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ASTM A105 Flange

SA 105 Forged Flange and Carbon Steel Flanges manufacturer in India.

Carbon Steel Flanges Manufacturer In India

Carbon Steel Slip On Flanges

Carbon Steel Weld Neck Flanges

Table of contents

What Is A105 Flange?

A105 Flange material is a forged carbon steel. ASTM A105 Flange Manufacturer in India produce different types and grades of the ASTM A105 Weld Neck Flange for sale. These are widely used in the market for non-critical applications. The ASTM A105 Blind Flange Material by default is not normalization heat treated. A105 Normalized Flanges are called the Ansi A105n Flanges where the n stands for normalization heat treatment. The heat treatment makes the Ansi A105 Flanges much harder and stronger.

What Use Of Carbon Steel Flanges In Piping?

These are developed and produced in different shapes and forms. Carbon Steel Flange with their welded necks are good picks for piping with bending stress crack risk. Carbon Steel Blind Flange cannot be used in extreme conditions because of the carbon steel material. They can stand up to certain levels but not overtake the high chromium molybdenum alloy counterparts of them. The prominent difference in A105 Vs A105n Flanges is the normalization heat treatment and the strength as a result. Their materials are the same, the composition is the same, and it is just the heat treatment that makes the differences.

A105 Reducing Flange Can Be Used To Fit Pipes Of Two Different Diameters?

 

A105 Reducing Flange can be used to fit pipes of two different diameters. One end of the reducing flange corresponds to the diameter of one pipe and the other end of the reducing flange corresponds to the diameter of the other pipe in the connection. Carbon Steel Weld Neck Flanges have the welded neck feature along with the heat treatment which makes them stronger. Carbon Steel Pipe Flanges could be used in applications such as food processing industry, chemical industry, oil and gas pipelines and more. Carbon Steel Slip On Flanges could be easily welded if needed. There are specifications by ASME as to which temperature and pressure the material could be welded at. ASTM A105 Blind Flange is a type that is used to seal the end of a pipe opening. These are forged flanges, so they stand the pressure without cracking. Also, this material is annealed so that it can withstand high temperatures in the application.

ASTM A105 Flange Manufacturer

ASTM A105 Blind Flange

ASTM A105 Weld Neck Flange

Carbon Steel Pipe Flange Specifications

Material Specification Of : Carbon Steel Flanges And ASTM A105 Flanges
Standard Cover : pressure ratings & temperature ratings, materials, marking, dimensions, weight, tolerances, testing
Contact Faces RTJ (Ring Type Joint) Flanges, FF (Flat Face) Flanges, RF (Raised Face) Flanges, T/G (Tongue And Groove ) Flanges, M/F (Male And Female) Flanges
Size Chart Normal Pipe Size 1/2 to NPS 24"
Thickness Normal Pipe Size ≤ 18
Bore Diameter Normal Pipe ≤ 10
Flanges Standards EN 1092-1 Flanges, JIS Flanges, ASME B16.5 Flanges, ASME B16.47 type A Flanges, UNI Flanges, DIN Flanges
Pressure Rating Class 150 To Class 2500
High Temperature Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature Above -29 Degree C (−20°F)
Common Types Of Flanges: Slip On (SORF) Flanges, Weld Neck (WNRF) Flanges, Blind (BLRF) Flanges, Lap Joint (Loose) Flanges, Threaded (NPT) Flanges, Socket-Weld (SWRF) Flanges
Special Types Of Flanges : Nipoflange, Elboflange, Latroflange, Swivel Flanges, Expanding Flanges, Reducing Flanges, Weldoflange
Marking Standard Name of Manufacturer
Schedule
Type of Flange Facing
Nominal Pipe Size
Pressure Class
ASME B16 Designation
Bolt Type high strength bolts
medium strength bolts
low strength bolts
European Standard Flanges JIS B2220 Flanges (5k to 30k) and KS1503 flanges
Russian-Standard Flanges GOST 12820 / 12821-80, DIN, UNI, EN 1092-1
South African Standard Flanges SANSflanges And SABS flanges
Surface Finish smooth, concentric serrated, stock
Gaskets Types Full Face Gasket Flanges
Flat Ring Gasket Flanges
Metallic Ring Gakset Flanges
Advantages Of Pipe Flange Used to Connect Pipe System
Easy Repair Pipe System
Assembled Without Welding

CS Flanges Hs Code

73072100 Carbon Steel Flanges 601

Check A105n Flanges Pressure Class and ASTM A105 Slip On/ Blind/ Weld Neck Flange Dimensions/ Temperature Ratings.

ASTM CS Flange Weight Chart

Nominal Pipe Sizes (NPS) Slip On (SORF) Threaded (NPT) Socket Weld (SWRF) Lap Joint (Loose) Blind (BLRF) Weld Neck (WRNR)
½ 1 1 2 1 2 2
¾ 2 2 2 2 2 2
1 2 2 2 2 2 3
1¼ 3 3 3 3 3 3
1½ 3 3 3 3 4 4
2 5 5 5 5 5 6
2½ 8 8 8 8 7 10
3 9 9 9 9 9 11.5
3½ 11 12 11 11 13 12
4 13 13 13 13 17 16.5
5 15 15 15 15 20 21
6 19 19 19 19 27 26
8 30 30 30 30 47 42
10 43 43 43 43 70 54
12 64 64 64 64 123 88
14 90 90 90 105 140 114
16 106 98 98 140 180 140
18 130 130 130 160 220 165
20 165 165 165 195 285 197
22 185 185 185 245 355 225
24 220 220 220 275 430 268

