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The High-Pressure Stainless Steel F/M Thread Class 150 Tee is a versatile pipe fitting designed to create branch connections in threaded piping systems, combining female and male NPT threads for flexible installation. Constructed from 304 or 316 stainless steel, this tee features a reinforced branch and Class 150 rating, making it ideal for medium-pressure industrial and commercial applications.
Mixed Thread Design:
Female NPT (F) on the main line and male NPT (M) on the branch (or vice versa), enabling direct connection to threaded valves, gauges, or pipes without adapters.
Threads compliant with ANSI B1.20.1 (60° taper), providing leak-tight seals up to 300 PSI (Class 150) with PTFE tape or pipe dope.
Reinforced Branch Construction:
Thicker wall at the branch junction (1.2x main wall) withstands pressure loads, reducing stress concentration by 20% compared to standard tees.
Smooth internal radius (1.0x pipe wall thickness) minimizes turbulence, suitable for flow rates up to 500 GPM (4" tee).
Material & Performance:
304 stainless steel (ASTM A312) for general use; 316 stainless steel (ASTM A316) for corrosive media, with temperature range -20°C to 180°C (PTFE-sealed threads).
Rated for working pressures up to 300 PSI (Class 150), with schedule 40 wall thickness ensuring structural integrity in moderate-pressure systems.
Compliance & Versatility:
Meet ASME B16.11 and MSS SP-83 standards, available in sizes 1/8" to 4" NPS, with equal tee (all threads same size) and reducing tee (branch smaller) options.
Perfect for threaded branch connections in industrial and commercial systems:
HVAC Systems: Branching from main chilled water lines to air handling units in commercial buildings, with 304 stainless steel resisting humidity-induced corrosion.
Compressed Air Lines: Creating connections to air tools and valves in factory automation, with Class 150 rating suitable for 120 PSI air systems.
Plumbing & Water Works: Branching from main water mains to residential service lines, compliant with NSF/ANSI 61 for potable water applications.
Chemical Processing: Low-pressure chemical injection lines in refineries, with 316 stainless steel resisting mild acid and alkali exposure.
Q: What is the difference between F/M and M/F thread configurations?
A: F/M has female on the main and male on the branch; M/F reverses this, allowing flexibility in connecting to different threaded components.
Q: Can this tee be used with British Standard Pipe (BSP) threads?
A: No, NPT threads are incompatible with BSP; use a NPT-to-BSP adapter for cross-standard compatibility.
Q: How to prevent thread galling in stainless steel connections?
A: Apply a nickel-based anti-seize compound and avoid over-tightening; torque to 30 N·m for 1" threads to prevent damage.
Q: Is the tee suitable for vacuum applications?
A: Yes, rated for full vacuum (29" Hg), but use metal gaskets or anaerobic sealants for enhanced leak resistance in vacuum lines.
The High-Pressure Stainless Steel F/M Thread Class 150 Tee is a versatile pipe fitting designed to create branch connections in threaded piping systems, combining female and male NPT threads for flexible installation. Constructed from 304 or 316 stainless steel, this tee features a reinforced branch and Class 150 rating, making it ideal for medium-pressure industrial and commercial applications.
Mixed Thread Design:
Female NPT (F) on the main line and male NPT (M) on the branch (or vice versa), enabling direct connection to threaded valves, gauges, or pipes without adapters.
Threads compliant with ANSI B1.20.1 (60° taper), providing leak-tight seals up to 300 PSI (Class 150) with PTFE tape or pipe dope.
Reinforced Branch Construction:
Thicker wall at the branch junction (1.2x main wall) withstands pressure loads, reducing stress concentration by 20% compared to standard tees.
Smooth internal radius (1.0x pipe wall thickness) minimizes turbulence, suitable for flow rates up to 500 GPM (4" tee).
Material & Performance:
304 stainless steel (ASTM A312) for general use; 316 stainless steel (ASTM A316) for corrosive media, with temperature range -20°C to 180°C (PTFE-sealed threads).
Rated for working pressures up to 300 PSI (Class 150), with schedule 40 wall thickness ensuring structural integrity in moderate-pressure systems.
Compliance & Versatility:
Meet ASME B16.11 and MSS SP-83 standards, available in sizes 1/8" to 4" NPS, with equal tee (all threads same size) and reducing tee (branch smaller) options.
Perfect for threaded branch connections in industrial and commercial systems:
HVAC Systems: Branching from main chilled water lines to air handling units in commercial buildings, with 304 stainless steel resisting humidity-induced corrosion.
Compressed Air Lines: Creating connections to air tools and valves in factory automation, with Class 150 rating suitable for 120 PSI air systems.
Plumbing & Water Works: Branching from main water mains to residential service lines, compliant with NSF/ANSI 61 for potable water applications.
Chemical Processing: Low-pressure chemical injection lines in refineries, with 316 stainless steel resisting mild acid and alkali exposure.
Q: What is the difference between F/M and M/F thread configurations?
A: F/M has female on the main and male on the branch; M/F reverses this, allowing flexibility in connecting to different threaded components.
Q: Can this tee be used with British Standard Pipe (BSP) threads?
A: No, NPT threads are incompatible with BSP; use a NPT-to-BSP adapter for cross-standard compatibility.
Q: How to prevent thread galling in stainless steel connections?
A: Apply a nickel-based anti-seize compound and avoid over-tightening; torque to 30 N·m for 1" threads to prevent damage.
Q: Is the tee suitable for vacuum applications?
A: Yes, rated for full vacuum (29" Hg), but use metal gaskets or anaerobic sealants for enhanced leak resistance in vacuum lines.
