Specifications and sizes of current steel pipes

Round steel pipes, also known as steel pipes, are indispensable materials in construction projects, whether large or small. Depending on each application, round steel pipes will have different sizes, thicknesses, and materials. Let’s immediately learn about the characteristics of round steel pipes in the article below.

Characteristics of steel pipes

As their name suggests, steel pipes have a cylindrical shape with good resistance, durability, and flexibility. At the same time, it is less susceptible to corrosion and rust, helping the project have a long lifespan. Steel pipes are used in a variety of applications, including:

• Steel pipes are used in construction projects such as houses, buildings, bridges, roads, etc. They are used to make house frames, scaffolding, plumbing systems, etc.
• Steel pipes are used in industrial production, manufacturing, transportation, etc. They are used to make machinery, equipment, pipes, etc.
• Steel pipes are used in civil applications. These include fences, furniture, decorations,….

Popular types of steel pipes today

As mentioned, steel pipes are very diverse. Depending on the purpose and needs, the project owner will choose the appropriate round steel pipe. Below are some commonly used types of round iron pipes:

• Welded steel pipe: This steel pipe is produced by welding method. This round pipe has a lower cost than seamless steel pipes but its durability and bearing capacity are not as high.
• Seamless steel pipe: This iron pipe is produced by the casting method. It has higher durability and bearing capacity than welded steel pipes but the price is also higher.
• Black steel pipe: This is a type of steel pipe produced from black steel. Black steel pipes are highly durable but have poor corrosion resistance.
• Galvanized steel pipe: a type of steel pipe made from black steel and plated with a layer of zinc on the outside. This type of steel pipe has a higher corrosion resistance than black steel pipe.
• Alloy steel pipe: It is produced from alloy steel. This steel pipe has higher durability and bearing capacity than regular steel pipes.

Classification of steel pipes

For people in the profession, they often classify steel pipes according to factors such as:

• Production method: Steel pipes can be divided into two main types: welded pipes and seamless pipes.
• Production materials: steel pipes are produced from many different types of steel. Including black steel, galvanized steel, alloy steel,…
• Intended use: steel pipes are used in many different applications. Therefore, they are classified according to their intended use.
• For example, construction steel pipes, industrial iron pipes, civil steel pipes,…

Specifications of steel pipes

Depending on each brand, the specifications of steel pipes will also be different. Below is the table of steel pipe specifications for Hoa Phat and Hoa Sen that we have compiled. You can refer to this before choosing to buy steel pipes for your project:

Specifications of Hoa Phat steel pipe

Hoa Phat steel pipes are manufactured according to TCVN 3783-1983 and ASTM A53 standards. This pipe has an outer diameter ranging from 12.7mm to 219.1mm. The pipe thickness is specified from 0.6mm to 12.7mm. The length of the pipe is specified from 6 m to 12 m. Below is the detailed specification table.