Carbon Steel Flange Dimensions

NPS O.D. of Flange Flanges Thickness Diameter of RF Diameter of Hub at Base Lengtd Tdru Hub Bore or Diameter Dia. of Hub at Bevel Radius of Fillet Deptd of Socket
Welding (WN) Neck Slip-On (SORF) Threaded (NPT) Socket (SWRF) Lap Joint (Loose) Slip-on (SORF) Socket (SWRF) Lap Joint (Loose)
O Q R X Y Y Y W B H r Z
1/2 3-1/2 7/16 1-3/8 1-3/16 1-7/8 5/8 5/8 .88 .90 .84 1/8 3/8
3/4 3-7/8 1/2 1-11/16 1-1/2 2-1/16 5/8 5/8 1.09 1.11 1.05 1/8 7/16
1 4-1/4 9/16 2 1-15/16 2-3/16 11/16 11/16 1.36 1.38 1.32 1/8 1/2
1-1/4 4-5/8 5/8 2-1/2 2-5/16 2-1/4 13/16 13/16 1.70 1.72 1.66 3/16 9/16
1-1/2 5 11/16 2-7/8 2-9/16 2-7/16 7/8 7/8 1.95 1.97 1.90 1/4 5/8
2 6 3/4 3-5/8 3-1/16 2-1/2 1 1 2.44 2.46 2.38 5/16 11/16
2-1/2 7 7/8 4-1/8 3-9/16 2-3/4 1-1/8 1-1/8 2.94 2.97 2.88 5/16 3/4
3 7-1/2 15/16 5 4-1/4 2-3/4 1-3/16 1-3/16 3.57 3.60 3.50 3/8 13/16
3-1/2 8-1/2 15/16 5-1/2 4-13/16 2-13/16 1-1/4 1-1/4 4.07 4.10 4.00 3/8 7/8
4 9 15/16 6-3/16 5-5/16 3 1-5/16 1-5/16 4.57 4.60 4.50 7/16 15/16
5 10 15/16 7.5/16 6-7/16 3-1/2 1-7/16 1-7/16 5.66 5.69 5.56 7/16 15/16
6 11 1 8-1/2 7-9/16 3-1/2 1-9/16 1-9/16 6.72 6.75 6.63 1/2 1-1/16
8 13-1/2 1-1/8 10-5/8 9-11/16 4 1-3/4 1-3/4 8.72 8.75 8.63 1/2 1-1/4
10 16 1-3/16 12-3/4 12 4 1-15/16 1-15/16 10.88 10.92 10.75 1/2 1-5/16
12 19 1-1/4 15 14-3/8 4-1/2 2-3/16 2-3/16 12.88 12.92 12.75 1/2 1-9/16
14 21 1-3/8 16-1/4 15-3/4 5 2-1/4 3-1/8 14.14 14.18 14.00 1/2 1-5/8
16 23-1/2 1-7/16 18-1/2 18 5 2-1/2 3-7/16 16.16 16.19 16.00 1/2 1-3/4
18 25 1-9/16 21 19-7/8 5-1/2 2-11/16 3-13/16 18.18 18.20 18.00 1/2 1-15/16
20 27-1/2 1-11/16 23 22 5-11/16 2-7/8 4-1/16 20.20 20.25 20.00 1/2 2-1/8
24 32 1-7/8 27-1/4 26-1/8 6 3-1/4 4-3/8 24.25 24.25 24.00 1/2 2-1/2

CS Flange Weight Chart And ASTM A105 Flange Manufacturer In India, Carbon Steel Forged Flanges Bolt Size Chart In MM.

Class 150 Carbon Steel Flange Pressure Rating

Temperature (in F°) 150 LBS
< 100 285
200 260
300 230
400 200
500 170
600 140
650 125
700 110
750 95
800 80
850 65
900 50
950 35
1000 20

Class 300 Carbon Steel Flange Pressure Rating

Temperature (in F°)
Class 300 Flanges
100
740
200
680
300
655
400
635
500
605
600
570
650
550
700
530
750
505
800
410
850
320
900
230
950
135
1000
85

