|Place of Origin:||Jiangsu , China|
|Certification:||ISO9001 , SGS , TUV , ASME , EN|
|Model Number:||Boiler Manifold Header|
|Minimum Order Quantity:||1 Set|
|Payment Terms:||L/C, T/T|
|Condition:||New||Working Temperature:||445 Degree|
|Type:||Ultra Super Critical||Material:||15CrMoG / 12Cr1MoVG|
|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.|
Header is not an independent component, but a part of water wall, economizer, super-heater and other components, that is, there are water wall header, economizer header, super-heater header. The function of header is to collect or distribute steam and water working fluid, reduce the pipeline of working substance transportation and connection, and reduce the numbers of holes in the drum, which is conducive to improving the safety performance of the drum. The lower header of the water wall near the grate on the both sides of the furnace wall prevents coking on both sides of the grate, so it is called the coke-proof box.
The header is actually a thick diameter tube connected with many heating surface pipes. It is made of seamless steel pipe and welded flat heads(end caps) at both ends. There are many holes in the box for welding or expanding the pipe. Both ends of the economizer tube and the superheater tube are connected to the header, and the lower end of the water wall is connected to the header. The upper end can be connected to the header, and a few pipes can be drawn from the head to the drum, or the upper end of the water wall tube can be directly connected to the drum.
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.
|Material||Carbon steel,Alloy steel,Stainless steel.|
|Length||According to costumes requirements.|
CFB distributing economizer header with high welding technique 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.