A335 P11 HFW Serrated Finned Tube with GR.11 Fins - Boiler & HRSG Applications
Price:
Negotiable
MOQ:
10PCS
Delivery Time:
Depends on quantity
Brand:
YUHONG
Product Description
High-Frequency Welded Serrated Finned Tubes Base Tube: ASTM A335 P11 | Fins: Aluminum Alloy GR.11
1. Product Overview
High-frequency welded serrated finned tubes combine ASTM A335 P11 chromium-molybdenum alloy steel base tubes with aluminum alloy GR.11 fins via advanced HFW technology. Designed for extreme conditions (≤600°C), they deliver 30%+ higher thermal efficiency than smooth tubes.
2. Material Composition (ASTM-Compliant)
Table: Chemical Properties
| Component | Base Tube (A335 P11) | Fins (GR.11) |
|---|---|---|
| Carbon (C) | 0.05-0.15% | ≤0.15% |
| Silicon (Si) | 0.50-1.00% | 0.50-1.50% |
| Manganese (Mn) | 0.30-0.60% | ≤0.05% |
| Chromium (Cr) | 1.00-1.50% | - |
| Molybdenum (Mo) | 0.44-0.65% | - |
| Aluminum (Al) | - | ≥98.5% |
| Iron (Fe) | Balance | ≤0.7% |
Key Material Advantages:
- P11 Base Tube: High creep strength (60ksi yield) & oxidation resistance.
- GR.11 Fins: Anti-corrosion (salt spray >1,000hrs), thermal conductivity 200W/m·K.
3. Structure & Manufacturing Process
- Base Tube: Seamless, OD 15.88-50.8mm, Thickness 2.0-4.5mm
- Fins: Serrated edge (enhances turbulence), Height 12-20mm, Thickness 0.3-0.5mm
- Embedding Process:
HFW Technology: Fin-to-base bond strength >100MPa (per ASTM E8)
Helical Pitch: 3-10 fins/inch (customizable)
100% Weld Penetration: Ensures zero thermal contact resistance
4. Precision Tolerances
Table: Dimensional Standards (ASME B36.10)
| Parameter | Tolerance |
|---|---|
| Base Tube OD | ±0.10mm |
| Fin Height | ±0.15mm |
| Fin Pitch | ±0.2mm |
| Straightness | ≤1.5mm/m |
5. Performance Advantages
- Heat Transfer: 8-12x surface area expansion vs. bare tubes
- Fouling Resistance: Serrated fins disrupt boundary layers
- Pressure Integrity: P11 base tube rated for 15MPa @ 450°C
- Corrosion Protection: GR.11 forms Al₂O₃ protective layer
6. Application Industries
| Industry | Use Case Examples |
|---|---|
| Power Generation | HRSGs, Air Preheaters, Economizers |
| Petrochemical | Hydrocracker Feed Heaters, Reformers |
| Waste Heat Recovery | Flue Gas Condensers (acid dew point >140°C) |
| Marine | Exhaust Gas Boilers (saltwater corrosion resistance) |
7. Why Choose Our Finned Tubes?
- Certified Quality: EN 10204 3.1, ASME Section II, ISO 9001:2015
- Custom Engineering: Fin density/height tailored to fluid properties (gas/oil/steam)
- Proven Longevity: >60,000 service hours in refineries (API 530 compliant)
- Global Supply: 500+ tons/month capacity, lead time ≤30 days
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Yuhong Group Co.,Ltd
Location
20TH FLOOR,NO.1 NEW WORLD BUILDING ,NO.1018 MINAN ROAD,YINZHOU DISTRICT, NINGBO CITY, ZHEJIANG PROVINCE, CHINA
Contact Person
Jikin Cai