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Product of the Day
€0.29
€0.24
€87.99
€71.54
€3.90
€3.17
€1.28
€1.04
Coupling 3" BSP Carbon Steel for Welding
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Regular price:
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Description
Coupling 3" BSP Carbon Steel for Welding
- Size: 3" (thread diameter: 84.9–85.3 mm)
- Thread type: BSP (parallel pipe thread, G, Rp)
- Material: Carbon steel
- Suitable for welding
- Applications: Central heating installations, industrial piping systems, agricultural machinery
Alternative Name
Coupling 3" BSP Carbon Steel for Welding, Female BSP Coupling, Steel Threaded Coupling, Carbon Steel Coupling, BSP Female Socket, G Thread Coupling, Rp Female Coupling, Weldable Steel Coupling
Information
The 3" BSP coupling is manufactured from carbon steel and is designed for threaded pipe connections in heating, industrial, and agricultural applications. It features female BSP threads and offers excellent weldability, making it suitable for welded piping systems and fabricated steel structures.
Material
The coupling is manufactured from carbon steel, providing good mechanical strength, excellent weldability, and reliable performance in industrial installations.
Advantages
- Female BSP thread
- Excellent weldability
- Durable carbon steel construction
- Suitable for welded piping systems
- Reliable threaded connection
- Ideal for industrial applications
Applications
Suitable for:
- Central heating installations
- Industrial piping systems
- Agricultural machinery
- General engineering
- Steel fabrications
- Hydraulic systems
Other Available Couplings
We also offer:
- Full bore high-pressure couplings
- High-pressure reducing couplings
Available thread types:
- BSP (parallel)
- BSPT (tapered)
- NPT (American tapered)
Available materials:
- Carbon steel ASTM A105
- Low-temperature carbon steel ASTM A350 LF2 CL.1
- Stainless steel 304
- Stainless steel 316
- Stainless steel F304L
- Stainless steel F316L
- Stainless steel F321
Available pressure classes:
- Class 3000
- Class 6000
- 200 bar
- 400 bar
We also offer this product in other sizes. If you have any questions, please contact us. Call +48 63 261 42 02 or email biuro@polberis.pl.
Learn more about our threaded couplings here >>

Technical data
| Coupling Type | Coupling |
| Material | Carbon Steel |
| Pressure | Pressure Range < 20 bar |
| Connection 1 | 3'' |
| Thread Type – Connection 1 | BSP / G / Rp / Rc Thread |
| Connection 2 | 3'' |
| Thread Type – Connection 2 | BSP / G / Rp / Rc Thread |
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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 1 1/2'' x 1'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/2'' x 1 1/4'' stainless steel 316 BSP
- material: stainless steel 316
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 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1 1/4'' BSP 206bar 304L
- high pressure coupling
- certificate 3.1
- orgin: European Union
Coupling 3/4''-1 1/2'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1'' - 1/2'' socket weld A350 LF2 cl.3000
Coupling 1''-3/4'' socket welt A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1 1/4" socket weld 316L cl.3000
- coupling for welding
- atest 3.1
- origin: European Union
Reduction coupling 3/4" - 1'' socket weld 316L cl. 3000
Coupling 1''x1 1/4'' socket weld 316L cl. 3000
Coupling 3/8''-3/4'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 3/8''-1/2'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Stainless reduction connector 1/2'' - 1/4'' 304
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
Reducing Coupling 2 1/2" × 2" Galvanized Malleable Iron
Reducing Coupling 4" × 2" Galvanized Malleable Iron
Reducing Coupling 4" × 2 1/2" Galvanized Malleable Iron
Reducing Coupling 4" × 3" Galvanized Malleable Iron
Coupling 1/2'' BSP A350 LF2 cl.3000
