ASTM A335 Gr P9 Alloy Steel Studded Finned Tube for Heating Furnace
YUHONG Group can make kinds of industry projects and supply variety
of extruded fin tubes in industries. All of our products are
domestically sourced, developed, and produced, that means our
customers have easy access to exactly the products they need for
their particular application. Besides, we can make sure that you
can get products with highest quality and manufacturing standards
and a local, concerned, customer service presence!
Features Of Finned Tube
1. An energy-efficient heat exchange component, with high heat
transfer efficiency and high bearing pressure, best adapted to high
temperatura areas
2. using power frequency contact type resistance welding and
upsetting force fusion welding
3.adopts dual-torch metal tumor-free welding. Welding precision is
ensured
4.The studded tubes welder is a mechanical-electrical integrated
welder.the operation is simple and reliable,with stable and
convenient performance
Fin tubes can use at very high temperatures possible because the
strong connection between fin and base tube prevents loosening of
fin because of heat stress, oxidization, corrosion etc. Studded
Tubes are applied to convection chamber of heating furnace in
petrochemical industry for increasing the heat transfer coefficient
at the fuming side. Studded Tubes are two or three times the square
of light Tubes and because of the usage of studded Tubes, the hot
strength can be got as the same as radiation in the reasonable
design.
Specifications For Various Types Of Finned Tubes
| Type | Description | Base tube | Fin specification (mm) |
| O.D. (mm) | Fin pitch | Fin height | Fin thick |
| Embedded | G-type fin tueb | 16-63 | 2.1~5 | <17 | ~0.4 |
| Extruded | Single metal combined metal | 8-51 | 1.6~10 | <17 | 0.2-0.4 |
| Low fin tube t-type fin tube | 10-38 | 0.6~2 | <1.6 | ~0.3 |
| Bamboo tube corrugated tube | 16-51 | 8.0~30 | <2.5 | / |
| Wound | l/kl/ll type fin tube | 16-63 | 2.1~5 | <17 | ~0.4 |
| String | String fin tube | 25-38 | 2.1-3.5 | <20 | 0.2-0.5 |
| U-type | U-type tube | 16-38 | / | / | / |
| Welding | HF-welding fin tube | 16-219 | 3~25 | 5~30 | 0.8-3 |
| H/HH type fin tube | 25-63 | 8~30 | <200 | 1.5-3.5 |
| Studed fin tube | 25-219 | 8~30 | 5~35 | φ5-20 |
Tube Material : Materials Carbon Steel ,Alloy Steel (P5,P9,P11, P22),Stainless Steel and Corrosion-resistance Steel and etc.
This page is about ASTM A335 Gr. P9 studed alloy steel fin tube,
studed fin tubes with fin general material carbon / alloy /
stainless steel , we sell these fin tubes more than 33 years and
sell in over 70 countries.
General Specifications
Base Tube/Pipe Size: Min 2” Nb To Max 8” Nb Pipe
(A106GrB, A335 P11, P22, P5,P9,A312,TP304, TP310S, TP316H, TP321H,
TP347H.)
Stud Height: Min 0.5” (12.7 Mm) To Max – 2.5” (63.5MM)
Stud Diameter: Standard Size Is Circular For Extended Portion 0.5”
(12.7MM) (or Be Changed As Per Customer Requirement)
Stud Spacing : 0.625” (15.875 Mm) Or 63 Studs Per Plane Per Meter
(or Be Changed As Per Customer Requirement)
Thickness:4-20mm or other
No fin area on both side: As Customer's request and drawing
Detailes Of ASTM A335 Tube P9 S50400
ASTM A335 This specification covers nominal wall and minimum wall seamless
ferritic alloy-steel pipe intended for high-temperature service.
Pipe ordered to this specification shall be suitable for bending,
flanging (vanstoning), and similar forming operations, and for
fusion welding. Selection will depend upon design, service
conditions, mechanical properties, and high-temperature
characteristics.
Chemical Composition (%)--MAX
| Grade | C | Mn | P | Su | Si | Cr | Mo |
| P9 | 0.15 | 0.3-0.6 | 0.025 | 0.025 | 0.25-1 | 8-10 | 0.9-1.1 |
Mechanical Properties
| Grade | Tensile Strength,min | Yield Strength (0.2%Offset,min) | Elongation-Longitudinal | Hardness max |
| P9 | MPa-585 | MPa-415 | 30% | 25HRC |
Inspections and Tests
| Inspections and Tests - Bare Tube |
| 1.Chemical Composition |
| 2.Mechanical Properties |
| 3.Flattening Test |
| 4.Ultrasonic Test |
| 5.Intergranular Corrosion Test |
| 6.Hardness Test |
| 7.Transverse Tensile Test (only for bimetallic tube),etc. |
Related Industries Involved
1.Petroleum Industry
2.Metallurgical industry
3.Power station boilers
4.Heat exchange systems
5.Pharmaceutical industry
6.Petrochemical industry
7.Waste heat recovery