Carbon Steel Flange Size Chart

DN In inchesDimensionASTM A105 Carbon Steel Flanges Dimensional Sizes 1/2 inches to 2 1/2 inches
125 LBS
150 LBS		300 LBS400 LBS600 LBS900 LBS1500 LBS2500 LBS
inchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeter
1/2A3 1/288.93 3/495.23 3/495.23 3/495.24 3/41214 3/41215 1/4133.4
b7/1611.19/1614.39/1614.39/1614.37/822.27/822.21 3/1630.2
D21 3/834.91 3/834.91 3/834.91 3/834.91 3/834.91 3/834.91 3/834.9
D12 3/860.32 5/866.72 5/866.72 5/866.73 1/482.63 1/482.63 1/288.9
n44444444444-444
d5/815.95/815.95/815.95/815.97/822.27/822.27/822.2
3/4A3 7/898.44 5/8117.54 5/8117.54 5/8117.55 1/81305 1/81305 1/2139.7
b1/212.75/815.95/815.95/815.9125.4125.41 1/431.8
D21 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.9
D12 3/469.83 1/482.53 1/482.53 1/482.53 1/288.93 1/288.93 3/495.2
n44444444444-444
d5/815.93/4193/4193/4197/822.27/822.27/822.2
1A4 1/41084 7/8123.84 7/8123.84 7/8123.85 7/8149.25 7/8149.26 1/4159
b9/1614.311/1617.511/1617.511/1617.51 1/828.61 1/828.61 3/834.9
D2250.8250.8250.8250.8250.8250.8250.8
D13 1/879.43 1/288.93 1/288.93 1/288.9410241024 1/4108
n44444444444444
d5/815.93/4193/4193/419125.4125.4125.4
1 1/4A4 5/8117.55 1/4133.45 1/4133.45 1/4133.46 1/41596 1/41597 1/4184.2
b5/815.93/41913/1620.613/1620.61 1/828.61 1/828.61 1/238.1
D22 1/263.52 1/263.52 1/263.52 1/263.52 1/263.52 1/263.52 1/263.5
D13 1/288.93 7/898.43 7/898.43 7/898.44 3/81114 3/81115 1/8130
n44444444444444
d5/815.93/4193/4193/419125.4125.41 1/828.6
1 1/2A51276 1/8155.66 1/8155.66 1/8155.67177.87177.88203
b11/1617.513/1620.67/822.27/822.21 1/431.81 1/431.81 3/444.5
D22 7/873 982 7/8732 7/8732 7/8732 7/8732 7/8732 7/873
D13 7/844 1/21144 1/21144 1/21144 7/81244 7/81245 3/4146
n44444444444444
d5/8. 15.97/822.27/822.27/822.21 1/828.61 1/828.61 1/431.8
2A6152.46 1/2165.16 1/2165.16 1/2165.18 1/2215.98 1/2215.99 1/4234.9
b3/4197/822.2125.4125.41 1/238.11 1/238.1250.8
D23 5/892.13 5/892.13 5/892.13 5/892.13 5/892.13 5/892.13 5/892.1
D14 3/41215127512751276 1/2165.16 1/2165.16 3/4171
n44888888888888
d3/4193/4193/4193/419125.4125.41 1/828.6
2 1/2A7177.87 1/2190.57 1/2190.57 1/2190.59 5/82449 5/824410 1/2266.7
b7/822.2125.41 1/828.61 1/828.61 5/841.31 5/841.32 1/457.2
D24 1/8104.84 1/8104.84 1/8104.84 1/8104.84 1/81054 1/81054 1/8105
D15 1/2139.75 7/8149.25 7/8149.25 7/8149.27 1/2190.57 1/2190.57 3/4197
n44888888888888
d3/4197/822.27/822.27/822.21 1/828.61 1/828.61 1/431.8

Carbon Steel Weld Neck Flanges Tolerance Formula And ASTM A105 Flange Thickness Calculation.

Carbon Steel Flange Thickness

Carbon Steel Flanges Wall Thickness
NPS (Normal Pipe Sizes) Outside Daimeter (O.D.) Schedule 10 Schedule 20 Schedule 30 STD Wall Schedule 40 Schedule 60 EXT Hvy Schedule 80 Schedule 100 Schedule 120 Schedule 140 Schedule 160 XX Hvy
½ 0.84 0.083 ... ... 0.109 0.109 ... 0.147 0.147 ... ... ... 0.188 0.294
¾ 1.05 0.083 ... ... 0.113 0.113 ... 0.154 0.154 ... ... ... 0.219 0.308
1 1.315 0.109 ... ... 0.133 0.133 ... 0.179 0.179 ... ... ... 0.25 0.358
1 ¼ 1.66 0.109 ... ... 0.14 0.14 ... 0.191 0.191 ... ... ... 0.25 0.382
1 ½ 1.9 0.109 ... ... 0.145 0.145 ... 0.2 0.2 ... ... ... 0.281 0.4
2 2.375 0.109 ... ... 0.154 0.154 ... 0.218 0.218 ... ... ... 0.344 0.436
2 ½ 2.875 0.12 ... ... 0.203 0.203 ... 0.276 0.276 ... ... ... 0.375 0.552
3 3.5 0.12 ... ... 0.216 0.216 ... 0.3 0.3 ... ... ... 0.438 0.6
3 ½ 4 0.12 ... ... 0.226 0.226 ... 0.318 0.318 ... ... ... ... 0.636
4 4.5 0.12 ... ... 0.237 0.237 ... 0.337 0.337 ... 0.438 ... 0.531 0.674
5 5.563 0.134 ... ... 0.258 0.258 ... 0.375 0.375 ... 0.5 ... 0.625 0.75
6 6.625 0.134 ... ... 0.28 0.28 ... 0.432 0.432 ... 0.562 ... 0.719 0.864
8 8.625 0.148 0.25 0.277 0.322 0.322 0.406 0.5 0.5 0.594 0.719 0.812 0.906 0.875
10 10.75 0.165 0.25 0.307 0.365 0.365 0.5 0.5 0.594 0.719 0.844 1 1.125 1
12 12.75 0.18 0.25 0.33 0.375 0.406 0.562 0.5 0.688 0.844 1 1.125 1.312 1
14 14 0.25 0.312 0.375 0.375 0.438 0.594 0.5 0.75 0.938 1.094 1.25 1.406 ...
16 16 0.25 0.312 0.375 0.375 0.5 0.656 0.5 0.844 1.031 1.219 1.438 1.594 ...
18 18 0.25 0.312 0.438 0.375 0.562 0.75 0.5 0.938 1.156 1.375 1.562 1.781 ...
20 20 0.25 0.375 0.5 0.375 0.594 0.812 0.5 1.031 1.281 1.5 1.75 1.969 ...
22 22 0.25 ... ... 0.375 ... ... 0.5 ... ... .... .... .... ....
24 24 0.25 0.375 0.562 0.375 0.688 0.969 0.5 1.219 1.531 1.812 2.062 2.344 ....
26 26 .... .... .... 0.375 .... .... 0.5 .... .... .... .... .... ....
30 30 0.312 0.5 0.625 0.375 .... .... 0.5 .... .... .... .... .... ....
36 36 0.312 0.5 0.625 0.375 0.75 .... 0.5 .... .... .... .... .... ....
40 40 .... .... .... 0.375 .... .... 0.5 .... .... .... .... .... ....
42 42 …….. …….. …….. 0.375 …….. …….. 0.5 …….. …….. …….. …….. …….. ……..
48 48 …….. …….. …….. 0.375 …….. …….. 0.5 …….. …….. …….. …….. …….. ……..

