ASTM A182 SO Flange

QS Flange: Yancheng ASTM A182 SO Flange

Forged A182 F304 slip on flange, 2 inch 300LB raised face, fillet welded straight to valves or pipe for corrosion-resistant service.

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One-Minute Overview

Slip on flange forged from ASTM A182 F304 stainless steel.
2 inch, Class 300LB, raised face for a tight gasket seal.
Attaches to valve or pipe by fillet weld directly — no butt weld prep.
Corrosion resistant and low maintenance in industrial piping.

The ASTM A182 SO flange is a slip-on flange in forged A182 F304 stainless steel: it slides over a 2 inch pipe or valve neck and is fixed with a fillet weld directly, so fit-up is quick and the weld is easy to inspect. Rated Class 300LB with a raised face, it suits lines that need corrosion resistance without the cost and effort of a weld neck joint.

Name: ASTM A182 SO Flange
Size: 2"
Pressure: 300LB
Material: ASTM A182 F304
Flange Face: RF (Raised Face)
Type: SO (Slip-On)
Process: Forged

Slip-on flanges earn their place on lines where installation speed matters: the flange slides over the pipe, the fillet weld is laid down at the hub and the joint is done — no butt-weld alignment marathon. The A182 F304 body gives the corrosion resistance of 304 stainless in a forged pressure part, which keeps maintenance visits rare. Choose the 300LB raised face joint when Class 150 is not enough, and match studs and gasket to the class. Check the fillet weld and torque the studs in a cross pattern after the first heat cycle.

FAQ

Q1. Slip-on or weld neck — which one should win?

If installation speed and easy inspection top your list, the slip-on takes the crown: it slides over the pipe and stays with a fillet weld. If the joint sees heavy bending or fatigue, give the weld neck the job. For routine 2 inch 300LB lines, this slip-on does plenty.

Q2. What are the material and class ratings of this SO flange?

The flange is forged from ASTM A182 F304 stainless steel and rated Class 300LB with a raised face, in a 2 inch size. The forged body and F304 chemistry give corrosion resistance and durability in demanding industrial service, from valve connections to pipe runs.

Q3. Any install tips so this thing stays sealed?

Slide the flange over the pipe, set the gasket, and run the fillet weld at the hub — direct, just like the usage says. Then torque the studs in a cross pattern to the gasket guidance and re-check after the first heat cycle. That is the whole ritual.

Q4. How long does production usually 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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