Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008
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- 25 m.t.
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- 5000 m.t./month
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1、Structure of Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 Description：
Stainless steel welded pipe is actually a cover term, covering a wide range of alloy and making them suitable for different attributes that are used in a very wide and large numbers of different industries. Stainless steel pipe is resistant to erosion, highly flexible, powerful, easy to use, and can be done in distinct approaches, which means that more and more stainless steel was used as a construction material for large-scale, high impact buildings. It can be molded, rolling, and it can create amazing shapes to make it perfect, It is used as experimental buildings, The use of steel pipe welding of large stainless steel covers other examples.
2、Main Features of the Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008：
• High manufacturing accuracy
• High strength
• Small inertia resistance
• Strong heat dissipation ability
• Good visual effect
•Reasonable price
3、Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 Images：
4、Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 Specification：
composition of duplex stainless pipe（%）
| Steel grade | C≤ | Mn≤ | Si≤ | S≤ | P≤ | Cr | Ni | Mo | Cu≤ | N |
| S32750((SAF2507) 00Cr22Ni7Mo4N | 0.03 | 1.20 | 0.80 | 0.020 | 0.035 | 24.0/ 26.0 | 6.0/ 8.0 | 3.0/ 5.0 | 0.50 | 0.24/ 0.32 |
| S31803（SAF2205） 00Cr22Ni5Mo3N | 0.03 | 2.00 | 1.0 | 0.02 | 0.030 | 21.0/ 23.0 | 4.50/ 6.50 | 2.50/ 3.50 | 0.08/ 0.20 | |
| S31500（3RE60） 00Cr18Ni5Mo3Si2 | 0.03 | 1.2/ 2.00 | 1. 4/ 2.00 | 0.030 | 0.030 | 18.0/ 19.0 | 4.25/ 5.25 | 2.50/ 2.00 | 0.05/ 0.10 |
Mechanical Properties of duplex pipe：
| Steel Grade | Heat Treatment Temperature ℃ | Ab（MPa）≥ | As（MPa）≥ | ∮≥ | brinell | rockwell |
| S32750（SAF2507） 00Cr22Ni5Mo3N | 1025-1125 water | 800 | 550 | 15 | 310 | 32 |
| S31803（SAF2205） 00Cr22Ni5Mo3N | 1020-1100 | 620 | 450 | 25 | 290 | 30.5 |
| S31500（3RE60） 00Cr18Ni5Mo3Si2 | 980-1040 | 630 | 440 | 30 | 290 | 30.5 |
Details：
Outer Diameter | 6mm--159mm | |||||
Thickness | 0.3mm - 3.0mm | |||||
Length | 6m or as customers' request | |||||
Surface | 180G, 320G, 400G Satin / Hairline 400G, 500G, 600G or 800G Mirror finish | |||||
Application | Decoration construction, upholstery, industry instrument | |||||
Test | Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT | |||||
5、FAQ of Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008：
①How is the quality of your products?
Our products are manufactured strictly according to national and internaional standard, and we take a test on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.
②How about price?
Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.
③Why should you chose us?
Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.
Any question, pls feel free to contact us !
- Q:What is the maximum allowable working pressure for stainless steel pipes?
- The maximum allowable working pressure for stainless steel pipes depends on various factors such as the grade of stainless steel, pipe size, wall thickness, and temperature. It is typically determined using industry standards and codes, such as ASME B31.3 for process piping. Therefore, there is no one-size-fits-all answer to this question and it is important to consult the relevant standards and engineering guidelines for accurate and specific information.
- Q:What is the difference between seamless and spiral welded stainless steel pipes?
- When comparing seamless and spiral welded stainless steel pipes, the key distinction lies in their manufacturing process and structural characteristics. Seamless stainless steel pipes are formed by piercing a solid billet or bar of stainless steel and then rolling it into a hollow shape. This method does not involve any welding and produces a smooth and seamless pipe. Seamless pipes are commonly utilized in high-pressure and high-temperature applications where strength and corrosion resistance are crucial. They are renowned for their uniformity, precision, and ability to withstand extreme conditions. In contrast, spiral welded stainless steel pipes are manufactured by continuously rolling and welding a coiled strip of stainless steel. The strip is shaped into a spiral 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 frequently employed in low-pressure and low-temperature applications like water and gas transportation, as they are less resistant to internal pressure and have a rougher surface compared to seamless pipes. Regarding structural characteristics, seamless stainless steel pipes possess a more consistent and uniform wall thickness, resulting in enhanced strength and durability. They also exhibit better dimensional accuracy and smoother internal surfaces, reducing friction and improving flow efficiency. These qualities make seamless pipes suitable for industries such as oil and gas, petrochemicals, and power generation, where reliability and performance are of utmost importance. 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:How about stainless steel 2520 and 316?
- Their nickel content is different. 2520 contains about 20 nickel, 316 contains about 13 nickel, and contains 2 molybdenum.
- Q:Are stainless steel pipes suitable for geothermal applications?