Carbon Steel Flange Bolt Chart

Class 150 Flanges Class 300 Flanges Class 600 Flanges
NPS # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length
1/16 RF RTJ 1/16 RF RTJ 1/4 RF RTJ
1/2 4 0.50 2-1/4 – 4 0.50 2-1/2 3 4 0.50 3 3
3/4 4 0.50 2-1/2 – 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1 4 0.50 2-1/2 3 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1-1/4 4 0.50 2-3/4 3-1/4 4 0.63 3-1/4 3-3/4 4 0.63 3-3/4 3-3/4
1-1/2 4 0.50 2-3/4 3-1/4 4 0.75 3-1/2 4 4 0.75 4-1/4 4-1/4
2 4 0.63 3-1/4 3-3/4 8 0.63 3-1/2 4 8 0.63 4-1/4 4-1/4
2-1/2 4 0.63 3-1/2 4 8 0.75 4 4-1/2 8 0.75 4-3/4 4-3/4
3 4 0.63 3-1/2 4 8 0.75 4-1/4 4-3/4 8 0.75 5 5
3-1/2 8 0.63 3-1/2 4 8 0.75 4-1/4 5 8 0.88 5-1/2 5-1/2
4 8 0.63 3-1/2 4 8 0.75 4-1/2 5 8 0.88 5-3/4 5-3/4
5 8 0.75 3-3/4 4-1/4 8 0.75 4-3/4 5-1/4 8 1.00 6-1/2 6-1/2
6 8 0.75 4 4-1/2 12 0.75 4-3/4 5-1/2 12 1.00 6-3/4 6-3/4
8 8 0.75 4-1/4 4-3/4 12 0.88 5-1/2 6 12 1.13 7-1/2 7-3/4
10 12 0.88 4-1/2 5 16 1.00 6-1/4 6-3/4 16 1.25 8-1/2 8-1/2
12 12 0.88 4-3/4 5-1/4 16 1.13 6-3/4 7-1/4 20 1.25 8-3/4 8-3/4
14 12 1.00 5-1/4 5-3/4 20 1.13 7 7-1/2 20 1.38 9-1/4 9-1/4
16 16 1.00 5-1/4 5-3/4 20 1.25 7-1/2 8 20 1.50 10 10
18 16 1.13 5-3/4 6-1/4 24 1.25 7-3/4 8-1/4 20 1.63 10-3/4 10-3/4
20 20 1.13 6-1/4 6-3/4 24 1.25 8 8-3/4 24 1.63 11-1/4 11-1/2
24 20 1.25 6-3/4 7-1/4 24 1.50 9 10 24 1.88 13 13-1/4
Class 900 Flanges Class 1500 Flanges Class 2500 Flanges
NPS # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length
1/4 RF RTJ 1/4 RF RTJ 1/4 RF RTJ
1/2 4 0.75 4-1/4 4-1/4 4 0.75 4-1/4 4-1/4 4 0.75 4-3/4 4-3/4
3/4 4 0.75 4-1/2 4-1/2 4 0.75 4-1/2 4-1/2 4 0.75 5 5
1 4 0.88 5 5 4 0.88 5 5 4 0.88 5-1/2 5-1/2
1-1/4 4 0.88 5 5 4 0.88 5 5 4 1.00 6 6
1-1/2 4 1.00 5-1/2 5-1/2 4 1.00 5-1/2 5-1/2 4 1.13 6-3/4 6-3/4
2 8 0.88 5-3/4 5-3/4 8 0.88 5-3/4 5-3/4 8 1.00 7 7
2-1/2 8 1.00 6-1/4 6-1/4 8 1.00 6-1/4 6-1/4 8 1.13 7-3/4 8
3 8 0.88 5-3/4 5-3/4 8 1.13 7 7 8 1.25 8-3/4 9
4 8 1.13 6-3/4 6-3/4 8 1.25 7-3/4 7-3/4 8 1.50 10 10-1/4
5 8 1.25 7-1/2 7-1/2 8 1.50 9-3/4 9-3/4 8 1.75 11-3/4 12-1/4
6 12 1.13 7-1/2 7-3/4 12 1.38 10-1/4 10-1/2 8 2.00 13-1/2 14
8 12 1.38 8-3/4 8-3/4 12 1.63 11-1/2 11-3/4 12 2.00 15 15-1/2
10 16 1.38 9-1/4 9-1/4 12 1.88 13-1/4 13-1/2 12 2.50 19-1/4 20
12 20 1.38 10 10 16 2.00 14-3/4 15-1/4 12 2.75 21-1/4 22
14 20 1.50 10-3/4 11 16 2.25 16 16-3/4 – – – –
16 20 1.63 11-1/4 11-1/2 16 2.50 17-1/2 18-1/2 – – – –
18 20 1.88 12-3/4 13-1/4 16 2.75 19-1/2 20-3/4 – – – –
20 20 2.00 13-3/4 14-1/4 16 3.00 21-1/4 22-1/4 – – – –
24 20 2.50 17-1/4 18 16 3.50 24-1/4 25-1/2 – – – –

Carbon Steel Flange Torque Values

Size in Inches Size in millimeter Max. Radial Projection of Imperfections that are
No Deeper Than the Bottom of the Serrations, millimeter Deeper Than the Bottom of the Serrations, millimeter
1/2 15 3.0 1.5
3/4 20 3.0 1.5
1 25 3.0 1.5
1 1/4 32 3.0 1.5
1 1/2 40 3.0 1.5
2 50 3.0 1.5
2 1/2 65 3.0 1.5
3 80 4.5 1.5
3 1/2 90 6.0 3.0
4 100 6.0 3.0
5 125 6.0 3.0
6 150 6.0 3.0
8 200 8.0 4.5
10 250 8.0 4.5
12 300 8.0 4.5
14 350 8.0 4.5
16 400 10.0 4.5
18 450 12.0 6.0
20 500 12.0 6.0
24 600 12.0 6.0

Gasket Size Chart Of Carbon Steel Flanges ASTM A105 And ASTM A105 Flange Specification Format.

