Skip to Content

Integraflow Store 

  1. Products
  2. Mild Steel
  3. Nominal Bore
  4. Flanges
  5. Slip on
  6. Bossed

Bossed

Bossed Slip-On Flanges – ASA 125, 150, 300, 600, 900, 1500 – A105N

Integraflow supplies bossed (hubbed) slip-on flanges in A105N carbon steel, covering ASA/ANSI pressure ratings 125, 150, 300, 600, 900, and 1500, with options sourced from both European and Far Eastern mills, and full BS EN 10204 3.1 material certification available, ideal for high-integrity pipeline systems in oil, gas, steam, and industrial applications.

List 600
Sort By: Name (A-Z)

Bossed

DN450 (18" NB) ASA150 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 635.0mm (O)
Flange thickness: 39.6mm (C)
Flange hub height: 68.3mm (Y)
Pitch Circle Diameter (PCD): 577.8mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 16 off 31.7mm diameter
Bore Diameter: 461.7mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 150LB, SOB
Contact us for pricing 0.0 GBP
DN450 (18" NB) ASA1500 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 914.4mm (O)
Flange thickness: 162.0mm (C)
Flange hub height: 106.4mm (Y)
Pitch Circle Diameter (PCD): 774.7mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 16 off 73.1mm diameter
Bore Diameter: 461.7mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 1500LB, SOB
Contact us for pricing 0.0 GBP
DN450 (18" NB) ASA300 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 711.2mm (O)
Flange thickness: 60.4mm (C)
Flange hub height: 88.9mm (Y)
Pitch Circle Diameter (PCD): 628.6mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 24 off 35.0mm diameter
Bore Diameter: 461.7mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 300LB, SOB
Contact us for pricing 0.0 GBP
DN450 (18" NB) ASA600 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 742.9mm (O)
Flange thickness: 82.5mm (C)
Flange hub height: 117.3mm (Y)
Pitch Circle Diameter (PCD): 654.0mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 24 off 44.4mm diameter
Bore Diameter: 461.7mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 600LB, SOB
Contact us for pricing 0.0 GBP
DN450 PN10 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 615mm (D)
Flange inside diameter: 462.0mm (B1)
Flange thickness (C2): 36mm
Pitch Circle Diameter (PCD): 565mm (K)
Hub height: 63mm (H1)
Neck diameter: 502mm (N2)
Raised Face Diameter: 532mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 26mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN450 PN16 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 640mm (D)
Flange inside diameter: 462.0mm (B1)
Flange thickness (C2): 34mm
Pitch Circle Diameter (PCD): 585mm (K)
Hub height: 68mm (H1)
Neck diameter: 502mm (N2)
Raised Face Diameter: 550mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 30.0mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN450 PN25 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 670mm (D)
Flange inside diameter: 462.0mm (B1)
Flange thickness (C2): 46mm
Pitch Circle Diameter (PCD): 600mm (K)
Hub height: 84mm (H1)
Neck diameter: 520mm (N2)
Raised Face Diameter: 555mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 36mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN450 PN40 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 715mm (D)
Flange inside diameter: 462.0mm (B1)
Flange thickness (C2): 57mm
Pitch Circle Diameter (PCD): 650mm (K)
Hub height: 84mm (H1)
Neck diameter: 532mm (N2)
Raised Face Diameter: 600mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 39mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN500 (20" NB) ASA150 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 698.5mm (O)
Flange thickness: 42.9mm (C)
Flange hub height: 73.1mm (Y)
Pitch Circle Diameter (PCD): 635.0mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 20 off 31.7mm diameter
Bore Diameter: 513.0mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 150LB, SOB
Contact us for pricing 0.0 GBP
DN500 (20" NB) ASA1500 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 984.2mm (O)
Flange thickness: 177.8mm (C)
Flange hub height: 112.0mm (Y)
Pitch Circle Diameter (PCD): 831.8mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 16 off 79.2mm diameter
Bore Diameter: 513.0mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 1500LB, SOB
Contact us for pricing 0.0 GBP
DN500 (20" NB) ASA300 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 774.7mm (O)
Flange thickness: 63.5mm (C)
Flange hub height: 95.2mm (Y)
Pitch Circle Diameter (PCD): 685.8mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 24 off 35.0mm diameter
Bore Diameter: 513.0mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 300LB, SOB
Contact us for pricing 0.0 GBP
DN500 (20" NB) ASA600 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 812.8mm (O)
Flange thickness: 88.9mm (C)
Flange hub height: 127.0mm (Y)
Pitch Circle Diameter (PCD): 723.9mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 24 off 44.4mm diameter
Bore Diameter: 513.0mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 600LB, SOB
Contact us for pricing 0.0 GBP
DN500 PN10 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 670mm (D)
Flange inside diameter: 513.5mm (B1)
Flange thickness (C2): 38mm
Pitch Circle Diameter (PCD): 620mm (K)
Hub height: 67mm (H1)
Neck diameter: 559mm (N2)
Raised Face Diameter: 585mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 26mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN500 PN16 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 715mm (D)
Flange inside diameter: 513.5mm (B1)
Flange thickness (C2): 36mm
Pitch Circle Diameter (PCD): 650mm (K)
