Carbon Steel A105 Flanges

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Thabiso Steel, a reputable manufacturer and supplier located in Cape Town, South Africa, specializes in high-quality **Carbon Steel A105 Flanges** designed for durability, strength, and reliable performance in high-pressure and high-temperature settings. These flanges are crafted to meet international standards, ensuring precision, consistency, and long-lasting operational efficiency. Thabiso Steel caters to various industries, including oil and gas, petrochemical, power generation, and construction, delivering products that blend structural integrity with corrosion resistance. With a strong commitment to quality and customer satisfaction, Thabiso Steel has positioned itself as a top supplier of carbon steel flanges, offering dependable solutions for essential piping and industrial systems.

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ASTM A105 Carbon Steel RTJ Flanges

Carbon Steel A105 Forged Flanges

Carbon Steel A105 Flat Face Flanges

Table of Contents

What is Carbon Steel A105 Flanges?

**Carbon Steel A105 Flanges** are mainly made up of carbon, manganese, phosphorus, sulfur, and silicon, along with controlled alloying elements that boost their mechanical performance. They showcase impressive tensile and yield strength, exceptional hardness, and high impact resistance. These flanges also provide good ductility, weldability, and toughness, ensuring they perform reliably under high-pressure and high-temperature conditions. These mechanical attributes make A105 flanges perfect for piping systems, pressure vessels, and structural applications that demand durability, strength, and consistent performance in challenging industrial environments.

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Carbon Steel Flanges in South Africa

Carbon Steel A105 Flanges Specification

Specs ASTM A105/ ASME SA105
Pressure Classes Cl 150, Class 300, Cl. 400, 600, Class 900, Cl 1500 and 2500
Standards ASME | BS | DIN | ANSI | GOST | EN Flange
Size Ranges From 1/2 inch (i.e. 15 NB) upto 48 inch (i.e. 1200NB)
Flange Face Type FF, RF, LMF, SMF, RTJ, LJF.
JIS Standards 5 K, 10K, 16K, 20 K, 30K, 40K, 63 K
UNI/ DIN / EN Standard 6Bar, 10 Bar, 16Bar, 25 Bar, 40Bar

Carbon Steel 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 Mechanical Properties

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

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Top Manufacturer and Supplier of Carbon Steel A105 Flanges in Cape Town, South Africa​

ThabisoSteel is one of the most prominent manufacturers and suppliers of superior quality Carbon Steel A105 Flanges in Cape Town, South Africa. As experts in steel solutions, we supply a complete spectrum of products like Carbon Steel, Alloy Steel, Mild Steel, and Galvanized Steel. Our product range comprises Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets, and Plates. Known for our reliable delivery and first-rate customer service, we are committed to supplying high-quality steel materials that guarantee durability and excellent performance in numerous industrial applications. 

ANSI A105 Flanges Pressure Rating

ASTM A105 Flange Weights by Pressure Class and Size
Pipe Size Class 150 Class 300 Class 600 Class 900 Class 1500 Class 2500
WN SO BLD WN SO BLD WN SO BLD WN SO BLD WN SO BLD WN SO BLD
1/2″ 2 1 1 2 1 1 2 2 2 1500 Class Weight 5 4 4 7 7 7
3/4″ 2 2 2 3 3 3 4 3 3 1500 Class Weight 6 5 6 8 8 8
1″ 3 2 2 4 3 3 4 4 4 1500 Class Weight 9 8 8 12 11 11
1 1/2″ 4 3 3 7 6 6 8 7 8 1500 Class Weight 13 12 13 25 22 23
2″ 6 5 5 9 7 8 12 9 10 1500 Class Weight 25 25 25 42 37 39
2 1/2″ 8 7 7 12 10 12 18 13 15 1500 Class Weight 36 36 35 52 55 56
3″ 10 8 9 15 13 16 23 16 20 31 26 29 48 48 48 94 83 86
4″ 15 13 17 25 22 27 42 37 41 53 53 54 73 73 73 145 125 130
5″ 19 15 20 32 28 35 68 63 68 86 83 87 130 130 140 245 210 225
6″ 24 19 26 42 39 50 81 80 86 110 110 115 165 165 160 380 325 345
8″ 39 30 45 67 58 81 120 115 140 175 170 200 275 260 300 580 485 530
10″ 52 43 70 91 81 124 190 170 230 260 245 290 455 435 510 1075 930 1025
12″ 80 64 110 140 115 185 225 200 295 325 325 415 690 580 690 1525 1100 1300
14″ 110 90 140 180 165 250 280 230 355 400 400 520 940 NA 975 NA NA NA
16″ 140 98 180 250 190 295 390 330 495 495 425 600 1250 NA 1300 NA NA NA
18″ 150 130 220 320 250 395 475 400 630 680 600 850 1625 NA 1750 NA NA NA
20″ 180 165 285 400 315 505 590 510 810 830 730 1075 2050 NA 2225 NA NA NA
22″ 225 185 355 465 370 640 720 590 1000 NA NA NA NA NA NA NA NA NA
24″ 260 220 430 580 475 790 830 730 1250 1500 1400 2025 3325 NA 3625 NA NA NA