Gasket For Carbon Steel Flange

NPS Gasket I.D.
 Gasket O.D.
Class 150 Class 300 Class 400 Class 600 Class 900
1/2 0.84 1.875 2.125 2.125 2.125 2.50
3/4 1.06 2.25 2.625 2.625 2.625 2.75
1 1.31 2.625 2.875 2.875 2.875 3.125
1 1/4 1.66 3 3.25 3.25 3.25 3.50
1 1/2 1.91 3.375 3.75 3.75 3.75 3.875
2 2.38 4.125 4.375 4.375 4.375 5.625
2 1/2 2.88 4.875 5.125 5.125 5.125 6.50
3 3.50 5.375 5.875 5.875 5.875 6.625
4 4.50 6.875 7.125 7.00 7.625 8.125
5 5.56 7.75 8.50 8.375 9.50 9.75
6 6.62 8.75 9.875 9.75 10.50 11.375
8 8.62 11 12.125 12.00 12.625 14.125
10 10.75 13.375 14.25 14.125 15.75 17.125
12 12.75 16.125 16.625 16.50 18.00 19.625

CS Pipe Flanges Tolerance Chart

ASME B16.5Tolerance
A Outside Diameter (O.D.)
  • When Outside Diameter (O.D.) is 24" or less: ±1/16" (1.6 mm)
  • When Outside Diameter (O.D.) is over 24": ±1/8" (3.2 mm)
D Inside Diameter
  • 10" and smaller: ±1/32" (0.8 millimeter)
  • 12" thru 18": +1/8" (3.2 millimeter)
  • 20" and larger: -1/16" (1.6 millimeter)
B Diameter of contact face
  • 1/16" raised face: ±1/32" (0.8 millimeter)
  • 1/4" Raised Face (RF), Tongue & Groove (T/G), (male & female), (m/f): ±1/64" (0.4 mm)
J Diameter of hub at base
  • When hub base is 24" or smaller: ±1/16" (1.6 millimeter)
  • When hub base is over 24": ±1/8" (3.2 millimeter)
H Diameter of hub at point of welding
  • 5" and smaller: +3/32" (2.4 millimeter), -1/32" (0.8 millimeter)
  • 6" and larger: +5/32" (4.0 millimeter), -1/32 (0.8 millimeter)
P Drilling
  • Bolt circle: ±1/16" (1.6 millimeter)
  • Bolt hole spacing: ±1/32" (0.8 millimeter)
  Eccentricity of bolt circle with respect to facing
  • 2 1/2" and smaller ±1/32" (0.8 millimeter) max.
  • 3" and larger ±1/16" (1.6 millimeter) max.
C Thickness
  • 18" and smaller: ±1/8" (3.2 millimeter), -0"
  • 20" and larger: ±3/16" (4.8 millimeter), -0"
K Length of hub
  • 10" and smaller: ±1/16" (1.6 millimeter)
  • 12" and larger: ±1/8" (3.2 millimeter)

ASTM A105 Flanges Mechanical Properties

Tensile Strength minimum Yield Strength minimum Elongation minimum Reduction of Area, minimum Hardness
MPa ksi MPa ksi % % HBW
485 70 250 36 22 30 137-187

ASTM A105 Flanges Chemical Composition

Elements Composition, %
Carbon [C] ≤0.35
Manganese [Mn] 0.60-1.05
Phosphorus [P] ≤0.35
Sulfur [S] ≤0.40
Silicon [Si] 0.10-0.35
Copper [Cu] ≤0.40
Nickel [Ni] ≤0.40
Chromium [Cr] ≤0.30
Molybdenum [Mo] ≤0.12
Vanadium [V] ≤0.08

Carbon Steel A105 Flanges Physical Properties

Density (lb / cu. in.) 0.284
Specific Gravity 7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) 0.107
Melting Point (Deg F) 2740
Thermal Conductivity 360
Mean Coeff Thermal Expansion 6.7
Modulus of Elasticity Tension 30
Modulus of Elasticity Torsion 11

ASTM A105 Flange Pressure Rating

Carbon Steel Flanges pressure rating in psig
( A105 / A350 LF2 / A350 LF3 / A350 LF6)
Temperature (F°)
Class 150
Class 300
Class 400
Class 600
Class 900
Class 1500
Class 2500
-20 to 100
285
740
985
1480
2220
3705
6170
200
260
680
905
1360
2035
3395
5655
300
230
655
870
1310
1965
3270
5450
400
200
635
845
1265
1900
3170
5280
500
170
605
805
1205
1810
3015
5025
600
140
570
755
1135
1705
2840
4730
650
125
550
730
1100
1650
2745
4575
700
110
530
710
1060
1590
2655
4425
750
95
505
675
1015
1520
2535
4230
800
80
410
550
825
1235
2055
3430
850
65
320
425
640
955
1595
2655
900
50
230
305
460
690
1150
1915
950
35
135
185
275
410
685
1145
1000
20
85
115
170
255
430
715

