10CrMoVNb9-1, DN size up to 250,

— 15 bar reduction steam (1,7 MPa, 501 degC) 13CrMo4-5, DN size up to 200,

— 15 bar steam distribution (1,7 MPa, 275 degC), DN size up to 200,

— 3,5 bar reduction steam (0,5 MPa, 501 degC) 13CrMo4-5, DN size up to 600,

— 3,5 bar steam distribution (0,5 MPa, 250 degC), DN size up to 700,

— safety valve and silencer piping,

— drain piping with steam traps and header.

Scope of work includes:

— pipes and pipe parts (including for example bends, elbows, reducers, Y-pieces, T-pieces, condensate pockets) material, prefabrication and installation,

— installation of piping related equipment, for example reduction station, valves and silencers,

— primary and secondary supports (tertiary superstructure by building contractor),

— scaffolding,

— all needed documentation according PED 2014, EN12952 and EN13480.

The following detail design is included in the Suppliers's scope of work:

— final stress analysis and strength calculations, the purchaser will deliver preliminary stress analysis,

— non-standard pieces calculation and workshop drawings, for example live steam header, turbine transition piece,

— the supplier will make detail design to the purchaser's PDMS 3D-model on the Purchaser's preliminary design,

— detail isometric drawings,

— detail support drawings.

Note! Piping supplier is the fabricator of the piping and shall give CE-marking of its scope of work according PED2014. The design, all works, testing and inspections shall be done in boiler side according to standard EN12952 and turbine side (after main shut-off valve)according to EN13480. The all needed design documents according to EN12952 shall be given for boiler manufacturer.