WEIGHT REGULATION TABLE FOR BLACK STEEL PIPES, STEEL PIPES, GALVANIZED STEEL PIPE CORRECTION PIPE (ASTM A5000, TCVN 3783-83)
OUTSIDE DIAMETER	THICKNESS	WEIGHT	LENGTH/BUNCH
MM	MM	KG/CÂY 6M
Φ12.7	0.7	1.24	100
	0.8	1.41
	0.9	1.57
	1.0	1.73
	1.1	1.89
	1.2	2.04
Φ13.8	0.7	1.36	100
	0.8	1.54
	0.9	1.72
	1.0	1.89
	1.1	2.07
	1.2	2.24
	1.4	2.57
Φ15.9	0.7	1.57	100
	0.8	1.79
	0.9	2.00
	1.0	2.20
	1.1	2.41
	1.2	2.61
	1.4	3.00
	1.5	3.20
	1.8	3.76
Φ19.1	0.7	1.91	168
	0.8	2.17
	0.9	2.42
	1.0	2.68
	1.1	2.93
	1.2	3.18
	1.4	3.67
	1.5	3.91
	1.8	4.61
	2.0	5.06
Φ21.2	0.7	2.12	168
	0.8	2.41
	0.9	2.70
	1.0	2.99
	1.1	3.27
	1.2	3.55
	1.4	4.10
	1.5	4.37
	1.8	5.17
	2.0	5.68
	2.3	6.43
	2.5	6.92
Φ22.0	0.7	2.21	168
	0.8	2.51
	0.9	2.81
	1.0	3.11
	1.1	3.40
	1.2	3.69
	1.4	4.27
	1.5	4.55
	1.8	5.38
	2.0	5.92
	2.3	6.70
	2.5	7.21
Φ22.2	0.7	2.23	168
	0.8	2.53
	0.9	2.84
	1.0	3.14
	1.1	3.73
	1.2	4.31
	1.4	4.59
	1.5	5.43
	1.8	5.98
	2.0	6.77
	2.3	7.29
	2.5
Φ25.0	0.7	2.52	113
	0.8	2.86
	0.9	3.21
	1.0	3.55
	1.1	3.89
	1.2	4.23
	1.4	4.89
	1.5	5.22
	1.8	6.18
	2.0	6.81
	2.3	7.73
	2.5	8.32
Φ25.4	0.7	2.56	113
	0.8	2.91
	0.9	3.26
	1.0	3.61
	1.1	3.96
	1.2	4.30
	1.4	4.97
	1.5	5.30
	1.8	6.29
	2.0	6.92
	2.3	7.86
	2.5	8.47
Φ26.65	0.8	3.06	113
	0.9	3.43
	1.0	3.80
	1.1	4.16
	1.2	4.52
	1.4	5.23
	1.5	5.58
	1.8	6.62
	2.0	7.29
	2.3	8.29
	2.5	8.93
Φ28.0	0.8	3.22	113
	0.9	3.61
	1.0	4.00
	1.1	4.38
	1.2	4.76
	1.4	5.51
	1.5	5.88
	1.8	6.89
	2.0	7.69
	2.3	8.75
	2.5	9.43
	2.8	10.44
Φ31.8	0.9	4.12	80
	1.0	4.56
	1.1	5.00
	1.2	5.43
	1.4	6.30
	1.5	6.73
	1.8	7.99
	2.0	8.82
	2.3	10.04
	2.5	10.84
	2.8	12.02
	3.0	12.78
	3.2	13.54
	3.5	14.66
Φ32.0	0.9	4.14	80
	1.0	4.59
	1.1	5.03
	1.2	5.47
	1.4	6.34
	1.5	6.77
	1.8	8.04
	2.0	8.88
	2.3	10.11
	2.5	10.91
	2.8	12.10
	3.0	12.87
	3.2	13.39
	3.5	14.76
Φ33.5	1.0	4.81	80
	1.1	5.27
	1.2	5.74
	1.4	6.65
	1.5	7.10
	1.8	8.44
	2.0	9.32
	2.3	10.62
	2.5	11.47
	2.8	12.72
	3.0	13.54
	3.2	14.35
	3.5	15.54
	3.8
Φ35.0	1.0	5.03	80
	1.1	5.52
	1.2	6.00
	1.4	6.96
	1.5	7.44
	1.8	8.84
	2.0	9.77
	2.3	11.13
	2.5	12.02
	2.8	13.34
	3.0	14.21
	3.2	15.06
	3.5	16.31
	3.8
Φ38.1	1.0	5.49	61
	1.1	6.02
	1.2	6.55
	1.4	7.60
	1.5	8.12
	1.8	9.67
	2.0	10.68
	2.3	12.18
	2.5	13.17
	2.8	14.36
	3.0	15.58
	3.2	16.53
	3.5	17.92
	3.8
Φ40.0	1.1	6.33	61
	1.2	6.89
	1.4	8.00
	1.5	8.55
	1.8	10.17
	2.0	11.25
	2.3	12.83
	2.5	13.87
	2.8	15.41
	3.0	16.42
	3.2	17.42
	3.5	18.90
	3.8	20.35
Φ42.2	1.1	6.69	61
	1.2	7.28
	1.4	8.45
	1.5	9.03
	1.8	10.76
	2.0	11.90
	2.3	13.58
	2.5	14.69
	2.8	16.32
	3.0	17.40
	3.2	18.47
	3.5	20.04
	3.8	21.59
Φ48.1	1.2	8.33	52
	1.4	9.67
	1.5	10.34
	1.8	12.33
	2.0	13.64
	2.3	15.59
	2.5	16.87
	2.8	18.77
	3.0	20.02
	3.2	21.26
	3.5	23.10
	3.8	24.91
Φ50.3	1.2	8.87	52
	1.4	10.13
	1.5	10.83
	1.8	12.92
	2.0	14.29
	2.3	16.34
	2.5	17.68
	2.8	19.68
	3.0	21.00
	3.2	22.30
	3.5	24.24
	3.8	26.15
Φ50.8	1.4	10.23	52
	1.5	10.94
	1.8	13.05
	2.0	14.44
	2.3	16.51
	2.5	17.87
	2.8	19.89
	3.0	21.22
	3.2	22.54
	3.5	24.50
	3.8	26.43
Φ59.9	1.4	12.12	37
	1.5	12.96
	1.8	15.47
	2.0	17.13
	2.3	19.60
	2.5	21.23
	2.8	23.66
	3.0	25.26
	3.2	26.85
	3.5	29.21
	3.8	31.54
	4.0	33.09
Φ75.6	1.5	16.45	27
	1.8	19.66
	2.0	21.78
	2.3	24.95
	2.5	27.04
	2.8	30.16
	3.0	32.23
	3.2	34.28
	3.5	37.34
	3.8	40.37
	4.0	42.38
	4.3	45.37
	4.5
		47.34
Φ88.3	1.5	19.27	24
	1.8	23.04
	2.0	25.54
	2.3	29.27
	2.5	31.74
	2.8	35.42
	3.0	37.87
	3.2	40.30
	3.5	43.92
	3.8	47.51
	4.0	49.90
	4.3	53.45
	4.5	55.80
	5.0	61.63
Φ108.0	1.8	28.29	16
	2.0	31.37
	2.3	35.97
	2.5	39.03
	2.8	43.59
	3.0	46.61
	3.2	49.62
	3.5	54.12
	3.8	58.59
	4.0	61.56
	4.3	65.98
	4.5	68.92
	5.0	76.20
Φ113.5	1.8	29.75	16
	2.0	33.00
	2.3	37.84
	2.5	41.06
	2.8	45.86
	3.0	49.05
	3.2	52.23
	3.5	56.97
	3.8	61.68
	4.0	64.81
	4.3	69.48
	4.5	72.58
	5.0	80.27
	6.0	95.44
Φ126.8	1.8	33.29	10
	2.0	36.93
	2.3	42.37
	2.5	45.89
	2.8	51.37
	3.0	54.96
	3.2	58.52
	3.5	63.86
	3.8	69.16
	4.0	72.68
	4.3	77.94
	4.5	81.43
	5.0	90.11
	6.0	107.25
Allowed tolerance on diameter +/-1%
Allowable tolerance on weight +/-10%