ASTM A105 150 Flange Dimensions

(NPS) Nominal Pipe Size (OD) Minimum Thickness
(T)		 RF Diameter
(R)		 Number of Bolt Holes Holes Diameter Circle Of Bolt
(BC)		 So Bore Inside Daimeter
(SB)		 Diameter Hub Base
(HB)		 Diameter Hub Top
(HT)		 SO LTH
(SL)		 WN LTH
(WL)		 * WN Bore Inside Daimeter
(WB)
1⁄2 4.75 0.88 1.38 4 0.88 3.25 0.88 1.50 0.84 1.25 2.38 *
3⁄4 5.12 1.00 1.69 4 0.88 3.50 1.09 1.75 1.05 1.38 2.75 *
1 5.88 1.12 2.00 4 1.00 4.00 1.36 2.06 1.32 1.62 2.88 *
11⁄4 6.25 1.12 2.50 4 1.00 4.38 1.70 2.50 1.66 1.62 2.88 *
11⁄2 7.00 1.25 2.88 4 1.12 4.88 1.95 2.75 1.90 1.75 3.25 *
2 8.50 1.50 3.63 8 1.00 6.50 2.44 4.12 2.38 2.25 4.00 *
21⁄2 9.62 1.62 4.13 8 1.12 7.50 2.94 4.88 2.88 2.50 4.12 *
3 10.50 1.88 5.00 8 1.25 8.00 – 5.25 3.50 – 4.62 *
4 12.25 2.12 6.19 8 1.38 9.50 – 6.38 4.50 – 4.88 *
5 14.75 2.88 7.31 8 1.63 11.50 – 7.75 5.56 – 6.12 *
6 15.50 3.25 8.50 12 1.50 12.50 – 9.00 6.63 – 6.75 *
8 19.00 3.62 10.63 12 1.75 15.50 – 11.50 8.63 – 8.38 *
10 23.00 4.25 12.75 12 2.00 19.00 – 14.50 10.75 – 10.00 *
12 26.50 4.88 15.00 16 2.12 22.50 – 17.75 12.75 – 11.12 *
14 29.50 5.25 16.25 16 2.38 25.00 – 19.50 14.00 – 11.75 *
16 32.50 5.75 18.50 16 2.63 27.75 – 21.75 16.00 – 12.25 *
18 36.00 6.38 21.00 16 2.88 30.50 – 23.50 18.00 – 12.88 *
20 38.75 7.00 23.00 16 3.12 32.75 – 25.25 20.00 – 14.00 *
24 46.00 8.00 27.25 16 3.63 39.00 – 30.00 24.00 – 16.00 *

ASTM A105 Class 300 Flange Dimensions

(NPS) Nominal Pipe Size(OD) Minimum Thickness
(T)		 RF Diameter
(R)		 Number of Bolt Holes Holes Diameter Circle Of Bolt
(BC)		 SO Bore Inside Daimeter
(SB)		 WN Bore Inside Daimeter
(WB)		 Diameter Hub Base
(HB)		 Diameter Hub Top
(HT)		 SO LTH
(SL)		 WN LTH
(WL)
1⁄2 3.75 0.50 1.38 4 0.63 2.62 0.88 0.62 1.50 0.84 0.81 2.00
3⁄4 4.62 0.56 1.69 4 0.75 3.25 1.09 0.82 1.88 1.05 0.94 2.19
1 4.88 0.62 2.00 4 0.75 3.50 1.36 1.05 2.12 1.32 1.00 2.38
11⁄4 5.25 0.69 2.50 4 0.75 3.88 1.70 1.38 2.50 1.66 1.00 2.50
11⁄2 6.12 0.75 2.88 4 0.88 4.50 1.95 1.61 2.75 1.90 1.13 2.63
2 6.50 0.81 3.62 8 0.75 5.00 2.44 2.07 3.31 2.38 1.25 2.69
21⁄2 7.50 0.94 4.12 8 0.88 5.88 2.94 2.47 3.94 2.88 1.44 2.94
3 8.25 1.06 5.00 8 0.88 6.62 3.57 3.07 4.62 3.50 1.63 3.06
31⁄2 9.00 1.12 5.50 8 0.88 7.25 4.07 3.55 5.25 4.00 1.69 3.13
4 10.00 1.19 6.19 8 0.88 7.88 4.57 4.03 5.75 4.50 1.82 3.32
5 11.00 1.31 7.31 8 0.88 9.25 5.66 5.05 7.00 5.56 1.94 3.82
6 12.50 1.38 8.50 12 0.88 10.62 6.72 6.07 8.12 6.63 2.00 3.82
8 15.00 1.56 10.62 12 1.00 13.00 8.72 7.98 10.25 8.63 2.38 4.32
10 17.50 1.81 12.75 16 1.12 15.25 10.88 10.02 12.62 10.75 2.56 4.56
12 20.50 1.94 15.00 16 1.25 17.75 12.88 12.00 14.75 12.75 2.82 5.06
14 23.00 2.06 16.25 20 1.25 20.25 14.14 13.25 16.75 14.00 2.94 5.56
16 25.50 2.19 18.50 20 1.38 22.50 16.16 15.25 19.00 16.00 3.19 5.69
18 28.00 2.31 21.00 24 1.38 24.75 18.18 17.25 21.00 18.00 3.44 6.19
20 30.50 2.44 23.12 24 1.38 27.00 20.20 19.25 23.12 20.00 3.69 6.32
22 33.00 2.57 25.25 24 1.63 29.25 22.22 21.25 25.25 22.00 3.93 6.43
24 36.00 2.69 27.62 24 1.63 32.00 24.25 23.25 27.62 24.00 4.13 6.56

