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Carbon Steel Pipe Flanges — ANSI/ASME B16.5 Compliant

MTS Forge manufactures carbon steel pipe flanges to full ANSI/ASME B16.5 compliance, backed by nearly 40 years of metallurgical expertise and in-house forging capability. Serving power generation, commercial nuclear, chemical processing, and industrial manufacturing sectors from our Coatesville, PA facility — we deliver dimensionally precise, fully traceable flanges engineered to perform in the most demanding pressure and temperature environments.

Carbon steel pipe flanges manufactured to ANSI/ASME B16.5 standard at MTS Forge facility

Our Carbon Steel Flange Services

From forging and heat treatment to rough machining and full traceability, we deliver complete flange solutions under one roof.

Flange Manufacturing

We produce a comprehensive range of carbon steel pipe flanges up to 14 inches, manufactured to ANSI/ASME B16.5 standards with a rigorous Quality Assurance Program ensuring complete dimensional and material traceability.

Heat Treatment

In-house normalizing heat treatment refines the grain structure of forged flange components, delivering improved tensile strength, toughness, and uniform mechanical properties required for high-pressure piping applications.

Rough Machining

Post-forging rough machining brings flanges to near-net shape, removing flash and surface irregularities to reduce downstream processing costs and lead times without requiring a separate machining vendor.

Custom Forgings

Beyond standard flange profiles, MTS Forge produces custom-forged carbon steel components tailored to exact engineering specifications, supporting special bore sizes, pressure classes, and non-standard geometries for critical applications.

Special Forging

Special forgings crafted to stringent industry standards including Mil I 45208, NCA 3800, and Mil Q9858, supporting nuclear, defense, and high-integrity piping systems requiring full QA program compliance.

Contour Forging

Contour forging capability supports complex flange profiles and transition geometries across a wide material range, enabling cost-efficient shape production versus machining from solid bar stock.

Forging process for carbon steel pipe flanges inside a manufacturing facility

Our 5-Step Flange Manufacturing Process

Material Selection & Procurement Review

We begin by verifying raw material certifications and chemical composition for carbon steel stock, ensuring full compliance with ANSI/ASME B16.5 material requirements before any forging operation commences. Traceability is established at this stage.

Closed Die or Upset Forging

Normalizing Heat Treatment

Rough Machining & Dimensional Inspection

Quality Assurance & Traceability Documentation

Trusted By Industry Leaders

Success Stories

See how MTS Forge delivers compliant, precision flanges for power generation, nuclear, and defense applications.

"MTS Forge delivered our carbon steel flanges on schedule with exceptional quality. Their closed die forgings process saved us 30% on material costs compared to machining from bar stock. Highly reliable partner."

James Mitchell

"We needed ANSI B16.5 compliant flanges for our nuclear reactor project. MTS Forge's Quality Assurance Program with complete traceability gave us confidence. Their expertise in metallurgy really shows in the finished product."

Dr. Sarah Chen

"As a carbon steel flanges manufacturers comparison shopper, MTS Forge stood out for their in-house tooling capability and competitive pricing. Their 40-year track record in forging gave me peace of mind on quality."

Robert Kowalski

"Tight deadline on our aerospace project required rapid turnaround. MTS Forge's rough machining service delivered near-net-shape flanges in half the time we anticipated. Exceptional responsiveness and craftsmanship."

Michael Torres

"Their heat treatment normalizing process refined the grain structure of our forgings perfectly. The improved tensile strength and toughness reduced our downstream processing costs significantly. Outstanding technical execution."

David Patterson

"We've partnered with MTS Forge for over eight years now. Their commitment to innovation and customer satisfaction is unwavering. They've grown with our business and consistently deliver excellence."

Patricia Goldstein

"MTS Forge's ability to handle upset forgings up to 1500 pounds and their expertise with Monel K-500 materials impressed our design team. Their closed die forging process delivers precision and consistency we demand."

