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Tube Serpentuator Gas Shielded Arc Welding Boiler Revamping And Modification Coil
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Brand Name:HD BOILER
Model Number:Superheater and Reheater
Certification:ISO9001 , SGS , TUV , ASME , EN
Price:Negotiable
Payment Terms:L/C, T/T, Western Union
Supply Ability:1500 Tons / Month
Delivery Time:50 ~ 100 Days
Company Data
Verified Supplier
Contact Person
Sandy Chen
Business Type:
Manufacturer Trading Company
Officials:
Address: N0.1, Dongli Road, Donglai, Zhangjiagang City, Jiangsu Province, China
Quality:
Quality Certifitation Available
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Product Details
Company Profile
Product Details
Superheater and reheater tube serpentuator gas shielded arc welding revamping and modification
Superheater & Reheater Serpentuator
Description
| The temperature of steam in boilers depends on the pressure but whilst it is in contact with the water it never exceeds the boiling point for that pressure. |
| This is referred to as the "saturated steam" temperature. So long as the pressure and temperature remain the same the steam will not contain water and is referred to as "dry saturated steam". |
| As the steam travels from the boiler to the engine,however,despite insulation of the pipework etc,it will experience a drop in temperature and condensation will immediately result. |
| Condensation will also occur when the steam comes into contact with the cooler cylinder walls and,as energy is extracted from the steam in the cylinders by performing work on the piston, a further drop in temperature will occor resulting in further condensation. |
| Apart from the resulting loss of efficiency,the presence of incompressible liquid water in the cylinder is potentially disastrous. |
| If it were trapped between the piston and the cylinder end-cap it could result in the end being blown off. |
Advantages & Disadvantages
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. |
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.
Historical review
| ·Steam-dryers and steam-traps can remove condensed water from the pipes,and steam-jacketing can reduce cylinder condensation they do not eliminate the problem. |
| ·It was realised in the 19th century that once the steam was removed from proximity with water in the boiler it could receive additional heat and its temperature could be raise above the boiling point. |
| ·This is referred to as "superheating". |
| ·With sufficient additional heat,the rise in the temperature of the steam would more than compensate for the fall in temperature as it passed through the pipe-work and engine and condensation could be eliminated. |
| ·Tube failure is one of the leading causes of forced outages in power plants. One of the key ways of preventing failure is to predict the remaining useful life of tubes. |
| ·By gaining an accurate assessment of the predicted lifespan of the tube, power plant operators have the necessary information to make decisions on prioritising future inspections, and whether to run, repair or replace tubes. |
| ·How we analyse the remaining useful life of tubes: |
| ·The lifespan of a superheater or reheater tube is affected by time, temperature and stress. |
| ·To measure the remaining useful life of the tube, information on the steam pressure, original and present wall thicknesses and the tube’s outside diameter (OD) is used to calculate the stress history of the tube. |
| ·The steamside scale thickness is used to gauge the effective temperature history of the tube. |
| ·The stress history and the effective temperature history are compared to the creep rupture material of the specified tube material. From this information, the remaining useful life of the tube can be calculated – as well as the temperature profiles across the boiler. |
| ·Hot spots and wastage patterns can also be identified. |
Product Function
| The function of the superheater in the thermal power plant is to remove the last traces of moisture ( 1 to 2%) from the saturated steam coming out of boiler and to increase its temperature sufficiently above saturation temperature. |
The super-heating heating raises overall overall cycle efficiency efficiency as well as avoids too much condensation in the last stages of the turbine which avoids the blade erosion. |
| The heat of combustion gases from furnace is utilized for the removal of moisture from steam and to superheat the steam. |
| Super-heaters usually have several tube circuits in parallel with one or more return bends, connected between headers. |
GMAW
Company Profile
Zhangjiagang HuaDong Boiler Co., Ltd.
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. 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" boilers include Utility Boiler, HRSG Boiler, coal-fired , oil(gas) -fired, coal-water-slurry-fired and garbage-fired steam/hot water boilers, organic heat carrier boilers, etc., and Boiler spare parts (Economizer, Finned tube, Header, Steam drum, Superheater, Water wall panel, Air preheater, Cyclone separator, etc., which are widely used in power generation, heat supply, chemical engineering, textile, food, paper, road building, plastic, rubber and wood working industries. "HD" boilers are honored as "Famous Production in Jiangsu Province", " Jiangsu High-Tech Product" and "Jiangsu Energy-Saving Product". "HD" brand is a "Famous Brand in Jiangsu Province". We are a qualified supplier for the top three boiler manufacturers in China(Harbin Boiler Co., Ltd., Dong Fang Boiler Group Co., Ltd., Shanghai Boiler Works Ltd.,). So far, Hua Dong Boilers have served 10000 customers, which sell well all over China and are exported to USA, Australia, Russia, Kazakhstan, India, Indonesia, South Africa, Brazil, and Southeast Asia.
We strive to manufacture "Safe, Efficient, Energy-Saving and Environment-Friendly" boilers, provide new-type products in excellent quality, serve users sincerely to their satisfaction, and be a top supplier of boilers in China.
Declaration
Zhangjiagang Hua Dong Boiler Co.,Ltd has no subsidiaries.
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Company Business
Our products have been wildly used in power plants and large international companies overseas.
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