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Coupling 1/4'' x 1'' NPT 316L cl.3000
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Description
Coupling 1/4'' x 1'' NPT 316L cl.3000
- Internal threads: 1/4'' x 1''
- Thread type: NPT
- Pressure rating: class 3000
- Material: stainless Steel 316/316L
- Welding steel
- Application: reducing muff: boilers, high-pressure installations, high-temperature installations, refineries, marine industry
- Certificate 3.1 available upon request (free of charge)
- Origin: European Union

Information about coupling NPT 316L
Reducing coupling 1/4'' x 1'' 316L NPT stainless steel - belongs to the category of threaded fittings "high-pressure connections". Couplings are available in all inch sizes. Each fitting has its size, grade, melt number, and pressure class stamped on it. They guarantee safety and durability in installations. All threaded fittings come with a 3.1 certification.
Learn more about threaded couplings here>>
Grade of Steel 316 / 316L – is the material from which the muff is made. It is a very popular stainless steel with high corrosion resistance. It has excellent welding and forming properties.
Other Names: DIN 1.4401, 1.4404, SS 316, AISI316, AISI316L, SS316, SS316L
Applications: Heat exchangers, pharmaceutical devices, dairy industry, brewing industry, marine fittings, coastal architecture, and food industry.
Advantages of Grade 316 / 316L: Non-magnetic steel, excellent ductility, outstanding toughness, superb weldability, good strength, and a wide range of operating temperatures.
Other sizes couplings are also available upon request. Contact us at phone number 0048 632614202 or send an inquiry to email: biuro@polberis.pl. We will prepare a price offer for you.
Technical data
| Coupling Type | Reducing Coupling |
| Material | Stainless Steel |
| Pressure | Pressure Range 101–250 bar |
| Connection 1 | 1'' |
| Thread Type – Connection 1 | NPT Thread |
| Connection 2 | 1/4'' |
| Thread Type – Connection 2 | NPT Thread |
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Elbow 1/4" NPT A105 90° Class 3000
Tee 1 1/2'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Tee 1 1/4'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Tee 1'' NPT cl.3000 A105
- material: steel for welding A105 (P245GH, P280GH)
- pressure class: 3000lbs (206bar)
- certificate 3.1
Reduction 1 1/4''x1 1/2'' NPT hexagonal nut-screw WZ
- redukcja wysokociśnieniowa 5/4''x3/2''
- atest 3.1
Reduction 1''x1 1/4'' NPT hexagonal nut-screw WZ
- redukcja wysokociśnieniowa 1''x5/4''
- atest 3.1
Reduction 1/2''x1 1/4'' NPT hexagonal nut-screw WZ
- redukcja wysokociśnieniowa 1/2''x5/4''
- atest 3.1
Elbow 1/2" NPT A105 45° Class 3000 206 Bar
Plug 1'' NPT stainless 321
- stainless steel 321 321 1.4541 SS321 AISI321
- certificate 3.1 at the request of the customer (free of charge)
Coupling 2'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Coupling 1'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Reducer bush 3/4''x1/4'' NPT 316L Hex
- stainless steel 316L (1.4404 A182)
- orgin: European Union
Reduction nipple 1 1/4''x1 1/2'' NPT 206bar A105
Plug 1/4'' BSP 316L Stainless Steel
- High-pressure plug
- 3.1 material certificate available on request (free of charge)
Coupling 3/8" socket weld A105 cl.3000
- mufa do spawania rur
