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Brand Name : | DELLOK |
Model Number : | HFW |
Certification : | CE. ISO,EN10204. 3.1 Cert. |
Price : | N/A Contact us for details |
Payment Terms : | L/C, T/T Contact us for details |
Supply Ability : | 60000 meters month |
Delivery Time : | within 15days |
Welded Spiral Evaporator EN 10204 Carbon Steel Pipe Elbow
U Bent Welded Spiral Evaporator Tube , SA210 Gr. C SMLS Carbon Steel Tube
Detail:
High Frequency Resistance Welded Helical Steel Fin Tubes is widely used in the recovery of waste heat from boiler flue gas.
General HF welding production capacity | General specifications of HF welding fin tube |
Welding Facility: 4 finning machines; Daily production capacity up to 40 tons; HFW Fin type: solid plain and serrated. | Tube OD: 19mm min. Tube Length: 18 meters max. Fin Height: 32 mm max. Fin Thickness: 0.8mm min Fin Pitch: min. 4 mm for solid fins & 3.3mm for serrated fins. |
Manufacturing Process: The fin strip is welded continuously and
spirally wound onto a polished bare tube. And the tube and fins are
bonded together by using high frequency resistance welding
technique.
We produce both solid plain and serrated helical welded steel
finned tube. And also, all spiral welding tubes could be bent in
the middle or at the end of fin tubes, we call it Hairpin tubes.
Acceptance Criteria:
INTERNATIONAL STANDARD FOR DIMENSIONS, TOLERANCES, AND TESTS OF
HIGH FREQUENCY RESISTANCE WELDED FINS or the delivery conditions
(TDC) of clients.
Visual check:
Un-welded parts of fin, fin damage after fining, copper pollution,
tears, wrap etc…
Dimensional check:
Fin height, fin spacing, fin inclination, fin corrugation, length
of finned & un-finned portion etc…
Bending check:
Ovality, thickness and area reduction.
Surface Coating:
outside-Red oxide zinc phosphate primer and inside volatile
corrosion inhibitor (VCI) in water soluble tablet form.
Tube End Finish:
Bevel @ (30°~35°)
Bevel Root Size
0.5mm~1.5mm
Delivery condition
Tube ends are square cut, free burrs, internally dried and air
blown clean, externally coated with varnish at both ends of helical
welded tubes.
Documentation:
It shall include QAP, WPS, PQR& WPQ, raw materials mill
certificates, inspection and test samples results and warranty
certificate of manufacturer.
Applications:
The High Frequency Resistance Welded Helical Fin Tubes are widely
applied in fired heaters, heat exchanger, boilers, economizers,
pre-heaters, coolers, heat pipes, heaters etc….
Specifications:
A wide range of fin and tube materials could be combinations are
available.
Items | General Materials | Popular ASTM Materials |
Core Tube Material | Carbon Steel , Alloy Steel, Heat Resistant Steel, Stainless Steel etc. | 10#,20#,15CrMo,Cr5Mo,Cr9Mo,1Cr18Ni9Ti,0Cr18Ni9, 00Cr17Ni14Mo2,SA106B,SA106C, SA192, SA179, SA178,SA214, SA210-A1, SA210-C,TP304/304L/304H, TP409/410,TP316/316L,TP321/321L,TP347H,T11,T22,T91,etc. |
Fins Material | Carbon Steel , Alloy Steel, Heat Resistant Steel, Stainless Steel etc. | Q235-BF,08F,08AL, 1Cr18Ni9Ti, 0Cr13, 1Cr13, 0Cr18Ni9, 09CrCuSb, CS,A1008-B,SPHC, SPCC, TP304/304L,TP316/316L,TP321/321L,etc. |
Dimensions Data Sheet We Can Supply.
Solid Helical Steel Fin Tubes Fabrication Range | Solid fins(mm) | Serrated fins | ||
Min | Max | Min | Max | |
Tube OD(mm) | 19 | 219 | 19 | 219 |
Fin Height(mm) | 8 | 26 | 8 | 32 |
Fin Thickness(mm) | 0.8 | 2.8 | 1 | 1.6 |
Fins Density(mm) | 4(250FPM) | 20 | 3.3(303FPM) | 20 |
Tube Length(mm) | N/A | 18000 | N/A | 18000 |
Additional supply range : (1) Tube swaging process for joint of 2 tubes. (2) Spacer rings (material: steel) are available. (3) One side is solid plain fins and the other is serrated fins, 2 fin types on same tube. |
Competitive Advantage:
We have more than 10,000 square meters workshop, including 4 ERW high Frequency welding fining lines, daily production capacity around 40 Tons;
Our quality assurance plan for High Frequency Welding Spiral Steel Tubes. (2.1) Raw material control for both plain tubes and fins. (2.2) In process control with reports,as WPS, PQR&WPQ; weld deposition efficiency test before fabrication, Non-destructive test and tensile test etc. (2.3) Final inspection control with reports (Visual and dimensional check etc…).
The High Frequency Resistance Welded Fin Tube is integrally extended for the max surface area to achieve efficiency. The heat transfer ratio of high frequency welding fin tube is about 8~9 times higher than other plain tubes.
This Welded Helical Fin Tubes is a singular integral unit, eliminating heat contact resistance and losses. Generally tube side temperature up to 800 degree for stainess steel fins; Low carbon steels, withstanding up to 475 degree is the most common choice.
Our Service:
1. Inquiry-Professional quotation, or send inquiry item more
details, we start contact more details
2. Confirm the price, lead time, payment term etc
3. Our sales send the Proforma Invoice with our seal, or you order
online to us
4. Customer make the payment for deposit and send us Bank receipt
5. Initial Production Stage-Inform the clients that we have got the
payment, and will make the samples according to your request, send
you photos or samples to get your approval. After approval, we
inform that we will arrange the production & inform the estimated
time
6. Middle Production-send photos to show the production line which
you can see you products. Confirm the estimated delivery time
again.
7. End Production-Mass production products photos and samples will
send to you for approval. You can also arrange the third party
inspection
8. Clients make payment for balance and ship goods, inform the
tracking number and check the status for clients
9. Order can be say "finish" when you receive the goods and satisfy
with them
10. Feedback to our about Quality, Service, Market Feedback &
Suggestion. And we can do better
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