• The 316L stainless steel pipe System 1
The 316L stainless steel pipe

The 316L stainless steel pipe

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Supply Capability:
20000 kg/month

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316L is a stainless steel grades, said the main containing Cr, Ni, Mo digital percentage probably contains (not accurate, probably only), 316L is the material corresponding US label, Sus 316L is corresponding to the Japanese label. Standard of our country as 022Cr17Ni12Mo2. (new standard) of old brand 00Cr17Ni14Mo2

316L - C: chemical composition of carbon less than 0.030 silicon Si: less than or equal to 1

Manganese: less than 2 Mn

316L S: less than 0.030 sulfur

P: less than 0.035 P

Chrome Cr:16.00 ~ 18

Ni Ni:12.00 ~ 16

Mo Mo:2.00 ~ 3

Corrosion resistance

316L because of its excellent corrosion resistance is widely used in chemical industry, 316L is belong to 18-8 type austenitic stainless steel are derived, add the Mo element 2 ~ 3%. On the basis of 316L, and derived a lot of steel, such as adding a small amount of Ti derived after 316Ti, add a small amount of N derived after 316N, increased Ni, Mo content derived 317L.

The market of the existing 316L most is in accordance with the American Standard to production. Because of cost considerations, steel mills generally the Ni content of the products as much as possible to lower limit on. American standard regulation, Ni of 316L content for 10 ~ 14% day marks the regulation, Ni of 316L content for 12 ~ 15%. According to the minimum standard, American Standard and Japanese standard 2% of the difference in the Ni content, reflected in the price is quite huge, so customers in the purchase of 316L products still need to see, the product is according to ASTM or JIS standard.

Mo 316L content makes this kind of steel has excellent resistance to pitting corrosion, can be safely used in containing Cl - and halogen ion environment. As the main application of 316L is its chemical properties, surface inspection of steel on the requirements of 316L was slightly lower (relative to 304), higher on the surface of the customer must strengthen the surface inspection dynamics.

316L - Mechanical Properties of tensile strength B (MPa): 480

The yield strength of sigma 0.2 (MPa): 177

Elongation of 5 (%): 40

Section shrinkage (%): = 60 PSI

Hardness: = 187HB; = 90HRB; = 200HV

Hardness is less than or equal to 187HB = 90HRB = 200HV

Density: 7.98g/cm3;

Specific heat ratio (20 DEG C): 0.502J/ (g*K)

Thermal conductivity (W/ (m*K))

100 C 300 C 500 C

15.1 18.4 20.9

316L - heat treatment solution 1010 ~ 1150 DEG C fast cooling.

316L - metallographic organization characteristics for austenitic.

