Superheater outlet headers P91 material

European Heathyards

Superheater outlet Z-headers in P91 for a UK fossil fuelled power station, built to BSEN 12952 with TIG, MMA and SAW welding, NDT and hydraulic test.

Superheater Outlet Z-Headers, 2 No. Wing Headers, 2 No. Centre Headers

Application: Heat-transfer for superheated steam generation

Boiler: Babcock & Wilcox

Date of manufacture: 2012

Manufacturing spec: BSEN 12952:2001

Manufacturing duration: 30 – 32 weeks

Materials & dimensions:

  • 362 mm o/d x 53mm thk – EN 102222-2 X10CrMoVNb9-1 – Header shell
  • 460 mm o/d x 65mm thk – EN 102222-2 X10CrMoVNb9-1 – Header shell
  • 48.3 mm o/d x 8.0mm thk – EN 10216-2 TC2 X10CrMoVNb91 – Top antler
  • 48.3 mm o/d x 8.0mm thk – EN 10216-5 TC2 X6CRNIMO 17-13-2 – Bottom antler

Weld procedures & processes:

  • P91 to P91 – TIG, MMA
  • P91 to P22 – TIG, MMA, SAW
  • P91 to 316 – TIG

Heat-treatment: Full resistance heating, monitored & reordered

Non destructive testing: 10% Radiography, 100% DPI / MPI, 100% U/T of Circ welds, 10% Borrow scope, 10% Hardness survey, 100% PMI

Third party inspector: Royal & Sun Alliance

Hydro-test: Full Hydraulic Test

Contact
European Heathyards