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Custom Stainless Steel Pipe Flanges — Manufacturer

MTS Forge has manufactured precision stainless steel pipe flanges since 1986, serving the commercial nuclear, power generation, and defense industries from our Coatesville, PA facility. With complete traceability, in-house heat treatment, and rough machining under one roof, we deliver flanges up to 14 inches built to your exact specifications and the most demanding quality standards.

Custom stainless steel pipe flanges manufactured at MTS Forge facility in Coatesville, PA

Our Custom Stainless Steel Pipe Flange Services

From nuclear-grade flanges to custom contour forgings, we manufacture stainless steel components built to your tightest specifications.

Flange Manufacturing

Manufacturing of stainless steel flanges up to 14 inches with full Quality Assurance Program and complete traceability, primarily serving commercial nuclear, power generation, and defense sectors requiring stringent standards.

Custom Forgings

Custom-forged stainless steel products tailored to exact specifications, combining cutting-edge technology and time-honored craftsmanship to deliver components meeting the highest standards of durability and performance.

Special Forgings

Special forgings in 316-L Stainless Steel for Section III applications, manufactured under a comprehensive Quality Assurance Program encompassing Mil I 45208, NCA 3800, and Mil Q9858 for precision-critical environments.

Heat Treatment

In-house normalizing heat treatment for forged flange components, producing refined uniform microstructure with improved tensile strength, enhanced toughness, and consistent mechanical properties throughout each part.

Rough Machining

In-house rough machining applied directly after forging to bring flanges close to near-net shape, reducing lead times, eliminating separate vendor handling, and ensuring tight dimensional control from early in production.

Contour Forging

Contour forging services in a diverse range of materials including duplex stainless steels such as Ferralium 255, demonstrating MTS Forge's capability to supply complex flange geometries beyond standard offerings.

Complete In-House Control

Precision Stainless Flanges Built to Your Exact Requirements

At MTS Forge's Coatesville, PA facility, every stainless steel pipe flange is produced under a rigorous Quality Assurance Program with full material traceability — a requirement we've met for commercial nuclear customers for decades. Our in-house forging, heat treatment, and rough machining capabilities eliminate the hand-offs that introduce risk and delay. Whether your application demands 316-L for Section III compliance or a duplex grade for corrosive service, we have the metallurgical expertise and tooling inventory to deliver flanges up to 14 inches that perform reliably in the most demanding environments.

MTS Forge stainless steel flange manufacturing with quality inspection at Coatesville PA facility
Trusted By Industry Leaders

Success Stories

See how MTS Forge delivers precision stainless flanges that meet the strictest quality and traceability requirements.

"MTS Forge's flange manufacturing is exceptional. Their custom stainless steel pipe flanges arrive perfectly machined, meeting our nuclear specs every time. Forty years of expertise shows in the quality."

Jennifer Martinez

"We needed closed die forgings in tight tolerances. MTS solved our lead time problem with their in-house rough machining capability. Parts arrived nearly net-shape, saving us weeks of downstream processing."

Robert Chen

"As a custom stainless steel pipe flanges manufacturer, MTS Forge delivers consistently superior products. Their attention to traceability and QA aligns perfectly with our aerospace requirements and budget constraints."

David Kowalski

"Emergency order for upset forgings needed in seventy-two hours. MTS responded immediately with heat treatment and rough machining completed in-house. Their speed and problem-solving are unmatched in the industry."

Patricia Gonzalez

"MTS Forge's competitive tooling costs and closed die forging processes dramatically reduced our unit costs. Their made-in-America quality allowed us to eliminate expensive imports without sacrificing performance."

Michael Torres

"We've partnered with MTS Forge for twelve years. Their heat treatment normalizing process delivers consistent microstructure across all our special forging orders. Reliability and excellence define our relationship."

Susan Aldridge

"Their electric eye contour burning and custom forging capabilities for eight-inch materials impressed our engineering team. Precision, craftsmanship, and state-of-the-art facilities combined perfectly for our project."

James Rutherford

"MTS Forge is the leading custom stainless steel pipe flanges manufacturer in our supply chain. Their Mil I 45208 and NCA 3800 certifications, combined with made-in-America commitment, position them as essential partners."

Catherine Wilson

"MTS Forge's flange manufacturing is exceptional. Their custom stainless steel pipe flanges arrive perfectly machined, meeting our nuclear specs every time. Forty years of expertise shows in the quality."

Jennifer Martinez

"We needed closed die forgings in tight tolerances. MTS solved our lead time problem with their in-house rough machining capability. Parts arrived nearly net-shape, saving us weeks of downstream processing."

Robert Chen

"As a custom stainless steel pipe flanges manufacturer, MTS Forge delivers consistently superior products. Their attention to traceability and QA aligns perfectly with our aerospace requirements and budget constraints."

David Kowalski

"Emergency order for upset forgings needed in seventy-two hours. MTS responded immediately with heat treatment and rough machining completed in-house. Their speed and problem-solving are unmatched in the industry."

Patricia Gonzalez

"MTS Forge's competitive tooling costs and closed die forging processes dramatically reduced our unit costs. Their made-in-America quality allowed us to eliminate expensive imports without sacrificing performance."

Michael Torres

"We've partnered with MTS Forge for twelve years. Their heat treatment normalizing process delivers consistent microstructure across all our special forging orders. Reliability and excellence define our relationship."

Susan Aldridge

"Their electric eye contour burning and custom forging capabilities for eight-inch materials impressed our engineering team. Precision, craftsmanship, and state-of-the-art facilities combined perfectly for our project."

