ASME AS335 Studded Tube AS335 P9
Studded Tube, ASME AS335 P9 Alloy Steel Seamless Pipe with 11Cr (SS409) Stud, Fired Heater, Furnace Application
ASTM A335 /ASME SA335 Gr. P9 Alloy Steel Studded Tubes are applied to convection chamber of heating furnace in petrochemical industry to increase the heat transfer coefficient at the fuming side. Studded Tubes are two or three times the square of light Tubes. Due to the usage of studded Tubes, the hot strength can be obtained as the same as radiation in the reasonable design. Studded tube is an integrated heat exchange part processed using power frequency contact type resistance welding and upsetting force fusion welding.
Equivalent Grades:
|
ASTM |
ASME |
UNS |
BS |
ISO |
JIS G 3458 |
|
A335 P9 |
SA335 P9 |
S50400 |
3604 P1 629-470 |
2604 II TS38 |
STPA 26 |
Advantage of ASME SA335 P9 Studded Tube (Studded Fin Tube) :
1>.Satisfying connection surface, little heat loss .
2>.Welding connection rate higher than 90 percent.
3>.No need of welding power, hardly any welding tumor .
4>.Narrow heated zone on the surface, no melted pool, without destroying the tissue of basic tube.
5>.Welding parameters are strictly set to ensure the quality of bulk studded tube and avoid the instability of manual operation
Chemical Composition of ASME SA335 P9 Alloy Steel Seamless Tube:
|
Compositions |
% |
|
Carbon(max.) |
0.15 |
|
Manganese |
0.3-0.6 |
|
Phosphorus(max.) |
0.025 |
|
Silicon(max.) |
0.5 |
|
Chromium |
4-6 |
|
Molybdenum |
0.45-0.65 |
Mechanical Properties of ASME SA335 P9 Alloy Steel Seamless Tube:
|
Tensile Strength, ksi [MPa], min |
Yield Strength, ksi [MPa], min |
Elongation (%), min |
|
60 [415] |
30 [205] |
30 |
Applications of ASME SA335 P9 Studded Tube:
1>.Heat Exchangers.
2>.Boilers.
3>.Air Coolers
4>.Oil Fire Furnace
5>.Chemical Industry
6>.Petromedical Industry
7>.Offshore Industry
8>. Fired Heater
9>.Heating equipment
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