F316 SO Flange

QS Flange: Jiaxing F316 SO Flange

Forged ASTM A182 F316 slip on flange, 2 inch 150LB RF per ANSI B16.5, fillet welded to equipment or pipe in corrosive process lines.

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One-Minute Overview

Forged ASTM A182 F316 slip on flange for a 2 inch Class 150 joint.
RF face and ANSI B16.5 dimensions for easy alignment to equipment or pipe.
SS316 resists corrosive media better than 304 in process and power service.
Slip on style is fitted and fillet welded directly — quick to install and inspect.

The F316 SO flange is a 2 inch Class 150 slip on flange forged from SS316 stainless steel. It slides over the pipe or equipment nozzle and is fixed with a fillet weld, which makes fit-up quick and keeps the joint easy to inspect. The raised face follows ANSI B16.5 dimensions, so it lines up with standard 2 inch 150LB flanges, valves and vessel nozzles.

Name: F316 SO Flange
Size: 2"
Pressure: 150LB
Material: SS316
Flange Face: RF
Process: Forged
Standard: ANSI B16.5
Type: SO

Choose the F316 grade where the line carries corrosive fluids or where the outside of the pipe sees washdown or coastal air — the molybdenum in 316 handles chlorides better than 304. Slip on flanges are forgiving during fit-up: the welder can tack, align and then complete the fillet weld on both sides. Keep the gasket matched to the RF face and the bolt torque even. Typical users include oil and gas skids, chemical process lines and power plant utility piping.

FAQ

Q1. What does the SO designation mean on this flange?

SO stands for slip on. The flange slides over the pipe or equipment nozzle and is secured by a fillet weld rather than a butt weld as on a weld neck flange. Dimensions follow ANSI B16.5 for 2 inch Class 150, so it mates with standard valves, nozzles and companion flanges.

Q2. Why pick F316 over plain 304 here?

Because 316 adds molybdenum, which stands up to chlorides and many chemicals far better than 304. If your line sees salt water, cleaning agents or corrosive process media, F316 buys you a longer service life; for dry, mild service a 304 flange is usually enough.

Q3. Is a slip on flange just the lazy option?

Lazy? No — pragmatic. A slip on is easy to fit and simple to inspect, and for many low-pressure lines that is exactly what you want. Just remember it is fillet welded, so check the weld and gasket torque schedule like you would for any pressure-boundary joint.

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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