Carbon Steel Flanges for Pipeline Systems are forged components that facilitate secure, leak-proof connections in industrial piping networks. Made from ASTM A105 carbon steel (with tensile strength 485-655 MPa), they are available in pressure ratings from Class 150 to Class 2500 and feature raised face (RF) or ring-type joint (RTJ) designs.
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Product Description
Compliance with ASME B16.5 ensures dimensional uniformity, making them compatible with pipes, valves, and pumps in oil, gas, and chemical industries.
Product Name | Steel Flange |
Types | Plate, Welding Neck, Slip on, Blind, Lap joint, Threaded Flange |
Material | Carbon steel/Stainless steel |
NPS | 1/8”-48” |
Outer Diameter | 10.2mm-1219mm |
Thickness | 5mm-120mm |
Connection method | Butt Welded/Flat welding |
Pressure Handling: Class 150 flanges (PN10/16) suit low-pressure systems (≤285 psi), while Class 2500 (PN420) handles high-pressure applications up to 2,500 psi in oil well pipelines.
Corrosion Mitigation: Surface treatments include zinc plating (5-15μm) for indoor use and epoxy coating (100-200μm) for soil burial or mild chemical exposure.
Welding Compatibility: Weld Neck flanges feature a tapered hub that reduces stress concentration by 40% compared to Slip-On designs, ideal for cyclic pressure systems.
Inspection Standards: Each flange undergoes ultrasonic testing to detect internal defects, with 100% visual inspection of sealing surfaces.
Midstream Oil & Gas: Connects gathering lines, storage tank outlets, and pumping stations, handling crude oil and natural gas mixtures.
Chemical Processing: Used in reagent transfer lines, reactor outlets, and distillation column connections (for non-highly corrosive media).
Municipal Engineering: Applied in water distribution mains, sewage force mains, and HVAC chiller loops in commercial buildings.
Q: What is the minimum flange thickness for buried applications?
A: For Class 300 (PN50) and soil burial, a minimum thickness of 12mm is recommended to resist external pressure.
Q: Can they be used with Victaulic couplings?
A: Yes, when paired with compatible adapter flanges, but ensure alignment tolerance is within ±1.5mm to prevent leakage.
Q: How often should flange connections be inspected?
A: For critical systems, quarterly visual inspections; for general service, annual checks for bolt tightness and gasket condition.
