Sanitary Stainless Steel Tube for food 3A

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Specifications

1. Cold Rolled 304 &316L Material
2. Highest degree of purity and cleanliness
3. For Dairy, Food, Beverage, and Other Sanitary

Product Name: 3A Sanitary Stainless Steel Tube for food

Materials

304L & 316L available with order.

Introduction

For Dairy, Food, Beverage, and Other Sanitary Applications.

Associated Tube’s sanitary tube is ideal for the dairy, food and beverage industries where the highest degree of purity and cleanliness is essential.

It is certified to the requirements of ASTM A270, 3A standards and most user specifications. Tubing is manufactured from the finest quality raw materials made exclusively to Associated Tube melt parameters.

Customers have come to rely on the quality of our sanitary tube products as well as our uncompromised commitment to total customer satisfaction.

Annealing

Hydrogen bright annealed in line to 1900°F (1040° C) minimum and rapidly quenched.

Surface Finishes

Surface finish is 20 µ-in Ra (0.5 µm) ID maximum, 30 µ-in Ra (0.8 µm) OD maximum surface roughness measured per ASME/ANSI B46.1 with the profilometer reading at 90 degrees to the lay. Other finishes available upon request.

Packaging

As a final step to ensure purity standards, each tube is packaged using 2 mil poly sleeving and both ends are sealed using air tight end caps. Tubes are packaged in protective tri-wall boxing. When specified, wood boxes and all export requirements can be provided.

Marking

Bright annealed tubing is line–stenciled with OD, wall, ASTM specifications, size, grade, heat number, production date and time. OD polished tube is marked on one end of each tube with a removable label stating ASTM specification, manufacturer, grade and heat number. Continuous line stencil available on request.

Q:What is the difference between 304LN and 304 stainless steel pipes?: The main difference between 304LN and 304 stainless steel pipes lies in the nitrogen content. 304LN stainless steel contains a higher nitrogen content, which improves its strength and corrosion resistance compared to 304 stainless steel. This makes 304LN a better choice for applications where high strength and resistance to corrosion are important factors.

Q:How are stainless steel pipes manufactured?: Stainless steel pipes are manufactured through a multi-step process that involves various stages of fabrication and shaping. The manufacturing process begins with the selection of high-quality stainless steel, usually in the form of sheets or coils. These steel sheets are thoroughly inspected for any defects or imperfections before being cut into the desired length or size. Once the sheets are cut, they are fed into a forming machine where they are rolled into the shape of a cylindrical tube. This process is known as cold rolling, and it helps to give the pipe its initial shape and thickness. The rolled sheets are then welded together using either a high-frequency induction welding technique or a submerged arc welding method. Both methods ensure a strong and durable weld joint. After the welding process, the pipe goes through a series of finishing treatments to improve its appearance and physical properties. The first step is to remove any excess weld material using a trimming machine. This ensures a smooth and even surface along the length of the pipe. Next, the pipe is subjected to a heat treatment called annealing. Annealing helps to relieve internal stresses and improve the pipe's mechanical properties. It also enhances the corrosion resistance of the stainless steel. Following annealing, the pipe may undergo additional processes such as pickling and passivation. Pickling involves immersing the pipe in an acid solution to remove surface impurities and oxides. Passivation, on the other hand, involves treating the pipe with a chemical solution to create a protective oxide layer on its surface, enhancing its resistance to corrosion. Once the finishing treatments are complete, the pipes are cut to the desired length and undergo a final inspection for quality assurance. This involves checking dimensions, surface finish, weld integrity, and overall appearance. In conclusion, stainless steel pipes are manufactured through a meticulous process that includes cutting, forming, welding, finishing treatments, and quality control measures. This ensures that the pipes meet the required standards and exhibit excellent properties such as strength, durability, and corrosion resistance.

