ASME Flanges for Pressure Vessel Connections

MTS Forge produces flanges in accordance with ASME standards applicable to pressure vessel and piping systems, supported by our comprehensive Quality Assurance Program covering Mil I 45208, NCA 3800, and Mil Q9858. We maintain full material and process traceability to meet the documentation requirements mandated by ASME code compliance in nuclear and power generation applications.

MTS Forge currently manufactures flanges up to 14 inches in size. Our production capabilities span a range of flange types and configurations to suit pressure vessel connection requirements across commercial nuclear, power generation, and chemical processing sectors. Contact our team to discuss specific dimensional requirements for your project.

We forge flanges in alloy steels, stainless steels including 316-L, and high-performance alloys such as Monel K-500 and Ferralium 255 duplex stainless steel. Our large tooling inventory and press flexibility allow us to work with nearly all material grades required by ASME pressure vessel and piping codes.

Yes. Traceability is a core requirement of our Quality Assurance Program. Every flange is produced with documented traceability from raw material receipt through final inspection, meeting the stringent procurement requirements of commercial nuclear, defense, and power generation customers who mandate complete chain-of-custody documentation for pressure-boundary components.

Our ASME flanges are predominantly produced for the commercial nuclear sector, where the highest quality and traceability standards apply. We also serve power generation, chemical processing, defense, and aerospace industries. Our customer base spans manufacturers and procurement teams primarily located in Pennsylvania, Iowa, Kentucky, and Texas.

Yes. We offer in-house normalizing heat treatment at our Coatesville, PA facility. Normalizing refines grain structure, relieves internal stresses introduced during forging, and produces consistent mechanical properties throughout the flange — improving tensile strength, toughness, and machinability for downstream processing or direct service in demanding pressure vessel environments.

Yes. Our in-house rough machining service removes forging flash and excess material to bring flanges to near-net shape immediately after forging. This eliminates the need for customers to source a separate machining vendor, reduces handling risk, and shortens overall lead times for pressure vessel component procurement.

MTS Forge was founded in 1986 by Stephen Carr and Edward Waddell — giving us nearly 40 years of forging industry experience. Since inception, we have continuously invested in technology and quality systems, making us a long-established and trusted manufacturer of forged flanges and pressure vessel components for critical industrial applications across the United States.