Learn about Ø355 seamless steel pipes: applications and technical characteristics.

Ø355 seamless steel pipe (DN350) standard ASTM A106/A53/API 5L is a cast steel pipe with an OD of 355mm. Has a nominal diameter of DN350, and a nominal diameter of NPS 14. Widely produced and used in many industries, especially:

  • In the oil and gas industry
  • In construction
  • Transport liquids, gases, vapors, and other substances.

Let’s find out more in detail about Bao Tin Steel in this article.

About Ø355 seamless steel pipe

Seamless steel pipe Ø 355 is a steel pipe with an outer diameter of about 355 mm. This is considered one of the types of large-diameter seamless steel pipes.

Products are used in many fields, such as the oil and gas industry, construction industry, machinery manufacturing, transportation, and storage of liquids, gases, and vapors.

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Chemical composition of DN350 seamless steel pipe

The chemical composition of DN350 seamless steel pipe according to ASTM A106 standards is specified as follows:

  • Carbon (C): from 0.17% to 0.25%
  • Manganese (Mn): from 0.35% to 0.90%
  • Silicon (Si): maximum 0.040%
  • Sulfur (S): 0.050% max
  • Phosphorus (P): maximum 0.040%
  • Chromium (Cr): maximum 0.40%
  • Nickel (Ni): 0.40% maximum
  • Molybdenum (Mo): 0.15% max
  • Additive materials: copper, nickel, chrome, vanadium, titanium, aluminum, columbium, and tungsten
Thành phần hóa học của mác thép
Chemical composition of steel grades

In addition to its chemical composition, according to ASTM A106 standards, DN350 seamless steel pipe must also meet other requirements, such as:

  • About wall thickness
  • Elongation
  • Stiffness
  • Tensile
  • And the area decreases when stretched.

These requirements must also comply with strict standards and regulations to ensure product uniformity and quality..

Mechanical properties of DN350 seamless steel pipe

The mechanical properties of DN350 seamless steel pipe according to ASTM A106 standards are very good. These characteristics are specified in the standards and regulations of each country or specialized organization. Below are some of the main mechanical properties of DN350 seamless steel pipe according to ASTM A106 standards:

  • Tensile strength: 415 MPa or more
  • Yield strength: 240 MPa or more
  • Elongation: 30% or more.
  • Reduction of area when stretched (reduction of area): from 35% or more
  • Brinell hardness: from 137 to 241

The mechanical properties of DN350 seamless steel pipe may vary depending on the intended use. And the regulatory standards of each country or quality certification organization.

DN350 seamless steel pipe specification table

NPS DN OD Carbon Pipe Stainless steel pipe T
14 350 355,6 5S 3,962
10S 4,775
10 6,350
20 7,925
STD 30 9,525
40 11,125
XS 12,700
60 15,088
80 19,050
100 23,825
120 27,788
140 31,750
160 35,712
Thép ống đúc phi 355 tại BTS
Seamless steel pipe Ø355 at BTS

Standards and regulations on Ø 355 seamless steel pipes

When using Ø 355 seamless steel pipes in construction projects, it is necessary to comply with the following standards and regulations:

  1. Steel is produced according to international standards such as ASTM A106, ASTM A53 standard, API 5L standard, GOST, JIS, DIN, etc.
  2. Ø355 seamless pipes must comply with the size and thickness standards specified in the respective production standards.
  3. Workpiece materials must comply with standards such as ASTM A106, A53, and API 5L.
  4. Ø355 seamless steel pipes need to be fully inspected and tested to ensure quality and safety in use. Inspection and testing standards include measurement tests, mechanical tests, chemical tests, heat resistance tests, pressure tests, etc. Specific inspection and testing standards will depend on the type of pipe. And the intended use and technical requirements of the project.
  5. Transportation Regulations: When transporting, you must comply with the transportation regulations set out in local standards and regulations. The transport must be carried out properly, to ensure the safety of the product and the participant in the transport.
Các tiêu chuẩn và quy định về ống thép đúc phi 355
Standards and regulations for Ø355 seamless pipes

In addition, it is necessary to comply with legal regulations and labor safety laws related to the production, transportation, and installation of non-355 seamless pipes in construction projects.