Q:What are the different types of stainless steel pipe end connections?: Various types of stainless steel pipe end connections are available, each designed to meet specific application and requirement criteria. Some commonly used types include: 1. Threaded connections: These connections have threads on the inside or outside of the pipe end, enabling it to be screwed onto another threaded fitting or pipe. Threaded connections are typically utilized in low-pressure applications. 2. Socket-weld connections: In this connection type, the pipe end is inserted into a socket or recess of a socket-weld fitting and then welded around the outer circumference of the pipe. Socket-weld connections are ideal for high-pressure applications and are renowned for their strength and reliability. 3. Butt-weld connections: Butt-weld connections involve directly welding the pipe end to another pipe or fitting. They are commonly found in high-pressure and high-temperature applications. 4. Flanged connections: These connections have a flange on the pipe end, which is bolted to a mating flange on another pipe or fitting. Flanged connections are used in applications that require easy disassembly or frequent maintenance. 5. Compression connections: Compression connections utilize a compression fitting to join the pipe ends. These connections are often employed in plumbing and gas supply systems due to their ease of installation. 6. Grooved connections: Grooved connections employ grooved couplings to join the pipe ends. These connections are frequently utilized in fire protection systems and are known for their swift and uncomplicated installation. Ultimately, the choice of stainless steel pipe end connection depends on the specific application, pressure requirements, ease of installation, and maintenance considerations. It is essential to consult with a professional or refer to industry standards to determine the most suitable connection type for your particular needs.

Q:Can stainless steel water pipes be cooled and bent?: They are lighter in bending and torsional strength, and therefore are widely used in the manufacture of mechanical parts and engineering structures. It is also used to produce all kinds of conventional weapons, guns, shells and so on.

Q:What are the different grades of stainless steel used for pipes?: Pipes commonly utilize various grades of stainless steel, each possessing unique properties and characteristics. The following are some of the most frequently employed grades: 1. Grade 304: Widely utilized, this stainless steel grade offers exceptional corrosion resistance, high-temperature strength, and satisfactory formability. It finds common use in both indoor and outdoor applications, including water supply pipes, food processing equipment, and architectural structures. 2. Grade 316: Similar to Grade 304, this grade contains a higher molybdenum content, enhancing its resistance to corrosion, particularly against chlorides and other corrosive substances. It is commonly employed in marine environments, chemical processing plants, and medical equipment. 3. Grade 321: This grade contains titanium, which stabilizes it against sensitization during welding or high-temperature exposure. Notably, it exhibits exceptional oxidation resistance and is suitable for applications involving high temperatures, such as exhaust systems and boilers. 4. Grade 409: Due to its outstanding heat resistance and durability, this grade is frequently employed in automotive exhaust systems. Additionally, it demonstrates resistance to corrosion caused by road salts and other harsh chemicals. 5. Grade 347: Similar to Grade 321, this grade incorporates niobium, providing further stabilization against sensitization. It is commonly utilized in high-temperature applications that necessitate resistance to intergranular corrosion, such as aircraft and jet engine components. These examples merely scratch the surface of the multitude of stainless steel grades utilized in pipe manufacturing. The selection of a specific grade for a given application depends on various factors, including the environment, temperature, corrosion resistance requirements, and necessary mechanical properties.

Q:What is the difference between seamless and electric resistance welded stainless steel pipes?: Seamless and electric resistance welded (ERW) stainless steel pipes vary in terms of their production process and the characteristics of the resulting pipes. Seamless stainless steel pipes are made through hot rolling or cold drawing. A solid cylindrical billet or ingot is heated and pierced to create a hollow tube. This tube is then elongated and reduced in diameter to achieve the desired size and thickness. Since seamless pipes lack any welding seam, they possess higher strength, corrosion resistance, and pressure resistance compared to welded pipes. They are commonly used in high-pressure applications due to their ability to withstand stress and resist leaks or failures. In contrast, electric resistance welded stainless steel pipes are manufactured by applying heat and pressure to longitudinally welded stainless steel strips or plates. The edges of the strip or plate are heated and fused together under pressure to form a tube. ERW pipes have a visible welded seam along their length due to the welding process. Although the welded seam may slightly diminish the overall strength and corrosion resistance of the pipe, ERW pipes are still highly durable and suitable for various applications. They are frequently utilized in industries such as oil and gas, petrochemical, and plumbing. To summarize, the primary distinction between seamless and electric resistance welded stainless steel pipes lies in their manufacturing process and the presence of a visible welded seam. Seamless pipes are produced without welding, resulting in superior strength and corrosion resistance, particularly in high-pressure applications. Conversely, ERW pipes are formed through welding, resulting in a visible seam, but they still possess good durability and are widely used in different industries.

