Google Icon

Backup Stainless Steel Pipe Flanges

MTS Forge manufactures precision backup stainless steel pipe flanges engineered for demanding industrial environments. From commercial nuclear to chemical processing, our flanges deliver unmatched corrosion resistance, dimensional accuracy, and full material traceability — built to exact specifications with decades of metallurgical expertise and American craftsmanship behind every component.

Backup stainless steel pipe flanges manufactured by MTS Forge

Our Backup Stainless Steel Pipe Flange Services

Comprehensive flange manufacturing and support services built for critical industrial applications requiring precision and full traceability.

Flange Manufacturing

Production of backup stainless steel pipe flanges up to 14 inches, manufactured under a stringent Quality Assurance Program with complete traceability for nuclear, chemical, and power generation sectors.

Special Forgings

Specialty stainless steel forgings including 316-L grade for Section III applications, conforming to Mil I 45208, NCA 3800, and Mil Q9858 quality standards for high-reliability environments.

Heat Treatment

In-house normalizing heat treatment for forged flange components, producing refined grain structures with consistent mechanical properties including improved tensile strength and enhanced machinability.

Rough Machining

Post-forging rough machining services that bring flange components to near-net shape, removing excess material and surface irregularities to reduce lead times and eliminate the need for a separate machining vendor.

Custom Forgings

Tailored backup flange solutions forged to exact customer specifications in stainless steel and high-performance alloys, combining advanced technology with time-honored American craftsmanship for superior durability.

Contour Forging

Contour forging of flanges and related components in materials including duplex stainless steels, enabling complex geometries with consistent mechanical performance across aerospace, nuclear, and industrial applications.

Full Traceability Guaranteed

Precision Stainless Steel Flanges Built for Critical Applications

MTS Forge's backup stainless steel pipe flanges are engineered to perform in the most demanding conditions — from commercial nuclear facilities to chemical processing plants and power generation systems. Manufactured at our Coatesville, PA facility, every flange is produced under a comprehensive Quality Assurance Program with complete material traceability. Our metallurgical expertise ensures dimensional precision, corrosion resistance, and compliance with the tightest industry standards, delivering components ready for immediate integration or downstream processing.

Stainless steel pipe flange manufactured to precise industrial specifications
Trusted By Industry Leaders

Success Stories

See how MTS Forge delivers precision backup stainless steel flanges that meet the most demanding specifications.

"MTS Forge's Flanges service delivered exactly what we needed for our nuclear power plant upgrade. Their Quality Assurance Program and complete traceability gave us total confidence in the components. Outstanding craftsmanship and reliability."

Robert Chen

"We needed backup stainless steel pipe flanges for our aerospace program on a tight timeline. MTS Forge delivered superior quality components with their proven metallurgical expertise. Their made-in-America commitment aligned perfectly with our requirements."

Jennifer Martinez

"The Closed Die Forgings process at MTS Forge significantly reduced our material waste and machining costs. Their expertise in handling Monel K-500 and other corrosion-resistant alloys made a real difference in our chemical processing operations."

David Kaufman

"MTS Forge's Heat Treatment service transformed our forged components. The normalizing process created uniform microstructure with improved tensile strength. Their in-house capability eliminated delays and ensured consistent mechanical properties throughout."

Michael Torres

"Searching for backup stainless steel pipe flanges, we found MTS Forge's competitive pricing and expert craftsmanship unbeatable. Their 40 years of experience and commitment to excellence provided exceptional value for our military defense projects."

Patricia Hoffman

"MTS Forge's Rough Machining service delivered near-net-shape forgings that eliminated secondary processing. Combined with their Heat Treatment, we received production-ready components. Their innovation and attention to detail are unmatched in the industry."

Steven Walsh

"Working with MTS Forge on Custom Forgings for our power generation equipment was transformative. Stephen Carr's metallurgical expertise and the team's commitment to excellence resulted in components exceeding our specifications and timelines."

