Stainless Steel Reducer Manufacturer & ASTM A403 Eccentric/Concentric Reducers Manufacturer

Looking for a reliable stainless steel reducer manufacturer? Welcome to Wenzhou Zhiyuan Flange Pipe Fittings Co., Ltd. — visit our website www.buyflange.com — your trusted source for high-quality ASTM A403 eccentric/concentric reducersstainless steel concentric weld reducers, and concentric reducer Schedule 10 304/304L pipe fittings. With decades of manufacturing expertise, full material traceability, and strict quality control, we supply stainless steel butt weld pipe fittings to industrial buyers worldwide.


Why Choose Wenzhou Zhiyuan Flange Pipe Fitting Co., Ltd. as Your Stainless Steel Reducer Manufacturer

As a professional stainless steel reducer manufacturer, we understand that every piping project demands precision, durability, and full compliance. Our factory is equipped with advanced forming, machining, heat treatment, and testing equipment to deliver reducers that meet the most demanding specifications.

Our Core Advantages

  • Full ASTM A403 Compliance – Every reducer is manufactured and certified to ASTM A403 standards.

  • Complete Size Range – From 1/2″ to 64″ (DN15 to DN1600) to suit any project.

  • Multiple Material Grades – 304/304L, 316/316L, 321, 347, 310, 317L, Duplex & Super Duplex.

  • Fast Delivery – Large inventory and efficient production capacity ensure short lead times.

  • Competitive Factory-Direct Pricing – Quality products without the middleman markup.

  • Global Shipping – Export experience to over 50 countries worldwide.

Visit www.buyflange.com to browse our full product catalog.


ASTM A403 Eccentric/Concentric Reducers Manufacturer

We are a leading ASTM A403 eccentric/concentric reducers manufacturer, offering both types of reducers in seamless and welded construction.

Concentric Reducers

Our concentric reducers feature a symmetrical cone-shaped transition around the pipe centerline, ensuring smooth flow and consistent velocity. They are ideal for vertical pipelines, pump suction lines, and general flow applications.

Eccentric Reducers

Our eccentric reducers feature one flat side that maintains elevation along the bottom or top of the pipe. They are essential for horizontal lines where drainage or venting is required, such as steam lines, slurry systems, and gas pipelines.

Available Configurations:

  • Flat-Bottom (FOB) Eccentric Reducers

  • Flat-Top (FOT) Eccentric Reducers

  • Seamless & Welded Construction

  • Custom Sizes Available on Request


Stainless Steel Concentric Weld Reducers

Our stainless steel concentric weld reducers are designed for permanent, leak-proof butt weld connections. Manufactured to ASME B16.9 dimensional standards, these reducers offer:

  • Smooth interior surface for minimal turbulence

  • High structural integrity for critical applications

  • Excellent corrosion resistance

  • Extended service life with proper installation

Typical Applications:

  • Chemical processing plants

  • Food & beverage production lines

  • Pharmaceutical manufacturing

  • Water treatment systems

  • Petrochemical facilities

  • Power generation plants


Concentric Reducer Schedule 10 304/304L Pipe

We stock and manufacture concentric reducer Schedule 10 304/304L pipe fittings in a wide range of sizes. The 304/304L dual-certified stainless steel offers excellent corrosion resistance with improved weldability due to its low carbon content.

Schedule 10 Specifications

Parameter Specification
Standard ASME B16.9 / ASTM A403
Material 304/304L Dual Certified
Schedule Sch 10S
Size Range 1/2″ – 64″
Construction Seamless / Welded
End Type Beveled for Butt Welding

Example Dimensions: 20″ x 18″ Concentric Reducer

Parameter Large End Small End
Outside Diameter 508.0 mm 457.2 mm
Wall Thickness (Sch 10S) 4.78 mm 4.19 mm
Overall Length (H) 508.0 mm

Quality Assurance You Can Trust

Every ASTM A403 eccentric/concentric reducer we produce undergoes strict quality control:

  1. Raw Material Inspection – Chemical and mechanical property verification

  2. In-Process Control – Dimensional accuracy monitoring at every stage

  3. Final Inspection – ASME B16.9 dimensional verification

  4. Nondestructive Testing – Available upon request

  5. Material Certification – Mill test certificates provided with every order


Industries We Serve

Our stainless steel reducers are widely used in:

  • Oil & Gas

  • Chemical Processing

  • Food & Beverage

  • Pharmaceutical

  • Water Treatment

  • Power Generation

  • Shipbuilding

  • Desalination


Get a Quote Today

Are you looking for a reliable stainless steel reducer manufacturer? Whether you need ASTM A403 eccentric/concentric reducersstainless steel concentric weld reducers, or concentric reducer Schedule 10 304/304L pipe fittings, our team at Wenzhou Zhiyuan Flange Pipe Fittings Co., Ltd. is ready to help.

Contact us today with your specifications, and we will provide a competitive quotation within 24 hours.

📧 Email: [email protected]

WhatsApp/WeChat: +86 13838706559
🌐 Website: www.buyflange.com