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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

DN100 (4" NB) SCHEDULE 40S A403 WELDED LONG RADIUS 90 DEG ELBOW SS 304
Outside Diameter (OD): 114.3mm
Wall Thickness: 6.02mm
Centre to Face: 152.4mm
Schedule: A403 Welded
Weight: 4.2kg

Material: Stainless Steel
Material Grade: 304

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Elbow, Long Radius, 90°, LR, Bend, Weldable
£ 164.85 164.85 GBP
DN100 (4" NB) SCHEDULE 40S A403 WELDED LONG RADIUS 90 DEG ELBOW SS 316
Outside Diameter (OD): 114.3mm
Wall Thickness: 6.02mm
Centre to Face: 152.4mm
Schedule: A403 Welded
Weight: 4.2kg

Material: Stainless Steel
Material Grade: 316

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Elbow, Long Radius, 90°, LR, Bend, Weldable
£ 263.90 263.9 GBP
DN100 (4" NB) SCHEDULE 40S A403 WELDED SHORT RADIUS 90 DEG ELBOW SS 304
Outside Diameter (OD): 114.3mm
Wall Thickness: 6.02mm
Centre to Face: 101.6mm
Schedule: A403 Welded
Weight: 2.62kg

Material: Stainless Steel
Material Grade: 304

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Elbow, Short Radius, 90°, SR, Bend, Weldable
£ 131.60 131.6 GBP
DN100 (4" NB) SCHEDULE 40S A403 WELDED SHORT RADIUS 90 DEG ELBOW SS 316
Outside Diameter (OD): 114.3mm
Wall Thickness: 6.02mm
Centre to Face: 101.6mm
Schedule: A403 Welded
Weight: 2.62kg

Material: Stainless Steel
Material Grade: 316

Certification Available: 3.1 BS EN 10204 Material Certification

Alternative Terminology: Buttweld Elbow, Short Radius, 90°, SR, Bend, Weldable
£ 185.15 185.15 GBP
DN100 (4" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
Hub length (X): 114.3mm
Neck height (A): 105.0mm
Pitch circle diameter (K): 190.5mm
Hub base diameter (Y): 76.2mm
Raised face height (RF): 15.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: 304 Stainless Steel
Rating: ASA 150
Type: Weld Neck Flange (ASME B16.5)

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

Alternative terminology:
WN Flange, Welding Neck, ASA150, Stainless Steel, RF

Part of our Flanges and Flanged Connections Range
£ 368.69 368.69 GBP
DN100 (4" NB) SCHEDULE 40S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
Hub length (X): 114.3mm
Neck height (A): 105.0mm
Pitch circle diameter (K): 190.5mm
Hub base diameter (Y): 76.2mm
Raised face height (RF): 15.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: 316 Stainless Steel
Rating: ASA 150
Type: Weld Neck Flange (ASME B16.5)

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

Alternative terminology:
WN Flange, Welding Neck, ASA150, Stainless Steel, RF

Part of our Flanges and Flanged Connections Range
£ 677.74 677.74 GBP
DN100 (4" NB) SCHEDULE 40S 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) SCHEDULE 40S ASA300 WELD NECK FLANGE SS 316
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
£ 847.63 847.63 GBP
DN100 (4" NB) SCHEDULE 40s STAINLESS SEAMLESS PIPE 304
Outside Diameter (OD): 114.3mm
Wall Thickness (WT): 6.02mm (Sch40)
Material: Stainless
Grade: 304
Standards: ASTM A312
Standard Length: 6 meters
Weight Per Meter: 16.32
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.



Part of our Stainless Pipes and Tubes Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) SCHEDULE 40s STAINLESS SEAMLESS PIPE 316
Outside Diameter (OD): 114.3mm
Wall Thickness (WT): 6.02mm
Material: Stainless
Grade: 316
Standards: ASTM A312
Standard Length: 6 meter Random
Weight Per Meter: 16.32kg
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.

