New type Corner-pipe steam boiler and hot water boiler:

1, Drum be installed outside

2, Four corner with drop pipe also can dupport the drum,and them don't be heated.because they are outside of furnace.

3, Furnace be packaged with whole water cooling wall pipe, no welding so that don't loose the heat.

4, More high effective, can increase 20% effective than normal boiler.

5, More safety and more long-life.