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 1/4'' 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'' x 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1'' x 3/4'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' 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 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 2 1/2'' x 1 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3'' x 2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 3'' x 2 1/2'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 4'' x 3'' stainless steel 316 BSP
- material: stainless steel 316
Coupling 1 1/4'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 1" NPT Class 6000 (413 bar) Stainless Steel 316L (1.4404)
- pressure class: 6,000 lbs (i.e., 413 bar)
- 3.1 certification
- origin: European Union
Reducing coupling 3/4''- 1'' BSP steel
- steel coupling
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
Steel reduction coupling 1/4''x1/2'' NPT
Reduction 9/16'' UNF - G 1/4'' BSP
Steel plug 1 1/4'' 60 degree seal
- Steel Plug
- Thread Type: BSP (i.e., standard Polish, also known as cylindrical straight, pipe, Rp, G)
Steel hose-end fitting 13mm 3/8''
Tee 3/4'' BSP Class 3000 A105
- Grade: welding steel A105 (P245GH, P280GH)
- High-pressure tee
- Certificate 3.1
Ball valve 1'' brass for water male-female
Ball Valve 1-1/2" Brass Male × Female 25 Bar
Cast iron plug 2 1/2''
- korek z kwadratem na klucz
- model: T9 / nr 46 / nr 290
Cast iron plug 3''
- korek z kwadratem na klucz
- model: T9 / nr 46 / nr 290
Extension 1 1/4''x 1'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 2''x1 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Extension 1 1/2'' galvanized cast iron reduction
- żeliwo ocynkowane
Reduction 1''-1/2'' NPT hexagonal nut-screw WZ
Male Elbow 3/4" NPT Steel
Angle union 1 1/2'' 90 degrees 316
Stainless nipple union 1 1/4" BSP
Stainless nipple union 2 1/2" BSP
Stainless nipple union 4" BSP
Elbow 1 1/2" NPT A105 90° Class 3000
Steel tee 3/8” male fitting
- material: steel
Coupling 2'' steel for welding
Coupling 1/4'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Coupling 1/2'' x 1'' NPT 316L cl.3000
- High-Pressure coupling
- Certificate 3.1
Coupling 1/2'' x 1'' BSP cl.3000 A105 steel
- gwint standardowy polski BSP (inna nazwa G, Rp, walcowy prosty)
- atest 3.1
- pochodzenie: Unia Europejska
Coupling 2''- 3'' socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Coupling 1 1/4'' steel for welding
Coupling 3/4" socket weld 316L cl.3000
- mufa do spawania
- atest 3.1
- pochodzenie: Unia Europejska
Reducing Coupling 1/2" × 1/4" BSP Class 3000 ASTM A105
-
Polish standard thread (BSP)
Coupling 2 1/2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Reduction coupling 1/2'' x 3/4'' NPT cl.3000 A105
Coupling 1/2'' BSP stainless steel 316
Reduction coupling 2'' x 1'' NPT 3000 A105
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
Coupling 2'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Coupling 1'' NPT 321 cl.3000
- mufa wysokociśnieniowa (206bar)
- atest 3.1
Stainless union 3'' BSP
- material: stainless steel 316
Cap 3'' NPT A105 3000lbs
- material: carbon steel
- certificate 3.1 at the request of the customer (free of charge
- origin: European Union
Angle union 3'' galvanized cast iron F-M
- żeliwo ocynkowane
Stainless steel reduction nipple 3'' x 2'' 316
Nipple stainless elbow 3'' 316 male female
Cross 3'' galvanized cast iron
Elbow 3" NPT A105 90° Class 3000
Elbow 3'' BSP A105 90 deg. cl.3000
- kolano wysokociśnieniowe gwintowane
- atest 3.1
- pochodzenie: Unia Europejska
84,9 ÷ 85,3
Tee 3'' socket weld A105 cl.3000
- tee for welding
- size: 3''
- certificate 3.1
Elbow 3" socket weld A105 cl.3000 90 degrees
Coupling 5'' steel for welding
Steel Coupling 1/4" BSP Weldable
Nipple ball valve 3''
Coupling 3" NPT Class 3000 Stainless Steel 304L (1.4301)
- stainless steel coupling
- for high pressure: 206 bar
- 3.1 certification
- origin: European Union
Half coupling 1'' for welding
Half coupling 1/2'' for welding
Half coupling 2'' for welding
Reduction WELDOLET XS 2'' x 3'' - 4'' BW A105
Elbow 3" socket weld A105 cl.3000 45 degrees
- łącznik do spawania rur
- atest 3.1
Butt weld elbow 88,9x3,2mm 5D P265GH
Nipple 3'' galvanized cast iron
SOCKOLET 3/4'' x 3''-5'' SW A105 kl.3000 OUTLET
SOCKOLET 1'' x 3''-3 1/2'' SW A105 cl.3000 OUTLET
