Welding of duplex stainless steel pipe with good performance
- Ref Price:
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- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 20 m.t.
- Supply Capability:
- 4000 m.t./month
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Detail infomation
Standards: ASTM/ASME A789/SA789, A790/SA790,A450,A530
Material: UNS S31803(Cr22Ni5Mo3/1.4462)/2205,UNS S32750(1.4410),UNS S31500(Cr18NiMo3Si2),
UNS32760(1.4501)
Chemical Composition
Grade | C max | Si max | Mn max | P max | S max | Cr | Ni | Mo | N |
UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Physical Properties
Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
UNS S32750 | 550 | 800 | 15 | 20 |
UNS S31803 | 450 | 620 | 25 | 20 |
UNS S31500 | 440 | 630 | 30 | 20 |
Supplementary Testing :
we also carry out on the manufactured products supplementary testing.
Radiography Testing |
Macro Testing |
Liquid Penetrate testing |
- Q:What is the difference between seamless and spiral welded stainless steel pipes?
- The main difference between seamless and spiral welded stainless steel pipes lies in their manufacturing process and structural characteristics. Seamless stainless steel pipes are produced by piercing a solid billet or bar of stainless steel and then rolling it into a hollow shape. This process does not involve any welding and results in a smooth and seamless pipe. Seamless pipes are typically used in high-pressure and high-temperature applications where strength and corrosion resistance are crucial. They are known for their uniformity, precision, and ability to withstand extreme conditions. On the other hand, spiral welded stainless steel pipes are manufactured by continuously rolling and welding a coiled strip of stainless steel. The strip is formed into a spiral shape and then welded along the seam. This process allows for the production of large diameter pipes and is more cost-effective compared to seamless pipes. Spiral welded pipes are commonly used for low-pressure and low-temperature applications, such as water and gas transportation, as they are less resistant to internal pressure and have a rougher surface compared to seamless pipes. In terms of structural characteristics, seamless stainless steel pipes have a more uniform and consistent wall thickness, resulting in enhanced strength and durability. They also have better dimensional accuracy and smoother internal surfaces, which reduces friction and improves flow efficiency. This makes seamless pipes suitable for industries such as oil and gas, petrochemicals, and power generation, where reliability and performance are paramount. On the other hand, spiral welded stainless steel pipes have a varying wall thickness due to the welding process, which can result in a weaker pipe compared to seamless ones. However, spiral welded pipes have the advantage of being able to withstand higher external pressures and bending forces due to their spiral shape. They are also easier to manufacture and can be produced in longer lengths, reducing the need for additional joints and connections. In conclusion, the choice between seamless and spiral welded stainless steel pipes depends on the specific requirements of the application. Seamless pipes offer superior strength, precision, and corrosion resistance, making them suitable for high-pressure and high-temperature applications. On the other hand, spiral welded pipes are more cost-effective, can be produced in large diameters, and are suitable for low-pressure and low-temperature applications.
- Q:Are stainless steel pipes suitable for architectural applications?
- Indeed, architectural applications are well-suited for stainless steel pipes. This material, known for its durability and resistance to corrosion, can endure even the harshest environmental conditions, making it an ideal option for architectural projects. Notably, it is frequently utilized in structural applications, such as handrails, guardrails, and balustrades, owing to its robustness and attractive appearance. Moreover, stainless steel pipes are highly versatile, allowing for easy shaping and welding to create distinctive designs and structures. Furthermore, they require minimal maintenance and can be polished to a brilliant shine, thereby enhancing the overall aesthetic of architectural projects. In summary, stainless steel pipes are an exceptional choice for architectural applications due to their durability, resistance to corrosion, versatility, and aesthetic appeal.
- Q:How do you join stainless steel pipes to other materials?
- One common method to join stainless steel pipes to other materials is by using welding techniques such as TIG (tungsten inert gas) or MIG (metal inert gas) welding. These welding methods create a strong and durable bond between the stainless steel pipes and the desired material. Additionally, other methods like threaded connections, compression fittings, or flanges can also be used depending on the specific application and requirements.
- Q:What are the differences in the properties of hot-rolled and cold-rolled stainless steel tubes?