Kevin Wu

"When evaluating carbon steel flanges manufacturers for our power plant upgrades, MTS Forge's certifications in Mil I 45208 and Mil Q9858 combined with their made-in-America positioning made them the clear choice."

Linda Vasquez

"MTS Forge delivered our carbon steel flanges on schedule with exceptional quality. Their closed die forgings process saved us 30% on material costs compared to machining from bar stock. Highly reliable partner."

James Mitchell

"We needed ANSI B16.5 compliant flanges for our nuclear reactor project. MTS Forge's Quality Assurance Program with complete traceability gave us confidence. Their expertise in metallurgy really shows in the finished product."

Dr. Sarah Chen

"As a carbon steel flanges manufacturers comparison shopper, MTS Forge stood out for their in-house tooling capability and competitive pricing. Their 40-year track record in forging gave me peace of mind on quality."

Robert Kowalski

"Tight deadline on our aerospace project required rapid turnaround. MTS Forge's rough machining service delivered near-net-shape flanges in half the time we anticipated. Exceptional responsiveness and craftsmanship."

Michael Torres

"Their heat treatment normalizing process refined the grain structure of our forgings perfectly. The improved tensile strength and toughness reduced our downstream processing costs significantly. Outstanding technical execution."

David Patterson

"We've partnered with MTS Forge for over eight years now. Their commitment to innovation and customer satisfaction is unwavering. They've grown with our business and consistently deliver excellence."

Patricia Goldstein

"MTS Forge's ability to handle upset forgings up to 1500 pounds and their expertise with Monel K-500 materials impressed our design team. Their closed die forging process delivers precision and consistency we demand."

Kevin Wu

"When evaluating carbon steel flanges manufacturers for our power plant upgrades, MTS Forge's certifications in Mil I 45208 and Mil Q9858 combined with their made-in-America positioning made them the clear choice."

Linda Vasquez

"MTS Forge delivered our carbon steel flanges on schedule with exceptional quality. Their closed die forgings process saved us 30% on material costs compared to machining from bar stock. Highly reliable partner."

James Mitchell

"We needed ANSI B16.5 compliant flanges for our nuclear reactor project. MTS Forge's Quality Assurance Program with complete traceability gave us confidence. Their expertise in metallurgy really shows in the finished product."

Dr. Sarah Chen

"As a carbon steel flanges manufacturers comparison shopper, MTS Forge stood out for their in-house tooling capability and competitive pricing. Their 40-year track record in forging gave me peace of mind on quality."

Robert Kowalski

"Tight deadline on our aerospace project required rapid turnaround. MTS Forge's rough machining service delivered near-net-shape flanges in half the time we anticipated. Exceptional responsiveness and craftsmanship."

Michael Torres

"Their heat treatment normalizing process refined the grain structure of our forgings perfectly. The improved tensile strength and toughness reduced our downstream processing costs significantly. Outstanding technical execution."

David Patterson

"We've partnered with MTS Forge for over eight years now. Their commitment to innovation and customer satisfaction is unwavering. They've grown with our business and consistently deliver excellence."

Patricia Goldstein

"MTS Forge's ability to handle upset forgings up to 1500 pounds and their expertise with Monel K-500 materials impressed our design team. Their closed die forging process delivers precision and consistency we demand."

Kevin Wu

"When evaluating carbon steel flanges manufacturers for our power plant upgrades, MTS Forge's certifications in Mil I 45208 and Mil Q9858 combined with their made-in-America positioning made them the clear choice."

Linda Vasquez
The MTS Forge Difference

Why Choose MTS Forge for ANSI/ASME B16.5 Flanges?

Nearly four decades of metallurgical expertise and purpose-built forging capability make MTS Forge the reliable source for compliant carbon steel pipe flanges.

Metallurgical Expertise

Founded by degreed metallurgists, our team brings deep materials science knowledge to every carbon steel flange produced, ensuring correct grain structure and mechanical properties for pressure service.

