A182 F304 WN Flange

QS Flange: Jiangsu A182 F304 WN Flange

Forged A182 F304 weld neck flange, 1 inch 300LB RF in W.Nr.1.4301, for pipelines that run hot, run under pressure and must not leak.

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One-Minute Overview

Weld neck flange in A182 F304 stainless, 1 inch size, 300LB class with an RF face.
Hot forged to EN10222-5, giving strong stiffness and good sealing at the joint.
Tapered hub spreads stress away from the weld under pressure and thermal cycling.
Specified where lines run hot and high-pressure and sealing is the top priority.

The A182 F304 weld neck flange brings a forged stainless joint to 1 inch lines in the 300LB class. The body is produced from W.Nr.1.4301 by hot forging to EN10222-5, which yields a fine, uniform grain and the strong stiffness a pressure joint needs. The raised face concentrates bolt load onto the gasket, and the tapered hub eases stress transition from flange to pipe.

Name: A182 F304 WN Flange
Size: 1"
Pressure: 300LB
Material: W.Nr.1.4301 (A182 F304)
Type: WN
Flange Face: RF
Process: Forged
Standard: EN10222-5

Weld neck flanges earn their place where sealing matters more than install speed: high-temperature and high-pressure lines, and joints that see repeated thermal cycling. Choose the flange first by size and pressure class, then match the raised face gasket to the medium and temperature. The tapered hub should butt weld to a matching pipe end; keep the weld root sound and avoid pulling the flange out of square while welding. Bolt up in a star pattern to the gasket guidance so the RF contact stays even. Because the hub moves stress into the pipe gradually, the joint tolerates pressure swings better than a flat weld-on plate. The forged structure also resists the porosity and segregation found in cast alternatives, which is why forging to EN10222-5 is specified for this class of service. Since the hub weld is a full-penetration butt joint, radiographic or ultrasonic inspection can verify it in critical service.

FAQ

Q1. What does the weld neck design actually do for the joint?

The tapered hub carries stress smoothly from the flange into the pipe wall, so load does not pile up at the weld. That keeps the joint tight under pressure and thermal cycling, which is why weld necks are specified for high-temperature, high-pressure and high-sealing service.

Q2. Why forge this flange from W.Nr.1.4301 instead of casting it?

Hot forging to EN10222-5 produces a fine, uniform grain with strong stiffness and good sealing behavior. Castings can hide porosity and segregation, and a pressure-boundary part cannot afford those defects, so forged material is the reliable choice for high-temperature service in particular.

Q3. Is a raised face really worth the extra care during installation?

Yes — the raised face concentrates bolt load onto a narrow gasket band, which produces better sealing with less bolt force. Keep the face clean, torque in a star pattern, and the RF geometry does the rest of the work at the flange joint itself.

Q4. What is the smallest order I can place?

Standard flange insulation gasket kits start at one set, and standard gaskets, studs, washers and sleeves start at one piece. Parts made to your drawing or to a non-standard bolt pattern are quoted one by one, because the minimum really depends on the material and the tooling involved.

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