- Stainless steel tube with hot and cold points, hot rolling is made by stainless steel tube billet heated to red state, through processing a mold, which is cold-rolled stainless steel pipe billet collocation through different mould at room temperature, finally by drawing rolling method, stainless steel tube working together the size of the need to.
- Q:Can stainless steel pipes be threaded with NPT threads?
- Yes, stainless steel pipes can be threaded with NPT (National Pipe Thread) threads. NPT is a widely used standard for pipe threads in the United States, and it is suitable for both stainless steel and other materials. However, it is important to note that stainless steel has a higher strength and hardness compared to other materials, which may require more care and attention during the threading process. Additionally, it is recommended to use lubricants or cutting fluids specifically designed for stainless steel to ensure a smooth and accurate threading operation.
- Q:Can stainless steel pipes be cold worked?
- Yes, stainless steel pipes can be cold worked. Cold working is a process in which the metal is deformed at room temperature, typically through processes like bending, drawing, or rolling. Stainless steel's excellent mechanical properties and ductility make it well-suited for cold working, allowing for the creation of complex shapes and designs while retaining its strength and corrosion resistance.
- Q:How do you calculate the pipe volume for a specific application?
- To calculate the pipe volume for a specific application, you need to consider a few key parameters. Firstly, you need to determine the pipe's inner diameter (ID) or outer diameter (OD), depending on the available information. The diameter is typically measured in inches or millimeters. Next, you need to measure the length of the pipe, which can be done in feet or meters. Once you have the diameter and length, you can use the formula for calculating the volume of a cylinder to find the pipe volume. The formula is V = π * r^2 * h, where V is the volume, π is a mathematical constant approximately equal to 3.14159, r is the radius of the pipe (equal to half the diameter), and h is the length of the pipe. If you have the ID, you can directly use the radius as half of the ID. However, if you have the OD, you need to subtract the pipe's wall thickness from the OD to find the ID and then calculate the radius. After substituting the values into the formula, you can solve for the pipe volume. The resulting volume will be in cubic inches or cubic meters, depending on the units used for diameter and length.
- Q:What are the different types of stainless steel pipe caps?
- There are various types of stainless steel pipe caps, including threaded caps, socket weld caps, butt weld caps, and compression caps.
- Q:Can stainless steel pipes handle high-velocity fluid flow?
- Yes, stainless steel pipes are capable of handling high-velocity fluid flow due to their excellent strength, durability, and resistance to corrosion.
- Q:How do stainless steel pipes compare to other materials like copper or PVC?
- Stainless steel pipes have several advantages over other materials such as copper or PVC. Firstly, stainless steel is highly resistant to corrosion and rust, making it suitable for various applications, especially in environments with high moisture or chemical exposure. Copper pipes, on the other hand, are susceptible to corrosion over time and may require additional protective coatings or treatments. Secondly, stainless steel pipes have excellent strength and durability, allowing them to withstand high pressure and temperature conditions. PVC pipes, although lightweight and easy to install, are not as strong as stainless steel and may crack or deform under extreme conditions. Another advantage of stainless steel pipes is their ability to handle a wide range of fluids, including corrosive substances and high-temperature liquids. PVC pipes, in contrast, are limited in their compatibility and may not be suitable for certain applications that require resistance to chemicals or extreme temperatures. Furthermore, stainless steel pipes offer superior fire resistance compared to PVC pipes, which are highly flammable and release toxic fumes when exposed to fire. This makes stainless steel pipes a safer option, especially in buildings or industries where fire safety is crucial. Lastly, stainless steel pipes have a longer lifespan compared to copper or PVC pipes. While copper pipes may develop leaks or pinholes over time, and PVC pipes may become brittle and crack, stainless steel pipes are designed to last for decades with minimal maintenance. In summary, stainless steel pipes are a reliable and durable choice for various applications due to their corrosion resistance, strength, versatility, fire resistance, and long lifespan. They outperform copper and PVC pipes in terms of durability, compatibility, safety, and overall performance, making them an excellent choice for a wide range of industries and applications.
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Welding of duplex stainless steel pipe with good performance
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 20 m.t.
- Supply Capability:
- 4000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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