Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Abrasion on boiler tube

Status
Not open for further replies.

stefanwm

Industrial
Joined
Aug 17, 2008
Messages
1
Location
DE
Hi Experts,

Can anybody suggest a coating material (e.g. HVOF)that can protect boiler tubes ST35.8I (A106 GrB)which are exposed to 650 deg C exhaust gas from biomass combustion systems? The tubes are cleaned with a shot ball (steel balls 3 mm) system and therefore the mechanical wear is heavy. Tubes have to be replaves every 6 months. The idea is to coat the 3 first rows of tubes against the mechanical impact of the steel balls. Tube size is between 3-5 in. Coating with inconel 625 would increase the hardness from about 300 to 1000 Vickers hardness but this material is more for corossion problems than for abrasions. Since the flue has gaps are narrow, the coatig should be thin.
Thanks for any sugesstion.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top