Eco-friendly Superior Boiler Manifold Headers for Industry and Power Station
Product Information
| 1 | Headers form an important part of all types of boilers. |
| 2 | Steam from the generating tubes is collected in headers which are therefore always under pressure. |
| 3 | This pressure may vary from 300 psi to 2000 psi. Since headers are always under pressure, the utmost care is taken by us while fabricating them. |
| 4 | Depending on the generating capacity of the boiler the header sizes fabricated by us vary from 100 mm to 600 mm NB. The stubs of various sizes are very carefully welded to the main body of the header to provide the desired openings from the header. |
In order to improve the efficiency of boilers, cylindrical boilers are gradually developed into tubular boilers to increase the heat transfer area.
The water from the pot barrel flows into the lower box through the downspout, which is distributed to each tube bundle. The water in these tube bundles continuously absorbs heat energy and collects in the upper box before flowing back into the pot barrel.
We call the upper and lower box box or header box.
Header (also known as header), is an important part of the boiler, divided into upper header and lower header.
Functions
The collecting box 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.
Attention
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.
Specification
| Material | Carbon steel,Alloy steel,Stainless steel. |
| Length | According to costumes requirements. |
| Temperature Range | 300℃~1500℃ |
| Diameter(OD) | 76mm~914mm |
Certification
Company Introduction
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 System.
Hua Dong Boiler Co., Ltd. is a high-tech enterprise specialized in manufacturing boilers.
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.
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