Heat Treatment PWHT Superheaters and Reheaters Coils Annealing with
High Quality
Product Description of superheater coil
1.A super-heater is a device used to convert saturated steam or wet
steam into superheated steam or dry steam.
2.It is used in power stations.
3. Super-heaters are used in steam engines or in processes, such as
steam reforming.
4.There are three types of super-heaters: radiant, convection, and
separately fired. A super-heater can vary in size from a few tens
of feet to several hundred feet (a few meters to some hundred
meters).
1.Re-heaters are the same as the super-heaters but as their exit
temperature is a little bit less than super-heaters and their
pressure is 20%-25% less than the super-heater, they can stand less
quality material alloys.
Differences of superheater coil
| Type | Advantages | Disadvantages | Supporting method |
| Pendant-type | 1.Firm structural support | 1. Flow blockage by condensed steam 2. Needs slow restart to purge
the water that accumulates in the bottom. | supported from above |
| Inverted-type | 1.Proper drainage of the condensed steam | 1. Lack the structural rigidity, especially in high speed gas flow | Supported from below |
| Horizontal -type | 1. Proper drainage 2. Good structural rigidity. | 1. They do not view the flam directly so they are mainly from the
convective type | Usually supported in the vertical gas ducts parallel to the main
furnace. |
Details
1.Material composition
Carbon steel, alloy steel or heat-resistant steel, collection boxes
and other supporting material. Tubes are customized types of
specifications.
2.Design pattern
Vertical or horizontal layout.
3.Advantages
Beautiful appearance, size, accuracy, first-class bending and
welding technology, first-class detection equipment.
4Manufacturing and acceptance criteria
1).JB/T1611 " Technical specification for manufacturing of boiler
pipes."
2).JB/T1612 "boiler pressure test technical conditions. "
3).JB/T1613 "Technical specification for welding of pressure parts
of boiler."
4).JB/T1615"Technical specification for painting and packing of
boiler."
5).JB/T3375 "Rules for receiving acceptance of materials for boiler
construction."
Testing Equipment
Company Introduction
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
Products delivery