Pipe nipple 3'' NPT 100mm A106
Pipe 3" A106 carbon steel 45mm
Nipple 3'' NPT cl. 3000 A105 fitting
Steel Pipe 3" 88.9 × 10 mm P355 100 cm
Cast Iron Plug 3'' T8 Without Collar
Coupling 1 1/2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1/8'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1 1/2'' BSP stainless steel 316
Coupling 1 1/2" socket weld A105 cl.3000
Coupling 1" NPT Stainless Steel AISI 316
Coupling 1'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1" socket weld A105 cl.3000
Coupling 3/8'' steel for welding
Coupling 1/2'' 316L NPT cl.3000
- certificate 3.1
- orgin: European Union
Coupling 1/2'' NPT 1.4571 316Ti
Coupling 1/2'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1/2" socket weld A105 cl.3000
- mufa do spawania
- łącznik do spawania rur
- atest 3.1
Hex coupling 1/2" steel
- thread type BSP, that is standard Polish thread, otherwise known as cylindrical, straight, Rp, G
- high pressure coupling
Coupling 1/4'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Hex coupling 1/4" steel
- thread type BSP, that is standard Polish thread, otherwise known as cylindrical, straight, Rp, G
- high pressure coupling
Coupling 1/8'' NPT 304L cl.3000
- high-pressure coupling
- certificate 3.1 (free of charge)
- origin: European Union
Hex coupling M14x1,5 steel
- thread type: metric
- high pressure coupling
Hex coupling M16x1,5 steel
- thread type: metric
- high pressure coupling
Hex coupling M18x1,5 steel
- thread type: metric
- high pressure coupling
Hex coupling M22x1,5 steel
- thread type: metric
- high pressure coupling
Hex coupling 3/4" steel
- thread type BSP, that is standard Polish thread, otherwise known as cylindrical, straight, Rp, G
- high pressure coupling
Reduction coupling 1'' x 1 1/2'' NPT 3000 A105
Reducing Coupling 1/2" × 3/8" Galvanized Malleable Iron
Reducing Coupling 3/4''x1/2'' Galvanized Cast Iron
Coupling 1 1/2'' steel for welding
Coupling 1'' steel for welding
Coupling 1/4'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 1/8'' steel for welding
Coupling 2 1/2'' BSP A105 cl.3000
- high pressure coupling
- certificate 3.1
Coupling 3/4'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 3/8'' NPT A105 cl.3000
- steel for welding
- certificate 3.1 (free of charge)
- origin: European Union
Coupling 3/8'' NPT 316Ti
Hex coupling 3/8" steel
- thread type BSP, that is standard Polish thread, otherwise known as cylindrical, straight, Rp, G
- high pressure coupling
Coupling 3/4" x 3/8" galvanized cast iron
Teflon tape 10mx12mmx0,075m
Hex plug 3/4" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Cap 1/2'' NPT 304L cl.3000
- hexagonal stainless steel cap
- atest 3.1
Plug 3/4'' BSP A105 Class 3000
Hex plug 3/8" NPT A105 cl.3000
Steel plug 1'' 60 degree seal
- Steel Plug
- Thread Type: BSP (i.e., standard Polish, also known as cylindrical straight, pipe, Rp, G)
Hex plug 1 1/2" NPT A105 cl.3000
- high-pressure plug
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
Steel plug 1/2'' 60 degree seal
- Steel Plug
- Thread Type: BSP (i.e., standard Polish, also known as cylindrical straight, pipe, Rp, G)
Hex plug 1/4" NPT A105 cl.3000
Steel reduction nipple 1'' - M33x2
- złączka wysokociśnieniowa
- nypel stalowy
Steel reduction nipple 1/4'' x 1/8''
Steel nipple 1 1/2'' BSPT
Steel reduction 5/8'' - 1/2'' screw-on
Plug 1/4'' BSP 316L Stainless Steel
- High-pressure plug
- 3.1 material certificate available on request (free of charge)
Coupling 2 1/2'' steel for welding
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
Pipe nipple 1'' NPT 150mm gat. A333
Reduction 2''x1 1/2'' NPT hexagonal nut-screw WZ
- stal A105 (P245GH P265GH P285GH)
- redukcja wysokociśnieniowa
- atest 3.1
THREADOLET 3/4''x3''-5'' NPT A105 cl.3000
- odgałęźnik stalowy do spawania
- atest 3.1
Coupling 2" socket weld A105 cl.3000
Elbow 1/2'' NPT 304L cl.3000 206bar
- certificate 3.1 at the request of the customer (free of charge)
- origin: European Union
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
Coupling 3/4" BSP Stainless Steel 1.4571 / 316Ti PN50
Ball valve 1'' for water male-female
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)


