Carbon Steel Insulation Flange Kits

A carbon steel flange is a disc-shaped forged or machined component used to connect pipes, valves, pumps, and other equipment in a piping system. Carbon steel grades such as ASTM A105 are widely specified for their high strength, pressure resistance, and cost-effectiveness in industrial, oil and gas, and power generation applications. They are available in various pressure classes and face types to suit specific system requirements.

A flange insulation kit electrically isolates two sections of a pipeline to prevent galvanic corrosion and support cathodic protection systems. The kit typically includes an insulating gasket, insulating sleeves, insulating washers, and steel backing washers. This isolation prevents stray electrical currents from accelerating metal degradation, extending the service life of pipelines in oil, gas, water, and chemical processing environments.

The flange components in the kit are produced from carbon steel—commonly ASTM A105 or similar grades—while the insulating elements (gaskets, sleeves, and washers) are made from materials such as G-10 fiberglass, phenolic, or PTFE. Hardware components like bolts and nuts are often provided in carbon steel or stainless steel depending on the service environment and cathodic protection design requirements.

Carbon steel insulation flange kits are used across oil and gas pipelines, power generation facilities, chemical processing plants, water treatment systems, and marine infrastructure. Defense and commercial nuclear facilities also specify them where cathodic protection and electrical isolation are mandatory. MTS Forge serves all these sectors with flanges produced under certified Quality Assurance Programs including Mil I 45208 and NCA 3800.

Carbon steel flanges are manufactured to ASME B16.5 and ASME B16.47 pressure class ratings, typically ranging from Class 150 through Class 2500. The appropriate pressure class depends on the operating pressure, temperature, and fluid handled in the system. MTS Forge produces flanges up to 14 inches in diameter with full traceability documentation to support specification and compliance requirements.

Yes. MTS Forge operates under certified Quality Assurance Programs including Mil I 45208, NCA 3800, and Mil Q9858, which mandate complete material traceability from raw billet to finished component. These programs are specifically required for military, nuclear, and aerospace procurement and ensure that every flange leaving our Coatesville, PA facility meets documented dimensional, mechanical, and chemical property requirements.

Yes. MTS Forge's custom forging capability allows us to produce carbon steel flanges to exact customer specifications, including non-standard bore sizes, face configurations, and thicknesses. Our large in-house tooling inventory and in-house tooling design capability allow us to accommodate unique requirements cost-effectively, without the lead time penalties typically associated with special tooling sourcing. Customers provide drawings or specifications and we develop a production plan to match.

Lead times vary based on flange size, quantity, material grade, and whether custom tooling is required. Because MTS Forge performs forging, heat treatment, and rough machining in-house at its Coatesville, PA facility, we eliminate inter-vendor delays that typically extend delivery timelines. For standard configurations with available tooling, we can provide estimated lead times upon receipt of your inquiry and drawing package.