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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

DN80 X DN50 (3" X 2" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 60mm
Wall Thickness: 5.49 X 3.91mm
Length: 89mm
Contact us for pricing 0.0 GBP
DN80 X DN50 (3" X 2" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 89 X 60mm
Wall Thickness: 5.49 X 3.91mm
Length: 89mm
Contact us for pricing 0.0 GBP
DN80 X DN50 (3" X 2" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 60mm
Wall Thickness: 5.49 X 3.91mm
Length: 89mm
Contact us for pricing 0.0 GBP
DN80 X DN50 (3" X 2" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 89 X 60mm
Wall Thickness: 5.49 X 3.91mm
Length: 89mm
£ 54.11 54.11 GBP
DN80 X DN50 (3" X 2" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 60mm
Wall Thickness: 5.49 X 3.91mm
Length: 89mm
£ 101.99 101.99 GBP
DN80 X DN50 (3" X 2" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 89 X 60mm
Wall Thickness: 5.49 X 3.91mm
Length: 89mm
£ 70.63 70.63 GBP
DN80 X DN50 (3" X 2" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 60mm
Wall Thickness: 5.49 X 3.91mm
Length: 89mm
£ 104.23 104.23 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
Contact us for pricing 0.0 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 SEAMLESS CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
Contact us for pricing 0.0 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
Contact us for pricing 0.0 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 SEAMLESS ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
Contact us for pricing 0.0 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 304
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
£ 53.62 53.62 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 WELDED CONCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
£ 76.02 76.02 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 304
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
£ 82.81 82.81 GBP
DN80 X DN65 (3" X 2½" NB) SCHEDULE 40S A403 WELDED ECCENTRIC REDUCER SS 316
Outside Diameter (OD): 89 X 73mm
Wall Thickness: 5.49 X 5.16mm
Length: 89mm
£ 94.08 94.08 GBP
DN80 x DN50 (3 x 2" NB) SCHEDULE 10S A403 SEAMLESS REDUCING TEE SS 304
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 3.05 x 2.77mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 10S
Weight: 1.23kg

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
DN80 x DN50 (3 x 2" NB) SCHEDULE 10S A403 SEAMLESS REDUCING TEE SS 316
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 3.05 x 2.77mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 10S
Weight: 1.23kg

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
DN80 x DN50 (3 x 2" NB) SCHEDULE 10S A403 WELDED REDUCING TEE SS 304
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 3.05 x 2.77mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 10S
Weight: 1.23kg

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
£ 124.32 124.32 GBP
DN80 x DN50 (3 x 2" NB) SCHEDULE 10S A403 WELDED REDUCING TEE SS 316
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 3.05 x 2.77mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 10S
Weight: 1.23kg

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
£ 124.81 124.81 GBP
DN80 x DN50 (3 x 2" NB) SCHEDULE 40S A403 SEAMLESS REDUCING TEE SS 304
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 5.49 x 3.91mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 40s
Weight: 3.75kg

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
DN80 x DN50 (3 x 2" NB) SCHEDULE 40S A403 SEAMLESS REDUCING TEE SS 316
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 5.49 x 3.91mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 40s
Weight: 3.75kg

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
DN80 x DN50 (3 x 2" NB) SCHEDULE 40S A403 WELDED REDUCING TEE SS 304
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 5.49 x 3.91mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 40s
Weight: 3.75kg

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
£ 141.40 141.4 GBP
DN80 x DN50 (3 x 2" NB) SCHEDULE 40S A403 WELDED REDUCING TEE SS 316
Outside Diameter (OD): 89 x 60mm
Wall Thickness (Run x Branch): 5.49 x 3.91mm
Centre to End (Run): 86mm
Centre to End (Branch): 76mm
Schedule: 40s
Weight: 3.75kg

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
£ 202.44 202.44 GBP
100 X 100 X 3MM STAINLESS STEEL BOX SECTION DULL POLISHED GR. 304
80 x 80mm Stainless Steel Box Section
Wall Thickness: 3mm
Material: Stainless Steel
Grade: 304
Finish: Dull Polished (180 Grit Minimum)
Standard Length: 6 meter Random
Weight Per Meter: 6.97kg
Construction: Seamless
Certification Available: 3.1 BS EN 10204 Material Certification

Note: Sold online only in 1 meter increments. Please get in touch for specific cutting requirements.
Contact us for pricing 0.0 GBP
DN10 (3/8" NB) SW 3000# UNION SS 316
Connection: 3/8" SW (Socket Weld)
Suits an outside diameter (OD) of: 17.15mm
Material: Forged Stainless Steel
Grade: 316
Construction: Forged Stainless Steel
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Union, FXF, Stainless Steel
£ 82.39 82.39 GBP
DN100 (4 NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
Hub height (X): 146.0mm
Length through hub (A): 114.3mm
Bolt circle diameter (K): 203.2mm
Overall height (Y): 85.8mm
Raised face thickness (RF): 1.5mm
Bore (B): 157.2mm
Number of bolt holes: 8
Bolt hole diameter: 22.3mm
Approx. weight: 11.9kg

