Sizing drop header

Steve Garson_6

I am going to re-pipe some poorly installed steam piping off a boiler that burns 490,000 BTU/hour. The Smith boiler has two 3-inch risers.

My plan was to pipe the two 3-inch risers to loop down to a 4-inch pipe that would feed three risers to feed the three mains for the building. Will the 4-inch pipe be large enough? Larger is so much more expensive.

Suggestions?

Steve

gerry gill

it would be sized

the same as called out in the manual for a standard header..i'm not sure what that would be for that brand..they probably have the manual online i would imagine.

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bob young

steam drum

Some of hb smith boilers i have done in the past had oversized steam drums in lieu of a conventional header. check their piping diagrams. a steam drum is the ultimate header.