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This UNS S31803 duplex stainless steel concentric reducer is a high-performance butt-weld pipe fitting manufactured strictly in accordance with ASTM A815 standard. Different from ordinary 304 and 316 stainless steel reducers, duplex S31803 material possesses dual-phase microstructure of ferrite and austenite, providing much higher mechanical strength, excellent chloride stress corrosion resistance and superior pitting corrosion resistance. The whole fitting is precisely formed with smooth inner and outer surfaces, uniform wall thickness and no deformation. The professional butt-weld bevel end ensures perfect welding connection, tight sealing and zero leakage under long-term working conditions. It greatly improves the stability and safety of pipeline systems in corrosive environments, making it more durable and reliable than conventional stainless steel pipe reducers.
2. Complete Product Technical Parameters
Parameter
Specification
Material Grade
UNS S31803 / Duplex Stainless Steel
Executive Standard
ASTM A815, ASME B16.9
Product Type
Concentric Reducer
Connection Type
Butt Welding
Wall Thickness
STD / SCH40 / SCH80 Customized
Available Size
1"–48 Inch Custom Sizes
Feature
High strength, anti-corrosion, pressure resistant
3. Function, Application & After-sales Service
The main function of the duplex concentric reducer is to smoothly change the pipe diameter in pipeline systems, stabilize fluid flow and reduce turbulence and pressure loss. It is widely used in chemical engineering, offshore platforms, seawater treatment, oil and gas transportation, desalination projects and chloride-containing industrial piping systems. All our products undergo strict quality inspection before delivery. We adopt standard export packaging with waterproof film, shockproof protection and wooden box packing to avoid damage during transportation. We support flexible payment methods, fast delivery and customized sizes according to customer drawings. For product quality problems, size errors or transport damage, we support complete return and exchange after-sales service. Please contact us for bulk price, technical parameters and custom solutions!
TOBO GROUP sales head offce in Shanghai.
We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicia... TOBO GROUP sales head offce in Shanghai.
We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicia...
