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DELLOK Seamless Superheater TP321 Stainless Steel U Bend Tube

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DELLOK Seamless Superheater TP321 Stainless Steel U Bend Tube
Features Gallery Product Description Request A Quote
Straight Tubes Maximum Length:: 35000 Mm.
Type: Fin Tube
Company Type: Manufacturer, Importer & Exporter
Leg Length: Min 1 Meter, Max. 16500 Mm
Heat Treatment: Stress Relieved After U-Bending
Fin Tube Type: U Tube Bundles
High Light:

TP321 Stainless Steel U Shaped Tube


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Superheater U Shaped Tube

Basic Infomation
Place of Origin: China
Brand Name: DELLOK
Certification: CE. ISO,EN10204. 3.1 Cert.
Model Number: U Tube
Payment & Shipping Terms
Packaging Details: Solid fumigated wooden box with tube location racks inside.
Delivery Time: Ex-work within 1 month on receipt of order.
Payment Terms: L/C, T/T Contact us for details
Supply Ability: 60000 meters month
Product Description

Seamless Superheater TP321 Stainless Steel U Shaped Tube


ASTM A213 TP321 / 321H , Seamless Stainless Steel U Bend Superheater Tube

ASTM A213/A213M : Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes


U-Bend Tubes are accordance with the Following Standards:

1. ASTM A688/ASME SA688

2. ASTM A803/ASME SA803

3. ASTM A556/ASME SA556


Steel Grade:




Super Duplex


























Straight Tubes Maximum Length:

(Before Bending): 35000 mm.


Unit Leg Length

Min 1 Meter, Max. 16500 mm (For Max R=1500mm)


Heat Treatment

Stress Relieved After U-Bending (Bending Area Plus 300MM For Each Leg).


Hydrostatic Test After U Bending

Maximum Test Pressure 600 Bar, Holding time: 10 Sec.

Medium: Dematerialized Water.

Compressed Air Cleaning After Hydro-Test.



In Strong Transport-Worthy Pre-fumigated wooden boxes of corresponding dimensions for

each tube Length, Radius, Diameter, According To PO requirements as well as wrapped In polyethylene

films With soft plastic caps on both end of Tube.


General Quality Tests

Corrosion Test

Conducted only when specially requested by the client

Chemical Analysis

Test done as per required quality standards

Destructive / Mechanical Testing

Tensile | Hardness | Flattening | Flare | Flange

Reverse-bend and Re. flat tests

Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end

Eddy Current Testing

Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System

Hydrostatic Testing

100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s .

Air Under Pressure Test

To check any evidence of air leakage

Visual Inspection

After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections

Supplementary Testing : Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing. The tests conducted under this include:

  • Eddy Current Testing

  • O.P Testing

  • Radiography Testing

  • Corrosion Testing

  • Micro Testing

  • Macro Testing

  • IGC Testing

  • Ultrasonic testing

  • Liquid Penetrate testing


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

DELLOK Seamless Superheater TP321 Stainless Steel U Bend Tube 0DELLOK Seamless Superheater TP321 Stainless Steel U Bend Tube 1DELLOK Seamless Superheater TP321 Stainless Steel U Bend Tube 2


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Get in touch with us
Contact Person : Pax Yang
Tel : +862569521609
Fax : 86-25-6952-5709
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