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(11) | EP 1 493 968 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Membrane wall |
(57) Membrane wall of an incinerator of which the steam pipes are made of carbon steel
provided with a stainless steel coating, e.g. Inconel 625, by means of helical welding.
The co-extending steam pipes are mutually welded together by a connection strip of
100% stainless steel fitted there between. The coating or strip of weld connection
contains less than 10 wt% Fe (iron). The used weld rod contains less than 3 wt% Fe. |