Concentric & Eccentric Reducers – Stainless Steel, Carbon Steel, Alloy Steel, High Nickel Alloys – ASME B16.9
Prime Steel Corporation is one of the most trusted names in the manufacturing and export of Buttweld Pipe Reducers, supplying high-quality Concentric and Eccentric Reducers to industries across Colombo and key cities in Sri Lanka, including Gampaha, Katunayake, Kandy, Trincomalee, Hambantota, and Jaffna. Our reducers are engineered to connect pipes of unequal diameters while maintaining smooth fluid flow and structural integrity, reducing the risk of turbulence and pressure loss in the system. These fittings are widely used in oil and gas pipelines, power generation units, chemical plants, water treatment systems, and marine applications where dependable flow transition is critical. Manufactured in accordance with international standards like ASME B16.9, our reducers are available in a wide variety of materials such as Stainless Steel, Carbon Steel, Low Alloy Steel, and High Nickel Alloys like Inconel and Hastelloy—offering superior strength, corrosion resistance, and long service life. We provide seamless, welded, and fabricated reducer fittings, complete with mill test certificates and custom packaging options for domestic and overseas clients.
Types of Buttweld Reducers Offered:
- Concentric Reducer – Symmetrical, cone-shaped reducer ideal for vertical piping and pump discharge applications
- Eccentric Reducer – Offset design that keeps one side flat, commonly used in horizontal pipelines to prevent air accumulation and cavitation
Dimensional Overview – ASME B16.9 Reducers:
- Size Range: ½” NB to 48” NB
- Wall Thickness: SCH 10, 20, 40, 80, 160, XXS
- Connection Ends: Beveled ends as per ASME B16.25 for seamless welding
- Reducer Types: Concentric (centerline aligned), Eccentric (offset)
- Fabrication Method: Seamless, ERW, or welded to meet project specifications
Relevant Standards for Buttweld Reducers:
- ASME B16.9 – Factory-made wrought buttwelding fittings
- ANSI B16.28 – Steel buttweld reducers for narrow tolerances
- MSS SP-75 – For high-strength pipeline components in critical systems
Materials and Grades We Supply:
- Stainless Steel: ASTM A403 WP304, 304L, 316, 316L, 321, 347, 904L, etc.
- Carbon Steel: ASTM A234 WPB / WPC
- Alloy Steel: ASTM A234 WP5, WP9, WP11, WP22
- High Nickel Alloys: Inconel 600 / 625, Monel 400, Hastelloy C276, Alloy 20
All reducers are tested for dimensional accuracy, surface finish, mechanical properties, and hydrostatic strength before dispatch.
Industries & Applications in Sri Lanka:
- Oil Refineries & Gas Distribution – High-pressure reducers for upstream and downstream networks
- Power & Energy – Suitable for boiler, turbine, and heat exchanger lines
- Water Supply & Irrigation Projects – Used for smooth flow transition between varying pipe sizes
- Shipbuilding & Marine Engineering – Salt-resistant fittings for engine cooling and ballast systems
- Infrastructure & Commercial Buildings – Used in fire protection, HVAC, and water pipeline networks
Also check: Buttweld End Cap Suppliers in Colombo, Sri Lanka
Frequently Asked Questions
What is the purpose of a Concentric or Eccentric Reducer?
Concentric and Eccentric Reducers are used to connect pipes of different diameters while maintaining a smooth flow transition. They help reduce pressure loss, prevent turbulence, and ensure structural integrity in piping systems.
What is the difference between a Concentric and Eccentric Reducer?
A Concentric Reducer maintains a common centerline, making it ideal for vertical piping. An Eccentric Reducer has an offset centerline, commonly used in horizontal pipes to avoid air accumulation or drainage issues.
Where can I buy Buttweld Reducers in Sri Lanka?
Prime Steel Corporation supplies high-quality Buttweld Concentric and Eccentric Reducers in Colombo and other cities like Gampaha, Katunayake, Kandy, Trincomalee, Hambantota, and Jaffna, serving various industries across Sri Lanka.
Which materials are available for Pipe Reducers at Prime Steel Corporation?
We offer pipe reducers in Stainless Steel, Carbon Steel, Low Alloy Steel, and High Nickel Alloys like Inconel and Hastelloy. All fittings are manufactured to ASME B16.9 standards and come with mill test certificates.
Frequently Asked Questions
What is a Stub End used for in piping systems?
A Stub End is used with a Lap Joint Flange to create a flanged connection that can be easily disassembled for inspection, maintenance, or replacement. It is ideal for systems requiring frequent dismantling.
What is the difference between Short Stub End and Long Stub End?
Short Stub Ends are commonly used with standard Lap Joint Flanges, while Long Stub Ends are used where additional length is required for fitting into specific piping layouts. The choice depends on system design and space availability.
Where can I purchase Stub Ends in Sri Lanka?
Prime Steel Corporation offers Short and Long Stub Ends in Colombo and across Gampaha, Katunayake, Kandy, Trincomalee, Hambantota, and Jaffna, serving a variety of industries across Sri Lanka.
What materials are available for Stub Ends at Prime Steel Corporation?
Our Stub Ends are available in Stainless Steel, Carbon Steel, Low Alloy Steel, and High Nickel Alloys, including Inconel and Hastelloy. All products are manufactured to ASME B16.9 and MSS SP-43 standards.
Looking for durable and cost-effective ASME B16.9 Reducers for your next industrial or export project? Reach out to us at::
sales@primesteelcorp.com
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