- atest 3.1
Coupling 3/4" x 3/8" galvanized cast iron
Coupling 3/8'' steel for welding
Reducing Coupling 3/4''x1/2'' Galvanized Cast Iron
Reducing Coupling 1/2" × 3/8" Galvanized Malleable Iron
Coupling 1" socket weld A105 cl.3000
Coupling 1/2" socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1 1/2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Hex coupling 3/4" steel
- thread type BSP, that is standard Polish thread, otherwise known as cylindrical, straight, Rp, G
- high pressure coupling
Hex coupling 1/4" steel
- thread type BSP, that is standard Polish thread, otherwise known as cylindrical, straight, Rp, G
- high pressure coupling
Hex coupling 3/8" steel
- thread type BSP, that is standard Polish thread, otherwise known as cylindrical, straight, Rp, G
- high pressure coupling
Coupling 1/8'' steel for welding
Coupling 1'' steel for welding
Coupling 1 1/2'' steel for welding
Coupling 2 1/2'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1 1/2'' BSP stainless steel 316
Coupling 1/2'' steel for welding
Reducing coupling 1/4''- 3/8'' BSP steel
- steel coupling
Coupling 1/8" BSP Stainless Steel 316 Cast (1.4408)
Coupling 1/8" Galvanized Malleable Iron
Coupling 1/4" Galvanized Malleable Iron
Coupling 3/8" Galvanized Malleable Iron
Coupling 1/2" Galvanized Malleable Iron
Mufa 3/4'' żeliwo ocynk
Coupling 1 1/4" Galvanized Malleable Iron
Coupling 1 1/2" Galvanized Malleable Iron
Coupling 2 1/2" Galvanized Malleable Iron
Coupling 3/4'' steel for welding
Coupling 1/4" socket weld A105 cl.3000
- mufa do spawania rur
- atest 3.1
Coupling 1/2'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 3/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1" socket weld 316L cl.3000
- mufa do spawania
- atest 3.1
- pochodzenie: Unia Europejska
Reducing Coupling 2 1/2" × 1" BSP Class 3000 Carbon Steel A105N
- welding sleeve
- 3.1 certificate
- origin: European Union
Coupling 1 1/4'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 3/8'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1 1/2'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 2'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1/4'' BSPT A105 Class 3000 Steel
- stal kotłowa do spawania
- gwint stożkowy BSPT (wg. ISO7Rc)
- do wysokiego ciśnienia 206bar
- atest 3.1
Coupling 3/4" BSPT Carbon Steel A105 Class 3000 (206 bar)
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate
Coupling 1" BSPT Carbon Steel A105 Class 3000 (206 bar)
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate
Coupling 2" BSPT Carbon Steel A105 Class 3000 (206 bar)
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate
Coupling 1/2'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1/8" BSP Long 33 mm Carbon Steel S235JR
Coupling 1/8'' BSP 206bar 304L
Coupling 1/2" BSP Stainless Steel 316Ti (1.4571) PN50
Reducing Coupling 1/4" × 1/8" Galvanized Malleable Iron
Reducing Coupling 3/8" × 1/8" Galvanized Malleable Iron
Reducing Coupling 3/8" × 1/4" Galvanized Malleable Iron
Reducing Coupling 1/2" × 1/4" Galvanized Malleable Iron
Reducing Coupling 3/4" × 1/4" Galvanized Malleable Iron
Reducing Coupling 1" × 3/8" Galvanized Malleable Iron
Reducing Coupling 1" × 1/2" Galvanized Malleable Iron
Reducing Coupling 1" × 3/4" Galvanized Malleable Iron
Reducing Coupling 1 1/4" × 1/2" Galvanized Malleable Iron