Hub height: 73mm (H1)
Neck diameter: 559mm (N2)
Raised Face Diameter: 610mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 33.0mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN500 PN25 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 730mm (D)
Flange inside diameter: 513.5mm (B1)
Flange thickness (C2): 48mm
Pitch Circle Diameter (PCD): 660mm (K)
Hub height: 90mm (H1)
Neck diameter: 580mm (N2)
Raised Face Diameter: 615mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 36mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN500 PN40 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 785mm (D)
Flange inside diameter: 513.5mm (B1)
Flange thickness (C2): 57mm
Pitch Circle Diameter (PCD): 670mm (K)
Hub height: 90mm (H1)
Neck diameter: 576mm (N2)
Raised Face Diameter: 615mm (d1)
Height of Raised Face: 4mm (f1)
Bolt Holes: 20 off 42mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN600 (24" NB) ASA150 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 812.8mm (O)
Flange thickness: 47.7mm (C)
Flange hub height: 82.5mm (Y)
Pitch Circle Diameter (PCD): 749.3mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 20 off 35.0mm diameter
Bore Diameter: 615.9mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 150LB, SOB
Contact us for pricing 0.0 GBP
DN600 (24" NB) ASA1500 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 1168.4mm (O)
Flange thickness: 203.2mm (C)
Flange hub height: 127.0mm (Y)
Pitch Circle Diameter (PCD): 990.6mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 16 off 91.9mm diameter
Bore Diameter: 615.9mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 1500LB, SOB
Contact us for pricing 0.0 GBP
DN600 (24" NB) ASA300 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 914.4mm (O)
Flange thickness: 69.8mm (C)
Flange hub height: 106.4mm (Y)
Pitch Circle Diameter (PCD): 812.8mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 24 off 41.1mm diameter
Bore Diameter: 615.9mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 300LB, SOB
Contact us for pricing 0.0 GBP
DN600 (24" NB) ASA600 RF BOSSED SLIP ON FLANGE CS A105N
Flange outside diameter: 939.8mm (O)
Flange thickness: 101.6mm (C)
Flange hub height: 139.7mm (Y)
Pitch Circle Diameter (PCD): 838.2mm (K)
Raised Face Height: 6.3mm (RF)
Bolt Holes: 24 off 50.8mm diameter
Bore Diameter: 615.9mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 600LB, SOB
Contact us for pricing 0.0 GBP
DN600 PN10 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 780mm (D)
Flange inside diameter: 613.5mm (B1)
Flange thickness (C2): 40mm
Pitch Circle Diameter (PCD): 725mm (K)
Hub height: 75mm (H1)
Neck diameter: 658mm (N2)
Raised Face Diameter: 685mm (d1)
Height of Raised Face: 5mm (f1)
Bolt Holes: 20 off 30mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN600 PN16 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 840mm (D)
Flange inside diameter: 616.5mm (B1)
Flange thickness (C2): 40mm
Pitch Circle Diameter (PCD): 770mm (K)
Hub height: 83mm (H1)
Neck diameter: 658mm (N2)
Raised Face Diameter: 725mm (d1)
Height of Raised Face: 5mm (f1)
Bolt Holes: 20 off 36.0mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN600 PN25 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 845mm (D)
Flange inside diameter: 616.5mm (B1)
Flange thickness (C2): 48mm
Pitch Circle Diameter (PCD): 770mm (K)
Hub height: 100mm (H1)
Neck diameter: 684mm (N2)
Raised Face Diameter: 720mm (d1)
Height of Raised Face: 5mm (f1)
Bolt Holes: 20 off 39mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN600 PN40 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 890mm (D)
Flange inside diameter: 616.5mm (B1)
Flange thickness (C2): 72mm
Pitch Circle Diameter (PCD): 795mm (K)
Hub height: 100mm (H1)
Neck diameter: 686mm (N2)
Raised Face Diameter: 685mm (d1)
Height of Raised Face: 5mm (f1)
Bolt Holes: 24 off 48mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN700 PN16 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 910mm (D)
Flange inside diameter: 717.0mm (B1)
Flange thickness (C2): 40mm
Pitch Circle Diameter (PCD): 840mm (K)
Hub height: 86mm (H1)
Neck diameter: 764mm (N2)
Raised Face Diameter: 795mm (d1)
Height of Raised Face: 5mm (f1)
Bolt Holes: 24 off 39.0mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN800 PN16 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 1025mm (D)
Flange inside diameter: 818.0mm (B1)
Flange thickness (C2): 45mm
Pitch Circle Diameter (PCD): 950mm (K)
Hub height: 864mm (H1)
Neck diameter: 12mm (N2)
Raised Face Diameter: 5mm (d1)
Height of Raised Face: 24mm (f1)
Bolt Holes: M36 off 139.6mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN900 PN16 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 1125mm (D)
Flange inside diameter: 922.0mm (B1)
Flange thickness (C2): 48mm
Pitch Circle Diameter (PCD): 1050mm (K)
Hub height: 968mm (H1)
Neck diameter: 12mm (N2)
Raised Face Diameter: 5mm (d1)
Height of Raised Face: 28mm (f1)
Bolt Holes: M39 off 310.0mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP
DN1000 PN16 RF BOSSED SLIP ON FLANGE CS S235JR
Flange outside diameter: 1255mm (D)
Flange inside diameter: 1022.0mm (B1)
Flange thickness (C2): 59mm
Pitch Circle Diameter (PCD): 1170mm (K)
Hub height: 1072mm (H1)
Neck diameter: 16mm (N2)
Raised Face Diameter: 5mm (d1)
Height of Raised Face: 28mm (f1)
Bolt Holes: M39 off 362.0mm diameter (L)
Material: Mild Steel
Grade: S235 JR
Standards: EN1092-1
Flange Face: Raised Face
Certification Available: 2.1 BS EN 10204 Material Certification

Alternative terminology:
Bossed Slip on Flange, Weld on, Mild Steel, Carbon Steel, Raised Faced, SOB
Contact us for pricing 0.0 GBP