Lisa Anderson

"As a major tier-one supplier, we depend on backup stainless steel pipe flanges meeting military standards. MTS Forge's Mil I 45208 and Mil Q9858 certifications, combined with their in-house tooling design capability, make them essential to our aerospace supply chain."

William Nakamura

"MTS Forge's Flanges service delivered exactly what we needed for our nuclear power plant upgrade. Their Quality Assurance Program and complete traceability gave us total confidence in the components. Outstanding craftsmanship and reliability."

Robert Chen

"We needed backup stainless steel pipe flanges for our aerospace program on a tight timeline. MTS Forge delivered superior quality components with their proven metallurgical expertise. Their made-in-America commitment aligned perfectly with our requirements."

Jennifer Martinez

"The Closed Die Forgings process at MTS Forge significantly reduced our material waste and machining costs. Their expertise in handling Monel K-500 and other corrosion-resistant alloys made a real difference in our chemical processing operations."

David Kaufman

"MTS Forge's Heat Treatment service transformed our forged components. The normalizing process created uniform microstructure with improved tensile strength. Their in-house capability eliminated delays and ensured consistent mechanical properties throughout."

Michael Torres

"Searching for backup stainless steel pipe flanges, we found MTS Forge's competitive pricing and expert craftsmanship unbeatable. Their 40 years of experience and commitment to excellence provided exceptional value for our military defense projects."

Patricia Hoffman

"MTS Forge's Rough Machining service delivered near-net-shape forgings that eliminated secondary processing. Combined with their Heat Treatment, we received production-ready components. Their innovation and attention to detail are unmatched in the industry."

Steven Walsh

"Working with MTS Forge on Custom Forgings for our power generation equipment was transformative. Stephen Carr's metallurgical expertise and the team's commitment to excellence resulted in components exceeding our specifications and timelines."

Lisa Anderson

"As a major tier-one supplier, we depend on backup stainless steel pipe flanges meeting military standards. MTS Forge's Mil I 45208 and Mil Q9858 certifications, combined with their in-house tooling design capability, make them essential to our aerospace supply chain."

William Nakamura

"MTS Forge's Flanges service delivered exactly what we needed for our nuclear power plant upgrade. Their Quality Assurance Program and complete traceability gave us total confidence in the components. Outstanding craftsmanship and reliability."

Robert Chen

"We needed backup stainless steel pipe flanges for our aerospace program on a tight timeline. MTS Forge delivered superior quality components with their proven metallurgical expertise. Their made-in-America commitment aligned perfectly with our requirements."

Jennifer Martinez

"The Closed Die Forgings process at MTS Forge significantly reduced our material waste and machining costs. Their expertise in handling Monel K-500 and other corrosion-resistant alloys made a real difference in our chemical processing operations."

David Kaufman

"MTS Forge's Heat Treatment service transformed our forged components. The normalizing process created uniform microstructure with improved tensile strength. Their in-house capability eliminated delays and ensured consistent mechanical properties throughout."

Michael Torres

"Searching for backup stainless steel pipe flanges, we found MTS Forge's competitive pricing and expert craftsmanship unbeatable. Their 40 years of experience and commitment to excellence provided exceptional value for our military defense projects."

Patricia Hoffman

"MTS Forge's Rough Machining service delivered near-net-shape forgings that eliminated secondary processing. Combined with their Heat Treatment, we received production-ready components. Their innovation and attention to detail are unmatched in the industry."

Steven Walsh

"Working with MTS Forge on Custom Forgings for our power generation equipment was transformative. Stephen Carr's metallurgical expertise and the team's commitment to excellence resulted in components exceeding our specifications and timelines."

Lisa Anderson

"As a major tier-one supplier, we depend on backup stainless steel pipe flanges meeting military standards. MTS Forge's Mil I 45208 and Mil Q9858 certifications, combined with their in-house tooling design capability, make them essential to our aerospace supply chain."