Reducing Coupling 1 1/4" × 3/4" Galvanized Malleable Iron
Reducing Coupling 1 1/4" × 1" Galvanized Malleable Iron
Reducing Coupling 1 1/2" × 3/4" Galvanized Malleable Iron
Reducing Coupling 1 1/2" × 1" Galvanized Malleable Iron
Reducing Coupling 1 1/2" × 1 1/4" Galvanized Malleable Iron
Reducing Coupling 2 1/2" × 1 1/4" Galvanized Malleable Iron
Reducing Coupling 2 1/2" × 1 1/2" Galvanized Malleable Iron
Coupling 1'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/2'' BSP A350 LF2 cl.3000
Coupling 3/4'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/4'' BSP A350 LF2 cl.3000
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 1/4'' x 1/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/8'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 1/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/2'' x 3/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 3/8'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3/4'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 3/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/2'' x 3/4'' stainless steel 316 BSP
- stal nierdzewna gat. 316
Coupling 2'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1 1/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2'' x 1 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 2 1/2'' x 2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3'' x 2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 4'' x 3'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 2 1/2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1 1/2'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Coupling 1 1/4'' BSP 206bar 304L
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 3/8" BSPT Class 3000 ASTM A105
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate
Coupling 1/2'' BSP stainless steel 316
Coupling 1/8'' BSP stainless steel 316
Coupling 1/4'' BSP stainless steel 316
Coupling 3/8'' BSP stainless steel 316
Coupling 3/4'' BSP stainless steel 316
Coupling 1'' BSP stainless steel 316
Coupling 1 1/4'' BSP stainless steel 316
Coupling 2'' BSP stainless steel 316
Coupling 2 1/2'' BSP stainless steel 316
Coupling 3'' BSP stainless steel 316
Coupling 4'' BSP stainless steel 316
Pipe nipple 1/4'' NPT 150mm A106
- material: A106 (P265GH K18 ST.45.8 1.0405)
- certificate 3.1
Reduction nipple 1/2'' - 1'' BSP 316
Tee 1''x3/4'' socket weld 316L cl.3000
Tee 1''x3/8'' socket weld 316L cl.3000
- High-pressure reducing tee
- 3.1 certificate
- Origin: European Union
Stainless nipple 1'' 316
- nipple 1'' stainless
Weld-on pipe nipple 1'' 316L
Angle union 1'' 90 degrees 316
Stainless nipple union 1'' BSP
Elbow 1'' socket weld 316L cl.3000 45 degrees
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Union 1'' socket weld 316L cl.3000
- śrubunek do spawania
- do łączenia rur
Stainless pipe nipple 1'' 316L NPT 100mm
Tee 1''x1/2'' socket weld 316L cl.3000
- High-pressure reducing tee
- 3.1 certificate
- Origin: European Union
Nipple stainless elbow 1'' 316 male female
Stainless steel nipple 1'' x 3/8'' 316
- złączka gwintowana nierdzewna
Stainless steel nipple 1'' x 3/4'' 316
- złączka gwintowana nierdzewna
Stainless steel reduction nipple 1 1/4'' x 1'' 316
Stainless steel reduction nipple 1 1/2'' x 1'' 316
Stainless elbow 1'' 316
Reduction 1''x1/4'' 316 nut-screw
- stal nierdzewna
