Features and applications of sanitary seamless pipes

What is a sanitary seamless pipe?

Sanitary seamless pipe is a seamless pipe (SMLS) specially used in highly sanitary industries, with a high degree of flatness, cleanliness and finish.

Features:
High corrosion resistance: using high-quality materials and advanced production technology, it can withstand the erosion of various chemical media.
Reliable sealing: using precise production technology and high-quality sealing materials, it can effectively prevent medium leakage and external pollution.

Good weldability and machinability: easy to process and install.

Production process:
The production process requirements of sanitary seamless steel pipe are very high, mainly including the following steps:

Steelmaking: raw material preparation to ensure that the material of the steel pipe meets the requirements.
Rolling round steel: rolling the refined steel billet into round steel.
Piercing: the round steel is pierced into a rough pipe through a piercing machine.

Cold drawing/cold rolling: the rough pipe is cold drawn or cold rolled to improve the dimensional accuracy and surface finish of the steel pipe. Among them, cold rolling is the key equipment for domestic manufacturing of sanitary seamless stainless steel pipes. The surface finish of the inner and outer surfaces of the steel pipe after cold rolling can reach Ra≤0.8μm, and after polishing, it can reach Ra≤0.2~0.4μm (such as mirror surface).

Bright annealing: The annealing treatment is carried out in a gas-protected bright annealing furnace to change the metallographic structure of the steel pipe and improve its mechanical properties and surface finish.
Internal and external surface polishing: The inner and outer surfaces of the steel pipe are polished to achieve higher finish requirements.

Inspection and acceptance: Various quality inspections are carried out on the steel pipe to ensure that it meets the relevant standards and requirements.
Packaging and warehousing: Qualified steel pipes are packaged and stored in the warehouse.

Application fields of sanitary seamless pipes:

The application range of sanitary seamless pipes is very wide, and they are mainly used in the following fields:

1. Pharmaceutical industry
Sanitary seamless stainless steel pipes are widely used in the pharmaceutical industry, mainly for conveying liquid medicines, biological products, high-purity water and other media. Its excellent corrosion resistance, high temperature resistance and pressure resistance can ensure the quality and safety of drugs.

2. Food industry
Sanitary seamless pipes are also widely used in the food industry, such as beverage, alcohol, dairy products, additives, condiments and other production lines. Its smooth surface and no dead angle design can avoid food residues and bacterial growth, ensuring the hygiene and quality of food.

3. Cosmetics industry
Sanitary seamless pipes are also used in the cosmetics industry to transport cosmetic raw materials and products. Its material and processing technology can ensure the purity and safety of cosmetics.

In addition, sanitary seamless pipes are also suitable for bioengineering, chemical, environmental protection, petroleum and other fields, for transporting various fluid media. It should be noted that in different fields of application, sanitary seamless pipes need to meet different standards and requirements to ensure the quality and safety of products.

Precautions:
When selecting and using sanitary seamless steel pipes, the following points should be noted:

Material selection: According to the requirements of the use environment and medium, select suitable materials, such as 304 stainless steel, 316L stainless steel, etc.
Dimension accuracy: Ensure that the dimensional accuracy of the steel pipe meets the design requirements to avoid problems during installation and use.

Surface finish: Check the surface finish of the steel pipe to ensure that it meets the relevant standards and requirements.

Quality inspection: Carry out necessary quality inspections on the steel pipe, such as pressure test, sealing test, etc., to ensure its reliable quality.

In summary, sanitary seamless steel pipes have excellent performance and a wide range of applications, and are an indispensable and important material in highly sanitary industries.

Read more: Top 10 things to consider when buying seamless stainless steel sanitary pipes