Full In-House Control

From forging and heat treatment to rough machining and QA documentation, every step is performed at our Coatesville, PA facility — eliminating vendor handoffs and reducing lead times for procurement teams.

Rigorous Traceability

Our Quality Assurance Program — certified to Mil I 45208, NCA 3800, and Mil Q9858 — provides complete material and process traceability, meeting the stringent documentation requirements of nuclear and defense customers.

Made in America

All flanges are forged and finished domestically at our Pennsylvania facility, supporting Buy American requirements and providing supply chain reliability for defense, power generation, and industrial manufacturers across the U.S.

Meet the MTS Forge Founders

Decades of metallurgical mastery behind every forged flange we produce.

Stephen Carr

Co-Founder

Stephen Carr co-founded Manufacturing & Technical Services, Inc. (MTS Forge) in 1986 alongside Edward Waddell, building the company on an unwavering commitment to quality and customer service. With a strong metallurgical background and extensive hands-on knowledge of forging practices, Stephen has guided MTS Forge's technical direction for nearly four decades. His deep understanding of carbon and alloy steel behavior under forging conditions has been instrumental in developing the company's expertise in ANSI/ASME B16.5-compliant flanges and nuclear-grade forgings. Under his leadership, MTS Forge has grown into a recognized leader in the domestic forging industry, serving aerospace, defense, commercial nuclear, and power generation customers from the company's Coatesville, PA facility.

Edward Waddell

Co-Founder

Edward Waddell co-founded MTS Forge in 1986, partnering with Stephen Carr to establish a forging company rooted in technical excellence and long-term customer relationships. Edward brings a metallurgical background and comprehensive knowledge of forging practices that spans nearly 40 years of active industry experience. His expertise spans carbon steel, stainless steel, and high-performance alloy forgings, with particular focus on components destined for high-integrity applications in power generation, commercial nuclear, and defense. Edward's commitment to precision and compliance has been a driving force behind MTS Forge's Quality Assurance Programs, certified to Mil I 45208, NCA 3800, and Mil Q9858, which underpin the company's reputation for fully traceable, specification-conforming flange products.

Frequently Asked Questions

What does ANSI/ASME B16.5 compliance mean for carbon steel pipe flanges?

ANSI/ASME B16.5 is the governing standard that specifies dimensions, pressure-temperature ratings, materials, tolerances, marking, and testing requirements for pipe flanges from NPS 1/2 through NPS 24. A compliant flange is manufactured, documented, and dimensionally verified to meet these requirements, ensuring safe and interchangeable assembly in pressurized piping systems across industrial and commercial applications.

What pressure classes of carbon steel flanges does MTS Forge produce?

What flange types can MTS Forge manufacture in carbon steel?

What carbon steel grades are available for B16.5 flanges?

Is heat treatment included with forged carbon steel flanges?

What quality documentation and certifications come with MTS Forge flanges?

Does MTS Forge offer rough machining on flanges prior to shipment?

What industries does MTS Forge supply carbon steel flanges to?

Still Have Questions About Our Flanges?

Speak with our metallurgical team for specification guidance or to request a quote.

Where We Serve

MTS Forge manufactures and ships ANSI/ASME B16.5 carbon steel flanges to customers across the United States from our Coatesville, PA facility.

Coatesville, PA

Headquarters

PA, IA, KY, TX

Primary Markets

Since 1986

In Business

Do We Supply Your Region?

Contact us to confirm availability and lead times for your location and application.

Certified & Compliant

Awards and Recognition

Mil I 45208 military quality assurance certification badge

Mil I 45208

Military inspection system standard for quality assurance

NCA 3800 nuclear quality assurance certification badge

NCA 3800

Nuclear quality assurance requirements for forged components

Mil Q9858 military quality program certification badge

Mil Q9858

Military quality program standard ensuring manufacturing reliability

Get a Quote for ANSI/ASME B16.5 Carbon Steel Flanges

Submit your specifications, required pressure class, flange type, and quantity below. Our team will respond promptly with pricing and lead time 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