• Low-to-Medium Pressure Plant Utilities: Ideal for primary factory utility lines distributing ambient-temperature industrial water, cooling tower loops, low-pressure factory compressed air networks, and inert gas loops.
• Municipal Water & Irrigation Pipelines: Standard space-saving connection joints for large-scale water treatment headers, municipal sewage drainage networks, and open-flow irrigation pumping manifolds.
• Commercial HVAC & Building Utilities: Highly budget-efficient connections for routing thin-wall chilled water lines, commercial building condenser loops, and low-pressure utility risers in restricted service shafts.
• Storage Tank & Vessel Accessory Connections: Flat mounting rings used to join auxiliary process lines, manway monitoring lines, and drainage loops directly to low-pressure storage vessels or atmospheric tanks.
• Modular Compact Process Skids: Low-profile connection interfaces preferred by prefabricated equipment manufacturers for routing fluid lines within compact, space-restricted structural frames.

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

A standard Slip-On flange features a low-profile raised hub or collar surrounding the center bore to provide extra reinforcement at the weld zone. A Plain Plate flange is entirely flat, hubless, and collarless. It offers a much more compact, lightweight, and cost-effective profile, making it highly preferred for space-restricted, lower-pressure utility installations.

What specific welding configuration is required to install a Plain Plate Slip-On flange?

A plain plate slip-on flange requires a standard double fillet weld setup for a code-compliant installation:

One robust fillet weld around the exterior rear side where the flange face 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 sealing surface during field welding.

Can a carbon steel Raised Face (RF) plate 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.

How does Kriloha protect carbon steel plate flanges against environmental rust during transit and storage?

Because carbon steel is vulnerable to atmospheric oxidation, our factory provides multiple protective surface treatment options depending on your long-term storage and field installation environment. Our standard finishes include a light yellow or black anti-rust lacquer, a rust-preventative oil finish, or heavy-duty hot-dip galvanization for outdoor, high-humidity, or municipal water utility installations.

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

At Kriloha Ltd., quality assurance is completely non-negotiable. Every shipment dispatched 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 (such as ASME B16.5, DIN, or EN 1092-1 dimensional layouts) to guarantee complete code traceability.