Models And Specifications of Seamless Carbon Steel Pipe

The seamless carbon steel pipe is a common pipeline material, widely used in petroleum, chemical, electric power and other fields. Its size and specification standards are important factors to ensure the installation and use of pipelines. This article systematically analyzes the classification standards, core parameters and typical specification applications of seamless carbon steel pipes.

Models of seamless carbon steel pipes

On the market, the models of seamless carbon steel pipes are diversified to meet the needs of different industries and application scenarios. Common models can be roughly divided into the following categories:

1. Classification by production process

Hot-rolled (extrusion, expansion) seamless steel pipes and cold-drawn (rolled) seamless steel pipes.

2. Classification by use

General structural pipes, fluid conveying pipes, medium and low pressure boiler tubes, high pressure boiler tubes, fertilizer special pipes, geological drill pipes and petroleum cracking pipes, etc.

3. Classification by standard

National standard (GB) seamless steel pipe: mainstream standard in the basic industrial field.

American standard (ASTM/ASME) seamless steel pipe: export equipment and foreign-related projects.

API SPEC 5L steel pipe: dedicated to the oil and gas industry.

Key dimensional parameters

After the model is determined, three core parameters should be focused on, which together determine the applicability and performance of the pipe:

1. Outer diameter D: Common range is from 6 mm to 1422 mm.

2. Wall thickness S: Common range is from 0.5 mm to 100 mm.

3. Length L: Common is 6 m, 9 m, 12 m, and can also be customized on demand.

Note: When selecting the model, mechanical performance indicators such as material grade, tensile strength, yield strength, hardness, etc. should also be considered.

Common seamless carbon steel pipe specification table

The following is a common seamless carbon steel pipe specification table:

The above specification table is only for common specifications. According to different usage scenarios and process requirements, there are many other specifications of seamless carbon steel pipes. When choosing seamless carbon steel pipes, in addition to considering the outer diameter, wall thickness and length, we should also pay attention to the physical properties of the steel pipe, such as material, hardness, tensile strength, and yield strength.

Outer diameter of seamless carbon steel pipe 159 pipe

Regarding the outer diameter of the 159 pipe, this is a specific seamless steel pipe size. "159" means that the outer diameter of the steel pipe is 159 mm. Steel pipes of this size are widely used in various industrial fields, such as petrochemicals, natural gas transportation, boiler manufacturing, etc. The following are its technical characteristics:

1. Nominal outer diameter: 159mm (allowable tolerance ±0.75mm, in accordance with DIN 2448).

2. Conventional wall thickness: 6-25mm (pressure range 4.5-32MPa).

3. Typical materials: 20# steel, Q345B alloy steel, stainless steel 316L.

In actual applications, the outer diameter of the 159 pipe will have a certain tolerance range to ensure the accuracy of production and installation. Usually, this tolerance is very small and will not affect the overall performance and use of the steel pipe.

Key points for purchase

1. Confirm the working conditions: working pressure, medium type, temperature range.

2. Select the appropriate standard: according to national or industry specifications (GB, ASTM, API, etc.).

3. Determine the key dimensions: outer diameter, wall thickness, length and tolerance.

4. Acceptance performance indicators: chemical composition of materials, mechanical properties report, non-destructive testing certificate.

5. Investigate the manufacturer: qualification certification, quality control system and delivery cycle.

Summary

In summary, the selection of models and specifications of seamless carbon steel pipes is a process that comprehensively considers multiple factors such as material, size, and purpose. Understanding this basic information can help us more accurately select steel pipe products that meet the needs of specific projects or projects. For the outer diameter of the 159 pipe, it is precisely controlled at 159 mm to ensure applicability and reliability in various application scenarios.

Read more: Roughness of carbon steel pipe or Thermal conductivity of carbon steel pipe