Visible/source-described
Horizontal shell image and stainless/copper corrugated-tube alternatives.
EQUIPMENT / EQUIPMENT FAMILY
Tegao corrugated-tube heat-exchanger constructions
One individually reviewed construction brief consolidates repeated source descriptions; tube material, selected duty and vessel arrangement still need an issued design.
From Beijing Tegao · Heating and hot-water equipment
Individual product research · HVACDeck Editorial · Sources checked 2026-10-11
Approve the tube bundle and duty before accepting a corrugated-tube claim
Tegao describes a shell-and-tube heat-exchanger construction using thin-wall stainless-steel or copper corrugated tubes in place of plain tubes. Its official page lists steam-to-water and water-to-water heat exchange for heating, air-conditioning and domestic-water duties, as well as industrial applications. The explanation attributes increased fluid disturbance, reduced scale adhesion and thermal-stress compensation to the shaped tubes. It supplies no measured heat-transfer coefficient, selected duty, wall thickness, material grade or pressure/temperature rating.
The standard exchanger and the storage/semi-storage product page repeat the same technical description. They are consolidated here as one construction assessment rather than treated as two independently specified products. The original standard-family photograph shows a horizontal cylindrical shell with end flanges, upper connections and feet. The internal tubes cannot be inspected from that image. Require the actual ordered tube bundle and storage arrangement before assuming an application, material or claimed stress-compensation benefit.
Published parameters and their scope
This is an equipment family; its range does not identify one orderable configuration.
- Family designation
- Corrugated-tube construction
Swipe the table, or focus it and use arrow keys, to read the conditions and sources.
| Parameter | Published value | Conditions and evidence |
|---|---|---|
| Heat-transfer construction | Shell and corrugated tubes | Supplier description; internal bundle not visible in reviewed photograph. Source |
| Tube-material alternatives | Thin-wall stainless steel / copper | Exact grade, thickness and compatibility not specified. Source |
| Published media | Steam-to-water / water-to-water | Requires a selected circuit and simultaneous rating conditions. Source |
| Consolidated source variants | Standard and storage/semi-storage titles | Technical body is repeated; no second independent rating schedule established. Source |
| Unverified performance claims | Enhanced transfer, reduced fouling and thermal-stress compensation | No numerical test or ordered-design substantiation reviewed. Source |
Selection and application review
Select the service and actual shell arrangement
State whether the equipment serves a heating loop, air-conditioning water or domestic hot water, and whether stored water is required. The source lists multiple uses without a selected design for any one of them. Ask for the issued shell/bundle layout, connection schedule and thermal selection for the actual service.
The storage/semi-storage page repeats the standard construction text. Its title alone does not prove usable storage, recovery performance or a different tube bundle. This catalogue therefore does not create a second search page from the same description. A quotation must explicitly define the additional storage arrangement if it is needed.
Choose material through the actual two-fluid conditions
Provide the fluid composition and water-quality information for both sides and ask for the exact proposed tube and shell materials. ‘Stainless steel or copper’ is a choice offered by the supplier, not a universal approval for a fluid, temperature or building-water application. Obtain the material grades, tube thickness and supporting compatibility statement for the selected order.
Clarify which material certificates and traceability records are delivered. The website’s phrase ‘thin wall’ supplies no numerical dimension, corrosion allowance or life prediction. Avoid comparing quotations with different materials or internal construction as if they were the same exchanger.
Ask for a rated thermal and hydraulic selection
Request heat duty and both fluids’ inlet/outlet temperatures and flows at one simultaneous operating point. Obtain pressure losses and the assumptions used in that selection. The described disturbance of fluid flow does not provide a quantified efficiency gain or prove that a smaller shell meets the building’s duty.
Ask for the operating envelope and available evidence for the actual design. No guaranteed output, approach temperature or percentage improvement can be extracted from the reviewed pages. The standard-family picture does not identify a model number or capacity.
Verify stress and cleaning provisions from the design
The supplier says corrugated-tube expansion/contraction compensates thermal stress and that an expansion joint is unnecessary. Require the responsible designer and manufacturer to substantiate the actual arrangement for the ordered temperatures, materials and cycling conditions. A general marketing sentence is not a design calculation or an exemption for any installation.
Similarly, reduced scale adhesion is not a cleaning exemption. Ask for the approved water-quality limits, inspection method, cleaning access and replacement-bundle arrangements. The shell photograph does not show how internal fouling would be inspected or how a bundle would be removed.
Freeze the purchase and inspection boundary
Obtain the vessel design limits, issued dimensions, support loads and nozzle schedule together with the thermal selection. Specify which valves, instruments and controls are included and which are external to the exchanger. Have the actual contracting/manufacturing party identify the required current pressure-equipment and inspection dossier.
Compare the selected construction, materials, duty and documented acceptance scope before price. The reviewed sources establish a product construction and its supplier-described alternatives, but not current stock, lead time or independently measured performance. This page is not a generic model-capacity list.
Engineering selection needed
Actual service, internals, materials, simultaneous thermal/hydraulic point and limits.
Evidence needed for claims
Ordered-design stress substantiation, maintenance instructions and agreed inspection records.
Sources and review scope
Compiled by HVACDeck Editorial. Source review identifies what the publication states; it is not an independent performance test or certification.
- Official corrugated-tube pageChecked 2026-10-11 · Complete text and original standard-family photograph reviewed; no quantified current rating.
- Official storage/semi-storage corrugated pageChecked 2026-10-11 · Full text reviewed and found to repeat the standard construction description; variants consolidated.
Editorial method and corrections · Report a detail with this page URL
Turn the evidence into an enquiry
Send the manufacturer your required duty, installation conditions and the unresolved items identified in this brief.
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