DIN W.Nr.1.4301 WN Flange

QS Flange: Suzhou DIN W.Nr.1.4301 WN Flange

Forged DIN W.Nr.1.4301 weld neck flange, 2 inch 300LB RF in SS304, dimensioned to DIN for hot, high-pressure lines with strict sealing needs.

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One-Minute Overview

Weld neck flange in SS304 to DIN W.Nr.1.4301, 2 inch, 300LB class with an RF face.
Forged body gives strong stiffness and a clean, reliable sealing surface.
Dimensions follow DIN, so the flange interchanges with matching DIN-pattern parts.
Fits high-temperature, high-pressure piping where sealing requirements stay strict.

This DIN WN flange covers 2 inch lines in the 300LB class with a forged SS304 body. The material is the stainless grade registered as W.Nr.1.4301, and the flange is dimensioned to DIN so it mates with other DIN-pattern components. The raised face focuses bolt load on the gasket band while the tapered hub carries bending stress into the pipe.

Name: DIN W.Nr.1.4301 WN Flange
Size: 2"
Pressure: 300LB
Material: SS304 (W.Nr.1.4301)
Type: WN
Flange Face: RF
Process: Forged
Standard: DIN

A DIN-pattern weld neck is the answer when a 2 inch line runs hot, runs pressurized, and cannot afford a weeping joint. Select by size and class first, then pair the RF face with a gasket rated for the medium and temperature. The hub butt welds to a matching pipe end; keep the weld square and the root sound so the tapered transition does its stress-spreading job. Bolt tightening in a star pattern preserves even gasket compression. Forged SS304 resists the porosity of castings and keeps its stiffness through thermal cycling, which matters in plants where shutdowns are costly. Being dimensioned to DIN, the flange can replace other W.Nr.1.4301 weld necks without re-machining the line. Check the raised face for nicks before assembly and protect it during storage. Where the line sees steam or hot condensate, specify gaskets and bolting rated for the same temperature band as the flange itself.

FAQ

Q1. How does this WN flange differ from a slip-on flange on the same line?

A weld neck has a tapered hub that butt welds to the pipe and moves stress away from the joint, while a slip-on simply slides over the pipe. For hot, high-pressure service with strict sealing needs, the WN geometry is the stronger, tighter option.

Q2. What does W.Nr.1.4301 tell me about the steel?

W.Nr.1.4301 is the DIN Werkstoff number for the common austenitic stainless grade also known as SS304. Ordering by that number confirms the material identity, and the flange is dimensioned to DIN so it interchanges with matching DIN-pattern parts without rework on site.

Q3. Will a forged body really behave better than a cast one here?

Yes — forging refines the grain and removes the porosity and segregation that castings can hide. A pressure joint that cycles hot and cold needs that integrity, so forged SS304 keeps stiffness and sealing consistent over service life through years of cycling.

Q4. How long will production take?

Standard sizes are typically ready within 30 days, and in-stock items ship immediately. Larger or custom orders get a confirmed date per order, because the schedule depends on quantity, material, the bolt pattern you specify, and how busy production is at the moment you order.

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