Boiler Big Pipes Steam Distribution Header carbon steel or alloy
steel seamless tubes saturated steam separation
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.
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.
1. Carbon steel:20G,SA-106B,SA-106C,etc.
2. Low-alloy thermal resistant
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.
Established in 1985,Zhangjiagang Hua Dong Boiler Co.,Ltd.(trading
as HD Boiler),produces power plant; industrial; waste heat; waste
incineration; biomass; organic heat carrier and electric steam
boilers. Coupled with a comprehensive range of heating surfaces, HD
Boiler brings to the market a unique service including boiler
design , fabrication, installation, maintenance and replacement of
boiler pressure parts.
1. Fabrication area of 200,000 square meters
2. 150 Engineers
3. 600 Coded welders
4. 60 Licensed Inspectors(NDT Level-III instructors)
5. Class-A Licenses for Design and Manufacture Boiler
6. ISO 9001:2008 Quality System
7. ASME Certificate of Power Boilers
8. ASME 'S','U' and NB stamp authorization
Our products have been wildly used in power plants and large
international companies overseas.
Such as USA, Brazil, Porto Rico, Guatemala, Spain, Demark, Norway,
Turkey, India, Korea, Australia, Middle East, Southeast Asia etc.