Ansi 125 Dn 200 Slip On Flat Face Flanges China Stainless Steel Flange

At Kriloha Gaskets & Hardware, we recognize that modern process networks require a careful balance of physical component compatibility with specialized material performance. Our ANSI Class 125 Forged Stainless Steel DN200 Slip-On Flat Face (FF) Flanges represent our engineered answer for “Stress-Free-Equipment-Interfacing” and “Deflection-Resistant-Flatness” across diverse process setups. Operating from our advanced automated fabrication facilities, Kriloha utilizes multi-axis CNC tooling to machine exact inner diameter tolerances, ensuring a seamless interface with your pipeline configurations.

The engineering of our flat face slip-on program is founded on Microstructural Uniformity and Strict Geometrical Precision. By forcing certified Grade 304L or 316L stainless steel stock through controlled forging paths rather than relying on lower-cost casting alternatives, we completely eliminate internal gas pockets, casting porosities, and structural micro-cracks. The refined metal grain structure smoothly traces the flat geometry of the ring, providing the high structural modulus required to withstand intense bolt-torque demands across the 8-bolt circle without warping or undergoing structural relaxation over time. To ensure a tight, leak-proof joint alongside your soft gaskets, our automated turning stations finish the specified mating surface with smooth, parallel concentric face lines ( finish) that maximize seal contact without tearing soft elastomer or full-face rubber matrices.

Manufacturing and provisioning these critical high-grade components involves strict Dimensional Tolerance Checks, Volumetric Material Inspections, and Surface 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 10S or Schedule 40S matching). By choosing Kriloha Gaskets & Hardware, you are investing in a “Future-Proof” industrial partnership that prioritizes your system’s lifetime reliability through superior stainless metallurgy and micro-tolerance engineering.

Primary Industrial Applications

Cast Iron Valve & Pump Interfacing: The industry-standard choice for connecting stainless steel pipelines directly to brittle Class 125 cast-iron or bronze valves, water pumps, strainers, and suction headers without the risk of fracturing the cast components.
Municipal Water & Wastewater Distribution: High-volume provisioning for large-scale filtration headers, municipal sewage pumping stations, water storage tanks, and environmental drainage manifolds.
Low-to-Medium Pressure Plant Utilities: Ideal for main factory utility lines distributing industrial water, low-pressure compressed air loop arrays, cooling tower circuits, and non-corrosive gas piping.
Hygienic Process Pipelines: Clean-utility networks in food processing, large-scale breweries, dairy plants, and pharmaceuticals where smooth, non-porous stainless steel prevents fluid contamination and survives clean-in-place (CIP) steam washdowns.
Modular Compact Process Skids: Low-profile connection interfaces preferred by prefabricated equipment manufacturers for routing fluid lines within compact, space-restricted structural frames.

Frequently Asked Questions (FAQs)

What is the fundamental purpose of choosing a Flat Face (FF) flange over a Raised Face (RF) flange?

A Flat Face (FF) flange features a completely flat surface across its entire face, from the inner bore to the outer edge. It is primarily specified when connecting steel or stainless steel pipelines directly to brittle materials like cast iron, bronze, or plastic components. Because the face is flat, the bolt torque forces are distributed evenly over the entire surface, preventing a bending moment that could crack or fracture the fragile mating flange.

Can a Flat Face (FF) stainless steel flange be safely bolted directly to a Raised Face (RF) flange?

It is highly recommended not to mate a Flat Face flange directly to a Raised Face flange. When bolted together, the raised face concentrates all the bolt-clamping force inside the bolt circle, creating an uneven bending stress on the flat face flange that can cause warping or joint leakage. Best engineering practice dictates matching face styles like-to-like (Flat Face to Flat Face).

What are the standard bolt hole configurations for an ANSI Class 125 8-inch flange?

According to the ANSI Class 125 / ASME B16.1 dimensional standard, an 8-inch (DN200) flange features an outer diameter of 13.5 inches (342.9 mm) and a bolt circle diameter of 11.75 inches (298.5 mm). It utilizes 8 bolt holes designed to accommodate 3/4-inch diameter bolts or stud bolts.

When should I select Grade 316L stainless steel over Grade 304L for this product?

Grade 304L is highly economical and excellent for freshwater processing, commercial HVAC loops, standard food-grade utilities, and clean factory environments. If your pipeline is handling aggressive chemical acids, highly concentrated salt brines, or is installed in an offshore marine environment exposed to heavy salt spray, upgrading to Grade 316L (which contains molybdenum) is mandatory to prevent localized pinhole pitting.

Are Material Test Reports (MTRs) provided with these forged flanges from Kriloha?

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 (including precise Carbon, Chromium, Nickel, and Molybdenum content), hardness values, yield/tensile strength data, and explicit compliance with international industrial standards to guarantee complete industrial traceability.