Low Temperature Carbon Steel LF1 Flanges

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Thabiso Steel stands out as a top-notch manufacturer and supplier located in Cape Town, South Africa, with a focus on high-quality Low Temperature Carbon Steel LF1 Flanges. These flanges are designed to perform reliably in cold environments, boasting impressive strength, toughness, and durability even in low-temperature conditions. Thabiso Steel takes pride in delivering precision-engineered steel products that adhere to international standards, ensuring safety, longevity, and consistent quality. With a strong commitment to technical excellence and customer satisfaction, Thabiso Steel provides robust and efficient LF1 flanges that are essential for critical piping systems, offering cost-effective, high-performance solutions for industries that operate in challenging low-temperature and high-pressure settings.

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LTCS LF1 Blind Flanges

Low Temperature Carbon Steel LF1 Forged Flanges

Carbon Steel LF1 Threaded Flanges

Table of Contents

What is Low Temperature Carbon Steel LF1 Flanges?

Low Temperature Carbon Steel LF1 Flanges are made from carbon steel that contains carefully controlled amounts of manganese, phosphorus, sulfur, and silicon. This specific composition guarantees outstanding mechanical properties, such as high tensile and yield strength, excellent impact toughness, and resistance to brittle fractures at low temperatures. Additionally, LF1 flanges are known for their good weldability and machinability, which allows for precise fabrication. The steel’s perfect balance of strength and ductility ensures reliable performance in cold, high-pressure applications, making LF1 flanges the go-to choice for demanding industrial piping systems where durability and safety are paramount.

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Carbon Steel Flanges in South Africa

Low Temperature Carbon Steel LF1 Flanges Specification

Low Temperature Carbon Steel LF1 Flanges Chemical Composition

Element Weight %
Carbon 0.08 – 0.15
Silicon 0.15 – 0.50
Manganese 0.30 – 0.60
Phosphorus 0.025 max *
Sulfur 0.025 max *
Molybdenum 0.90 – 1.10
Chromium 2.00 – 2.50
Nickel 0.5 max

LTCS LF1 Flanges Mechanical Properties

Property Values
Ultimate Tensile Strength * 95 min Ksi (655 Mpa)
0.2 % Yield Strength * 75 min Ksi (517 Mpa)
Elongation * 17 % min
Reduction of Area * 35 % min
Charpy Impact Toughness 42 mean/ 33 min J at –18o C
Hardness 197 – 237 BHN (75 Ksi min)

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Top Manufacturer and Supplier of Low Temperature Carbon Steel LF1 Flanges in Cape Town, South Africa

ThabisoSteel is one of the most prominent manufacturers and suppliers of superior quality Low Temperature Carbon Steel LF1 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. 

A350 LF1 Pressure Rating Chart

TEMP
°C
Class 150 Class 300 Class 400 Class 600 Class 900 Class 1500 Class 2500
-29 TO 38 19.6 51.1 68.1 102.1 153.2 255.3 425.5
50 19.2 50.1 66.8 100.2 150.4 250.6 417.7
100 17.7 46.6 62.1 93.2 139.8 233 388.3
150 15.8 45.1 60.1 90.2 135.2 225.4 375.6
200 13.8 43.8 58.4 87.6 131.4 219 365
250 12.1 41.9 55.9 83.9 125.8 209.7 349.5
300 10.2 39.8 53.1 79.6 119.5 199.1 331.8
325 9.3 38.7 51.6 77.4 116.1 193.6 322.6
350 8.4 37.6 50.1 75.1 112.7 187.8 313
375 7.4 36.4 48.5 72.7 109.1 181.8 303.1
400 6.5 34.7 46.3 69.4 104.2 173.6 289.3
425 5.5 28.8 38.4 57.5 86.3 143.8 239.7
450 4.6 23 30.7 46 69 115 191.7
475 3.7 17.4 23.2 34.9 52.3 87.2 145.3
500 2.8 11.8 15.7 23.5 35.3 58.8 97.9
538 1.4 5.9 7.9 11.8 17.7 29.5 49.2

Low Temperature Carbon Steel LF1 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.lf2 18.00 1/2 1-15/16
lf2 27-1/2 1-11/16 23 22 5-11/16 2-7/8 4-1/16 lf2.lf2 lf2.25 lf2.00 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

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Types of Low Temperature Carbon Steel LF1 Flanges

Carbon Steel LF1 Lap Joint Flanges
Low Temperature Carbon Steel LF1 Spectacle Blind Flanges
LF1 Carbon Steel Socket weld Flanges
Carbon Steel LF1 Long Weld Neck Flanges
Carbon Steel LF1 Slip On Flanges
LF1 Carbon Steel Weld Neck Flanges

Carbon Steel LF1 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
3 3 3 3 3 3
3 3 3 3 4 4
2 5 5 5 5 5 6
8 8 8 8 7 10
3 9 9 9 9 9 11.5
11 12 11 11 13 12
4 13 13 13 13 17 16.5
5 15 15 15 15 lf2 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 2lf2 165
lf2 165 165 165 195 285 197
22 185 185 185 245 355 225
24 2lf2 2lf2 2lf2 275 430 268

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Uses of Low Temperature Carbon Steel LF1 Flanges

These LF1 Flanges are widely utilized in industries that require secure and durable piping connections in low-temperature environments. They are particularly suited for oil and gas pipelines, chemical processing plants, cryogenic systems, and refrigeration applications. LF1 flanges also find their place in power plants, petrochemical facilities, and industrial fluid transport systems where high strength and resistance to low-temperature brittleness are crucial. Thabiso Steel’s LF1 Flanges promise long-lasting performance, operational reliability, and lower maintenance costs, ensuring safe and efficient connections.

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