SGS Standard Industrial Horizontal Boiler Manifold Headers with
Boiler Manifold Header is a kind of tube for mixing working
substance of boiler and ensuring uniform heating of working
substance.Industrial boiler furnace wall is usually composed of
rows and rows of tubes (water wall) together, but boiler huge
volume, complicated structure, cannot guarantee that all the
working medium in the pipe of heat absorption capacity is the same,
different parts of heat absorption differs a lot, install header
can let each pipe working medium inside converge here, the
redistribution to the next level in the tube, so that we can reduce
the thermal deviation, make the working medium heat, cooling flow,
boiler, the boiler thermal efficiency are optimized to improve;In
addition, the size, quantity and layout of the pipes in the upper,
middle and lower parts of the boiler are different.
Installation and Welding of Pipe Joints
Generally, there are two kinds of pipe joints on the header barrel
body. One is the large-diameter pipe joints with a diameter of more
than 101.6mm, such as the hand-hole pipe joints and seats opened
near the header end cover and ring joints.The other is a small
diameter pipe joint with a diameter of less than 101.6mm, which is
used for combination welding of the header and the tube screen of
economizer, superheater and reheater.A large number of closely
spaced small diameter pipe joints are welded on the whole length of
the header barrel, some are short pipe joints with a length of less
than 300mm, and some are long pipe joints with a length of 300 ~
1700mm bent into a certain shape.
- The pressures and temperatures that headers have to withstand
depend on the component to which they are connected. A header
connected to an economizer or to water wall panels is subject to
less severe requirements on the material than a header connected to
superheaters or reheaters.
- Depending on the temperature and pressure of headers, Vallourec
supplies tubes in carbon steel to high-alloy ferritic steels such
as T/P91 or T/P92, with sizes ranging from 88.9 mm to 406.4 mm.
If there exists straw hat , iron and other sundry in manifold
headers, when power plant is running, it is easy to cause boiler
stop accidents such as booster.So the header cleanliness must be
1. Strength calculation report with applied materials information.
2. 100%NDT(non-destructive inspection) report of steel plate, tube
and welding rod.
3. 100%X-ray inspection report (welding seam): to ensure the
quality of the entire boiler.
4. Hydraulic test report: ensure the standard working pressure and
Design and development
Collect all parameters for product design, make design acording to
the Supervisory Regulations on Boiler Safety Technology, other
laws, rules, regulations and professional standards, and 100% meet
the product standards and customers' requirements.
Supervision and confirmation
The quality and technical supervision administration authorizes the
inspection agency stationed on site to supervise, inspect and test
the process of boiler manufacturing.Accept supervision or
confirmation of the third party or Customer's representative over
the process of boiler manufacturing.
|Material||Carbon steel,Alloy steel,Stainless steel.|
|Length||According to costumes requirements.|
- Hua Dong Boiler Co., Ltd. is a high-tech enterprise specialized in
- Established in early 1985s, has two manufacturing bases, this
company covers 400,000 ㎡ with fixed assets amounting to USD
110,000,000. There are 1100 employees including 150 technicians and
600 coded welders.
- Hua Dong holds the manufacturing licenses for Grade A boilers and
Grade A1&A2 pressure vessels issued by Chinese General
Administration of Quality Supervision, Inspection and Quarantine;
also it holds the "S" and "U" "NB" stamps issued by American
Society of Mechanical Engineers; meanwhile, this Company has passed
the certification of ISO9001, SO3834, EN12952 Quality Management