صندوق دعم أنبوب الزعانف,طوق دعم من الألومنيوم للأنابيب ذات الزعانف

About fin tube support box

A fin tube support box — also called a fin tube support collar — is an octagonal aluminum shell that fits over the finned section of a finned tube. Finned tubes are built by winding a thin aluminum strip tightly around a bare steel tube (commonly in L type or G type winding, depending on how the strip edge is mechanically locked onto the base tube) to increase surface area for heat transfer. That fin layer is only a fraction of a millimeter thick, so it deforms easily wherever the tube touches a support frame, a tube sheet, or another tube during stacking and transport. The support box wraps around the fin at those contact points, so the load lands on a rigid aluminum shell instead of directly on the fins. The octagonal profile also keeps stacked tubes from rolling or shifting against each other in transit.

Specifications at a Glance

شكل	Octagonal shell, split construction, folded/locked seam
مادة	الألومنيوم 1050
Matched fin tube base OD	Sized to the fin OD of the finned tube it protects — e.g. 25.4mm base tube / 57.2mm fin OD ranges
Fin winding type supported	L type and G type finned tubes
Typical wall thickness	Light-gauge aluminum shell
التعبئة	Bulk woodencase

Type I and Type II refer to different size grades matched to different finned tube dimensions and pitches — not two different products. Exact ID/OD and thickness are confirmed against the finned tube drawing for each order.

How It’s Used?

The support box is fitted over the fin at the points where the finned tube will bear load — at tube supports, header plates, or wherever tubes rest against each other in a bundle or in transit. It is not a permanent structural fitting; it is a wear-protection sleeve that transfers contact load away from the fins and onto its own rigid aluminum body. This matters most on air-cooled heat exchangers, where finned tube bundles are handled and stacked repeatedly between fin winding, transport, and final installation, and any dented or crushed fin section reduces heat-transfer performance and can fail incoming inspection.

Typical Applications

• Air-cooled heat exchangers (air coolers) using L type or G type finned tubes
• Protection of fin sections during finned tube manufacturing, packing, and export shipment
• Support and load protection at tube sheet / frame contact points during installation
• Refinery, البتروكيماويات, and power plant air-cooling systems where finned tube bundles are shipped long distances before install

مواد & المعايير

ج&N Hongcheng supplies fin tube support boxes in Aluminum 1050, sized to match the base tube OD and fin OD of the finned tube being protected — typically finned tubes manufactured to ASTM A179 base tube material with aluminum L type or G type fins. Support box dimensions are confirmed against the customer’s finned tube drawing or the mill data of the finned tube order (base tube OD, fin OD, fin pitch, and tube pitch) to guarantee a correct fit.

التكوين الكيميائي

سبيكة	و	Fe	النحاس	MN	Mg	كر	Zn	ل	آحرون:Each	آحرون:Total	آل: دقيقة.
1050	0.25	0.40	0.05	0.05	0.05	–	0.05	0.03	0.03	–	99.50
1060	0.25	0.35	0.05	0.03	0.03	–	0.05	0.03	0.03	–	99.60
1070	0.20	0.25	0.04	0.03	0.03	–	0.04	0.03	0.05	–	99.70
1100	0.95 Si Fee		0.05~0.20	0.05	–	–	0.1	–	0.05	0.15	99.0
2014	0.5~1.2	0.7	3.9~5.0	0.4~1.2	0.2~0.8	0.10	0.25	0.15	0.05	0.15	Margin
2017	0.2~0.8	0.7	3.5~4.5	0.4~1.0	0.4~0.8	0.10	0.25	0.15	0.05	0.15	91.5 – 95.5
2024	0.50	0.50	3.8~4.9	0.3~0.9	1.2~1.8	0.10	0.25	0.15	0.05	0.15	Margin
3003	0.60	0.70	0.05~0.20	1.0~1.5	–	–	0.10	–	0.05	0.15	Margin
3A21	0.60	0.70	0.20	1.0-1.6	0.05	–	0.15	0.1-0.2	–	–	Margin
3004	0.30	0.70	0.25	1.0~1.5	0.8~1.3	–	0.25	–	0.05	0.15	Margin
3005	0.60	0.70	0.30	1.0~1.5	0.2~0.6	0.10	0.25	0.10	0.05	0.15	Margin
3105	0.60	0.70	0.30	0.3~0.8	0.2~0.8	0.20	0.40	0.10	0.05	0.15	Margin
5005	0.30	0.70	0.20	0.20	0.5~1.1	0.1	0.25	–	0.05	0.15	Margin
5052	0.25	0.40	0.10	0.10	2.2~2.8	0.15~ 0.35	0.10	–	0.05	0.15	Margin
5754	0.40	0.40	0.10	0.50	2.6~3.6	0.30	0.20	0.15	0.05	0.15	Margin
5A05	0.50	0.50	0.10	0.3-0.6	4.8-5.5	–	0.20	–	0.05	0.05	Margin
5083	0.40	0.40	0.10	0.4~1.0	4.0~4.9	0.05~0.25	0.25	0.15	0.05	0.15	Margin
6061	0.40~0.8	0.70	0.15~0.4	0.15	0.8~1.2	0.04~ 0.35	0.25	0.15	0.05	0.15	Margin
6082	0.70~1.3	0.50	0.10	0.4~1.0	0.6~1.2	0.25	0.20	0.10	0.05	0.15	Margin
7075	0.40	0.50	1.2~2.0	0.30	2.1~2.9	0.18~0.28	5.1~6.1	0.20	0.05	0.15	Margin

Physical Performance

كثافة	Melting Point	Modulus of Elasticity	Thermal Conductivity	Thermal Expansion	Resistivity
2.71 Kg/m³	650درجة مئوية	71 GPA	222 W/m.K	24 × 10-6/K	0.282 × 10-6Ω.m

الخصائص الميكانيكية

قوة الشد(MPA)	Test Stress0.2% (MPA)	HardnessHB	Elongation Rate(%)
105-145	≥85	≥34	≥12

Why Source Fin Tube Support Boxes from C&ن هونغتشنغ

Support boxes are almost always ordered together with the finned tubes they protect, and getting the fit wrong means fins get crushed anyway. ج&ن هونغتشنغ sizes each support box against the actual finned tube specification of your order — base tube OD, fin OD, fin type — rather than offering a generic one-size product, and can supply matching quantities alongside your finned tube order for air-cooled heat exchanger projects in Saudi Arabia and the wider region.

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