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Types of Carbon Steel A105 Flanges

ASTM A105 CS Threaded Flanges
A105 Carbon Steel Spectacle Flanges
ANSI A105 Carbon Steel Socket Weld Flanges
A105 Carbon Steel Blind Flanges
CS A105 Slip On Flanges
Carbon Steel A105 Weld Neck Flanges

ASTM A105 Flange Weight Chart

Size in inches Outer Dia. Size in millimeter RF Height Flange Thick. RF Diam. PCD Bolt Size UNC No of Bolts Machine Bolt Lengths Hole Size RF Stud Length ISO Stud Size Weight in kg
  A   D B C E              
1/2 90 15 2 9.6 34.9 60.3 1/2 4 50 5/8 55 M14 0.9
3/4 100 20 2 11.2 42.9 69.9 1/2 4 50 5/8 65 M14 0.9
1 110 25 2 12.7 50.8 79.4 1/2 4 55 5/8 65 M14 0.9
1 1/4 115 32 2 14.3 63.5 88.9 1/2 4 55 5/8 70 M14 1.4
1 1/2 125 40 2 15.9 73 98.4 1/2 4 65 5/8 70 M14 1.8
2 150 50 2 17.5 92.1 120.7 5/8 4 70 3/4 85 M16 2.3
2 1/2 180 65 2 20.7 104.8 139.7 5/8 4 75 3/4 90 M16 3.2
3 190 80 2 22.3 127 152.4 5/8 4 75 3/4 90 M16 4.1
3 1/2 215 90 2 22.3 139.7 177.8 5/8 8 75 3/4 90 M16 5.9
4 230 100 2 22.3 157.2 190.5 5/8 8 75 3/4 90 M16 7.7
5 255 125 2 22.3 185.7 215.9 3/4 8 85 7/8 95 M20 9.1
6 280 150 2 23.9 215.9 241.3 3/4 8 85 7/8 100 M20 11.8
8 345 200 2 27 269.9 298.5 3/4 8 90 7/8 110 M20 20.5
10 405 250 2 28.6 323.8 362 7/8 12 100 1 115 M24 32
12 485 300 2 30.2 381 431.8 7/8 12 100 1 120 M24 50
14 535 350 2 33.4 412.8 476.3 1 12 115 1 1/8 135 M27 64
16 595 400 2 35 469.9 539.8 1 16 115 1 1/8 135 M27 82
18 635 450 2 38.1 533.4 577.9 1 1/8 16 125 1 1/4 145 M30 100
20 700 500 2 41.3 584.2 635 1 1/8 20 140 1 1/4 160 M30 130
24 815 600 2 46.1 692.2 749.3 1 1/4 20 150 1 3/8 170 M33 196

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Uses of Carbon Steel A105 Flanges

**Carbon Steel A105 Flanges** are extensively used in industries that require secure and robust piping connections. They’re commonly found in oil and gas pipelines, refineries, chemical plants, power generation facilities, and steam distribution systems. Additionally, they play a vital role in boiler assemblies, heat exchangers, and petrochemical installations where safety and operational reliability are paramount. Their blend of mechanical strength, corrosion resistance, and precise dimensions guarantees long-term performance, making them an excellent choice for connecting pipes, valves, and equipment in high-pressure applications.

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