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The High-Performance Stainless Steel BW (Butt-Weld) Eccentric Reducer is a specialized pipe fitting designed to connect pipes of different diameters in systems carrying gas-liquid mixtures, minimizing air accumulation and pressure loss. Constructed from seamless 304 or 316 stainless steel, this reducer features an eccentric design (offset centerline) and butt-weld ends, making it ideal for horizontal pipelines where liquid retention is critical.
Eccentric Design Benefits:
Asymmetrical shape (flat top, curved bottom) prevents gas accumulation in horizontal lines, reducing slug flow and improving flow stability in two-phase systems.
Smooth transition radius (1.5x pipe diameter) ensures laminar flow, with pressure loss 15% lower than standard concentric reducers in gas-dominated flows.
Robust Material Construction:
ASTM A312 stainless steel (304/316) with solution annealing for uniform microstructure, resisting stress corrosion cracking in high-pH and chloride environments.
Rated for working pressures up to 2,000 PSI (316 stainless steel, schedule 80) and temperatures from -196°C (LNG) to 650°C (steam).
Precision Welding Ends:
Butt-weld ends compliant with ANSI B16.25, enabling full-penetration welds for schedule 40/80 pipes, with optional radiographic testing (RT) for critical applications.
Available in sizes 2" to 36" NPS, with common reducing ratios (e.g., 10" to 8", 6" to 4") and custom sizes upon request.
Corrosion & Wear Resistance:
316 stainless steel variant with molybdenum alloying resists pitting in seawater and acidic media, while 304 is ideal for general industrial use.
Perfect for two-phase flow and horizontal pipeline systems:
Oil & Gas Upstream: Reducing diameters in wellhead flowlines and separators, preventing gas trapping in horizontal runs to maintain efficient production.
HVAC Systems: Connecting large-diameter chilled water mains to smaller coil lines in commercial buildings, with eccentric design minimizing air bubble formation.
Chemical Processing: Transitioning between distillation column outlets and transfer pipes in refineries, ensuring smooth flow of vapor-liquid mixtures.
Marine Engineering: Reducing sizes in bilge and ballast water lines on ships, with 316 stainless steel enduring saltwater corrosion and dynamic loading.
Q: How does the eccentric design prevent gas accumulation?
A: The flat top surface allows gas to flow along the upper part of the pipe, while liquid stays at the bottom, reducing slug flow in horizontal installations.
Q: Can this reducer be used in vertical pipelines?
A: While primarily for horizontal use, it can be installed vertically, though concentric reducers are more suitable for vertical applications.
Q: What is the recommended weld prep for thick-walled reducers?
A: Use a J-groove or U-groove for walls >12mm to ensure full penetration, following ASME BPVC Section IX welding guidelines.
Q: Are there non-magnetic options for sensitive applications?
A: Yes, 316L stainless steel offers low magnetic permeability, suitable for use near magnetic separators and MRI equipment.
The High-Performance Stainless Steel BW (Butt-Weld) Eccentric Reducer is a specialized pipe fitting designed to connect pipes of different diameters in systems carrying gas-liquid mixtures, minimizing air accumulation and pressure loss. Constructed from seamless 304 or 316 stainless steel, this reducer features an eccentric design (offset centerline) and butt-weld ends, making it ideal for horizontal pipelines where liquid retention is critical.
Eccentric Design Benefits:
Asymmetrical shape (flat top, curved bottom) prevents gas accumulation in horizontal lines, reducing slug flow and improving flow stability in two-phase systems.
Smooth transition radius (1.5x pipe diameter) ensures laminar flow, with pressure loss 15% lower than standard concentric reducers in gas-dominated flows.
Robust Material Construction:
ASTM A312 stainless steel (304/316) with solution annealing for uniform microstructure, resisting stress corrosion cracking in high-pH and chloride environments.
Rated for working pressures up to 2,000 PSI (316 stainless steel, schedule 80) and temperatures from -196°C (LNG) to 650°C (steam).
Precision Welding Ends:
Butt-weld ends compliant with ANSI B16.25, enabling full-penetration welds for schedule 40/80 pipes, with optional radiographic testing (RT) for critical applications.
Available in sizes 2" to 36" NPS, with common reducing ratios (e.g., 10" to 8", 6" to 4") and custom sizes upon request.
Corrosion & Wear Resistance:
316 stainless steel variant with molybdenum alloying resists pitting in seawater and acidic media, while 304 is ideal for general industrial use.
Perfect for two-phase flow and horizontal pipeline systems:
Oil & Gas Upstream: Reducing diameters in wellhead flowlines and separators, preventing gas trapping in horizontal runs to maintain efficient production.
HVAC Systems: Connecting large-diameter chilled water mains to smaller coil lines in commercial buildings, with eccentric design minimizing air bubble formation.
Chemical Processing: Transitioning between distillation column outlets and transfer pipes in refineries, ensuring smooth flow of vapor-liquid mixtures.
Marine Engineering: Reducing sizes in bilge and ballast water lines on ships, with 316 stainless steel enduring saltwater corrosion and dynamic loading.
Q: How does the eccentric design prevent gas accumulation?
A: The flat top surface allows gas to flow along the upper part of the pipe, while liquid stays at the bottom, reducing slug flow in horizontal installations.
Q: Can this reducer be used in vertical pipelines?
A: While primarily for horizontal use, it can be installed vertically, though concentric reducers are more suitable for vertical applications.
Q: What is the recommended weld prep for thick-walled reducers?
A: Use a J-groove or U-groove for walls >12mm to ensure full penetration, following ASME BPVC Section IX welding guidelines.
Q: Are there non-magnetic options for sensitive applications?
A: Yes, 316L stainless steel offers low magnetic permeability, suitable for use near magnetic separators and MRI equipment.
