Low Price Ansi Slip Class 150 Rf Carbon Steel Raised Face Slip On Flanges

At Kriloha Gaskets & Hardware, we recognize that modern fluid processing networks require components that seamlessly balance robust mechanical security with standardized line flexibility. Our ANSI Class 150 Forged Carbon Steel ASTM A105 Slip-On Raised Face (SO-RF) Flanges represent our engineered answer for “High-Load-Joint-Security” and “Zero-Flexing-Integrity” across essential processing arrays. As a leading premier manufacturer and supplier of integrated flow control elements and pipeline hardware, Kriloha utilizes automated multi-axis production workflows to ensure that our forged slip-on configurations provide superior mechanical longevity compared to unpredictable cast alternatives.

The engineering of our Class 150 slip-on program is founded on Microstructural Uniformity and Deflection-Resistant Flatness. By forcing certified carbon steel stock through controlled hot-forging paths rather than relying on lower-cost casting alternatives, we eliminate internal gas pockets, voids, and structural micro-cracks. The refined metal grain structure smoothly traces the contour of the flange ring and low-profile hub, providing the high structural modulus required to withstand intense bolt-torque demands across the standardized bolt circle without warping or bowing over time. Finished with an anti-rust lacquer or heavy hot-dip galvanization, our carbon steel program handles heavy pipeline strains seamlessly. At Kriloha, we precision-machine the sealing surfaces on advanced CNC vertical turning lathes, adding controlled concentric phonographic micro-serrations ( finish) that firmly anchor your chosen gasket matrix to eliminate fluid bypass or blowout risks.

Manufacturing and provisioning these critical flow-control connection pieces involves strict Dimensional Tolerance Checks, Volumetric Material Inspections, and Face Roughness Calibration. We collaborate directly with your project engineering, procurement, and facility maintenance teams to supply precise internal bores tailored to standard pipe outer diameters and unique wall-thickness schedules (such as Schedule 40 or Schedule 80 matching). By choosing Kriloha Gaskets & Hardware, you are investing in a “Future-Proof” industrial partnership that prioritizes your system’s lifetime reliability through superior metallurgy and micro-tolerance engineering.

Primary Industrial Applications

Standard Plant Process Utilities: Ideal for primary factory utility lines distributing industrial water, cooling tower loops, factory compressed air networks, and inert gas loops operating under Class 150 parameters.
Midstream Hydrocarbon & Petroleum Lines: Heavy-duty, economical connection joints for non-corrosive crude oil transport, gathering manifolds, storage terminal trunk lines, and fuel oil distribution networks where fluid corrosion risks are minimal.
Steam & Condensate Networks: Reliable connection joints for secondary steam utility pipelines, boiler feed lines, and thermal fluid transport lines exposed to moderate thermal cycles.
Municipal Water & Sewage Infrastructure: High-volume provisioning for large-scale water treatment headers, municipal pump station manifolds, and wastewater filtration networks.
Modular Industrial Process Skids: Compact structural mounting flanges used to securely link prefabricated piping manifolds directly to valves, strainers, instrumentation blocks, and storage vessels.

Frequently Asked Questions (FAQs)

What is the structural difference between a Slip-On (SO) flange and a standard Flat Plate flange?

While both types slide over the pipe outer diameter and utilize double fillet welding, a standard plate flange is completely flat and collarless. A Slip-On flange features a low-profile raised hub or collar surrounding the center bore. This hub provides additional structural reinforcement at the weld zone, helping to distribute pipeline stresses and making it better suited for slightly higher mechanical loads or vibration profiles compared to a completely flat, hubless plate flange.

What is the operational purpose of the “Raised Face” (RF) on a slip-on flange?

The Raised Face (RF) serves to concentrate the massive clamping force generated when tightening the flange bolts into a smaller, centralized zone inside the bolt circle. By focusing this force onto an elevated step, the flange compresses the gasket far more intensely, resulting in a tighter, leak-resistant seal that can handle higher internal fluid pressures without blowing out.

What specific welding configuration is required to install an ASME Slip-On flange?

A slip-on flange requires a double fillet weld configuration for proper code-compliant installation:

One robust fillet weld around the exterior where the hub neck meets the outer diameter of the pipe wall.

A secondary fillet weld inside the bore, where the pipe end is slid back slightly (typically equal to the pipe wall thickness plus 3mm) from the flange face to prevent damaging the raised sealing face during field welding.

Can a carbon steel Raised Face (RF) flange be safely bolted to a Flat Face (FF) Cast Iron valve?

It is highly recommended not to mate a Raised Face steel flange directly to a Flat Face cast iron component. Because cast iron is brittle, the concentrated clamping force generated by the raised face inside the bolt circle creates a bending moment that can crack or fracture the expensive cast iron valve body when torque is applied. Like-to-like face configurations are best engineering practice.

Are Material Test Reports (MTRs) provided by Kriloha for these carbon steel flanges?

At Kriloha Ltd., quality assurance is completely non-negotiable. Every shipment from our facility can be accompanied by comprehensive Material Test Reports (MTRs) confirming exact chemical compositions (Carbon, Manganese, Silicon content), hardness values, yield/tensile strength data, and explicit compliance with international industrial standards to guarantee complete code traceability.