There is a so called white cast Iron called HR, I don't know if this
is the material used in your boiler but this material is similar to
ASTM A319 Class D and application area of this material is for non
pressure containing parts at elevated temperatures so in my opinion
should be suitable for your application. There is also mentioned a
class III (could be 3 of your drawing).
Best Regards
Herman Pieper
On 5 okt, 07:49, "M. Ali" <mali5...@gmail.com> wrote:
> Dear All,
>
> We have in our facility, 3 boilers. All of them have dual combustion
> burners.
> These boilers were manufactured by Babcock and Wilcox in 1962 and much
> of the paperwork regarding its construction and materials is now no
> longer available either to us or somewhere else.
> Coming back to the burners, diffuser plates (or impellers) are used
> for mixing and having an evenly distributed flame. The material for
> these plates in drawings is (HR -3), I do not understand what it
> means. The maintenance department had been using cast iron but it
> doesnt hold long enough.
> Please, if you know, share the meaning of the term H.R.3 or you might
> also indicate subsitute castable material.
>
> Thanks and Regards,
>
> Muhammad Ali
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