ASTM A105 Weld Neck Flange Dimensions

NPS Size in Inch NPS Size in mm (O.D.) Outer Diameter Thickness Of Flange Hub Outer Diameter Weld Neck Outer Diameter Length Of Welding Neck Bore Diameter Of RF Height Of RF PCD Weld Face
A B C D E F G H I J
1/2 15 90 9.6 30 21.3 46 - 34.9 2 60.3 1.6
3/4 20 100 11.2 38 26.7 51 42.9 2 69.9 1.6
1 25 110 12.7 49 33.4 54 50.8 2 79.4 1.6
1 1/4 32 115 14.3 59 42.2 56 63.5 2 88.9 1.6
1 1/2 40 125 15.9 65 48.3 60 73 2 98.4 1.6
2 50 150 17.5 78 60.3 62 92.1 2 120.7 1.6
2 1/2 65 180 20.7 90 73 68 104.8 2 139.7 1.6
3 80 190 22.3 108 88.9 68 127 2 152.4 1.6
3 1/2 90 215 22.3 122 101.6 70 139.7 2 177.8 1.6
4 100 230 22.3 135 114.3 75 157.2 2 190.5 1.6
5 125 255 22.3 164 141.3 87 185.7 2 215.9 1.6
6 150 280 23.9 192 168.3 87 215.9 2 241.3 1.6
8 200 345 27 246 219.1 100 269.9 2 298.5 1.6
10 250 405 28.6 305 273 100 323.8 2 362 1.6
12 300 485 30.2 365 323.8 113 381 2 431.8 1.6
14 350 535 33.4 400 355.6 125 412.8 2 476.3 1.6
16 400 595 35 457 406.4 125 469.9 2 539.8 1.6
18 450 635 38.1 505 457.2 138 533.4 2 577.9 1.6
20 500 700 41.3 559 508 143 584.2 2 635 1.6
24 600 815 46.1 663 610 151 692.2 2 749.3 1.6

ASTM A105 Slip On Flange Dimensions

Normal Pipe Size Of Flanges (I.D.) Inside Diameter Outside Daimeter (O.D.) Circle Of Bolt (BC) Raised Face
(R)		 Raised Face
(RF)		 H Thickness Of Raised Face
(T)		 T1 Thickness Of Flat Face
(T2)		 Hole Of Bolt
(B)		 Number of
Bolt Holes
1/2 0.88 3.50 2.38 1.38 .063 1.19 .62 .38 .56 .62 4
3/4 1.09 3.88 2.75 1.69 .063 1.50 .62 .44 .56 .62 4
1 1.36 4.25 3.12 2.00 .063 1.94 .69 .50 .63 .62 4
1-1/4 1.70 4.62 3.50 2.50 .063 2.31 .81 .56 .75 .62 4
1-1/2 1.97 5.00 3.88 2.88 .063 2.56 .88 .62 .82 .62 4
2 2.44 6.00 4.75 3.62 .063 3.06 1.00 .69 .94 .75 4
2-1/2 2.94 7.00 5.50 4.12 .063 3.56 1.12 .82 1.06 .75 4
3 3.57 7.50 6.00 5.00 .063 4.25 1.19 .88 1.13 .75 4
3-1/2 4.07 8.50 7.00 5.50 .063 4.81 1.25 .88 1.19 .75 8
4 4.57 9.00 7.50 6.19 .063 5.31 1.31 .88 1.25 .75 8
5 5.66 10.00 8.50 7.31 .063 6.44 1.44 .88 1.38 .88 8
6 6.72 11.00 9.50 8.50 .063 7.56 1.56 .94 1.50 .88 8
8 8.72 13.50 11.75 10.62 .063 9.69 1.75 1.06 1.69 .88 8
10 10.88 16.00 14.25 12.75 .063 12.00 1.94 1.13 1.88 1.00 12
12 12.88 19.00 17.00 15.00 .063 14.38 2.19 1.19 2.13 1.00 12
14 14.14 21.00 18.75 16.25 .063 15.75 2.25 1.32 2.19 1.12 12
16 16.16 23.50 21.25 18.50 .063 18.00 2.50 1.38 2.44 1.12 16
18 18.18 25.00 22.75 21.00 .063 19.88 2.69 1.50 2.63 1.25 16
20 20.20 27.50 25.00 23.00 .063 22.00 2.88 1.63 2.83 1.25 20
22 22.22 29.50 27.25 25.25 .063 24.25 3.13 1.75 3.07 1.38 20
24 24.25 32.00 29.50 27.25 .063 26.12 3.25 1.82 3.19 1.38 20

SA105 Blind Flange Dimensions

NPS (Normal Pipe Sizes) "A"
(O.D.) Outside Daimeter		 "B"
(Thickness)		 "C"
(RF Daimeter)		 "D"
(B.C.D.)		 # Bolt
Holes		 Daimeter of
Bolt Holes		 Approx.
Weight In Kg
1/2" 3-1/2 7/16 1-3/8 2-3/8 4 5/8 2
3/4" 3-7/8 1/2 1-11/16 2-3/4 4 5/8 2
1" 4-1/4 9/16 2 3-1/8 4 5/8 2
1-1/4" 4-5/8 5/8 2-1/2 3-1/2 4 5/8 3
1-1/2" 5 11/16 2-7/8 3-7/8 4 5/8 3
2" 6 3/4 3-5/8 4-3/4 4 3/4 4
2-1/2" 7 7/8 4-1/8 5-1/2 4 3/4 7
3" 7-1/2 15/16 5 6 4 3/4 9
3-1/2" 8-1/2 15/16 5-1/2 7 8 3/4 13
4" 9 15/16 6-3/16 7-1/2 8 3/4 17
5" 10 15/16 7-5/16 8-1/2 8 7/8 20
6" 11 1 8-1/2 9-1/2 8 7/8 27
8" 13-1/2 1-1/8 10-5/8 11-3/4 8 7/8 47
10" 16 1-3/16 12-3/4 14-1/4 12 1 67
12" 19 1-1/4 15 17 12 1 123
14" 21 1-3/8 16-1/4 18-3/4 12 1-1/8 139
16" 23-1/2 1-7/16 18-1/2 21-1/4 16 1-1/8 187
18" 25 1-9/16 21 22-3/4 16 1-1/4 217
20" 27-1/2 1-11/16 23 25 20 1-1/4 283
24" 32 1-7/8 27-1/4 29-1/2 20 1-3/8 415

