You are here: Home > Engineering
Material Selection
Bellows material selection under different media
Different bellows materials are available based on different media, please select them according to this chart:
Media | Recommended Materials | Preferred Materials |
Water | SUS304 | SUS316 |
Sea Water | SUS316L | INCOLOY825 |
Crude Oil | SUS316L | SUS316L |
Light Oil | SUS316 | SUS316L |
Heavy Oil | SUS304 | SUS316 |
Air | SUS304 | SUS316 |
Hot Air | SUS316 | SUS316L |
Steam | SUS316 | SUS316L |
Gas, LPG | SUS304,SUS304L | SUS316,SUS316L |
Boiler Exhaust | SUS304(High-Temp) SUS316L(Low-Temp) | SUS316L(High-Temp) INCOLOY825(Low-Temp) |
Diesel Exhaust | SUS304 | SUS316 |
Blast Furnace Gas | SUS316L | INCOLOY825 |
Coke Oven Gas | SUS316 | SUS316L |
Vessel Steam Pipe | SUS316L | INCOLOY825 |
Vessel LNG Pipe | SUS316L | SUS316L |
Low-Temp Oxygen | SUS316 | SUS316L |
Heat Exchanger | SUS304,304L SUS316,316L SUS321 | INCOLOY800H,825 INCONEL600，625 |
High-Temp Oil Ref Device | SUS321 | INCONEL600，625，INCOLOY800H |
Bellows material selection under acid base media
When the media is related to the acid-base materials, please refer to this chart for our suggestion:
Media | <30°C | Other Temperature | Near Boiling Point |
Hydrochloric acid | SUS316 | SUS316L | INCOLOY825 |
Sulfuric acid | SUS316, SUS316L | INCOLOY825 | INCOLOY825 |
Nitric acid | SUS316 | SUS316L | INCOLOY825 |
Acetic acid | SUS304, SUS316 | SUS316L | INCOLOY825 |
Phosphoric acid | SUS304 | SUS316 | SUS316L |
Carbonic acid | SUS304 | SUS304L | SUS316, SUS316L |
Oxalate | SUS304, SUS316 | SUS316L | INCOLOY825 |
Sulfite | SUS316 | SUS316, SUS316L | SUS316, SUS316L |
Alkali | SUS304 | SUS304L, SUS316 | SUS316, SUS316L |
Ammonia | SUS304 | SUS316 | SUS316, SUS316L |
Brine | SUS316L | INCOLOY825 | INCOLOY825 |
Bellows, weld end and flange material selection under different temperature
Here we introduce the materials selection for the parts of the expansion joints, like bellows, weld end and flange under different temperature:
Part | -45 ~ -5°C | -5 ~350°C | 350~450°C | 450~600°C | >600°C |
Bellows | SUS304，SUS316 | SUS304,SUS316 | SUS304 SUS316 SUS321 | SUS310S SUS321 SUS310 | INCONEL600,625 INCOLOY800H,825 |
Weld End，Flange | 16Mn 20#Steel | Q235-A 20#Steel | 16MnR 20gSteel | SUS304 SUS316 SUS321 | SUS304 SUS310S SUS321 |
