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Nominal Bore

Stainless Steel Nominal Bore Pipework – 304 & 316 Systems

Integraflow supplies complete nominal bore stainless steel pipework systems in 304 and 316/L grades, including pipe, fittings, flanges, valves, and supports in welded, seamless, threaded, and socket weld configurations, ideal for corrosive, and industrial environments across food, pharmaceutical, chemical, and mechanical sectors.

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Nominal Bore

DN20 X 10 (3/4" X 3/8" NB) NPT 150# REDUCING SOCKET SS 316
Side One Thread: 3/4" NPT Female
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 3/8" NPT Female
Suits an outside diameter (OD) of: 17.15mm
Material: Stainless
Grade: 316
£ 14.98 14.98 GBP
DN20 X 10 (3/4" X 3/8" NB) SW 150# REDUCING SOCKET SS 316
Side One Connection: 3/4" SW (Socket Weld)
Suits an outside diameter (OD) of: 26.9mm
Side Two Connection: 3/8" SW (Socket Weld)
Suits an outside diameter (OD) of: 17.15mm
Material: Stainless
Grade: 316
£ 14.28 14.28 GBP
DN20 X 15 (3/4" X 1/2" NB) BSP REDUCING HEX NIPPLE SS 316
Side 1 Thread: 3/4" NPT Male x Male
Suits an outside diameter (OD) of: 26.9mm
Side 2 Thread: 1/2" NPT Male x Male
Suits an outside diameter (OD) of: 21.3mm
Material: Forged Stainless Steel
Grade: 316

Standards:
BS3799, ANSI B16.11 MSS SP-83, MSS SP-95, MSS SP-97




Alternative terminology:
Reducing Heagon Nipple, Forged Stainless Steel, Stainless Steel, Threaded, Screwed, Fittings.
£ 61.32 61.32 GBP
DN20 X 15 (3/4" X 1/2" NB) BSP REDUCING HEX NIPPLE SS 316
Side 1 Thread: 3/4" BSPT Male x Male
Suits an outside diameter (OD) of: 26.9mm
Side 2 Thread: 1/2" BSPT Male x Male
Suits an outside diameter (OD) of: 21.3mm
Material: Forged Stainless Steel
Grade: 316

Standards:
BS3799, ANSI B16.11 MSS SP-83, MSS SP-95, MSS SP-97




Alternative terminology:
Reducing Heagon Nipple, Forged Stainless Steel, Stainless Steel, Threaded, Screwed, Fittings.
£ 63.91 63.91 GBP
DN20 X 15 (3/4" X 1/2" NB) BSP 150# REDUCING HEX BUSH SS 316
Side One Thread: 3/4" BSPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/2" BSPP Female
Suits an outside diameter (OD) of: 21.3mm
Material: Stainless
Grade: 316
£ 6.65 6.65 GBP
DN20 X 15 (3/4" X 1/2" NB) BSP 150# REDUCING HEX NIPPLE SS 316
Side One Thread: 3/4" BSPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/2" BSPT Male
Suits an outside diameter (OD) of: 21.3mm
Material: Stainless
Grade: 316
£ 6.79 6.79 GBP
DN20 X 15 (3/4" X 1/2" NB) BSP 150# REDUCING SOCKET SS 316
Side One Thread: 3/4" BSP Female
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/2" BSP Female
Suits an outside diameter (OD) of: 21.3mm
Material: Stainless
Grade: 316
£ 10.64 10.64 GBP
DN20 X 15 (3/4" X 1/2" NB) BSPT REDUCING BUSH SS 316
Side 1 threaded: 3/4" BSPT Male
Side 1 suits an outside diameter (OD) of: 26.9mm
Side 2 threaded: 1/2" BSPT Female
Side 2 suits suits an outside diameter (OD) of: 21.3mm

Material: Forged Stainless Steel
Grade: 316

Standards:
BS3799, ANSI B16.11 MSS SP-83, MSS SP-95, MSS SP-97

Alternative terminology:
Forged Stainless Steel,Stainless Steel, Reducing Bush, Threaded, Screwed, , Fittings.
£ 29.54 29.54 GBP
DN20 X 15 (3/4" X 1/2" NB) BSPT REDUCING SOCKET SS 316
Side 1 threaded: 3/4" BSPT Female
Side 1 suits an outside diameter (OD) of: 26.9mm

Side 2 threaded: 1/2" BSPT Female
Side 2 suits an outside diameter (OD) of: 21.3mm