- Indeed, geothermal applications can benefit greatly from the use of stainless steel pipes. Geothermal systems rely on harnessing the earth's natural geothermal energy, which often necessitates the conveyance of hot fluids like water or steam. When it comes to this purpose, stainless steel pipes are an ideal selection due to their exceptional strength, resistance to corrosion, and ability to endure high temperatures. They possess the capability to withstand the demanding conditions typically found in geothermal environments, including the presence of acidic or corrosive fluids, while exhibiting a lower likelihood of degradation over time compared to other materials. Furthermore, stainless steel pipes boast excellent thermal conductivity, thereby ensuring the efficient transfer of heat in geothermal applications. All in all, one can confidently consider stainless steel pipes as a dependable and long-lasting choice for geothermal systems.
- Q:Can stainless steel pipes be heat treated?
- Indeed, heat treatment is applicable to stainless steel pipes. The procedure entails subjecting the stainless steel pipe to a particular temperature, maintaining it at that temperature for a specific duration, and subsequently cooling it in a controlled manner. This method is commonly employed to modify the mechanical properties of the stainless steel, such as enhancing hardness or bolstering strength. Furthermore, heat treatment can address stress relief and eliminate impurities in the stainless steel pipe. However, it is crucial to acknowledge that not all stainless steel grades can undergo heat treatment, as the composition of the alloy significantly influences its heat treatability. Therefore, it is advisable to consult the manufacturer or a metallurgical expert to ascertain the appropriate heat treatment process for a specific stainless steel pipe.
- Q:Stainless steel pipe drilling?
- Stainless steel itself is not high hardness, but it is difficult to processing reasons:Because the stainless steel contains C element is low, hardness is not high, and not easy to deformation, plasticity is poor, this is the iron and steel organization grain concentration caused by. This allows the drill to increase its viscosity when drilling, and it is not easy to chip out. The drill is easy to burn at this time. Through the practice comparison, we know that the opening of 135 degree bit is much easier when the control speed is 300-500 to /min. It is much easier than the drilling of 118 degree hole on the same material.
- Q:What are the different standards and specifications for stainless steel pipes?
- There are several different standards and specifications for stainless steel pipes, depending on their intended use and the industry they are being used in. Some common standards include ASTM A312/A312M, which covers seamless, welded, and heavily cold worked austenitic stainless steel pipes; ASTM A358/A358M, which specifies electric-fusion-welded austenitic chromium-nickel stainless steel pipes; and ASTM A790/A790M, which covers seamless and welded ferritic/austenitic stainless steel pipes. Additionally, there are standards specific to different countries, such as EN 10216-5 in Europe and JIS G3459 in Japan. These standards outline the requirements for dimensions, material composition, mechanical properties, and other characteristics of stainless steel pipes.
- Q:Can stainless steel pipes be used for construction?
- Certainly, construction can utilize stainless steel pipes. Stainless steel, being an incredibly durable and corrosion-resistant material, is well-suited for a wide range of construction applications. It is frequently employed in plumbing systems, water supply lines, and underground piping where the ability to resist corrosion is of utmost importance. Moreover, stainless steel pipes are utilized in the construction of bridges, buildings, and infrastructure projects due to their robustness and capacity to withstand harsh weather conditions. Furthermore, the aesthetic appeal and minimal upkeep requirements of stainless steel make it a preferred choice for architectural designs. In conclusion, stainless steel pipes are a dependable and enduring option for construction purposes.
- Q:What is the difference between 446 and 316 stainless steel pipes?
- The chemical composition and intended use distinguish 446 stainless steel pipes from 316 stainless steel pipes. 446 stainless steel, a heat-resistant alloy, is ferritic and contains chromium, molybdenum, and small amounts of silicon and carbon. This composition grants 446 stainless steel exceptional oxidation resistance at high temperatures, making it suitable for the automotive, power generation, and thermal processing industries. It can withstand temperatures up to 1500°C (2730°F) and displays good corrosion resistance in specific environments. Conversely, 316 stainless steel is an austenitic, corrosion-resistant alloy containing chromium, nickel, and molybdenum. Due to its superior corrosion resistance and ability to endure harsh conditions, it finds wide application in industries such as food processing, pharmaceuticals, marine applications, and chemical processing. Additionally, 316 stainless steel offers good resistance to pitting and crevice corrosion, making it appropriate for chloride-containing environments. In terms of mechanical properties, 446 stainless steel generally exhibits lower tensile strength and hardness compared to 316 stainless steel. However, it compensates for this by providing better high-temperature oxidation resistance. Conversely, 316 stainless steel possesses higher tensile strength and hardness, resulting in superior overall mechanical properties. In conclusion, while both 446 and 316 stainless steel pipes offer corrosion resistance, their chemical composition and specific application areas are the key distinguishing factors. 446 stainless steel is primarily suitable for high-temperature environments, whereas 316 stainless steel is more versatile and extensively employed in various industries due to its superior corrosion resistance properties.
- Q:Can stainless steel pipes be used for irrigation sprinkler systems?
- Yes, stainless steel pipes can be used for irrigation sprinkler systems. Stainless steel is highly resistant to corrosion and rust, making it a durable choice for outdoor applications like irrigation systems. Additionally, stainless steel pipes have excellent strength and can withstand high-pressure conditions, making them suitable for sprinkler systems.
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Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008
- Ref Price:
-
- Loading Port:
- Ningbo
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 5000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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