Reduction 1''x3/8'' 316 nut-screw
- stal nierdzewna
Reduction 1''x1/2'' 316 screw-nut
- stal nierdzewna
Reduction 1''x3/4'' 316 nut-screw
- stal nierdzewna
Reduction 1 1/4''x1'' 316 nut-screw
- stal nierdzewna
Reduction 1 1/2''x1'' 316 nut-screw
- stal nierdzewna
Reduction 2 1/2''x1'' 316 nut-screw
- stal nierdzewna
Tee 1'' socket weld 316L cl.3000
- welded tee
- stainless steel
- 3.1 certificate
- origin: European Union
Ball valve 1" 316 50bar male female
- stal nierdzewna
- ciśnienie: 50 bar
Plug 1'' BSP Stainless Steel 316
Cap 1'' stainless steel 316
- material: stainless steel 316
- certificate 3.1 at the request of the customer (free of charge)
Stainless ball valve 1" 316 40bar
- zawór nierdzewny
Stainless steel nipple 3/8'' x 1/4'' 316
- złączka gwintowana nierdzewna
Stainless nipple 1/4'' 316
- nipple 1/4'' stainless
Weld-on pipe nipple 1/4'' 316L
Stainless nipple union 1/4'' BSP
Reduction 1/4'' - 1/2'' BSP 316L cl. 3000 MT FM adapter
Coupling 1/4'' BSP 316L cl.3000 206bar
- high-pressure coupling
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Half Coupling 1/4'' BSPT 316L Class 3000
- Half coupling for welding
- 3.1 material certificate available on request (free of charge)
- Origin: European Union
Nipple stainless elbow 1/4'' 316 male female
Stainless steel nipple 1/4'' x 1/8'' 316
- złączka gwintowana nierdzewna
Stainless steel nipple 1/2'' x 1/4'' 316
- złączka gwintowana nierdzewna
Stainless elbow 1/4'' 316
Reduction 1/2''x1/4'' 316 nut-screw
- stal nierdzewna
Stainless ball valve 1/4" 316 40bar
- zawór nierdzewny
Plug 1/4'' BSP Stainless Steel 316
Cap 1/4'' stainless steel 316
- material: stainless steel 316
- certificate 3.1 at the request of the customer (free of charge)
Hose-end fitting 1/4'' x 8mm stainless steel
- stainless steel 316
Stainless steel nipple 3/4'' x 1/4'' 316
- złączka gwintowana nierdzewna
Reduction 1/4''x1/8'' 316 nut-screw
- stal nierdzewna
Stainless pipe nipple 1/4'' 40mm
Cap 1/4'' NPT A105 3000lbs
- material: carbon steel
- certificate 3.1 at the request of the customer (free of charge
- origin: European Union
Pipe nipple 1/4'' NPT 75mm A106
- material: A106 (P265GH K18 ST.45.8 1.0405)
- certificate 3.1
12,9 ÷ 13,1
Nipple 1/4'' NPT A350 LF2 cl.3000
- steel A350 LF2 (P355NL1 P355NH L360NB A420 1.0566 STE355)
- certificate 3.1 (free of charge)
Reduction 1/4'' BSP NPT FT MT
- redukcja stalowa
Nipple 1/4'' NPT cl. 3000 A105 fitting
Reduction 1/2''-1/4'' FT-MT NPT A105 cl.3000
- atest 3.1
- pochodzenie: Unia Europejska
Ball Valve 1/4" NPT 63 Bar Carbon Steel
- Suitable media: Water, oil, and gas (WOG)
- 3.1 material certificate available on request (free of charge)
Male Elbow 1/4" NPT Steel
Coupling 1/2''- 1'' socket weld 304 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Ball Valve 1" NPT Female Thread
Reduction 1'' NPT 316L cl.3000
- atest 3.1
- pochodzenie: Unia Europejska
Pipe nipple 1/4'' NPT 75mm A106
- material: A106 (P265GH K18 ST.45.8 1.0405)
- certificate 3.1
12,9 ÷ 13,1
Pipe nipple 1/4'' NPT 76mm A106
Square Head Plug 1/4" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Pipe nipple 1/4'' NPT 150mm A106
Reduction 1''x3/4'' NPT 304L hexagonal nut-screw
- stal nierdzewna 304L (1.4307)
Union 1'' NPT 304L cl.3000
- uszczelnienie: stożkowe (metal-metal)
- gatunek: 316L (1.4404)
- towar z atestem 3.1
Screw-in fitting 1/4'' NPT for pipe 8mm
