Koncentryczny reduktor ze spoiną doczołową ze stali węglowej | ASTM A234 WPB | ASME B16.9 | SCH40 SCH80 | Przemysłowe łączniki rurowe

Product Overview

The ASME B16.9 Carbon Steel Butt Weld Concentric Reducer is a critical piping component used to connect pipes of different diameters, with both ends sharing the same centerline and connected by butt-welding. Manufactured strictly in accordance with ASME B16.9 standardy, using swaging, expanding or combined forming processes, it ensures uniform wall thickness, accurate dimensions, secure connection and reliable sealing.

The product covers a wide range of carbon and low-alloy steel grades, suitable for applications from general fluid transmission to high-temperature and high-pressure services. With excellent manufacturing processes and strict quality control, it is widely used in oil, gaz, chemiczny, power, shipbuilding and other piping systems.

ASME B16.9 Carbon Steel Butt Weld Concentric Reducer

Technical Specifications

ASME B16.9 Carbon Steel Butt Weld Concentric Reducer

Key Features

◆ Precision Manufacturing, Accurate Dimensions
Advanced forming processes including swaging, expanding or combined swaging-expanding ensure uniform wall thickness and strict compliance with ASME B16.9 dimensional tolerances. Out-of-roundness ≤ 1% of corresponding OD, centerlines coincide with eccentricity tolerance ≤ ±5mm.

◆ High-Quality Materials, Reliable Performance
Manufactured from premium carbon steel (20#, A234 WPB, itp.) with excellent mechanical properties and weldability, suitable for low-medium and high-pressure piping systems.

◆ Concentric Design, Minimal Flow Resistance
Both ends share the same centerline, ensuring smooth fluid passage, effectively reducing turbulence and pressure loss – ideal for vertical piping systems with high flow stability requirements.

◆ Full Traceability Quality Control
Each batch comes with material test certificates; W 10204 3.1/3.2 certificates available upon request to ensure full product traceability.

ASME B16.9 Carbon Steel Butt Weld Concentric Reducer

Aplikacje

Concentric reducers are widely used in various piping systems, particularly at critical locations where pipe diameter changes are required:

• Olej & Gas Industry: Long-distance pipelines, station process piping, olej & gas gathering systems
• Chemiczny & Petrochemical Industry: Reactor and separator connections, corrosive media transmission pipelines
• Power Industry: Boiler headers, main steam piping, power plant piping systems
• Shipbuilding: Engine room piping, ballast water systems, marine piping
• Pharmaceutical & Food Industry: Sterile piping systems, sanitary fluid transmission
• Budowa & Komunalny: High-rise building fire protection piping, systemy grzewcze, zaopatrzenie w wodę & drenaż

Typical installation locations include pump suction/discharge, valve connections, flow meter installations, compressor piping, and pipe branch connections.

Packing Method

• Small-diameter fittings (≤DN200): Wrapped with plastic film (moisture-proof and rust-proof), packed in export-standard carton boxes or wooden cases
• Large-diameter fittings (>DN200): Individually packed with plastic caps or rubber strips on bevel ends
• Surface Protection: Coated with anti-rust oil or varnish, then wrapped with plastic film (minimum 10 layers)
• Pallet Securing: Loaded on wooden pallets and fastened with steel wires to prevent loosening during long-distance transit

Customized packing (np., vacuum packing, fumigation treatment) available upon request

ASME B16.9 Carbon Steel Butt Weld Concentric Reducer

Shipment Method

Supported by sea, kolej żelazna, powietrze, or land transport; container loading and securing services available

Partnered with long-term stable logistics providers to ensure timely delivery to port or designated locations

Warunki płatności

T/T, L/C w zasięgu wzroku, Western Union, PayPal, Credit Card, itp.

Profil firmy

Luoyang Datang Energy Tech Co., z oo jest profesjonalnym dostawcą zaworów przemysłowych, dedicated to providing reliable flow control solutions for water treatment, chemiczny, olej & gaz, HVAC, i przemysłowych systemów rurociągów na całym świecie. All products are manufactured to international standards with CE and ISO 9001 certyfikaty. With over 10 years of experience, a modern facility of 80,000 m², I 200+ professional employees, we serve customers in 10+ countries with quality products, competitive pricing, and reliable delivery.

ASME B16.9 Carbon Steel Butt Weld Concentric Reducer

Często zadawane pytania

Pytanie 1: What is the difference between concentric and eccentric reducers?
Concentric reducers have both ends aligned on the same centerline, suitable for vertical piping or applications requiring high flow stability. Eccentric reducers have one end offset, suitable for horizontal piping to avoid liquid or gas accumulation.

Pytanie 2: How to choose between concentric and eccentric reducers in selection?

Concentric reducers have both ends aligned on the same centerline, suitable for vertical piping or applications requiring high flow stability, commonly used at pump suction, compressor inlet/outlet where symmetrical flow is critical. Eccentric reducers (flat-bottom or flat-top) have one end offset, suitable for horizontal piping to effectively avoid liquid pooling at the bottom or gas accumulation at the top, widely used in chemical and pharmaceutical processes with strict residue requirements. Selection depends on piping orientation (horizontal/vertical), media characteristics (solid particles presence, vaporization tendency), and installation space.

Pytanie 3: What is the difference between ASTM A234 WPB, A105, I 20# carbon steels? How to select?

ASTM A234 WPB is the dedicated material for American standard forged pipe fittings, suitable for high-temperature and high-pressure service with operating temperature range of -29°C to 425°C, offering excellent weldability and impact toughness. A105 is also American standard forged steel but typically used for flanges and valves, with similar chemical composition but different heat treatment requirements. 20# is Chinese standard high-quality carbon structural steel, cost-effective for general medium-low pressure applications. Selection recommendation: A234 WPB for oil & gas long-distance pipelines and high-temperature steam piping; 20# or Q235 for conventional water treatment and low-pressure fluid piping.

Pytanie 4: What are the standard requirements for bevel form and angle on butt-weld concentric reducers? How does it affect installation welding?

Per ASME B16.9, butt-weld fittings are default machined with welding bevel, standard bevel angle of 37.5° ± 2.5° with land height of 1.6mm ± 0.8mm. Proper bevel form (V-groove, U-groove or compound groove) directly impacts weld quality and joint strength. For heavy-wall fittings (SCH80 and above), U-groove or double V-groove is recommended to reduce welding stress and filler metal consumption. Ensure bevel surface is clean of oil and rust before installation, and use matching PQR (Procedure Qualification Record) and electrodes per base material.

Pytanie 5: How is the wall thickness transition zone designed on concentric reducers? Does it cause stress concentration?

The wall thickness transition on concentric reducers typically adopts tapered or curved transition design, with transition length and taper directly affecting local stress concentration factors. Per ASME B16.9, the transition zone should be smooth and gradual without abrupt steps. For high-pressure or fatigue load applications (np., compressor pulsating piping, reciprocating pump suction/discharge), higher schedule fittings (np., SCH160 or XXS) with FEA (Finite Element Analysis) are recommended to verify stress distribution meets design codes (ASME VIII or ASME B31.3).