Audited Supplier
Boiler economizers are heat exchange devices with finned tubes that heat a liquid, sometimes water, up to however sometimes doesn't exceed the boiling purpose of liquid. We can manufacture three types of boiler economizer, bare tube economizer, H finned tube economizer and spiral finned tube economizer. H-finned tube economizer is high efficient heat exchanger economizer which is consisted of H-finned tubes.
Compared with bare tube economizer, H-finned tube economizer can enlarge the heat exchange area and reduce the number of tubes. It also can increase the flue gas flow area in order to reduce the flue gas flow speed and abrasion.
H-finned tube can be made as double H finned tubes , with high rigidness to fit long tube row.
The spiral finned economizer is a newly designed heat transfer equipment, consists of spiral fin tubes to overcome the serious abrasion and short service time.
(1) The economizer is a steam generation system as like a boiler. when the exhaust gas discharge from the engine cylinder through the exhaust valve it goes to the boiler for generate steam by heating of water.
(2) After those gas it goes through the economizer the remaining exhaust gas temperature is heated the water in economiser. it help to generate steam, and it is improving the efficiency and save the fuel consumption
(3) An economizer uses the waste heat from the boiler exhaust, that would otherwise be lost to atmosphere to (in most cases) preheat the feed water into the boiler.This improves the boiler efficiency and reduces fuel costs.
| Description | Boiler economizer |
| Material | Alloy steel, Carbon steel, SA210C ,SA213T22, etc. |
| Material standard | ASTM, EN or ISO etc. |
| Dimension | Customization |
| Weight | Min: 10 ton Max.:1000 ton |
| Smelting Process: | EF+LF + VD |
| Process | Material→Ingot → Hot/Cold-Rolling→ Heat treatment (Normalizing+ tempering) → Inspection →rough machining→UT →2nd Heat treatment →finishing machining →Inspection |
| UT standard | ASTM A388 or EN10228, etc |
Quality Control
1. Impact test and Strength calculation report with applied materials information.
2. 100%NDT(non-destructive inspection) report of steel plate, tube and electrode.
3. X-ray, γ-ray and liquid penetrant test inspection report (welding seam): to ensure the quality of the entire boiler.
4. Hydraulic test report: ensure the standard working pressure and safety.
HD Boiler offers a best in class facility,including:
- Fabrication area of 200,000 square meters
- 50 Engineers
- 150 Coded welders
- 60 Licensed Inspectors (including NDT level-lll instructors)
- Grade-ALicenses for Design and Manufacture boiler (issued by the State Administration of Quality Supervision and Inspection)
- ISO 90001:2008 Quality System
- ASME Certificate of Utility Boiler
- ASME'S' , 'U' and NB stamp authorization
