Mirror Polished Stainless Steel Pipe Seamless EN 10216 10216-2 10216-3 10216-5

EN 10216-5 Stainless Steel Tube for pressure purposes – Technical delivery conditions – part 2: Alloy and non-alloy steel tubes with specified high temperature properties This part of the EN10216 standard specifies the technical delivery conditions for non-alloy and alloy circular steel tubes with specified high temperature properties under two test categories. Steel grade: 16Mo3 Code: 1.5415

Heat treatment: normalizing or normalizing rolling temperature: 890 - 950 ℃ Cooling medium: air

Application

It is mainly suitable for seamless stainless steel pipes used in different pressure environments. It is widely used in petroleum, chemical, energy, pharmaceutical and other industries for conveying various fluid media and working in high temperature, high pressure and corrosive environments.

Chemical composition

It covers a variety of stainless steel grades, such as the common 304 (1.4301), 316 (1.4401), 321 (1.4541), etc. Stainless steel pipes of different grades have different chemical compositions.

For example, 304 stainless steel mainly contains chromium (Cr) 18-20%, nickel (Ni) 8-10.5% and other elements; 316 stainless steel contains chromium (Cr) 16-18%, nickel (Ni) 10-14%, molybdenum (Mo) 2-3% and other elements. The content of these elements determines the corrosion resistance, mechanical properties and other characteristics of stainless steel pipes.

Dimensions

It specifies the size range of stainless steel pipes, such as outer diameter and wall thickness. The outer diameter can be from smaller to larger to meet the needs of different application scenarios. The wall thickness is also specified according to the different outer diameters.

For example, the outer diameter can range from a few millimeters to tens of centimeters, and the wall thickness can range from a few tenths of a millimeter to a few centimeters. The specific size specifications can be selected according to the actual application requirements, but must meet the requirements in the standard.

Mechanical properties

The mechanical properties of stainless steel pipes of different grades and sizes under different conditions are clarified, such as tensile strength, yield strength, elongation, etc.

For example, the tensile strength of 304 stainless steel pipes is generally above 520MPa, the yield strength is above 205MPa, and the elongation is above 40%. These mechanical performance indicators ensure that the stainless steel pipe can withstand the corresponding loads and stresses during use, and ensure the stability and safety of its structure.

Manufacturing process

The manufacturing process of stainless steel pipes is standardized, including the selection of raw materials, smelting methods, forming processes, heat treatment processes, etc.

It is required to use high-quality raw materials and ensure the purity of molten steel and the accuracy of chemical composition through appropriate smelting methods. The forming process usually adopts methods such as hot rolling and cold drawing to obtain the required size and shape. Heat treatment processes are carried out according to different grades and requirements to improve the structure and performance of stainless steel pipes.

In addition, the quality control points and inspection requirements in the manufacturing process are also specified to ensure that the product quality of each process meets the standards.

Quality control and inspection

Strict quality control and inspection are required throughout the entire production process from raw materials to finished products.

The raw materials are subject to chemical composition analysis, mechanical property testing, etc.; the key process parameters are monitored and recorded in real time during the production process; the finished stainless steel pipes are subject to appearance inspection, dimensional measurement, non-destructive testing (such as eddy current testing, ultrasonic testing, etc.), water pressure testing, and re-inspection of chemical composition and mechanical properties.

Some special applications may also require additional tests or inspection items, such as intergranular corrosion tests, high-temperature endurance strength tests, etc., to ensure that the product quality meets specific use requirements and safety standards.

In short, the EN 10216-5 standard specifies the various requirements for stainless steel pipes in detail, aiming to ensure that the produced stainless steel pipes have reliable quality, good performance and meet the requirements of specific application scenarios, and ensure the safe and stable operation of pressure-bearing equipment. When users select stainless steel pipes that meet the EN 10216-5 standard, they need to consider the brand, size, mechanical properties and other parameters of the stainless steel pipe according to specific use conditions, medium characteristics, design requirements and other factors to select the most suitable product. At the same time, manufacturers must also strictly follow the standard requirements for production and quality control to ensure that product quality meets the standard requirements.