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Place of Origin : Zhangjiagang,China
Brand Name : HD Boiler
Certification : ISO9001,ASME,,EN,CE
Model Number : Manifold water wall header
MOQ : 3
Price : $1,200-1,500
Type : Natural Circulation
Structure : fire tube and water tube
Pressure : Low / High Pressure
Steam production : Max. 20t/h
Style : Horizontal
Fuel : Coal / Gas / Coal-fired / Water Heat
Output : Hot Water / Steam
Surface Treatment : Painted
Diameter (OD) : ∅76mm~∅914mm
Max Length : 23000mm
Temperature Range : 300~1500℃
Material Options : 20G, SA-106B, SA-106C, 15CrMoG, 12Cr1MoVG, SA-335P12, SA335-P22, SA-335P91, SA-335P122, SA-335P92
Header Types : water wall header, superheater header, economizer header
Construction Type : end cover type or necking down type
Operation Mode : Steam distribution with bypass and drain valves
htp boilers
Condensate pipe htp main boilers
Product Description
Steam distribution headers are fabricated out of carbon steel or alloy steel seamless tubes. Customised or tailor made items are offered. Headers, after fabrication, are stress relieved to make the Steam distribution headers free from stresses.They are big pipe headers that transfer water from the downcomers to the risers through a combustion zone where the water gets partially heated to steam from the heat of fuel combustion.
Operation
In bringing a boiler on the line with other boilers on a header system,certain precautionss are necessary to avoid water hammer and excessive temperature gradients in the piping.Adequate drainage and warming of the piping will eliminate the risk of water hammer.The judicious use of bypass valves around main header valves will avoid steep temperature gradients.Header drains should be operated.The steam line from the boiler to the header should be brought up to temperature by operationg bypass and drain valves.When up to temperature and line pressure,the header valve may be opened wide and the bypass closed.
Technical parameters
| Diameter(OD) | ∅76mm~∅914mm |
| Length(Max) | 23000mm |
| Temperature(℃) | 300~1500 |

Application
The steam boiler pressure part header with large diameter longitudinal welded pipe have water wall header, superheater header, economizer header and so on, it acts as collection, mixture, re-distributing working medium, as the structure, it can be classified as the end cover type( end enclosure) and necking down type.
1. Carbon steel:20G,SA-106B,SA-106C,etc.
2. Low-alloy thermal resistant steel:15CrMoG,12Cr1MoVG,SA-335P12,SA335-P22,etc.
3. Middle-alloy thermal resistant steel:SA-335P91,etc.
4. Special material(ultra-supercritical):SA-335P122,SA-335P92,etc.
The boiler headers have water wall header,superheater header,economizer header and so on. It acts action of gathering, mixing and redistribution in boiler systems. In structure, they include end cover hinders or necking hinders.

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High Safety Level Boiler Manifold Header with 1 Year Warranty and 5 Years Core Components Warranty Images |