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Boiler tubes

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high frequency welded (serrated) finned tubes (fin tubes)

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hot dipped galvanized oval (elliptical) finned tubes, rectangular fin tubes

condenser fin flat tubes

H / double H finned tubes (fin tubes)

Studded Pipes

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longitudinal finned tubes (fin tubes)

seamless finned tubes with two longitudinal opposite fins

casting alloy tubes

Tube finning machine

Aluminum plates, strips,foils

Aluminum welding wire rod

Aluminum tubes, profile

Economizer for Boiler

air-cooled heat exchanger (air cooler)

material

standard & specification

 
Austenitic steel grade TP 904L
Super-Austenitic Steels
TP 904L=UNS N08904=1.4539
This high-alloy austenitic is very resistant to attack from diluted sulphuric acid, phosphoric acid and acetic acid. It resists pitting in neutralchloride solutions. Its resistance to stress corrosion cracking in some hot chlorides is much superior to that of the lower nickel austenites. Thissteel has good formability and weldability. This material is present in all common standards like ASTM, DIN, BS and NFA, however with somedifferences. Design stresses up to 370°C are included in ASME II.
 
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