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 /  / Power plants

Power plants

The notoriously restricted space conditions prevailing in power plant construction frequently call for the use of pipe bends. The large number of piping systems between the steam generator and the turbine are efficiently realized with the aid of specially designed pipe bends. Multiple or three-dimensional bends reduce the number of girth welds required. This is a great benefit, for girth welds in power plants are subject to regular time- and cost-intensive re-inspection. Pipe bends in grade P91 / P92 steel are used in conventional power plants with live steam temperatures of up to +600 °C as well as stainless steel bends in nuclear power plants, for example, in the area of the primary coolant system.

Project showcases

Constuction Projects: EPR-Reactors | AREVA (Delivery years: 2006-2011)
EPR reactor
Pipe bends for EPR reactor
Main Coolant Line (MCL) Hot Steam Line &
Feed Water Line
Material X2 CrNi 19.10 N2 16Mo3 & P355NH
Bends per NPP and tonnage for:
- Olkiluoto 3, Finnland
- Flamanville 3, Frankreich
- Taishan 1 and 2, China

16 / ~ 80 t
16 / ~ 80 t
32 / ~ 160 t

328 / ~ 1.000 t
119 / ~ 350 t
432 / ~ 1.350 t
Diameter 780 mm (ID) 400 - 925 mm (ID) bzw.
508 mm (OD) & 682 (ID)
Wall thickness 97 mm & 76 mm 19 - 50 mm resp.
32,5 mm & 44,5 mm
Radius 1,4D & 1,5D 1,5D - 3D

Replacement bends for AREVA–Nuclear | France (Delivery years: 1996-2016)
Pipe bend in AREVA plant
Main Steam Supply system (MSSS) Emergency Feedwater
System (EFWS)
Diameter 747.8 mm (ID) 114.3 mm (OD)
Material P280GH
Bends 118 30
Tonnage ~ 440 t ~ 2,5 t
Wall thickness 32.5 - 37 mm 7.4 mm
Radius 2.4D 3.5D

Power plant Neurath Block D-G | RWE (Delivery years: 2007-2010)
Power plant Neurath
Pipe bends for power plant Neurath
Main Steam & Hot Reheat Line Cold Reheat Line Feed Water Line
Diameter 250 - 1,080 mm (ID) 404 - 762 mm (OD) 350 - 500 (ID)
Material P92 P 91 13 CrMo 45 16Mo3 WB 36
Bends 114 58 22 46 71
Tonnage ~ 500 t ~ 110 t ~ 60 t ~ 115 t ~ 225 t
Wall thickness 15 - 97 mm 16 - 43 mm 32 - 64 mm
Radius 2D - 6.8D 2D - 4.6D

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© Salzgitter Mannesmann Grobblech GmbH
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