Screw-in fitting 1/4'' NPT for pipe 6mm
- stainless steel
Coupling 1/4" BSP Class 3000 (206 bar) Stainless Steel 316L (1.4404)
- stainless steel
- high-pressure coupling
- 3.1 certificate
Check Valve 1/4" PN25 316 PTFE Socket Weld
Ball Valve 1" Stainless Steel 316 Socket Weld
- welding valve
Union 1/4'' NPT 316L cl.3000
- uszczelnienie: stożkowe (metal-metal)
- gatunek: 316L (1.4404)
- towar z atestem 3.1
Stainless tee 1" 316L
Stainless Steel Elbow 1" 316 45°
Stainless steel reduction nipple 2'' x 1'' 316
Stainless pipe 1'' 316L 100mm 33,4x3,38mm
Elbow 1/4" BSPT 316L Class 3000 Rc 90°
Socket Weld BSP Coupling 1" 316L Class 3000
Head 1'' 316L stainless steel
Threaded flange 1'' 316L NPT 150lbs B16.5
Cap 1'' NPT 304L cl. 3000
Pipe Nipple 1/4'' NPT 316L Stainless Steel 56mm
Hex Reducing Bushing 1'' × 1/4'' NPT 316L Class 3000
- Material: 316L stainless steel (1.4404)
Threaded Tee 1/4'' NPT 316L 206 bar
Square Head Plug 1/4'' NPT 316L Class 3000/6000
Plug 1 1/4'' NPT stainless 316L
Nipple 1/4'' NPT BSP stainless steel 316L
Ball Valve 1/4" NPT PN63 316 DN8
Threaded Tee 1'' NPT 316L 206 bar
Reducing Nipple 1/4" x 1/2" NPT 316L Class 3000
Hex Reducing Bushing 1 1/4'' × 1'' NPT 316L
- Material: 316L stainless steel (1.4404)
Ball Valve 1" NPT PN63 316 DN25
Pipe Nipple 1'' NPT 316L Stainless Steel 40mm
Pipe Nipple 1/4" NPT 316L Stainless Steel 30mm
Pipe Nipple 1" NPT 316L Stainless Steel 60mm
Adapter 1" NPT Male x BSP Female 316 Stainless Steel
Adapter 1 1/4" NPT Male x BSP Female 316 Stainless Steel
Adapter 1/4" NPT Male x BSP Female 316 Stainless Steel
Adapter 1/4" NPT Male x BSP Female 316L Stainless Steel Heavy Duty
Adapter 1/4" BSP Male x NPT Female 316L Stainless Steel Heavy Duty
Adapter 1" BSP Male x NPT Female 316L Stainless Steel Heavy Duty
Square Head Plug 2" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
THREADOLET 3/4''x3''-5'' NPT A105 cl.3000
- odgałęźnik stalowy do spawania
- atest 3.1
Pipe nipple 1'' NPT 150mm gat. A333
Coupling 2 1/2'' steel for welding
Reduction 2''x1 1/2'' NPT hexagonal nut-screw WZ
- stal A105 (P245GH P265GH P285GH)
- redukcja wysokociśnieniowa
- atest 3.1
Screw-in fitting 1/4'' NPT for pipe 10mm
Pipe nipple 1 1/2'' NPT 75mm A106
Reduction 1/8'' - 1/2'' BSP 316L cl.3000 MT FT adapter
Pipe nipple 1/2'' BSPT Rc 50mm A106
Pipe nipple 1/2'' BSPT Rc 76mm A106
Pipe nipple 1/2'' BSPT Rc 150mm A106
Pipe nipple 3/4'' BSPT Rc 76mm A106
Pipe nipple 1'' BSPT Rc 76mm A106
Pipe nipple 1'' BSPT Rc 100mm A106
Pipe nipple 1 1/4'' BSPT Rc 76mm A106
Pipe nipple 1 1/2'' BSPT Rc 80mm A106
Pipe nipple 2'' BSPT Rc 100mm A106
Coupling 2'' BSP 206bar 304L
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 2 1/2" BSPT Class 3000 ASTM A105
- boiler steel for welding
- BSPT tapered thread (per ISO 7Rc)
- for high pressure up to 206 bar
- 3.1 certificate
Screw-in fitting 1/2'' NPT for pipe 12mm
- material: stainless steel
Coupling 3/4" BSP Stainless Steel 1.4571 / 316Ti PN50
Stainless Steel Elbow 1'' 316 PN50 45°
Stainless Steel Elbow 1'' 316 Class 150 45°
Reducing Adapter 1/4'' NPT Male × BSP Female
- Steel Reducer
Nipple 2'' BSPT Rc 150 mm A106 Steel
Nipple 1 1/2'' NPT 75 mm A106 Steel
THREADOLET 3/4'' x 1''–36'' NPT A105 Class 3000
- Steel branch outlet for welding
- 3.1 material certificate available on request (free of charge)

