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ASTM A105 Flanges, ASTM A105 Carbon Steel slip on Flanges Supplier, A105N Flanges, ASME SA105 Flanges, Carbon Steel A105 Socket Weld Flanges, CS A105 Flanges Manufacturer in India.

ASTM A105 Flange Specification


Specification: ASTM A105 / ASME SA105, A105N

Size: 1/2" (15 NB) to 48" (1200NB) DN10~DN5000

Schedule: SCH10, SCH 40, SCH 80, SCH 160 To SCH XXS

Dimension Standard: ANSI/ASME B16.5, B 16.47 Series A & B,

B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Type: Ring Joint Flange (RTJ), Flat Face Flange (FF),

Raised Face Flange (RF), Male and Female Flange (M & F),

Lap Joint Flange, Large and Small Tongue-and-Groove Flange (T & G)

Pressure rating: 150#, 300#, 600#, 900#, 1500#, 2500#,

PN6, PN10, PN16, PN25, PN40, PN64 etc.


ASTM A105 carbon steel flanges are extremely popular in many industries, given their top-notch qualities and multi-functionality. These flanges are crafted with carbon steel, an iron and carbon alloy. They are renowned for their durability, resilience to corrosion, and strength, allowing them to be viable for an array of employees.


Carbon steel ASTM A105 flanges are renowned for their impressive tensile strength. This characteristic benefits industrial sectors such as oil and gas, petrochemicals, and power generation, where these flanges can resist strong forces and challenging conditions. Additionally, because of their robust tensile strength, these flanges can handle sudden shifts in temperature and mechanical stress with no damage or disappointment.

ASTM A105 Flanges in Specification and Types Like A105 Weldneck Flange, A105 Blind Flange, A105 Socketweld Flange, A105 Slip On Flange, A105 Threaded Flange, A105 Laped Joint Flange, A105 Plate Flange, A105 WNRF Flange, A105 SORF Flange, ASTM A105 Carbon Steel Pipe Flanges, Carbon Steel A105 weld neck Flange, CS A105 Forged Flanges Manufacturer in India.


ASTM A105 flanges possess outstanding weldability, just as other forms of carbon steel. The fittings are quickly joined to pipes or other components through welding, allowing a reliable and airtight connection. Being able to weld carbon steel ASTM A105 flanges simplifies the installation process and reduces the requirement for extra connectors, thus saving time and money.


One of the prominent properties of carbon steel ASTM A105 flanges is their corrosion resistance. Carbon steel may not be corrosion-resistant in particular environments, while A105 flanges are purposely built to provide considerable corrosion resistance. These flanges can stay safe if exposed to moisture, chemicals, and destructive gases, hence their suitability in chemical plants or offshore oil rigs with high corrosion levels.


ASTM A105 Carbon Steel Flanges Specifications


Specifications ASTM A105 & ASME SA105, A105N
Size 1/2″ to 48″
Standards ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Dimensions ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Pressure Ratings Class 400, Class 150, Class 1500, Class 300, Class 900, Class 2500, Class 600
Flange Face Type Flate Face, Raised Face, Ring Type Joint
Coating/Surface Treatment Yellow Transparent, Oil Black Paint, Anti-rust Paint, Cold and Hot Dip Galvanized, Zinc Plated.

ASTM A105 flanges can withstand high temperatures without compromising their structural stability, making them ideal for use in environments with high-temperature fluids or steam, like those in power plants and pipelines carrying steam.


The strength, weldability, corrosion resistance, temperature endurance, and exactness of dimensions of ASTM A105 Carbon Steel flanges make them a sought-after choice for various industrial uses. From connecting pipes in the petroleum and gas industry to ensuring dependable seals in chemical plants, these flanges are created to ensure their performance and durability in challenging conditions.


ASTM A105 Carbon Steel Flanges are packaged in a solid wood crate or box to ensure safe transport and storage. The flanges are organised and fixed within the box to avoid any decline during handling or delivery. This packing method provides defence and an advantage for the customer.