Advantages of DN350 seamless steel pipe

Ø355 ASTM A106 seamless steel pipe is a high-quality steel material. Commonly used in construction, production, and transportation. Here are some of its advantages:

  1. Durable. DN350 ASTM A106 seamless steel pipe has high durability. Withstands strong pressure and impact, helping to increase product durability and longevity.
  2. Good corrosion resistance. Especially with galvanized steel pipes, the corrosion resistance is better than many other steel pipes.
  3. Good heat resistance. DN350 ASTM A106 seamless steel pipe has good heat resistance. It helps minimize deformation and cracking during use at high temperatures.
  4. Ability to withstand high pressure. DN350 A106 seamless steel pipe is capable of withstanding high pressure. It helps increase the safety and reliability of the product during use.
  5. DN350 A106 seamless steel pipe meets strict technical standards in terms of thickness, chemical composition, durability, dimensional accuracy, etc., helping to ensure quality and safety in use.
Ưu điểm của thép ống đúc DN350
Advantages of DN350 seamless steel pipe

Applications of Ø 355 seamless steel pipes

Ø 355 ASTM A106 seamless steel pipe is widely used in industries such as:

  1. Oil and gas industry: used to produce oil, gas, wastewater pipelines, and equipment related to the oil and gas industry.
  2. Road and bridge construction: used to build roads, bridges, water pipelines, gas pipelines, etc.
  3. Irrigation works: used to build irrigation works such as water pipeline systems,…
  4. Machinery production: used in the production of machinery, industrial equipment, and products related to industry.
  5. Construction of civil works: Used in the construction of civil works such as water pipeline systems, electrical systems, etc.
Ứng dụng của ống thép đúc phi 355
Application of Ø 355 seamless steel pipes

With the advantages of durability, heat resistance, high-pressure resistance, ease of processing and installation, and reasonable cost, Ø 355 seamless steel pipe according to the ASTM A106 standard is widely used and meets the requirements well. engineering in various industries.

Address to buy reputable Ø 355 seamless steel pipes

Bao Tin Steel Company Limited is currently an enterprise that produces, imports, and distributes first-class iron and steel products. There are many famous brands in the market, such as Hoa Phat, SeAH, and An Khanh.
We specialize in providing steel, seamless steel pipes, welded steel pipes, galvanized steel pipes, large-diameter steel pipes, etc. In addition, we also provide square and rectangular steel box products, etc., at a cheap price.

  • Steel pipe products sold are produced on modern technological lines and have clear labels.
  • Full specifications and suitable weight for every project.
  • There are warehouses in central locations, supporting delivery to the construction site.
  • The price may be discounted depending on the order quantity.
  • Professional processing of applications: full VAT invoice.
  • Provide enough CO, CQ, and CNXX documents.
  • Customers who purchase products at Bao Tin have the right to come to the warehouse to view and inspect the product before making a deposit.
Công Ty TNHH Thép Bảo Tín
Bao Tin Steel Company Limited – Northern Branch

How to choose and preserve Ø 355 seamless steel pipes

Factors to keep in mind when choosing and buying Ø355 seamless steel pipes

When choosing and purchasing Ø355 seamless steel pipes, there are some important factors to note, as follows:

  1. Technical standards. DN350 seamless steel pipes need to meet technical standards such as ASTM A106. Or equivalent to ensure product quality and durability.
  2. Specifications. Specifications of Ø 355 seamless steel pipes, such as diameter, thickness, and length, need to be determined by the technical requirements of the project where the product is used.
  3. Steel quality. The quality of DN350 cast steel pipe needs to be checked to ensure there are no holes or cracks. Or other dirt that affects the product’s durability and load-bearing capacity.
  4. Origin and manufacturer. You should choose Ø355 seamless steel pipe products produced by reputable manufacturers with clear origins to ensure product quality.
  5. Price and warranty policy. You should consult many different suppliers to compare prices and warranty policies for the product to make the best choice.
  6. Transportation and installation. It is necessary to consider the transportation and installation of products to ensure cost and time savings for project use.
Những yếu tố cần lưu ý khi lựa chọn và mua thép ống
Factors to keep in mind when choosing and buying steel pipes

Methods of preserving and cleaning seamless steel pipe Ø 355

To preserve seamless steel pipes, the following methods can be applied:

  1. Store in a dry warehouse to avoid moisture, rust, and other factors affecting product durability.
  2. Store in suitable packaging to avoid impact or scratches on the surface.
  3. The surface of DN350 cast steel pipe needs to be cleaned to avoid dust and substances that affect product quality. You can use soft towels, brushes, or specialized cleaning solutions to clean steel surfaces.
  4. .Ø355 seamless steel pipe can corrode if left in a humid or acidic environment. Therefore, it is necessary to use anti-corrosion protection agents such as anti-rust paint or protective oils to preserve the product.
  5. The manufacturer’s regulations and storage instructions should be followed to ensure product quality and durability.

Tiger Steel  is a branch of Bao Tin Steel.

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