Part of our Stainless Pipes and Tubes Range
£ 1,269.03 1269.03 GBP
DN100 (4" NB) SCHEDULE 40s STAINLESS WELDED PIPE 304
Outside Diameter (OD): 114.3mm
Wall Thickness (WT): 6.02mm (Sch40)
Material: Stainless
Grade: 304
Standards: ASTM A312
Standard Length: 6 meter Random
Weight Per Meter: 16.07kg
Construction: Welded
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.

Part of our Stainless Pipes and Tubes Range
£ 287.00 287.0 GBP
DN100 (4" NB) SCHEDULE 40s STAINLESS WELDED PIPE 316
Outside Diameter (OD): 114.3mm
Wall Thickness (WT): 6.02mm (Sch40)
Material: Stainless
Grade: 316
Standards: ASTM A312
Standard Length: 6 meters
Weight Per Meter: 16.32
Construction: Welded
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.



Part of our Stainless Pipes and Tubes Range
£ 709.94 709.94 GBP
DN100 (4" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 304
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
Hub length (X): 114.3mm
Neck height (A): 105.0mm
Pitch circle diameter (K): 190.5mm
Hub base diameter (Y): 76.2mm
Raised face height (RF): 15.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: Stainless Steel 304
Rating: ASA 150
Type: Weld Neck Flange (ASME B16.5)

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

Alternative terminology:
WN Flange, Welding Neck, ASA150, Stainless Steel, RF

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) SCHEDULE 80S ASA150 WELD NECK FLANGE SS 316
Outside diameter (O): 228.6mm
Flange thickness (C): 23.8mm
Hub length (X): 114.3mm
Neck height (A): 105.0mm
Pitch circle diameter (K): 190.5mm
Hub base diameter (Y): 76.2mm
Raised face height (RF): 15.5mm
Raised face diameter (R): 157.2mm
Number of bolt holes: 8
Material: Stainless Steel 316
Rating: ASA 150
Type: Weld Neck Flange (ASME B16.5)

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

Alternative terminology:
WN Flange, Welding Neck, ASA150, Stainless Steel, RF

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) SCHEDULE 80S ASA300 WELD NECK FLANGE SS 316
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) SCHEDULE 80s STAINLESS SEAMLESS PIPE 304
Outside Diameter (OD): 114.3mm
Wall Thickness (WT): 8.56mm (Sch80)
Material: Stainless
Grade: 304
Standards: ASTM A312
Standard Length: 6 meter Random
Weight Per Meter: 22.56kg
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.

Part of our Stainless Pipes and Tubes Range
Contact us for pricing 0.0 GBP
DN100 (4" NB) SCHEDULE 80s STAINLESS SEAMLESS PIPE 316
Outside Diameter (OD): 114.3mm
Wall Thickness (WT): 8.56mm (Sch80)
Material: Stainless
Grade: 316
Standards: ASTM A312
Standard Length: 6 meter Random
Weight Per Meter: 22.56kg
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.

Part of our Stainless Pipes and Tubes Range
£ 1,685.53 1685.53 GBP
DN100 (4" NB) SOCKET WELD 3PC FB BALL VALVE LEVER OP. SS 316
Threaded: 4" NB Socket Weld (SW)
Suits an outside diameter (OD) of: 114.3mm
Construction: 3 Piece
Body Material: 316 Stainless
Connection: Socket Weld
Bore: Full Bore
Internals: PTFE Seals

Applications:
Water, Oil & Gas* - Heating and Plumbing, HVAC, Gasses* and Compressed Air, Agricultural Irrigation, Fuel and Oils, Cooling, Marine, Fire Protection Sprinkler Systems, Food & Beverage.

