ASME Certified Economizer Coil U-Bend Serpentine Tube for Boiler - 4t/h Steam Production, 35,000mm Length
High-efficiency economizer coil serpentine tube designed for boiler applications, manufactured with ASME certification for quality assurance.
| Parameter | Specification |
|---|---|
| Type | Natural Circulation, Fire Tube |
| Usage | Industrial |
| Pressure | High Pressure |
| Steam Production | Maximum 4t/h |
| Steam Temperature | 194°C (Customizable) |
| Material | Carbon Steel |
| Certification | SGS, ASME |
| Warranty | 1 Year |
Hua Dong Energy Technology has over 35 years of experience manufacturing austenitic stainless steel, nickel alloy steel, and specialized tubing. Annual production exceeds 50,000 tons, serving clients in over 45 countries worldwide.
ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004.
Widely used in heat exchanger systems for critical applications including boilers, heat exchangers, nuclear facilities, and petrochemical machinery. Since 1985, we have supplied over 300,000 tons of serpentine tubes to more than 30 countries.
- ASTM A688/ASME SA688
- ASTM A803/ASME SA803
- ASTM A556/ASME SA556
| Ferrite | Austenite | Duplex | Super Duplex | Ni-Alloys | Titanium |
|---|---|---|---|---|---|
| TP410, TP405, S44400, S44660, TP430 | TP304/304L, TP316/316L, TP316Ti, TP317/317L, TP321, TP347 | S31803, S32205, S32304 | S32750, S32760 | N06600, N08020, N00880, N08825, N08904 | Gr.2 |
Custom steel grades available upon agreement.
Manufactured to ASME SA 213, ASME SB 163, ASME A789, ASME SA268, ASME SA269 standards. Marking applied before bending with optional marking on straight parts after bending.
- TEMA RCB 2.31 Standard (9th Edition)
- ASTM A688/ASME SA688 for welded tubes
- ASTM B163/ASME SA163 for nickel alloy tubes
- Customer specifications accommodated
- Bending Radius: 1.5×OD to 1500mm
- Maximum Straight Tube Length: 35,000mm
- Leg Length: Minimum 1 meter, Maximum 16,500mm
- Heat Treatment: Stress relieved after U-bending
- Hydrostatic Test: Maximum 600 Bar pressure for 10 seconds
- Packaging: Transport-worthy wooden boxes with protective caps
| Test Type | Description |
|---|---|
| Chemical Analysis | Conducted per required quality standards |
| Mechanical Testing | Tensile, Hardness, Flattening, Flare, Flange |
| Reverse-bend & Re-flat Tests | Full compliance with ASTM A-450 and A-530 norms |
| Eddy Current Testing | Digital Flaw-mark Testing System for subsurface homogeneities |
| Hydrostatic Testing | 100% testing per ASTM-A 450 norms, maximum pressure 20Mpa/7s |
| Air Under Pressure Test | Air leakage detection |
| Visual Inspection | Thorough inspection by trained staff after passivation |
- Eddy Current Testing
- O.P Testing
- Radiography Testing
- Corrosion Testing
- Micro Testing
- Macro Testing
- IGC Testing
- Ultrasonic Testing
- Liquid Penetrate Testing
Engineers available for overseas machinery service and comprehensive technical support.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.