Yuhong Group Co.,Ltd
| Payment Terms | L/C,T/T |
| Supply Ability | 1000 tons per month |
| Delivery Time | Depends on quantity |
| Packaging Details | IRON FRAME WOODEN CASE |
| Base Pipe Material Grade | ASTM A335 P22 |
| Stud Density Range 120 - 400 pins per square foot (customizable) | X120 - 400 pins per square foot (customizable) |
| Pressure Rating | ≥20 MPa (2900 psi) at 500°C |
| Key Applications | Power Boilers, Petrochemical Reactors, Waste-to-Energy Systems |
| Brand Name | YUHONG |
| Model Number | STUDDED TUBE |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C,T/T | Supply Ability | 1000 tons per month |
| Delivery Time | Depends on quantity | Packaging Details | IRON FRAME WOODEN CASE |
| Base Pipe Material Grade | ASTM A335 P22 | Stud Density Range 120 - 400 pins per square foot (customizable) | X120 - 400 pins per square foot (customizable) |
| Pressure Rating | ≥20 MPa (2900 psi) at 500°C | Key Applications | Power Boilers, Petrochemical Reactors, Waste-to-Energy Systems |
| Brand Name | YUHONG | Model Number | STUDDED TUBE |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | Place of Origin | CHINA |
| High Light | Studded Tubes ，ASTM A335 Studded Tubes ，High Temperature Resistant Studded Tubes | ||
Optimize Heat Transfer Efficiency with ASTM A335 P22 Chromium-Molybdenum Studded Tubes
ASTM A335 P22 Studded Tubes are engineered for extreme thermal applications. These tubes feature high-density studs (pins) welded onto A335 P9 base pipes, significantly expanding heat exchange surface area by 3-5x. Ideal for Waste Heat Boilers (WHB), HRSG, and catalytic reformers, they withstand temperatures up to 600°C (1112°F) and pressures exceeding 20 MPa.
| Process Stage | Key Details | Quality Assurance |
|---|---|---|
| Base Pipe Selection | ASTM A335 P9 seamless pipes, UT tested & certified to ASME Sec. II | MTC with traceability |
| Stud Welding | Automated GTAW process; Stud height: 6-25mm; Density: 120-400 pins/ft² | Shear strength ≥200 MPa |
| Heat Treatment | Normalizing at 950°C + Tempering at 730°C per ASTM A335 | Hardness: 190-220 HB |
| NDT | 100% Dye Penetrant Testing (PT) on welds + Hydrostatic test (1.5x design pressure) | ASME Sec. V compliant |
| Element | ASTM A335 P22 Requirement | Typical Manufacturer Control Range |
|---|---|---|
| Carbon (C) | 0.05 - 0.15 | 0.08 - 0.12 |
| Manganese (Mn) | 0.30 - 0.60 | 0.35 - 0.55 |
| Phosphorus (P) | ≤ 0.025 | ≤ 0.020 |
| Sulfur (S) | ≤ 0.025 | ≤ 0.015 |
| Silicon (Si) | 0.50 Max | 0.15 - 0.35 |
| Chromium (Cr) | 1.90 - 2.60 | 2.00 - 2.40 |
| Molybdenum (Mo) | 0.87 - 1.13 | 0.90 - 1.05 |
| Parameter | Tolerance Standard | Range (Typical) |
|---|---|---|
| Base Pipe OD | ASME B36.10M | ±0.75% (min ±0.10mm) |
| Wall Thickness | ASME B36.10M | +20% / -12.5% |
| Stud Height | EN 12451 | ±0.3mm |
| Stud Diameter | Custom | ±0.2mm |
| Straightness | ASTM E213 | ≤1.5mm/m length |
Material Expertise: 15+ years specializing in ASTM A335 P9/P11/P22 alloy tubes
Advanced Welding: Robotic GTAW ensures ≤0.1mm weld undercut (per AWS D10.12)
Global Compliance: Certified to ASME Sec. I, EN 10204 3.1, PED 2014/68/EU
Customization: Tailored stud patterns (staggered/in-line) & protective aluminizing coating
Proven Performance: 50,000+ tubes supplied to EU/US/MEA power projects since 2018
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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