Alternative terminology:
Isolation Valve, Lever Valve, Handle Valve, Shut off Valve, Quarter 1/4 Turn

Part of our Isolation and Valves Range
£ 1,552.11 1552.11 GBP
DN100 (4" NB) SW 150# ELBOW 45° SS 316
Thread: 4" SW (Socket Weld)
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless
Grade: 316
Elbow Angle: 45° (Degree)

Standards:
Nominal Bore, Socket Weld, Elbow, 45°, 45 Deg, Weldable, Low Pressure, 150 psi
£ 295.05 295.05 GBP
DN100 (4" NB) SW 150# ELBOW 90° SS 316
Thread: 4" SW (Socket Weld)
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless
Grade: 316
Elbow Angle: 90° (Degree)

Standards:
Nominal Bore, Socket Weld, Elbow, 90°, 90 Deg, Weldable, Low Pressure, 150 psi
£ 420.56 420.56 GBP
DN100 (4" NB) SW 150# (FXF) CONE SEAT UNION SS 316
Thread: 4" SW (Socket Weld)
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless
Grade: 316
£ 430.64 430.64 GBP
DN100 (4" NB) SW 150# EQUAL FULL SOCKET SS 316
Connection: 4" SW (Socket Weld)
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless
Grade: 316
£ 152.11 152.11 GBP
DN100 (4" NB) SW 150# EQUAL TEE SS 316
Thread: 4" SW (Socket Weld)
Suits an outside diameter of 114.3mm

Material: Stainless
Grade: 316

Standards:
Nominal Bore, SW (Socket Weld), Equal, Tee, Tee Piece, Weldable, Low Pressure, 150 psi
£ 421.89 421.89 GBP
DN100 (4" NB) SW 150# ROUND CAP SS 316
Thread: 4" SW (Socket Weld)
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless
Grade: 316

Standards:
Nominal Bore, SW (Socket Weld), Weldable, Low Pressure, 150 psi

Alternative terminology:
SW Cap, Termination, Blanking Cap, Cap End
£ 142.24 142.24 GBP
DN100 (4" NB) U-BOLT C.W NUTS SS 304 (A2)
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless Steel 304 (A2)
Thread: M12
Comes with 2x Nuts
Contact us for pricing 0.0 GBP
DN100 (4" NB) U-BOLT C.W NUTS SS 316 (A4)
Suits an outside diameter (OD) of: 114.3mm
Material: Stainless Steel 316 (A4)
Thread: M12
Comes with 2x Nuts
Contact us for pricing 0.0 GBP
DN100 (4" NB) UN-BOSSED SPLIT BAND HANGER SS 304
Suits an outside diameter (OD) of: 114.3mm
Band width: 40mm
Band thickness: 3mm
Bolt Size: M12
Material: Stainless Steel
Grade: 304
Contact us for pricing 0.0 GBP
DN100 PN10/PN16 RF SLIP ON PLATE FLANGE SS 304
Flange inside diameter of: 116.0mm (B1)
Flange overall diameter: 220mm (D)
PCD: 180mm (K)
Bolt Holes: 8 off 18mm diameter (L)
Flange Thickness: 22mm (C1)
Diameter of Raised Face (RF): 148mm (D1)
Height of raised face: 3mm (F1)
Material: Stainless Steel
Grade: 304
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Steel, Raised Faced, RFSO

Part of our Flanges and Flanged Connections Range
£ 115.01 115.01 GBP
DN100 PN10/PN16 RF SLIP ON PLATE FLANGE SS 316
Flange inside diameter of: 116.0mm (B1)
Flange overall diameter: 220mm (D)
PCD: 180mm (K)
Bolt Holes: 8 off 18mm diameter (L)
Flange Thickness: 22mm (C1)
Diameter of Raised Face (RF): 148mm (D1)
Height of raised face: 3mm (F1)
Material: Stainless Steel
Grade: 316
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Steel, Raised Faced, RFSO

Part of our Flanges and Flanged Connections Range
£ 173.46 173.46 GBP
DN100 PN25 / PN40 RF BLIND FLANGE SS 304
Flange OD (D): 235mm
Drilling (No. x Bolt Holes x L): 8 x M20 x 22mm
Pitch circle diameter (K): 190mm
Flange thickness (C4): 24mm
Material: 304
Rating: PN40
Type: Blind flange (EN1092-1 Type 05)

Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

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

Part of our Flanges and Flanged Connections Range
£ 258.02 258.02 GBP
DN100 PN25 / PN40 RF BLIND FLANGE SS 316
Flange OD (D): 235mm
Drilling (No. x Bolt Holes x L): 8 x M20 x 22mm
Pitch circle diameter (K): 190mm
Flange thickness (C4): 24mm
Material: 316
Rating: PN40
Type: Blind flange (EN1092-1 Type 05)

Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

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

Part of our Flanges and Flanged Connections Range
£ 389.13 389.13 GBP
DN100 PN25/PN40 RF SLIP ON PLATE FLANGE SS 304
Flange inside diameter of: 116.0mm (B1)
Flange overall diameter: 235mm (D)
PCD: 190mm (K)
Bolt Holes: 8 off 22mm diameter (L)
Flange Thickness: 26mm (C1)
Diameter of Raised Face (RF): 148mm (D1)
Height of raised face: 3mm (F1)
Material: Stainless Steel
Grade: 304
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Steel, Raised Faced, RFSO

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 PN25/PN40 RF SLIP ON PLATE FLANGE SS 316
Flange inside diameter of: 116.0mm (B1)
Flange overall diameter: 235mm (D)
PCD: 190mm (K)
Bolt Holes: 8 off 22mm diameter (L)
Flange Thickness: 26mm (C1)
Diameter of Raised Face (RF): 148mm (D1)
Height of raised face: 3mm (F1)
Material: Stainless Steel
Grade: 316
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Stainless Steel, Steel, Raised Faced, RFSO

Part of our Flanges and Flanged Connections Range
Contact us for pricing 0.0 GBP
DN100 X 50 (4" X 2" NB) BSP 150# REDUCING HEX BUSH SS 316
Side One Thread: 4" BSPT Male
Suits an outside diameter (OD) of: 114.3mm
Side Two Thread: 2" BSPP Female
Suits an outside diameter (OD) of: 60.3mm
Material: Stainless
Grade: 316
£ 176.26 176.26 GBP
DN100 X 50 (4" X 2" NB) BSP 150# REDUCING HEX NIPPLE SS 316
Side One Thread: 4" BSPT Male
Suits an outside diameter (OD) of: 114.3mm
Side Two Thread: 2" BSPT Male
Suits an outside diameter (OD) of: 60.3mm
Material: Stainless
Grade: 316
£ 172.90 172.9 GBP
DN100 X 50 (4" X 2" NB) BSP 150# REDUCING SOCKET SS 316
Side One Thread: 4" BSP Female
Suits an outside diameter (OD) of: 114.3mm
Side Two Thread: 2" BSP Female
Suits an outside diameter (OD) of: 60.3mm
Material: Stainless
Grade: 316
£ 201.53 201.53 GBP
DN100 X 50 (4" X 2" NB) NPT 150# REDUCING HEX BUSH SS 316
Side One Thread: 4" NPT Male
Suits an outside diameter (OD) of: 114.3mm
Side Two Thread: 2" NPT Female
Suits an outside diameter (OD) of: 60.3mm
Material: Stainless
Grade: 316
£ 224.21 224.21 GBP
DN100 X 50 (4" X 2" NB) NPT 150# REDUCING SOCKET SS 316
Side One Thread: 4" NPT Female
Suits an outside diameter (OD) of: 114.3mm
Side Two Thread: 2" NPT Female
Suits an outside diameter (OD) of: 60.3mm
Material: Stainless
Grade: 316
£ 211.26 211.26 GBP
DN100 X 50 (4" X 2" NB) SW 150# REDUCING SOCKET SS 316
Side One Connection: 4" SW (Socket Weld)
Suits an outside diameter (OD) of: 114.3mm
Side Two Connection: 2" SW (Socket Weld)
Suits an outside diameter (OD) of: 60.3mm
Material: Stainless
Grade: 316
£ 199.08 199.08 GBP
DN100 X 65 (4" X 2.1/2" NB) BSP 150# REDUCING HEX BUSH SS 316
Side One Thread: 4" BSPT Male
Suits an outside diameter (OD) of: 114.3mm
Side Two Thread: 2.1/2" BSPP Female
Suits an outside diameter (OD) of: 73mm
Material: Stainless
Grade: 316
£ 176.26 176.26 GBP