Material: Forged Stainless steel
Grade: 316

Standards:
Nominal Bore, Threaded, Screwed, 3000 psi (3K) High Pressure, Forged Stainless steel, BS3799, ANSI B16.11 MSS SP-83, MSS SP-95, MSS SP-97




Alternative terminology:
Reducer, Socket, Coupling, Reducing Socket, Coupling, Stainless Steel
Contact us for pricing 0.0 GBP
DN20 X 15 (3/4" X 1/2" NB) NPT REDUCING BUSH SS 316
Side 1 threaded: 3/4" NPT Male
Side 1 suits an outside diameter (OD) of: 26.9mm
Side 2 threaded: 1/2" NPT Female
Side 2 suits suits an outside diameter (OD) of: 21.3mm

Material: Forged Stainless Steel
Grade: 316

Standards:
BS3799, ANSI B16.11 MSS SP-83, MSS SP-95, MSS SP-97

Alternative terminology:
Forged Stainless Steel,Stainless Steel, Reducing Bush, Threaded, Screwed, , Fittings.
£ 30.24 30.24 GBP
DN20 X 15 (3/4" X 1/2" NB) NPT REDUCING SOCKET SS 316
Side 1 threaded: 3/4" NPT Female
Side 1 suits an outside diameter (OD) of: 26.9mm

Side 2 threaded: 1/2" NPT Female
Side 2 suits an outside diameter (OD) of: 21.3mm

Material: Forged Stainless steel
Grade: 316

Standards:
Nominal Bore, Threaded, Screwed, 3000 psi (3K) High Pressure, Forged Stainless steel, BS3799, ANSI B16.11 MSS SP-83, MSS SP-95, MSS SP-97




Alternative terminology:
Reducer, Socket, Coupling, Reducing Socket, Coupling, Stainless Steel
Contact us for pricing 0.0 GBP
DN20 X 15 (3/4" X 1/2" NB) NPT 150# REDUCING HEX BUSH SS 316
Side One Thread: 3/4" NPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/2" NPT Female
Suits an outside diameter (OD) of: 21.3mm
Material: Stainless
Grade: 316
£ 9.73 9.73 GBP
DN20 X 15 (3/4" X 1/2" NB) NPT 150# REDUCING HEX NIPPLE SS 316
Side One Thread: 3/4" NPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/2" NPT Male
Suits an outside diameter (OD) of: 21.3mm
Material: Stainless
Grade: 316
£ 10.85 10.85 GBP
DN20 X 15 (3/4" X 1/2" NB) NPT 150# REDUCING SOCKET SS 316
Side One Thread: 3/4" NPT Female
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/2" NPT Female
Suits an outside diameter (OD) of: 21.3mm
Material: Stainless
Grade: 316
£ 15.68 15.68 GBP
DN20 X 15 (3/4" X 1/2" NB) SW 150# REDUCING SOCKET SS 316
Side One Connection: 3/4" SW (Socket Weld)
Suits an outside diameter (OD) of: 26.9mm
Side Two Connection: 1/2" SW (Socket Weld)
Suits an outside diameter (OD) of: 21.3mm
Material: Stainless
Grade: 316
£ 12.95 12.95 GBP
DN20 X 8 (3/4" X 1/4" NB) BSP 150# REDUCING HEX BUSH SS 316
Side One Thread: 3/4" BSPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/4" BSPP Female
Suits an outside diameter (OD) of: 13.72mm
Material: Stainless
Grade: 316
£ 6.65 6.65 GBP
DN20 X 8 (3/4" X 1/4" NB) BSP 150# REDUCING HEX NIPPLE SS 316
Side One Thread: 3/4" BSPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/4" BSPT Male
Suits an outside diameter (OD) of: 13.72mm
Material: Stainless
Grade: 316
£ 6.79 6.79 GBP
DN20 X 8 (3/4" X 1/4" NB) BSP 150# REDUCING SOCKET SS 316
Side One Thread: 3/4" BSP Female
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/4" BSP Female
Suits an outside diameter (OD) of: 13.72mm
Material: Stainless
Grade: 316
£ 10.64 10.64 GBP
DN20 X 8 (3/4" X 1/4" NB) NPT 150# REDUCING HEX BUSH SS 316
Side One Thread: 3/4" NPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/4" NPT Female
Suits an outside diameter (OD) of: 13.72mm
Material: Stainless
Grade: 316
£ 9.17 9.17 GBP
DN20 X 8 (3/4" X 1/4" NB) NPT 150# REDUCING HEX NIPPLE SS 316
Side One Thread: 3/4" NPT Male
Suits an outside diameter (OD) of: 26.9mm
Side Two Thread: 1/4" NPT Male
Suits an outside diameter (OD) of: 13.72mm
Material: Stainless
Grade: 316
£ 12.04 12.04 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
Contact us for pricing 0.0 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
Contact us for pricing 0.0 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
Contact us for pricing 0.0 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
Contact us for pricing 0.0 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
£ 11.90 11.9 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
£ 13.65 13.65 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
£ 17.57 17.57 GBP
DN20 X DN15 (¾" X ½" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 27 X 21mm
Wall Thickness: 2.87 X 2.77mm
Length: 38mm
£ 16.52 16.52 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 10S A403 SEAMLESS REDUCING TEE SS 304
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.11 x 2.11mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 10S
Weight: 0.11kg

