CIRCULAR HOLLOW SECTION

Circular Hollow Section

Circular Hollow Section (CHS) Steel pipe, also known as round steel tubes, is a type of steel section that is utilized in a number of shapes across numerous sectors.

The most often used material for a circular hollow section is hot rolled coils. Slitting the coils to the appropriate width for the produced portion and then shaping them to the final form required. Following size formation and seam welding, the tube is cut to the necessary length to make a single piece of pipe.

Circular Hollow Sections are lightweight materials with high tensile strength. The parts are flexible and excellent for welding, allowing for the creation of unique and visually pleasing structures without sacrificing strength, beauty, or durability. With yield strengths of 210 MPa, 310 MPa, 355 MPa, and 420 MPa, these hollow sections or steel tubes can easily support enormous loads. Unlike other secondary steel parts, steel’s chemical composition prevents the development of fractures during welding. As a result, it is more appropriate for use in high-quality steel construction that saves both money and time.

PRODUCT FEATURES

Dimension and Sizes of Circular Hollow Section (CHS)

DN

O. D.

W. T.

Inch

mm

SCH5S

SCH10S

SCH10

SCH20

SCH30

SCH40

SCH60

SCH80

SCH100

SCH120

SCH140

SCH160

STD

XS

XXS

50

2″

60.3

1.65

2.77

3.91

5.54

8.74

3.91

5.54

11.07

65

2 1/2″

73

2.11

3.05

5.16

7.01

9.53

5.16

7.01

14.02

80

3″

88.9

2.11

3.05

5.49

7.62

11.13

5.49

7.52

15.24

90

3 1/2″

101.6

2.11

3.05

5.74

8.08

5.74

8.08

100

4″

114.3

2.11

3.05

6.02

8.58

11.13

13.49

6.02

8.56

17.12

125

5″

141.3

2.77

3.4

6.55

9.53

12.7

15.88

6.55

9.53

18.05

150

6″

168.3

2.77

3.4

7.11

10.97

14.27

18.26

7.11

10.97

21.95

200

8″

219.1

2.77

3.76

6.35

7.04

8.18

10.31

12.7

15.09

18.26

20.62

23.01

8.18

12.7

22.23

250

10″

273.1

3.4

4.19

6.35

7.8

9.27

12.7

15.09

18.26

21.44

25.4

28.58

9.27

12.7

25.4

300

12″

323.9

3.96

4.57

6.35

8.38

10.31

14.27

17.48

21.44

25.4

28.58

33.32

9.53

12.7

25.4

350

14″

355.5

3.96

4.78

6.35

7.92

9.53

11.13

15.09

19.05

23.83

27.79

31.75

35.71

9.53

12.7

400

16″

406.4

4.19

4.78

6.35

7.92

9.53

12.7

16.66

21.44

26.19

30.96

36.53

40.49

9.53

12.7

450

18″

457.2

4.19

4.78

6.35

7.92

11.13

14.27

19.05

23.83

39.36

34.93

39.67

45.24

500

20″

508

4.78

5.54

6.35

9.53

12.7

15.09

20.62

26.19

32.54

38.1

44.45

50.01

550

22″

558.8

4.78

5.54

6.35

9.53

12.7

22.23

28.58

34.93

41.28

47.63

53.98

600

24″

609.6

5.54

6.35

6.35

9.53

14.27

17.48

24.61

30.96

38.89

46.02

52.37

59.54

Material Component Properties of Circular Hollow Section (CHS)

Chemical Requirements

 

Element

Composition, %

Grades A, B, and D

Grade C

Heat Analysis

Product Analysis

Heat Analysis

Product Analysis

Carbon, max A

0.26

0.30

0.23

0.27

Manganese, max A

1.35

1.40

1.35

1.40

Phosphorus, max

0.035

0.045

0.035

0.045

Sulfur, max

0.035

0.045

0.035

0.045

Copper, min B

0.20

0.18

0.20

0.18

Mechanical Properties of Circular Hollow Section (CHS)

Item

Grade A

Grade B

Grade C

Grade D

Tensile strength, mn, ps (MPa)

45 000
(310)

58 000
(400)

62 00
(427)

58 000
(400)

Yield strength, mn, psi (MPa)

33 000
(228)

42 000
(290)

46 000
(317)

36 000
(250)

Elongation in 2 in. (50.8 mm), min, %A

25B

23C

21D

23C

Advantages of Using Circular Hollow Section

The ability to reinforce and beautify steel structures is one of the benefits of using circular structural pipes (Circular Hollow Structural Sections). Circular Hollow Section has several advantages over W-beams in construction and structural applications, ranging from cost savings to increased flexibility:

- Cost Saving

In any construction project, cost control is essential. Significant weight savings are realized when structural pipe (Hollow Structural Sections) is used, which translates to significant material cost savings. To put it another way, less steel is required to complete the same task. When the structural pipe is used to support a given load, less steel is required, resulting in material cost savings. Finally, when you specify unpainted weathering steel with structural pipe, you get a double dose of cost savings during construction as well as additional life cycle cost savings due to the extremely low ongoing maintenance costs compared to a painted structure. Transportation, handling, and erection costs are also reduced when less weight is involved.

- Availability

Weathering (ASTM A847) and non-weathering (ASTM A500 and 1085) structural pipe is readily available from a variety of steel distributors and may be easier to source for your project than W-Beams.

- Simplicity

Because there are so many different sizes of W-beams, choosing the right one for your application can be difficult. In the structural pipe, only 40-60 square and rectangular tube sizes are available. Square and rectangular tubing, as well as structural pipe, have straight sides that make fabrication easier.

- Attractiveness and Versatility

Architects, engineers, and contractors benefit from weathering steel HSS’s increased aesthetic appeal and flexibility. Weathering steel is a versatile and long-lasting material. In addition, the patina that weathered steel acquires over time blends well with stone, wood, plants, and other outdoor elements.

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