ASTM A105 Heat Treatment

Heat treatment is not a mandatory requirement of ANSI A105 Flanges piping components. However, there are some exceptions: ASME B16.5 flanges 150 Class, Class 400, Class 900, Class 1500, Class 2500; Flanges of special design where the design pressure at the design temperature exceeds the pressure-temperature ratings of Class 300; Flanges of special design where the design pressure or temperature are not known; Forged fittings or valve parts which are over 4″ and Class 300 RF.

What Is The Difference Between A105 And A105N

  • ASTM A105 Material by default is not normalization heat treated. A105 Flanges are called the Ansi A105n Flanges where the n stands for normalization heat treatment. The heat treatment makes the A105 much harder and stronger.

  • A105N Flange can be used to fit pipes of two different diameters. One end of the flange corresponds to the diameter of one pipe and the other end of the reducing flange corresponds to the diameter of the other pipe in the connection.

What Is The Difference Between A105 And A234

    • A105 Flange cannot be used in extreme conditions because of the carbon steel material. They can stand up to certain levels but not overtake the high chromium molybdenum alloy counterparts of them.

    • A234 WPB are made up of wrought carbon steel that they are very strong and can be applied in high strength requirements. The A234 are heat treated and then allowed to cool rapidly.

Special Price For Type Of ASTM A105 Carbon Steel Flanges

CS Forged Flanges

ASME SA105 Carbon Steel Raised Face Flanges

Carbon Steel ASTM a105n Male and Female Flanges

ASTM a105n Bleed Ring

Carbon Steel ASTM A105 Plate Flanges

ASTM A105 Ring Type Joint Flanges

A105 Carbon Steel Tongue & Groove Flanges

ASTM A105 Reducing Flanges

ASTM a105 Carbon Steel Slip On Flanges

ASTM A105 Socket Weld Flanges

ASTM a105 Carbon Steel Blind Flanges

Carbon Steel sa105 Weld Neck Flanges

Carbon Steel ASME sa105 Threaded/ Screwed Flanges

ASTM A105n Lap Joint Flanges

Carbon Steel ASTM A105 Long Weld Neck Flanges

Carbon Steel ASTM A105N Spectacle Blind Flanges

Carbon Steel Square Flange

ASTM A105n High hub Blind Flange

Carbon Steel ASTM A105 Orifice Flanges

Carbon Steel ASTM A105N Puddle Flange

Carbon Steel ASME SA105 Expander Flange

Carbon Steel ASTM A105 Flat Flange

Carbon Steel ASTM A105 Flange Gasket

Carbon Steel ASTM A105N Hydraulic Sae Flanges

ASTM A105n Flange Adapter

Carbon Steel ASTM A105N Anchor Flange

We Have Recently Delivered ASTM A105 Carbon Steel Flanges To The Following Countries:

3 Inch, SCH 120, RF, BS EN 10204, Carbon Steel Flanges Philippines, Canada, Malaysia, Singapore
Class 600, 6 Inch, RF, ASME B16.5, astm a105 flange Romania, Europe, Japan, Malaysia
Class 300, 6 Inch, BS 10, Sch 80, A105 Pipe Flange China, Colombia, Sweden, Malaysia
10 Inch, SCH 20, LTCS, Class 2500, carbon steel slip-on flanges Europe, UAE, United Kingdom -UK, Malaysia
4 Inch Class 150, RF, BS 3293, carbon steel blind flanges Kuwait, Brazil, Saudi Arabia (KSA), South Africa
Class 150, 6 Inch, BS 3293, Raised Face, cs flanges Bahrain, South Africa, Singapore
3 Inch, 300#, SCH 40, B16.5, FF, black steel flanges Australia, Philippines, UK, Nigeria
ASTM A105N, 11 Inch, FF, 150 LB, Carbon Steel A105 Blind Flange Hong Kong, Oman, UAE, Malaysia
12 Inch, Class 150, SCH 60, Carbon Steel Pipe Flanges Iran, Chile, Singapore, Italy
Class 600, RF, 30 Inch, SCH 40, Carbon Steel Forged Flanges Norway, Turkey, United Arab Emirates (UAE), Malaysia
16 Inch, 150LB, RF, A105N Flange Belgium, Philippines, Dammam -KSA, Indonesia.
20 Inch, Class 300, SCH STD, B16.5, Carbon Steel Weld Flanges France, Qatar, Thailand, Europe
2 Inch, SCH 160, B16.5, CL1500, Blacl Steel SORF Flanges Germany, Czechia, Malaysia, Thailand
8 Inch, RF, Class 150, Dual Rated, astm a105n material Bangladesh, Finland, USA, Malaysia
16 Inch, 600#, API 590, Flate Face (FF), Carbon Steel Pipe Flange Dubai, Netherlands, Russia, Malaysia
ASTM A105N, 8 Inch, Class 300, SCh 60, A105 Wnrf Flanges Mexico, Egypt, UK, Spain
14 Inch, Class 900, ANSI B16.5, FF, CS Flanges Poland, Canada, UK, Ellington -United States