Q:What is the maximum temperature stainless steel pipes can withstand?: The specific grade of stainless steel used determines the maximum temperature that stainless steel pipes can tolerate. Typically, these pipes can withstand high temperatures between 1200°C and 1400°C (2200°F to 2550°F). However, it's essential to consider that the actual maximum temperature may differ due to factors like the stainless steel composition, the duration of exposure to high temperatures, and the presence of corrosive elements in the surroundings. To obtain precise temperature limits for a specific grade of stainless steel pipe, it is always advised to refer to the manufacturer's specifications or seek guidance from a professional engineer.

Q:Are stainless steel pipes suitable for food processing applications?: Stainless steel pipes prove to be highly suitable for food processing applications, primarily due to their unique properties that render them hygienic, resistant to corrosion, and easily cleanable. The smooth surface of these pipes effectively prevents the accumulation of bacteria and other contaminants, thus ensuring the safety and purity of food products. Moreover, stainless steel exhibits non-reactivity, making it incapable of imparting taste, odor, or color to the processed food. Consequently, it emerges as an ideal choice for various industries, including dairy, brewing, and food processing, where the preservation of product integrity stands paramount. Additionally, stainless steel pipes boast exceptional strength and durability, enabling them to withstand the demanding requirements of food processing operations. In conclusion, stainless steel pipes possess the necessary attributes to uphold the highest standards of food safety and quality.

Q:What is the difference between seamless and longitudinal welded stainless steel pipes?: The manufacturing processes and structural characteristics of seamless and longitudinal welded stainless steel pipes vary. Seamless pipes, for instance, are formed by heating a solid cylindrical bar of stainless steel and pushing it through a die to create a hollow tube. This process eliminates the need for welded seams, resulting in a uniform composition and consistent strength and corrosion resistance. As a result, seamless pipes are commonly used in high-pressure applications like oil and gas pipelines and refinery equipment due to their superior mechanical properties. In contrast, longitudinal welded pipes are made by joining two separate pieces of stainless steel plate or sheet together through a longitudinal welding process. The plates or sheets are rolled into a cylindrical shape, and the seam is welded along the length of the pipe. This welding technique provides structural integrity and strength to the pipe, although it may introduce some slight inconsistencies in the steel's composition and properties. However, these inconsistencies can be minimized through appropriate welding techniques and quality control measures. Longitudinal welded pipes are widely used in various fields, including structural and architectural projects, as well as in industries such as food processing, pharmaceuticals, and petrochemicals. In conclusion, the main distinction between seamless and longitudinal welded stainless steel pipes lies in their manufacturing methods and resulting structural characteristics. Seamless pipes have no welded seams and offer excellent mechanical properties, making them suitable for high-pressure applications. On the other hand, longitudinal welded pipes are created by welding two separate stainless steel pieces together and are commonly utilized in different industries. The choice between these types of pipes depends on specific requirements and considerations for the intended application.

Q:In stainless steel tubes, why are there some SS in the back and some standard L, such as 316L and 316SS? What's the difference?: 316SS carbon content is higher than 316L (with L indicating ultra low carbon, corrosion resistance of chloride ion, improve its resistance to intergranular corrosion and oxide stress corrosion resistance), mechanical properties,.316SS strength higher than 316L316L is the steel that continues to reduce carbon content on the basis of 316316L is more resistant to corrosion due to its low carbon content

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