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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

DN25 X 20 (1" X 3/4" NB) BSP 150# REDUCING HEX BUSH SS 316
Side One Thread: 1" BSPT Male
Suits an outside diameter (OD) of: 33.4mm
Side Two Thread: 3/4" BSPP Female
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 9.17 9.17 GBP
DN25 X 20 (1" X 3/4" NB) BSP 150# REDUCING HEX NIPPLE SS 316
Side One Thread: 1" BSPT Male
Suits an outside diameter (OD) of: 33.4mm
Side Two Thread: 3/4" BSPT Male
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 11.97 11.97 GBP
DN25 X 20 (1" X 3/4" NB) BSP 150# REDUCING SOCKET SS 316
Side One Thread: 1" BSP Female
Suits an outside diameter (OD) of: 33.4mm
Side Two Thread: 3/4" BSP Female
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 19.95 19.95 GBP
DN25 X 20 (1" X 3/4" NB) BSP 150# REDUCING TEE SS 316
Run Thread: 1" BSP Female x Female
Branch Thread: 3/4" BSP Female
Suits an outside diameter (OD) of: 33.4mm
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 23.17 23.17 GBP
DN25 X 20 (1" X 3/4" NB) BSPT REDUCING BUSH SS 316
Side 1 threaded: 1" BSPT Male
Side 1 suits an outside diameter (OD) of: 33.4mm
Side 2 threaded: 3/4" BSPT Female
Side 2 suits suits an outside diameter (OD) of: 26.9mm

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.
£ 47.95 47.95 GBP
DN25 X 20 (1" X 3/4" NB) BSPT REDUCING SOCKET SS 316
Side 1 threaded: 1" BSPT Female
Side 1 suits an outside diameter (OD) of: 33.4mm

Side 2 threaded: 3/4" BSPT Female
Side 2 suits an outside diameter (OD) of: 26.9mm

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
DN25 X 20 (1" X 3/4" NB) NPT REDUCING BUSH SS 316
Side 1 threaded: 1" NPT Male
Side 1 suits an outside diameter (OD) of: 33.4mm
Side 2 threaded: 3/4" NPT Female
Side 2 suits suits an outside diameter (OD) of: 26.9mm

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.
£ 46.13 46.13 GBP
DN25 X 20 (1" X 3/4" NB) NPT REDUCING SOCKET SS 316
Side 1 threaded: 1" NPT Female
Side 1 suits an outside diameter (OD) of: 33.4mm

Side 2 threaded: 3/4" NPT Female
Side 2 suits an outside diameter (OD) of: 26.9mm

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
DN25 X 20 (1" X 3/4" NB) NPT 150# REDUCING HEX BUSH SS 316
Side One Thread: 1" NPT Male
Suits an outside diameter (OD) of: 33.4mm
Side Two Thread: 3/4" NPT Female
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 15.26 15.26 GBP
DN25 X 20 (1" X 3/4" NB) NPT 150# REDUCING HEX NIPPLE SS 316
Side One Thread: 1" NPT Male
Suits an outside diameter (OD) of: 33.4mm
Side Two Thread: 3/4" NPT Male
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 16.80 16.8 GBP
DN25 X 20 (1" X 3/4" NB) NPT 150# REDUCING SOCKET SS 316
Side One Thread: 1" NPT Female
Suits an outside diameter (OD) of: 33.4mm
Side Two Thread: 3/4" NPT Female
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 23.38 23.38 GBP
DN25 X 20 (1" X 3/4" NB) SW 150# REDUCING SOCKET SS 316
Side One Connection: 1" SW (Socket Weld)
Suits an outside diameter (OD) of: 33.4mm
Side Two Connection: 3/4" SW (Socket Weld)
Suits an outside diameter (OD) of: 26.9mm
Material: Stainless
Grade: 316
£ 20.23 20.23 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
£ 16.52 16.52 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
£ 15.47 15.47 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
£ 27.72 27.72 GBP
DN25 X DN15 (1" X ½" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 21mm
Wall Thickness: 3.38 X 2.77mm
Length: 51mm
£ 24.01 24.01 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
Contact us for pricing 0.0 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
£ 10.99 10.99 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
£ 15.89 15.89 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
£ 21.98 21.98 GBP
DN25 X DN20 (1" X ¾" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 33 X 27mm
Wall Thickness: 3.38 X 2.87mm
Length: 51mm
£ 27.58 27.58 GBP
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 10S A403 SEAMLESS REDUCING TEE SS 304
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 2.77 x 2.11mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 10S
Weight: 0.19kg

