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The Heavy-Duty Stainless Steel BW (Butt-Weld) 45-Degree Elbow is a premium pipe fitting designed to change direction in high-pressure, high-temperature piping systems while maintaining structural integrity and flow efficiency. Constructed from seamless 304 or 316 stainless steel, this elbow features butt-weld ends (ANSI B16.25 compliant) and a 1.5D radius, making it ideal for heavy-duty applications requiring minimal pressure loss and vibration resistance.
Robust Seamless Construction:
Manufactured from extruded stainless steel (304 for general use, 316 for corrosive media), with wall thickness compliant with schedule 40/80 and yield strength ≥250 MPa.
Butt-weld ends (beveled 37°-45°) meet ANSI B16.25 and ASME B1.20.7 standards, ensuring full penetration welds and leak-free connections.
Flow-Optimized Design:
1.5D centerline radius reduces pressure loss by 30% compared to short-radius elbows, with a polished internal bore (Ra ≤1.6μm) minimizing turbulence and scale buildup.
45° angle distributes stress evenly during high-flow conditions, suitable for systems with up to 1,500 GPM flow rate (12" elbows).
Environmental Resistance:
316 stainless steel variant resists chloride-induced pitting (critical in marine and saltwater applications), with a passivated surface extending service life in harsh environments.
Temperature range: -250°C to 800°C (with proper welding procedures), suitable for cryogenic liquids and high-temperature steam lines.
Installation Compliance:
Available in sizes 1" to 48" NPS, with custom wall thicknesses for special projects (e.g., nuclear-grade piping meeting ASME BPVC Section III).
Magnetic particle inspection (MPI) and hydrostatic testing (1.5x MAWP) ensure zero defects in critical applications.
Perfect for high-demand industrial piping systems:
Fire Protection: NFPA 20-compliant elbows in wet/dry sprinkler systems, ensuring reliable flow in commercial high-rises and industrial facilities.
Chemical Processing: Diverting corrosive media in reaction vessels and heat exchangers, with 316 stainless steel meeting CEPDG standards for hazardous chemicals.
Power Generation: Steam and condensate lines in thermal plants, withstanding rapid temperature changes (500°C to ambient) and high-pressure cycles (up to 200 bar).
Marine & Offshore: Seawater intake systems and subsea pipelines, with 316 stainless steel enduring constant exposure to saltwater and dynamic loading.
Q: What is the difference between 1.5D and short-radius (1D) elbows?
A: 1.5D elbows (long-radius) offer better flow characteristics and lower pressure loss, while 1D elbows are more compact but increase turbulence and pressure drop.
Q: Can these elbows be used in underground pipelines?
A: Yes, but apply anti-corrosion wrap (e.g., polyethylene tape) and use a concrete encasement for extra protection in corrosive soils.
Q: What welding electrodes are recommended for 316 stainless steel?
A: Use E316L-16 (GTAW) or E316L-17 (SMAW) electrodes to match the base metal's corrosion resistance and ductility.
Q: How to measure the elbow's straightness after welding?
A: Use a laser alignment tool to ensure the elbow's axis deviation is ≤1mm/m, critical for maintaining pipeline integrity in long runs.
The Heavy-Duty Stainless Steel BW (Butt-Weld) 45-Degree Elbow is a premium pipe fitting designed to change direction in high-pressure, high-temperature piping systems while maintaining structural integrity and flow efficiency. Constructed from seamless 304 or 316 stainless steel, this elbow features butt-weld ends (ANSI B16.25 compliant) and a 1.5D radius, making it ideal for heavy-duty applications requiring minimal pressure loss and vibration resistance.
Robust Seamless Construction:
Manufactured from extruded stainless steel (304 for general use, 316 for corrosive media), with wall thickness compliant with schedule 40/80 and yield strength ≥250 MPa.
Butt-weld ends (beveled 37°-45°) meet ANSI B16.25 and ASME B1.20.7 standards, ensuring full penetration welds and leak-free connections.
Flow-Optimized Design:
1.5D centerline radius reduces pressure loss by 30% compared to short-radius elbows, with a polished internal bore (Ra ≤1.6μm) minimizing turbulence and scale buildup.
45° angle distributes stress evenly during high-flow conditions, suitable for systems with up to 1,500 GPM flow rate (12" elbows).
Environmental Resistance:
316 stainless steel variant resists chloride-induced pitting (critical in marine and saltwater applications), with a passivated surface extending service life in harsh environments.
Temperature range: -250°C to 800°C (with proper welding procedures), suitable for cryogenic liquids and high-temperature steam lines.
Installation Compliance:
Available in sizes 1" to 48" NPS, with custom wall thicknesses for special projects (e.g., nuclear-grade piping meeting ASME BPVC Section III).
Magnetic particle inspection (MPI) and hydrostatic testing (1.5x MAWP) ensure zero defects in critical applications.
Perfect for high-demand industrial piping systems:
Fire Protection: NFPA 20-compliant elbows in wet/dry sprinkler systems, ensuring reliable flow in commercial high-rises and industrial facilities.
Chemical Processing: Diverting corrosive media in reaction vessels and heat exchangers, with 316 stainless steel meeting CEPDG standards for hazardous chemicals.
Power Generation: Steam and condensate lines in thermal plants, withstanding rapid temperature changes (500°C to ambient) and high-pressure cycles (up to 200 bar).
Marine & Offshore: Seawater intake systems and subsea pipelines, with 316 stainless steel enduring constant exposure to saltwater and dynamic loading.
Q: What is the difference between 1.5D and short-radius (1D) elbows?
A: 1.5D elbows (long-radius) offer better flow characteristics and lower pressure loss, while 1D elbows are more compact but increase turbulence and pressure drop.
Q: Can these elbows be used in underground pipelines?
A: Yes, but apply anti-corrosion wrap (e.g., polyethylene tape) and use a concrete encasement for extra protection in corrosive soils.
Q: What welding electrodes are recommended for 316 stainless steel?
A: Use E316L-16 (GTAW) or E316L-17 (SMAW) electrodes to match the base metal's corrosion resistance and ductility.
Q: How to measure the elbow's straightness after welding?
A: Use a laser alignment tool to ensure the elbow's axis deviation is ≤1mm/m, critical for maintaining pipeline integrity in long runs.
