ASME B16.5 Weld Neck Flange – 20" – Class 1500 – High-Pressure Rated

Available for sale is a 20-inch Class 1500 flange, built in full compliance with ASME B16.5 standards for high-pressure piping systems. This flange is engineered for critical service applications including refining, oil & gas, petrochemical, and high-temperature industrial systems.

Available in types such as Weld Neck (WN), Blind (BL), or Slip-On (SO) (based on specification), this flange is manufactured from carbon steel, stainless steel, alloy steel, or high-strength low-alloy materials. Featuring a raised face (RF) or ring-type joint (RTJ), the flange includes precise bolt hole patterns and is machined to handle pressures up to Class 1500 service conditions.

Coating options such as anti-rust oil, galvanization, or epoxy are applied as required for corrosion protection. Designed for extreme operating conditions, this flange delivers robust performance and long-term reliability.

Specifications:

– Flange Type: Weld Neck (WN) / Blind (BL) / Slip-On (SO) (Specify exact type)
– Nominal Size: 20 inches (NPS 20)
– Pressure Rating: Class 1500
– Standard Compliance: ASME B16.5
– Material Options:
 • ASTM A105 / A350 LF2 (Carbon Steel, Low Temp)
 • ASTM A182 F304 / F316 / F321 (Stainless Steel)
 • ASTM A182 F11 / F22 / F91 (Alloy Steel)
 • ASTM A707 (High-Strength Low-Alloy Steel)
– Facing Type: Raised Face (RF) / Ring-Type Joint (RTJ) (Specify if known)
– Coating: Anti-Rust Oil / Epoxy / Galvanized (as applicable)
– Outer Diameter (OD): ~965 mm
– Bolt Circle Diameter (BCD): ~914 mm
– Bolt Hole Count: 20
– Bolt Hole Size: 1-3/4 inches
– Flange Thickness: ~127 mm (may vary)

Mechanical & Performance Properties:
– Yield Strength: ≥ 250 – 485 MPa (depending on material)
– Tensile Strength: ≥ 485 – 760 MPa
– Operating Temperature Range: –50°C to 600°C
– Corrosion Resistance: Available with NACE MR0175 compliance (if required)

For further specifications or to inquire about this equipment and ReflowX's logistics services, please contact ReflowX at info@reflowx.com