A steam drum is a standard feature of a water-tube boiler. It is a reservoir of water/steam at the top end of the water tubes. The drum stores the steam generated in the water tubes and acts as a phase-separator for the steam/water mixture. The difference in densities between hot and cold water helps in the accumulation of the "hotter"-water/and saturated-steam into the steam-drum.
Working
The separated steam is drawn out from the top section of the drum and distributed for process. Further heating of the saturated steam will make superheated steam normally used to drive a steam turbine. Saturated steam is drawn off the top of the drum and re-enters the furnace in through a superheater. The steam and water mixture enters the steam drum through riser tubes, drum internals consisting of demister separate the water droplets from the steam producing dry steam. The saturated water at the bottom of the steam drum flows down through the down comer pipe, normally unheated, to headers and water drum. Its accessories include a safety valve, water-level indicator and level controller. Feed-water of boiler is also fed to the steam drum through a feed pipe extending inside the drum, along the length of the steam drum.
A steam drum is used without or in the company of a mud-drum/feed water drum which is located at a lower level. A boiler with both steam drum and mud/water drum is called a bi-drum boiler and a boiler with only a steam drum is called a mono-drum boiler. The bi-drum boiler construction is normally intended for low pressure-rating boiler while the mono-drum is mostly designed for higher pressure-rating.
On steam locomotives the steam drum is also called a steam dome.
Parameter
| Body Materials | Carbon Steel(20#,20G,SA192,A-1),Alloy Steel(15CrMoG,12Cr1MoVG,T11,T22)etc. |
| Type | Header body, end cover, tube joint, hand cole, thermometer socket;seamless steel tube, pressure parts |
| Advantages | Advanced welding, safe and reliable operation |
| Working Pressure | Depend on material |
| Standard | China GB, ASME |
| Dimension | Customization |
| Welding | SMAW, SAW,GTAW (TIG) |
| Manufacturing process | Material→Ingot → Hot/Cold-Rolling→ Heat treatment (Normalizing+ tempering) → Inspection →Drilling→Welding→RT, PT→ Inspection →Heat treatment →Hydraulic pressure test→Painting→Packaging |
| Remarks | Customized order is also accepted. |
Company Introduction
Established in 1985, Zhangjiagang Hua Dong Boiler Co., Ltd. (trading as HD Boiler), is a
professional industrial manufacturer, producing utility boiler,industrial boiler,HRSG boiler and all
kinds of boiler parts, such as waterwall panels, economizers, air preheaters, superheaters,
headers, spiral fin tubes, H-fin tubes, heat pipes etc.
We are the qualified supplier for the following large boiler manufacturers in China:
- Shanghai Boiler Works Ltd.
- Hang Zhou Boiler Group Co. Ltd.
- Dong Fang Boiler Group Co., Ltd.
- Wuxi Huaguang Industrial Boiler Co., Ltd.
- Jiangxi Jianglian Energy & Environment Co., Ltd.
- Suzhou Hailu Heavy Industry Co., Ltd.
· Fabrication area of 200,000 square meters
· 80 Engineers
· 200 Coded welders
· 30 Licensed Inspectors (including NDT level-lll instructors)
· Grade-A Licenses for Design and Manufacture boiler (issued by the State Administration of Quality Supervision and Inspection)
· ISO 90001:2015 Quality System
· ASME Certificate of Utility Boiler
· ASME‘S’ , ‘U’ and NB stamp authorization
