Buttweld Concentric Reducer

Standard: ASME B16.9, MSS SP-75, DIN 2616, EN 10253
Size Range: 1/2″ – 24″ (Seamless); 24″ – 72″ (Welded/Fabricated) or custom
Wall Thickness: SCH 10S, 40S, STD, 80S, 120, 160, XXS
Materials: carbon steel, stainless steel

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Details of The Pipe Reducer

Butt weld steel pipe reducers are pipe fittings with two ports of different diameters. They can be used to connect pipes of different diameters by welding, providing a smooth transition for fluid flow. This reduces resistance and pressure loss, and helps to maintain efficient operation of the pipeline system.
Butt weld steel pipe reducers also allow for a flexible layout of the pipeline system in a limited space, providing convenience for smooth operation and layout adjustments.

Our reducers are commonly used with our Seamless Steel Pipes and ASME B16.5 Flanges.

Concentric vs. Eccentric Reducers

We provide both:

Concentric Reducers: Designed to join pipe sections on the same center line. These are ideal for vertical piping to prevent turbulence and for general fluid transport.
Eccentric Reducers: Feature one flat side, allowing the center line of the pipes to be offset. These are vital for horizontal piping to prevent air pockets (in suction lines) or to facilitate liquid drainage.

butt weld Concentric vs. Eccentric Reducers

Technical Specifications & Material Grades

Our reducers are engineered for extreme durability under high-pressure conditions.

Feature	Detailed Specifications
Standard	ASME B16.9, MSS SP-75, DIN 2616, EN 10253
Size Range	1/2″ – 24″ (Seamless); 24″ – 72″ (Welded/Fabricated)
Wall Thickness	SCH 10S, 40S, STD, 80S, 120, 160, XXS
Carbon Steel	ASTM A234 WPB, WPC; A420 WPL6 (Low-Temp)
Stainless Steel	ASTM A403 WP304/304L, WP316/316L, WP321, WP347
Alloy Steel	ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91

Material Grades

We manufacture and export concentric reducers in certified materials to match your connecting pipes.

Carbon Steel (High Demand):

ASTM A234 WPB: The industry standard for moderate/high-temperature service. Widely used in pressure piping.

ASTM A420 WPL6: Impact-tested carbon steel for low-temperature applications (e.g., cryogenic systems).

Stainless Steel:

ASTM A403 WP304/304L: Standard corrosion resistance.

ASTM A403 WP316/316L: Enhanced resistance to chlorides and acids.

Alloy Steel:

ASTM A234 WP5, WP9, WP11, WP22, WP91: For high-pressure power generation and steam lines

buttweld reducer factory

Quality Control & Testing Protocols

To guarantee zero-defect delivery, each reducer undergoes:

Dimensional Verification: Checking OD, ID, and Face-to-Face dimensions against B16.9 tolerances.
NDT Inspection: Ultrasonic (UT) and Magnetic Particle (MPI) testing to ensure no cracks or inclusions in the transition area.
Positive Material Identification (PMI): Verifying alloy and stainless steel grades before shipment.
Third-Party Inspection: We welcome inspections from SGS, BV, TUV, and Intertek.

Packaging & Global Logistics

We understand the importance of receiving products in pristine condition:

Protection: Plastic end caps protect the bevels from transit damage.
Packing: Securely packed in seaworthy plywood cases or pallets.
Marking: Clear, durable heat-number and size stamping for easy warehouse identification.

buttweld reducer packaging factory

Application:

Carbon steel pipe Reducers can be used for the control of water, gas, steam, oil, and corrosive media in chemical, petroleum, metallurgy, light industry, electric power, plumbing, food, pharmaceutical, fiber, ink, and other industries.
Sanitary valves, fluid fittings, special fittings of special industries, and mechanical supporting equipment can be used in dairy, pharmaceutical, beer, beverage, edible oil, and other industries to meet their professional requirements.
Reducers are produced according to different standard systems which can be adapted to the corresponding standard system of supporting equipment, JS FITTINGS can produce non-standard reducers according to the requirements of users, and reducers are suitable for special purposes.

Specification Information

Product Name	Carbon Steel buttweld Pipe Reducer
Product degree	Concentric reducer, Eccentric reducer,etc..
Product size	1/2″-48″ etc..
Product wall thickness	Sch5–XXS etc..
Product material	A234-WPB, A420-WPL6, WP304L, WP316L, WP304, WP316, etc..
Standard	ASTM DIN GB JIS EN GOST etc..
Surface Preparation	Anti-rust black painting, anti-rust varnish, transparent anti-rust oil, hot galvanized, sandblasting.
Packing detail	Free fumigation wooden cases, and pallets. A customized package is acceptable
Product delivery time	3-5 days for stock goods, 15-30 days for one container, more 10 days for one more container.
Minimum Order Quantity	According to the customer’s requirement
Application Range	It is widely used in the petroleum, chemical industry, nuclear power plant, food manufacturing, construction, shipbuilding, paper making, medicine, and other industries.
please read carefully before placing the order	1. Generally, black painting for anti-corrosion and high-temperature resistant.
	2. Please confirm all the product specifications and marks with us before placing the order.
	3. JS FITTINGS has complete and advanced testing equipment to ensure the good quality of the pipe fittings.
	4. JS FITTINGS is a professional manufacturer with 36 years of experience, the price is competitive and the quality is excellent, please purchase freely.
	5. The warranty period of JS fittings is one year. We appreciate your feedback.

FAQ:

Q: How do I properly order a butt weld reducer?
A: You must specify both end sizes (e.g., 4″ x 2″), the schedule (wall thickness) for each end, and the type (concentric or eccentric).
Q: What are the key standards?
A: Butt weld fittings are typically manufactured according to ASME B16.9, which standardizes their dimensions and tolerances.
Q: What is the benefit of butt welding?
A: Welded joints provide higher strength and better leak resistance compared to threaded or flanged connections, while also offering a more compact layout.

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