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Haihao Group has successfully completed the delivery of a new batch of A105N weld neck (WN) flanges, reinforcing our role as a trusted ASME B16.5 flange supplier in the global market. The shipment included WN flanges 16″-300 (RF/9.53) and WN flanges 3/4″-300 (RF/5.56), both manufactured to meet stringent international standards and engineered for reliable performance in demanding pipeline applications.
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Product Highlights
Standard: ASME B16.5
Material: ASTM A105N forged carbon steel
Types: Weld Neck RF flanges
Sizes Supplied: 16″-300 and 3/4″-300
Applications: Oil & gas, petrochemical, power generation, and high-pressure pipeline systems
Table 1 – Chemical Requirements (ASTM A105N)
Element | Requirement (%) |
Carbon (C) | ≤ 0.25 |
Silicon (Si) | 0.10 – 0.35 |
Manganese (Mn) | 0.60 – 1.05 |
Phosphorus (P) | ≤ 0.015 |
Sulfur (S) | ≤ 0.020 |
Nickel (Ni) | ≤ 0.40 |
Chromium (Cr) | ≤ 0.30 |
Molybdenum (Mo) | ≤ 0.12 |
Copper (Cu) | ≤ 0.40 |
Vanadium (V) | ≤ 0.08 |
Carbon Equivalent (CEV) | ≤ 0.36 |
Pcm | ≤ 0.19 |
Notes:
When C ≤ 0.12%, CE formula applies
Formula: Pcm = C + Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/10 + 5B
Cr + Mo shall not exceed 0.32%.
The combined total of Cu, Cr, Ni, Mo, and V shall not exceed 1.00%.
Table 2 – Tensile Properties at Room Temperature (ASTM A105N)
Property | Requirement |
Yield Strength (MPa) | ≥ 250 |
Tensile Strength (MPa) | 485 – 655 |
Elongation (%) | ≥ 22 |
Reduction of Area (%) | ≥ 30 |
Why Choose for A105N WN Flanges?
As a leading A105N weld neck flange manufacturer and exporter, Haihao Group combines advanced forging technology with strict quality control. Every flange is inspected to meet chemical composition and tensile property requirements outlined in ASTM A105N, ensuring our products deliver optimal performance in critical applications.
Whether for oil and gas pipelines, offshore installations, power plants, or chemical processing facilities, Haihao Group provides forged carbon steel flanges that meet international project requirements.
