Carbon Steel Weld Neck Flange
Carbon steel weld-neck flanges for butt-welded, high-stress flange connections on process and steam lines. The tapered hub improves fatigue performance versus plate flanges. Quoted and sold per piece.
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Available Sizes & Finishes
19 sizes available
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Applications & Selection Guide
Carbon steel weld-neck flanges to EN 1092-1 (Type 11) with a tapered hub butt-welded to the pipe. The gradual hub transition transfers bending and pressure stresses smoothly into the pipe wall, giving the highest joint integrity of any flange type.
Weld-necks are specified on process lines, steam systems, cyclic and vibrating service, and wherever radiographic weld inspection is required. The bore is matched to the pipe ID for uninterrupted flow — important on erosive or high-velocity lines. Choose PN class and DN from the table above; the pipe schedule should be stated at order so the hub bore matches.
Quoted and sold per piece. Send PN, DN, pipe wall/schedule, quantity, and destination in a quote request for exact pricing and lead time.
Technical guides
Pipe schedule chart: Sch 40 and Sch 80 sizes, wall thickness and weight (NPS ½" to 24")
Steel pipe schedule chart for NPS ½" to 24": outside diameter, Schedule 40 and Schedule 80 wall thickness and weight per metre to ASME B36.10M, what NPS, DN and schedule mean, and metric EN equivalents.
Read the guide →Flange dimensions: EN 1092-1 PN6 to PN40 and ASME B16.5 Class 150 and 300
Flange dimension tables for EN 1092-1 PN6, PN10, PN16, PN25 and PN40 and ASME B16.5 Class 150 and 300: outside diameter, bolt circle, number and size of bolts, and why PN and Class flanges do not mate.
Read the guide →Product Information
Material Grade
Carbon steel
Manufacturing Standard
EN 1092-1
Material Type
Steel
Category
Weld Neck Flange
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