Material: Stainless Steel
Material Grade: 304

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
Contact us for pricing 0.0 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 10S A403 SEAMLESS REDUCING TEE SS 316
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.11 x 2.11mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 10S
Weight: 0.11kg

Material: Stainless Steel
Material Grade: 316

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
Contact us for pricing 0.0 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 10S A403 WELDED REDUCING TEE SS 304
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.11 x 2.11mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 10S
Weight: 0.11kg

Material: Stainless Steel
Material Grade: 304

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
£ 24.92 24.92 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 10S A403 WELDED REDUCING TEE SS 316
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.11 x 2.11mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 10S
Weight: 0.11kg

Material: Stainless Steel
Material Grade: 316

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
£ 34.93 34.93 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 40S A403 SEAMLESS REDUCING TEE SS 304
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.87 x 2.77mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 40s
Weight: 0.27kg

Material: Stainless Steel
Material Grade: 304

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
Contact us for pricing 0.0 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 40S A403 SEAMLESS REDUCING TEE SS 316
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.87 x 2.77mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 40s
Weight: 0.27kg

Material: Stainless Steel
Material Grade: 316

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
Contact us for pricing 0.0 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 40S A403 WELDED REDUCING TEE SS 304
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.87 x 2.77mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 40s
Weight: 0.27kg

Material: Stainless Steel
Material Grade: 304

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
£ 28.07 28.07 GBP
DN20 x DN15 (3/4 x 1/2" NB) SCHEDULE 40S A403 WELDED REDUCING TEE SS 316
Outside Diameter (OD): 27 x 21mm
Wall Thickness (Run x Branch): 2.87 x 2.77mm
Centre to End (Run): 29mm
Centre to End (Branch): 29mm
Schedule: 40s
Weight: 0.27kg

Material: Stainless Steel
Material Grade: 316

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Tee, Reducing Tee, LR, Welding Tee, Weldable
£ 40.88 40.88 GBP
DN20x10 (3/4" x 3/8" NB) BSP 150# REDUCING TEE SS 316
Thread: 3/4" BSPP Female x Female, 3/8" BSPP Female Branch
Suits main run OD 26.7mm, branch OD 17.1mm

Material: Stainless
Grade: 316

Standards:
Nominal Bore, Threaded, Reducing Tee, Tee Piece, Screwed, Low Pressure, 150 psi
£ 14.35 14.35 GBP
DN20x15 (3/4" x 1/2" NB) BSP 150# REDUCING TEE SS 316
Thread: 3/4" BSPP Female x Female, 1/2" BSPP Female Branch
Suits main run OD 26.7mm, branch OD 21.3mm

Material: Stainless
Grade: 316

Standards:
Nominal Bore, Threaded, Reducing Tee, Tee Piece, Screwed, Low Pressure, 150 psi
£ 14.63 14.63 GBP
DN25 (1 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
Hub height (X): 53.8mm
Length through hub (A): 33.5mm
Bolt circle diameter (K): 88.9mm
Overall height (Y): 61.9mm
Raised face thickness (RF): 1.5mm
Bore (B): 50.8mm
Number of bolt holes: 4
Bolt hole diameter: 19.0mm
Approx. weight: 1.9kg
Contact us for pricing 0.0 GBP
DN25 (1 NB) SCHEDULE 10S ASA300 WELD NECK FLANGE SS 316
Outside diameter (O): 123.9mm
Flange thickness (C): 17.5mm
Hub height (X): 53.8mm
Length through hub (A): 33.5mm
Bolt circle diameter (K): 88.9mm
Overall height (Y): 61.9mm
Raised face thickness (RF): 1.5mm
Bore (B): 50.8mm
Number of bolt holes: 4
Bolt hole diameter: 19.0mm
Approx. weight: 1.9kg
£ 148.47 148.47 GBP