ASME B16.5 SO Flange

QS Flange: Huaian ASME B16.5 SO Flange

Forged stainless steel slip on flange to ASME B16.5, 4 inch 150LB with raised face, attached by fillet weld for a tight, corrosion-resistant joint.

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One-Minute Overview

Slip on flange to ASME B16.5, 4 inch, 150LB with raised face.
Forged stainless steel body resists corrosion in harsh service environments.
Bolts to equipment or pipe and is fixed by a fillet weld directly.
Straightforward install for water, utility and process lines at Class 150.

The ASME B16.5 SO flange is a slip on flange dimensioned to the ASME B16.5 standard, rated 150LB in a 4 inch size with a raised face (RF). Forged from stainless steel, it delivers high corrosion resistance and an environmentally friendly, serviceable joint. The flange slides over the pipe or onto equipment and is secured with a fillet weld directly, so no butt weld preparation is needed at the joint.

Name: ASME B16.5 SO Flange
Size: 4"
Pressure: 150LB
Material: Stainless Steel
Flange Face: RF
Standard: ASME B16.5

Slip on flanges are chosen where installation speed matters: the flange is slipped over the pipe, aligned, and welded with a fillet weld inside the bore and around the hub. The raised face concentrates bolt load on the gasket and pairs with standard 150LB gasket styles. Stainless steel construction keeps the joint clean in water, utility and light process duty, and forged bodies give the stiffness a pressure joint needs. Match the bolt circle of the mating flange and tighten in a star pattern.

FAQ

Q1. Which standard governs this slip on flange?

Dimensions, drilling and the raised-face finish follow ASME B16.5 for the 4 inch 150LB size. The bolt circle and hole pattern match standard Class 150 flanges of the same size, so the flange mates with weld neck, blind and socket weld flanges without adapters or special gaskets.

Q2. How do I install it — anything tricky?

Nothing exotic. Slip the flange over the pipe or onto the equipment nozzle, square it up, and run a fillet weld inside the bore and around the hub. Fit the gasket specified for the service, tighten the bolting in a star pattern, and the joint is done.

Q3. Stainless steel, forged body, 150LB — is that overkill for my line?

Only if you enjoy rust. The forged stainless steel body shrugs off corrosion that would attack carbon steel, which matters on water and utility lines that run for years. The 150LB rating keeps the flange right-sized for low-to-medium pressure duty, so it is practical rather than excessive.

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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