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA150 FLANGED 2PC LEVER OP. BALL VALVE LEVER OP SS 316
Flanged both ends: 4" ASA 150
Suits an outside diameter (OD) of: 114.3mm
PCD: 190.5mm Ø (ANSI 150)
Face to face: 229mm
Construction: 2 Piece
Body Material: CF8/CF8M (316) Stainless
Bore: Full Bore
Internals: PTFE Seals
Investment Casting
Blowout proof stem

Part of our Isolation and Valves Range

Part of our Flanges and Flanged Connections Range
£ 2,740.01 2740.01 GBP
DN100 (4" NB) ASA150 RF BLIND FLANGE SS 304
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
Pitch circle diameter (K): 190.5mm
Raised face height (RF): 1.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: Stainless Steel 304
Rating: ASA 150
Type: Blind flange (ASME B16.5)

Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Blind Flange, Blank, ASA150, Stainless Steel, Raised Faced

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA150 RF BLIND FLANGE SS 316
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
Pitch circle diameter (K): 190.5mm
Raised face height (RF): 1.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: Stainless Steel 316
Rating: ASA 150
Type: Blind flange (ASME B16.5)

Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Blind Flange, Blank, ASA150, Stainless Steel, Raised Faced

Part of our Flanges and Flanged Connections Range
£ 366.73 366.73 GBP
DN100 (4" NB) ASA150 RF BOSSED SLIP ON FLANGE SS 304
Flange outside diameter: 228.6mm (O)
Flange thickness: 23.8mm (C)
Flange hub height: 33.2mm (Y)
Pitch Circle Diameter (PCD): 190.5mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 8 off 19.0mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 304
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 150LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA150 RF BOSSED SLIP ON FLANGE SS 316
Flange outside diameter: 228.6mm (O)
Flange thickness: 23.8mm (C)
Flange hub height: 33.2mm (Y)
Pitch Circle Diameter (PCD): 190.5mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 8 off 19.0mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 316
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 150LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA1500 RF BOSSED SLIP ON FLANGE SS 304
Flange outside diameter: 311.1mm (O)
Flange thickness: 53.8mm (C)
Flange hub height: 63.5mm (Y)
Pitch Circle Diameter (PCD): 241.3mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 8 off 35.0mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 304
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 1500LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA1500 RF BOSSED SLIP ON FLANGE SS 316
Flange outside diameter: 311.1mm (O)
Flange thickness: 53.8mm (C)
Flange hub height: 63.5mm (Y)
Pitch Circle Diameter (PCD): 241.3mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 8 off 35.0mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 316
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 1500LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA300 RF BLIND FLANGE SS 304
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
Pitch circle diameter (K): 200.1mm
Raised face height (RF): 1.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: Stainless Steel 304
Rating: ASA 300
Type: Blind flange (ASME B16.5)

Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Blind Flange, Blank, ASA300, Stainless Steel, Raised Faced

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA300 RF BLIND FLANGE SS 316
Outside diameter (O): 254.0mm
Flange thickness (C): 31.7mm
Pitch circle diameter (K): 200.1mm
Raised face height (RF): 1.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: Stainless Steel 316
Rating: ASA 300
Type: Blind flange (ASME B16.5)

Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Blind Flange, Blank, ASA300, Stainless Steel, Raised Faced

Part of our Flanges and Flanged Connections Range
£ 722.68 722.68 GBP
DN100 (4" NB) ASA300 RF BOSSED SLIP ON FLANGE SS 304
Flange outside diameter: 254.0mm (O)
Flange thickness: 31.7mm (C)
Flange hub height: 47.7mm (Y)
Pitch Circle Diameter (PCD): 200.1mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 8 off 22.3mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 304
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 300LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA300 RF BOSSED SLIP ON FLANGE SS 316
Flange outside diameter: 254.0mm (O)
Flange thickness: 31.7mm (C)
Flange hub height: 47.7mm (Y)
Pitch Circle Diameter (PCD): 200.1mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 8 off 22.3mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 316
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 300LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA600 RF BOSSED SLIP ON FLANGE SS 304
Flange outside diameter: 273.0mm (O)
Flange thickness: 38.1mm (C)
Flange hub height: 53.8mm (Y)
Pitch Circle Diameter (PCD): 215.9mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 8 off 25.4mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 304
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 600LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) ASA600 RF BOSSED SLIP ON FLANGE SS 316
Flange outside diameter: 273.0mm (O)
Flange thickness: 38.1mm (C)
Flange hub height: 53.8mm (Y)
Pitch Circle Diameter (PCD): 215.9mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 8 off 25.4mm diameter
Bore Diameter: 116.0mm (B)
Material: Stainless Steel
Grade: 316
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Raised Faced, ASA 600LB, SOB

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) BSP 150# (FXF) CONE SEAT UNION SS 316
Thread: 4" BSPP Female x Female
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless
Grade: 316
£ 279.30 279.3 GBP