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
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 10S A403 SEAMLESS REDUCING TEE SS 316
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 2.77 x 2.11mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 10S
Weight: 0.19kg

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
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 10S A403 WELDED REDUCING TEE SS 304
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 2.77 x 2.11mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 10S
Weight: 0.19kg

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
£ 36.68 36.68 GBP
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 10S A403 WELDED REDUCING TEE SS 316
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 2.77 x 2.11mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 10S
Weight: 0.19kg

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
£ 57.96 57.96 GBP
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 40S A403 SEAMLESS REDUCING TEE SS 304
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 3.38 x 2.87mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 40s
Weight: 0.34kg

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
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 40S A403 SEAMLESS REDUCING TEE SS 316
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 3.38 x 2.87mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 40s
Weight: 0.34kg

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
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 40S A403 WELDED REDUCING TEE SS 304
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 3.38 x 2.87mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 40s
Weight: 0.34kg

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
£ 28.84 28.84 GBP
DN25 x DN20 (1 x 3/4" NB) SCHEDULE 40S A403 WELDED REDUCING TEE SS 316
Outside Diameter (OD): 33 x 27mm
Wall Thickness (Run x Branch): 3.38 x 2.87mm
Centre to End (Run): 38mm
Centre to End (Branch): 38mm
Schedule: 40s
Weight: 0.34kg

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
£ 51.38 51.38 GBP
DN25x15 (1" x 1/2" NB) BSP 150# REDUCING TEE SS 316
Thread: 1" BSPP Female x Female, 1/2" BSPP Female Branch
Suits main run OD 33.4mm, 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
DN25x20 (1" x 3/4" NB) BSP 150# REDUCING TEE SS 316
Thread: 1" BSPP Female x Female, 3/4" BSPP Female Branch
Suits main run OD 33.4mm, branch OD 26.7mm

Material: Stainless
Grade: 316

Standards:
Nominal Bore, Threaded, Reducing Tee, Tee Piece, Screwed, Low Pressure, 150 psi
£ 23.17 23.17 GBP
DN32 (1 1/4" NB) PN10/PN16/PN25/PN40 RF BSPP THREADED FLANGE SS 304
Flange outside diameter: 140mm (D)
Flange thickness: 18mm (C2)
Pitch Circle Diameter (PCD): 100mm (K)
Flange hub height: 30mm (H1)
Raised Face Height: 2mm (f1)
BSPP Thread: 1 1/4"
Bolt Holes: 4 off M16 bolts
Material: Stainless Steel
Grade: 304

Standards: EN 1092-1
Pressure Rating: PN16
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Threaded Flange, Screwed Flange, BSPP, Stainless Steel, SS Steel, Bossed, PN16
Contact us for pricing 0.0 GBP
DN32 (1 1/4" NB) PN10/PN16/PN25/PN40 RF BSPP THREADED FLANGE SS 316
Flange outside diameter: 140mm (D)
Flange thickness: 18mm (C2)
Pitch Circle Diameter (PCD): 100mm (K)
Flange hub height: 30mm (H1)
Raised Face Height: 2mm (f1)
BSPP Thread: 1 1/4"
Bolt Holes: 4 off M16 bolts
Material: Stainless Steel
Grade: 316

Standards: EN 1092-1
Pressure Rating: PN16
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Threaded Flange, Screwed Flange, BSPP, Stainless Steel, SS Steel, Bossed, PN16
Contact us for pricing 0.0 GBP