Specifications of stainless steel pipelines

In the world of steel, stainless steel pipelines are favored for their excellent corrosion resistance and durability. You may often hear about or use these pipelines, but do you know what specifications they have?

First, classification by diameter
The diameter of the stainless steel pipeline determines its use and carrying capacity. Common diameter specifications are:
1. Small-diameter stainless steel pipe: usually refers to pipelines with an outer diameter of less than Φ10 mm, mainly used for delicate process flows or special equipment.
2. Medium-diameter stainless steel pipe: The outer diameter is between Φ10 mm and Φ100 mm. This type of pipeline is suitable for most industrial purposes, such as conveying fluids, gases, etc.
3. Large-diameter stainless steel pipe: The outer diameter is greater than Φ100 mm, mainly used in large engineering projects such as water treatment, chemical industry, etc.

Second, classification by thickness
The thickness of stainless steel pipelines directly affects its pressure resistance and service life. Common thickness specifications are:
1. Thin-walled stainless steel pipe: usually with a thickness of 1 mm to 3 mm, lightweight, easy to install and transport.
2. Medium-thick wall stainless steel pipe: The thickness is between 3 mm and 6 mm, suitable for occasions with certain pressure and strength requirements.
3. Thick-wall stainless steel pipe: The thickness is greater than 6 mm, mainly used in high-pressure, high-strength environments or occasions that require long-term corrosion resistance.

Third, classification by connection method
Stainless steel pipelines with different connection methods are suitable for different installation requirements and environments. Common connection methods are:
1. Welded stainless steel pipe: The pipes are connected together by a welding process, with reliable sealing and high-pressure resistance.
2. Threaded stainless steel pipe: It is connected to the corresponding joint through the thread inside the pipe, which is easy to install, but has low-pressure resistance.
3. Sleeve-type stainless steel pipe: The metal sleeve is used to connect the pipe, which is easy to operate and suitable for occasions with vibration or frequent disassembly.
4. Flange-connected stainless steel pipe: The pipe is connected to the equipment or pipeline through the flange, with good sealing, suitable for high-pressure or high-flow fluid.

Fourth, classification by surface treatment
The surface treatment of stainless steel pipelines has a great influence on its corrosion resistance and aesthetics. Common surface treatment methods are:
1. Polished stainless steel pipe: The surface is as smooth as a mirror, suitable for occasions requiring high gloss or cleanliness.
2. Sandblasted stainless steel pipe: The surface is sandblasted to present a matte effect and has a certain anti-slip function.
3. Chrome-plated stainless steel pipe: A layer of chrome is plated on the surface of stainless steel to increase wear resistance and corrosion resistance. It is often used in food, medical, and other industries.
4. Plastic-sprayed stainless steel pipe: The surface of the pipe is covered with a layer of plastic coating to improve chemical corrosion resistance and UV resistance.
5. Electroplated stainless steel pipe: Metal or alloy plating is deposited on the surface of stainless steel by electrochemical methods to enhance corrosion resistance.

Fifth, special-purpose stainless steel pipelines
For special purposes and industry needs, there are also some special types of stainless steel pipelines:
1. Duplex stainless steel pipe: It has excellent mechanical properties and corrosion resistance and is used in high-demand occasions such as petroleum and chemical industries.
2. High-purity stainless steel pipe: It is suitable for fields with extremely high purity requirements, such as semiconductors, pharmaceuticals, etc.
3. High-temperature stainless steel pipe: It can maintain excellent performance in high-temperature environments and is suitable for thermal pipelines, boilers, and other industries.
4. Stainless steel bellows: It has softness and pressure resistance and are widely used in compensation displacement, shock absorption, and sealing.
5. Stainless steel seamless pipe: There is no welding seam on the entire pipe body, which has higher strength and corrosion resistance and is suitable for high-pressure and high-flow rate fluid transportation.

Sixth, choose the appropriate specifications
When choosing stainless steel pipelines, choose the appropriate specifications according to actual use and needs. For example, for the need to transport highly corrosive fluids, thick-walled, corrosion-resistant stainless steel pipes should be selected; for occasions that need to withstand high pressure, thick-walled stainless steel pipes with high-pressure resistance should be selected. At the same time, factors such as the connection method and surface treatment of the pipeline should also be considered to ensure that it is suitable for specific environments and use requirements.

There are many specifications of stainless steel pipelines, and different specifications have different characteristics and applicable scopes. Understanding and being familiar with these specifications will help us choose the appropriate stainless steel pipelines in practical applications to ensure their performance safety and reliability.