Astm A105 Flange Weight


Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS4087 PN14 95 67 4 M12 14
AS 2129 Flange Table C 95 67 4 13 14
Table D 95 67 4 13 14
Table E 95 67 4 13 14
Table F 95 67 4 13 14
Table H 114 83 4 16 17
Table J 114 83 4 16 17
ASTM B16.5 ASTM 150 89 60 4 13 16
ASTM 300 95 67 4 13 16
ASTM 600 95 67 4 13 16
ASTM 900 121 83 4 19 22
ASTM 1500 121 83 4 19 22
ISO 7005 (DIN) Flange PN6 80 55 4 M10 11
PN10 95 65 4 M12 14
PN16 95 65 4 M12 14
PN20 90 60.5 4 M14 16
PN25 95 65 4 M12 14
PN40 95 65 4 M12 14

Astm A105 Weld Neck Flange Dimensions


Size in In Size in Millimeter (OD) Outer Diameter Flange Thick. Hub OD Weld Neck Outer Diameter Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 95 12.7 38 21.3 51 Refer Note 34.9 2 66.7 1.6
3/4 20 115 14.3 48 26.7 56 42.9 2 82.6 1.6
1 25 125 15.9 54 33.4 60 50.8 2 88.9 1.6
1 1/4 32 135 17.5 64 42.2 64 63.5 2 98.4 1.6
1 1/2 40 155 19.1 70 48.3 67 73 2 114.3 1.6
2 50 165 20.7 84 60.3 68 92.1 2 127 1.6
2 1/2 65 190 23.9 100 73 75 104.8 2 149.2 1.6
3 80 210 27 117 88.9 78 127 2 168.3 1.6
3 1/2 90 230 28.6 133 101.6 79 139.7 2 184.2 1.6
4 100 255 30.2 146 114.3 84 157.2 2 200 1.6
5 125 280 33.4 178 141.3 97 185.7 2 235 1.6
6 150 320 35 206 168.3 97 215.9 2 269.9 1.6
8 200 380 39.7 260 219.1 110 269.9 2 330.2 1.6
10 250 445 46.1 321 273 116 323.8 2 387.4 1.6
12 300 520 49.3 375 323.8 129 381 2 450.8 1.6
14 350 585 52.4 425 355.6 141 412.8 2 514.4 1.6
16 400 650 55.6 483 406.4 144 469.9 2 571.5 1.6
18 450 710 58.8 533 457 157 533.4 2 628.6 1.6
20 500 775 62 587 508 160 584.2 2 685.8 1.6
24 600 915 68.3 702 610 167 692.2 2 812.8 1.6

A105N Flange Physical Properties


Temperature (F°) 150 Class 300 Class 400 Class 600 Class 900 Class 1500 Class 2500 Class
-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 Flanges Chemical Composition


ELEMENT COMPOSITION, %
Carbon 0.35 max
Manganese 0.60-1.05
Phosphorus 0.035 max
Sulfur 0.040 max
Silicon 0.10-0.35
Copper 0.40 max (1)
Nickel 0.40 max (1)
Chromium 0.30 max (1-2)
Molybdenum 0.12 max (1-2)
Vanadium 0.08 max

A105N Flange 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
tdermal Conductivity 360
Mean Coeff tdermal Expansion 6.7
Modulus of Elasticity Tension 30
Modulus of Elasticity Torsion 11

Equivalent Grades Of ASME SA105n Flanges


Mechanical Properties Requirements
Tensile strength,min,psi [MPa] 70000 [485]
Yield strength,min,psi [MPa] 36000 [250]
Elongation, min, % 30
Reductionofarea,min,% 30
Hardness,HB,max 187

Grade A105 Carbon Steel Flange Dimensional Tolerance


Outside Diameter When O.D. is 24″ or less  ±1.6mm﹡
Inside Diameter 10″ and smaller  ±0.8mm
12″ thru 18″  ±1.6mm
20″ and larger  +3.2mm, -1.6mm
Outside Diameter of hub 5″ and smaller  +2.4mm, -0.8mm﹡
6″ and larger  +4.0mm, -0.8mm
Diameter of contact face 1/16″ rasied face tongue and groove male, female  ±0.8mm
1/4″ rasied face tongue and groove male, female  ±0.4mm
Diameter of hub at base when hub base is 24″ or smaller  ±1.6mm﹡
Diameter of hub at point of welding 5″ and smaller  +2.4mm, -0.8mm
6″ and larger  +4.0mm, -0.8mm
Drilling Bolt circle  ±1.6mm
Bolt hole spacing  ±0.8mm
Eccentricity of bolt circle with respect to facing 2 1/2″ and smaller: 0.8mm, max﹡
Eccentricity of bolt circle with respect to bore 3″ and larger: 1.6mm, max﹡
Thickness 18″ and smaller  +3.2mm, -0mm
20″ and larger  +4.8mm, -0mm
Length of thru hub 10″ and smaller  ±1.6mm
12″ and larger  ±3.2mm

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