Q:What are the different finishes available for stainless steel pipes?
There are several different finishes available for stainless steel pipes, each offering its own unique look and level of corrosion resistance. 1. Brushed Finish: This finish is achieved by brushing the surface of the stainless steel pipe with a fine abrasive material, resulting in a dull, textured appearance. It effectively hides scratches and fingerprints, making it a popular choice for applications where aesthetics are important, such as architectural projects. 2. Mirror Finish: Also known as a polished or reflective finish, this is achieved by polishing the surface of the stainless steel pipe to a high shine. It provides a smooth, reflective surface that is easy to clean and is commonly used in decorative applications, such as handrails and furniture. 3. Satin Finish: Similar to the brushed finish, the satin finish is achieved by using a fine abrasive material to create a smooth, dull appearance. It offers a slightly more refined look compared to the brushed finish and is commonly used in applications where corrosion resistance is important, such as in the food and beverage industry. 4. Embossed Finish: This finish involves imprinting a pattern onto the surface of the stainless steel pipe, adding texture and visual interest. It is often used in decorative applications, such as wall panels or elevator interiors. 5. Bead Blasted Finish: This finish is achieved by propelling small glass beads at high pressure onto the surface of the stainless steel pipe. It creates a uniform, matte appearance and is commonly used in architectural applications, as it provides a unique texture and hides fingerprints well. 6. Passivated Finish: Passivation is a chemical process that removes contaminants from the surface of the stainless steel pipe, improving its corrosion resistance. This finish is commonly used in applications where stainless steel pipes are exposed to harsh environments or chemicals. It is important to note that the choice of finish for stainless steel pipes depends on the specific application and aesthetic preferences. Each finish has its own advantages and disadvantages, so it is essential to consider factors such as durability, maintenance, and the intended use of the pipe before making a decision.
Q:Are stainless steel pipes suitable for automotive applications?
Indeed, automotive applications can benefit from the suitability of stainless steel pipes. Thanks to its remarkable durability and resistance to corrosion, stainless steel proves to be an excellent choice for various automobile components that face challenging conditions, including exhaust systems and catalytic converters. With the added advantages of heat, chemical, and abrasion resistance, stainless steel pipes ensure enduring functionality in automotive settings. Moreover, the lightweight nature and exceptional strength of stainless steel further enhance fuel efficiency and overall vehicle performance.
Q:Are stainless steel pipes resistant to scaling and pitting?
Yes, stainless steel pipes are highly resistant to scaling and pitting. Stainless steel is known for its excellent corrosion resistance properties, which make it highly durable and suitable for various applications, including pipe systems. The presence of chromium in stainless steel forms a protective layer of chromium oxide on the surface, preventing the formation of rust and corrosion. This protective layer makes stainless steel pipes highly resistant to scaling, which is the formation of hard mineral deposits on the inner surface of pipes. Additionally, stainless steel pipes are also resistant to pitting, which is the localized corrosion that occurs as small holes or pits on the pipe's surface. Therefore, stainless steel pipes are an ideal choice for industries or applications where corrosion resistance is crucial, such as water distribution systems, chemical processing plants, and oil and gas pipelines.
Q:What is the difference between 347 and 321 stainless steel pipes?
The chemical composition and intended applications are what set apart the 347 and 321 stainless steel pipes. Titanium is added to the 321 stainless steel as a stabilizing element to prevent the formation of chromium carbide during high-temperature service. This feature allows the steel to be utilized in environments where carbide precipitation is likely, such as in the presence of intergranular corrosion. Consequently, the aerospace industry commonly employs 321 stainless steel pipes in applications involving high temperatures and corrosive environments. On the contrary, the 347 stainless steel incorporates columbium and tantalum as stabilizing elements. These elements also hinder the formation of chromium carbide and offer enhanced resistance to intergranular corrosion when compared to 321 stainless steel. Consequently, the oil and gas industry often makes use of 347 stainless steel pipes in applications where there is a concern for high temperatures and corrosive environments. To summarize, the primary distinction between 347 and 321 stainless steel pipes lies in the presence of columbium and tantalum in 347 stainless steel, which provides superior resistance to intergranular corrosion. This characteristic makes 347 stainless steel pipes more suitable for applications involving corrosive environments and high temperatures.
Q:What is the external coating used for stainless steel pipes?
The external coating used for stainless steel pipes can vary, but common options include epoxy, polyethylene, or polypropylene coatings.
Q:How do stainless steel pipes compare to copper pipes?
Stainless steel pipes are generally more durable, corrosion-resistant, and can withstand higher temperatures compared to copper pipes. Additionally, stainless steel pipes have a longer lifespan and require less maintenance. However, copper pipes have better heat conductivity and are easier to install. The choice between stainless steel and copper pipes depends on the specific application and requirements.
Q:What is the difference between seamless and SAW stainless steel pipes?
Seamless and SAW (Submerged Arc Welding) stainless steel pipes are both used in various industries for transporting fluids or gases, but there are some key differences between the two. 1. Manufacturing Process: The main difference lies in their manufacturing processes. Seamless stainless steel pipes are made by piercing a solid billet to form a hollow tube, while SAW pipes are made by welding multiple layers of steel plates together using a submerged arc welding technique. 2. Appearance: Seamless pipes have a smooth and polished surface, giving them a more aesthetically pleasing look. On the other hand, SAW pipes have visible welding seams, which can be either internal or external. 3. Strength and Durability: Seamless pipes are generally considered to be stronger and more durable than SAW pipes. The absence of welding seams in seamless pipes eliminates any potential weak points, making them less prone to failure under high pressure or extreme temperatures. 4. Size Range: Seamless pipes are available in a wider size range, ranging from small diameters to large ones. SAW pipes, due to the limitations of the welding process, are typically used for larger diameter pipes. 5. Cost: SAW pipes are generally more cost-effective than seamless pipes. The manufacturing process of SAW pipes involves welding multiple plates together, which is less expensive than the process of creating a seamless pipe from a solid billet. 6. Applications: Seamless pipes are commonly used in industries where high pressure and corrosion resistance are crucial, such as oil and gas, petrochemical, and power generation. SAW pipes, due to their larger size range and cost-effectiveness, are often used in infrastructure projects like water supply, sewage systems, and construction. In summary, the main differences between seamless and SAW stainless steel pipes lie in their manufacturing process, appearance, strength, size range, cost, and applications. The choice between the two depends on the specific requirements of the project and the desired characteristics of the pipe.
Q:How do stainless steel pipes compare to PVC pipes?
Stainless steel pipes are generally more durable, have higher heat resistance, and are better suited for high-pressure applications compared to PVC pipes. While PVC pipes are lightweight, cost-effective, and easier to install, they are prone to cracking, chemical reactions, and may not be suitable for certain environments. Therefore, the choice between stainless steel and PVC pipes depends on the specific needs of the application.
Q:Stainless steel heating oven tube after treatment is heating blue will not be red?
Unless they are not stainless steel, or they control the temperature of the heating tube, the continuous heating will be red, after all, the material has not changed. If the outside of the heating tube is ceramic, it won't be red.
Q:Can stainless steel pipes be used for aerospace applications?
Indeed, aerospace applications do employ stainless steel pipes. Renowned for its exceptional strength, endurance, and resistance to corrosion, stainless steel emerges as an optimal material for diverse aerospace components. To be specific, stainless steel pipes frequently find utility in aerospace for fuel and hydraulic systems, as well as for structural support and exhaust systems. The remarkable strength-to-weight ratio of stainless steel enables aircraft designs that are lighter and more fuel-efficient. Moreover, the ability of stainless steel to withstand high temperatures and extreme conditions renders it well-suited for aerospace applications where performance and reliability are paramount.

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