William Nakamura
The MTS Forge Difference

Why Choose MTS Forge?

Four decades of metallurgical expertise and American manufacturing excellence set us apart.

Metallurgical Expertise

Founded by metallurgists, our team applies deep materials science knowledge to every stainless steel flange we produce.

Rigorous Quality Assurance

Our QA program meets Mil I 45208, NCA 3800, and Mil Q9858 standards, ensuring complete traceability for nuclear and defense clients.

In-House Capabilities

From forging and heat treatment to rough machining and tooling design, we handle every production step at our Coatesville, PA facility.

Made in America

Every backup stainless steel flange we produce is manufactured domestically, supporting critical supply chains across Pennsylvania and beyond.

Meet the MTS Forge Team

Experienced metallurgists and forging specialists dedicated to precision and quality.

Stephen Carr

Co-Founder

Stephen Carr co-founded MTS Forge in 1986 alongside Edward Waddell, building the company on a foundation of quality and service excellence. With a deep metallurgical background and extensive knowledge of forging practices, Stephen has been instrumental in shaping MTS Forge into a recognized leader in the domestic forging industry. His technical expertise spans a wide range of materials and forging methodologies, with particular focus on stainless steel components for demanding applications including commercial nuclear, aerospace, and defense. Under his leadership, MTS Forge has developed an in-house capability for tooling design, heat treatment, and rough machining — enabling full production control and superior component traceability. Stephen's commitment to American manufacturing and precision craftsmanship continues to drive the company's growth and reputation.

Edward Waddell

Co-Founder

Edward Waddell co-founded Manufacturing & Technical Services, Inc. in 1986, partnering with Stephen Carr to establish what would become MTS Forge — a nationally respected forging manufacturer based in Coatesville, PA. Edward brings a strong metallurgical background and comprehensive knowledge of forging practices across a broad spectrum of materials, including alloy steels, stainless steels, and high-performance alloys. His technical leadership has guided the company's expansion into critical sectors such as commercial nuclear power, aerospace, defense, and chemical processing. Edward has championed MTS Forge's investment in state-of-the-art forging technology and its rigorous Quality Assurance Program, ensuring every component — including backup stainless steel pipe flanges — meets the highest standards of dimensional accuracy, mechanical integrity, and regulatory compliance.

Frequently Asked Questions

What is a backup flange?

A backup flange (also called a backing flange) is a flat ring used in conjunction with a stub end or lap joint flange. It slides over the pipe and sits behind the stub end, providing the bolting surface to connect two pipe sections. This design allows the flange to rotate freely, making bolt-hole alignment easier during installation without requiring the costly flange material to contact the process fluid.

What are stainless steel flanges used for?

What sizes of stainless steel pipe flanges does MTS Forge manufacture?

What stainless steel grades are available for backup flanges?

What quality standards do your stainless steel flanges meet?

Does MTS Forge offer heat treatment for forged flanges?

Can MTS Forge produce custom backup flanges to specific drawings or specifications?

Which industries does MTS Forge serve with its stainless steel flange products?

Have More Questions About Our Flanges?

Speak directly with our metallurgical experts for technical guidance or a custom quote.

Certified & Compliant

Awards and Recognition

Mil I 45208 certification badge

Mil I 45208

Military inspection system standard for quality assurance.

NCA 3800 nuclear quality assurance certification badge

NCA 3800

Nuclear quality assurance program certification.

Mil Q9858 quality program certification badge

Mil Q9858

Military quality management system program standard.

Get a Quote on Backup Stainless Steel Pipe Flanges

Fill out the form below with your flange specifications, material requirements, and quantity. Our metallurgical team will review your inquiry and respond with technical guidance and pricing.

Contact Us Today

For immediate assistance, feel free to give us a direct call at (610) 857-3500. You can also send us a quick email at Fmicale@mtsforgepa.com