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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

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 of MTS Forge

Stephen Carr

Co-Founder

Stephen Carr co-founded Manufacturing & Technical Services, Inc. (MTS Forge) in 1986 alongside Edward Waddell, driven by a shared vision to deliver high-quality forged solutions to America's most demanding industries. 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. Under his leadership, the company developed robust Quality Assurance Programs compliant with Mil I 45208 and NCA 3800, enabling MTS Forge to serve commercial nuclear, defense, aerospace, and power generation clients. His commitment to precision, traceability, and craftsmanship continues to define the standard for every carbon steel forged flange that leaves the Coatesville, PA facility.

Edward Waddell, Co-Founder of MTS Forge

Edward Waddell

Co-Founder

Edward Waddell co-founded MTS Forge in 1986, bringing a strong metallurgical background and a wealth of forging knowledge that has guided the company's growth over nearly four decades. Edward played a foundational role in establishing the principles of quality and service that remain central to MTS Forge's identity today. His technical expertise spans a wide range of forging processes and materials, enabling MTS Forge to serve industries from commercial nuclear and defense to power generation and chemical processing. Edward's vision helped build a facility in Coatesville, PA capable of delivering carbon steel forged flanges, special forgings, and custom components with the precision and traceability that critical industry sectors demand.

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.