James Rutherford

"MTS Forge is the leading custom stainless steel pipe flanges manufacturer in our supply chain. Their Mil I 45208 and NCA 3800 certifications, combined with made-in-America commitment, position them as essential partners."

Catherine Wilson

"MTS Forge's flange manufacturing is exceptional. Their custom stainless steel pipe flanges arrive perfectly machined, meeting our nuclear specs every time. Forty years of expertise shows in the quality."

Jennifer Martinez

"We needed closed die forgings in tight tolerances. MTS solved our lead time problem with their in-house rough machining capability. Parts arrived nearly net-shape, saving us weeks of downstream processing."

Robert Chen

"As a custom stainless steel pipe flanges manufacturer, MTS Forge delivers consistently superior products. Their attention to traceability and QA aligns perfectly with our aerospace requirements and budget constraints."

David Kowalski

"Emergency order for upset forgings needed in seventy-two hours. MTS responded immediately with heat treatment and rough machining completed in-house. Their speed and problem-solving are unmatched in the industry."

Patricia Gonzalez

"MTS Forge's competitive tooling costs and closed die forging processes dramatically reduced our unit costs. Their made-in-America quality allowed us to eliminate expensive imports without sacrificing performance."

Michael Torres

"We've partnered with MTS Forge for twelve years. Their heat treatment normalizing process delivers consistent microstructure across all our special forging orders. Reliability and excellence define our relationship."

Susan Aldridge

"Their electric eye contour burning and custom forging capabilities for eight-inch materials impressed our engineering team. Precision, craftsmanship, and state-of-the-art facilities combined perfectly for our project."

James Rutherford

"MTS Forge is the leading custom stainless steel pipe flanges manufacturer in our supply chain. Their Mil I 45208 and NCA 3800 certifications, combined with made-in-America commitment, position them as essential partners."

Catherine Wilson
The MTS Forge Difference

Why Choose MTS Forge?

Four decades of metallurgical expertise and in-house capability make MTS Forge the trusted source for critical stainless steel pipe flanges.

Metallurgical Expertise

Founded by metallurgists, our team brings deep material science knowledge to every stainless flange we forge.

Full Traceability

Our Quality Assurance Program provides complete traceability, meeting the rigorous demands of nuclear and defense procurement teams.

In-House Capability

Forging, heat treatment, and rough machining under one Pennsylvania roof reduces lead times and lowers your total procurement cost.

Made in America

Every flange is manufactured at our Coatesville, PA facility, supporting domestic supply chains for aerospace, defense, and power generation.

Meet the MTS Forge Founders

Four decades of leadership driven by metallurgy, precision, and unwavering commitment to quality.

Stephen Carr

Co-Founder

Stephen Carr co-founded Manufacturing & Technical Services, Inc. — MTS Forge — in 1986 alongside Edward Waddell, building the company from the ground up on the principles of quality and customer service. With a strong metallurgical background and extensive hands-on knowledge of forging practices, Stephen has been instrumental in shaping MTS Forge's technical capabilities and quality culture. His expertise spans a wide range of forging methods and alloy systems, directly informing the company's ability to manufacture precision stainless steel pipe flanges and special forgings to the strictest industry standards, including nuclear and defense applications. Under his co-leadership, MTS Forge has grown into a recognized leader in the American forging industry, serving critical sectors from its Coatesville, PA facility for nearly four decades.

Edward Waddell

Co-Founder

Edward Waddell co-founded MTS Forge in 1986 with a vision of delivering high-quality forging solutions to America's most demanding industries. Bringing a deep metallurgical background and comprehensive knowledge of forging practices, Edward has helped guide the company's investment in cutting-edge technology and in-house capabilities — including heat treatment, rough machining, and tooling design — that set MTS Forge apart from standard forging suppliers. His commitment to precision, traceability, and continuous improvement has been central to MTS Forge's reputation for reliability in commercial nuclear, aerospace, and power generation applications. Edward's leadership has ensured that every stainless steel flange and forged component leaving the Coatesville, PA facility reflects the craftsmanship and technical rigor the company was founded upon.

Frequently Asked Questions

Which ASTM standard covers forged or rolled stainless steel flanges?

ASTM A182 is the primary standard governing forged or rolled alloy and stainless steel pipe flanges, fittings, and valves for high-temperature service. It specifies chemical composition, mechanical properties, heat treatment requirements, and testing procedures for grades including F304, F316, F316L, and duplex grades. MTS Forge produces flanges to meet ASTM A182 and related nuclear and defense specifications.

What flange sizes does MTS Forge manufacture?

What stainless steel grades are available for flanges?

Do MTS Forge flanges come with full material traceability?

What quality certifications does MTS Forge hold for flange manufacturing?

Does MTS Forge perform heat treatment on stainless steel flanges?

Can MTS Forge provide rough-machined flanges ready for downstream processing?

Which industries does MTS Forge serve with stainless steel flanges?

Have More Questions About Our Flange Capabilities?

Speak directly with our metallurgical and forging experts for a tailored consultation.

Certified & Compliant

Awards and Recognition

Mil I 45208 certification badge for MTS Forge

Mil I 45208

Military inspection system standard for precision manufacturing quality.

NCA 3800 nuclear quality assurance certification for MTS Forge

NCA 3800

Nuclear quality assurance requirement for commercial nuclear component suppliers.

Mil Q9858 military quality program certification for MTS Forge

Mil Q9858

Military quality program standard ensuring product reliability and process control.

Get a Quote for Custom Stainless Steel Pipe Flanges

Share your flange specifications, material requirements, and quantity. Our team in Coatesville, PA will review your requirements and respond with lead time and pricing information.

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