Specifications of Hoa Sen galvanized steel pipes

Current standard size system of steel pipes

• In the world today, there are two popular steel pipe size standard systems: the inch system and the mm system.
• The inch system is a standard system widely used in the United States and European countries. This system uses inch units to measure the outside diameter (OD) and thickness (t) of steel pipes.
• The mm system is a standard system widely used in Asian countries, including Vietnam. This system uses mm units to measure the outside diameter (OD) and thickness (t) of steel pipes.
• Differences between the two standard systems

These two standard systems have some basic differences as follows:

• Measuring unit: The inch system uses the inch unit to measure the outside diameter (OD) and thickness (t) of steel pipes. While the mm system uses mm units to measure the outside diameter (OD) and thickness (t) of steel pipes.
• Size: Steel pipe sizes according to the inch system are usually smaller than steel pipe sizes according to the mm system. For example, a steel pipe with an outside diameter of 1 inch in the inch system has an equivalent outside diameter of 25.4 mm in the system of mm.
• Thickness ratio: The thickness ratio of steel pipes according to the inch system is usually higher than the thickness ratio of steel pipes according to the mm system. For example, a steel pipe with an outside diameter of 1 inch and a thickness of 0.5 inch in the inch system has an equivalent thickness of 12.7 mm in the mm system.
  Steel pipe size conversion table

Below is the steel pipe size conversion table between the two standard systems inch and mm:

* Note: 1 inch ~ 25.4 millimeters (mm)
– Outside diameter tolerance: ± 10%
– Thickness tolerance: ± 10%.

Where can I buy quality and reputable steel pipe?

Are you looking for a place to buy round steel pipes at competitive prices? Bao Tin Steel is the most suitable candidate! This is an address specializing in providing seamless steel pipes, welded steel pipes, galvanized steel pipes, and black steel pipes. In addition, large steel pipes, square steel tubes, and shaped steel are also key products of Bao Tin Steel.

Partners of Bao Tin Steel are all reputable steel brands in the market. These include Hoa Phat, Hoa Sen, Nam Kim, VinaOne,… Along with that, the price that Bao Tin Steel offers is considered by many customers to be the best in the market because the company works directly with suppliers and does not go through any intermediaries.

In addition, when buying steel pipes here, customers will also receive support in delivering goods to the construction site. Goods are guaranteed, have enough information and customers can check with every order.

Above is interesting information about round steel pipes. Bao Tin Steel hopes that you have gained useful knowledge. If you want to order or receive a quote, don’t hesitate to call Hotline 0932 059 176.

Tiger Steel is a branch of Bao Tin Steel.