RF F316 Flange

QS Flange: Jiangsu RF F316 Flange

Forged ASTM A182 F316 SO flange with raised face, 4 inch 150LB per ANSI B16.5, for corrosive chemical, refinery and marine piping.

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One-Minute Overview

Forged ASTM A182 F316 slip on flange with raised face for 4 inch 150LB joints.
ANSI B16.5 dimensions keep it interchangeable with standard valves and companion flanges.
F316 handles corrosive chemicals, refinery streams and marine exposure.
Fillet welded to equipment or pipe directly — fast fit-up, straightforward inspection.

The RF F316 flange is a 4 inch Class 150 slip on flange forged from ASTM A182 F316 stainless steel. It attaches to equipment nozzles or pipe ends with a fillet weld, which shortens fit-up and leaves the weld visible for inspection. The raised face seals against standard gaskets, and ANSI B16.5 dimensions mean it drops into existing 150LB lines without adapters.

Name: RF F316 Flange
Type: SO
Size: 4"
Pressure: 150LB
Material: ASTM A182 F316
Flange Face: RF
Process: Forged
Standard: ANSI B16.5

In chemical plants, refineries and marine installations, the joint is often the first place corrosion shows up. The F316 body — with its molybdenum addition — resists pitting from chlorides and many process chemicals far better than standard 304. Choose this flange for washdown areas, coastal exposure and lines carrying mildly aggressive media. Match the gasket to the raised face, use the class 150 bolt pattern and torque evenly in a star sequence. For equipment nozzles, confirm the nozzle rating before bolting up.

FAQ

Q1. How is this flange connected to the equipment or pipe?

It is a slip on design: the flange slides over the pipe or equipment nozzle and is fixed with a fillet weld on both sides. This avoids the fit-up of a butt-weld neck, keeps the weld easy to inspect, and the RF face then seals against the gasket when the joint is bolted.

Q2. Why F316 instead of 304 for this one?

Molybdenum. F316 resists chlorides and many chemicals much better than 304, which matters in refineries, chemical plants and anywhere the joint sees salt air or washdown. Pay a little more for the grade and you usually pay less in replacements.

Q3. Will it survive being bolted to a pump that shakes all day?

Forged F316 is a tough customer, and a properly torqued class 150 joint handles vibration well. Keep the bolt torque even, re-check after the first heat-up cycle, and the flange will outlast the arguments about whose job the re-torque is.

Q4. How long does 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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