20G Seamless High Strength High Pressure Boiler Tube
Boiler tubes are widely used in power station construction,
especially 20G boiler tubes, ASTM/ASME boiler tubes for various
purposes.
| Item | Material | Standard | Specification(OD*WT)mm |
High-pressure boiler pipe | 20G | GB5310 |
14-630*2-80 |
20G of boiler steel pipe is included in GB / 5310 steel grade
(foreign corresponding brand: Germany ST45.8, Japan STB42, the
United States SA106B, as the most common boiler steel pipe, it has
a certain temperature and high temperature strength, low carbon
content, better plasticity and toughness, good cold and hot forming
and welding performance.20G seamless high strength high pressure
boiler tube is mainly used in the manufacture of high pressure
boiler tube and higher parameters, low temperature superheater,
reheater, economizer, water wall, etc.
Application of 20G Seamless High Strength High Pressure Boiler Tube
- Steam Boilers
- Power Generation
- Fossil Fuel Plants
- Electric Power Plants
- Industrial Processing Plants
- Cogeneration Facilities
Chemical Composition of 20G Seamless High Strength High Pressure Boiler Tube:
| Chemical elements | Data |
| Carbon | 0.17-0.24 |
| Silicon | 0.17-0.37 |
| Manganese | 0.70-1.00 |
| Phosphorus(max) | 0.03 |
| Sulfur(max) | 0.03 |
| Chromium(max) | 0.25 |
| Molybdenum(max) | 0.15 |
| Cuprum(max) | 0.2 |
| Nickel(max) | 0.25 |
| Vanadium(max) | 0.08 |
Mechanical Properties of 20G Seamless High Strength High Pressure Boiler Tube:
| Properties | Data |
| Yield Strength (Mpa) | ≥415 |
| Tensile Strength (Mpa) | 240 |
| Elongation (%) | 22 |
The W.T. tolerance of 20G Seamless High Strength High Pressure Boiler Tube:
| W.T.(S) | Tolerance of W.T. |
| <3.5 | +15%(+0.48mm min) |
| -10%(+0.32mm min) |
| 3.5-20 | +15%,-10% |
| >20 | D<219 | ±10% |
| D≥219 | +12.5%,-10% |
Delivery Condition:
Annealed, Normalized, Normalized and Tempered
Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile
Strength,Yield Strength, Elongation, Flaring, Flattening, Bending,
Hardness, Impact Test), Surface and Dimension Test,No-destructive
Test, Hydrostatic Test.
Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
FAQ:
1. Can I request to change the form of packaging and
transportation?
A: Yes, We can change the form of the packaging and transportation
as per your request.
2. Can I request to advance the shipment?
A: It depends on whether there is sufficient inventory in our
warehouse.
3. Can you produce the products according to my own drawings?
A: Yes, we can produce the products according to your drawings.
4. What's your terms of payment?
A: T/T, L/C.
5.Do you accept custom design on size?
A: Yes, if the size is reasonable.
