• Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 System 1
  • Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 System 2
  • Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 System 3
Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008

Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008

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Loading Port:
Ningbo
Payment Terms:
TT OR LC
Min Order Qty:
25 m.t.
Supply Capability:
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≤CrNiMoCu≤N
S32750((SAF2507) 00Cr22Ni7Mo4N0.031.200.800.0200.03524.0/ 26.06.0/ 8.03.0/ 5.00.500.24/ 0.32
S31803(SAF2205)

 

00Cr22Ni5Mo3N
0.032.001.00.020.03021.0/ 23.04.50/ 6.502.50/ 3.50
0.08/ 0.20
S31500(3RE60)

 

00Cr18Ni5Mo3Si2
0.031.2/ 2.001. 4/ 2.000.0300.03018.0/ 19.04.25/ 5.252.50/ 2.00
0.05/ 0.10


Mechanical Properties of duplex pipe:


 Steel Grade
Heat Treatment Temperature ℃Ab(MPa)≥As(MPa)≥∮≥brinellrockwell
S32750(SAF2507)

 

00Cr22Ni5Mo3N
1025-1125 water
8005501531032
S31803(SAF2205)

 

00Cr22Ni5Mo3N
1020-11006204502529030.5
S31500(3RE60)

 

00Cr18Ni5Mo3Si2
980-10406304403029030.5


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:

 

How 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.


How 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.

Why 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:Can stainless steel pipes be used for underground sewage systems?
Certainly! Underground sewage systems can indeed utilize stainless steel pipes. Due to its exceptional durability and resistance to corrosion, stainless steel is an ideal material for underground applications that frequently encounter moisture and chemicals. It can effectively endure the demanding conditions of sewage systems, including the erosive properties of wastewater and the pressure exerted by the soil. Moreover, stainless steel pipes boast an extensive lifespan, minimizing the necessity for frequent replacements and upkeep. Nevertheless, it is crucial to carefully assess the unique prerequisites and regulations of the local sewage system, and seek advice from experts to guarantee appropriate installation and compatibility with other system components.
Q:Can stainless steel pipes be used for wastewater treatment ponds?
Indeed, wastewater treatment ponds can employ stainless steel pipes. Renowned for their resistance to corrosion, durability, and capacity to endure severe conditions, stainless steel pipes prove well-suited for such usage. These attributes render them appropriate for wastewater treatment ponds, which frequently encounter chemicals, moisture, and other corrosive elements. Moreover, stainless steel pipes facilitate easy cleaning and maintenance, essential factors for preserving the efficiency and efficacy of the wastewater treatment procedure.
Q:How can stainless steel and copper pipe be welded?
Prepare a brass wire cleaning flux of base metal 3/4 stainless steel tube 5/8 copper rust (specific parent material specification is not clear to me) welding tools
Q:Can stainless steel pipes be insulated?
Indeed, it is possible to insulate stainless steel pipes. Insulation is frequently employed on pipes in order to prevent the loss or gain of heat, and stainless steel pipes are not exempt from this practice. The insulation of stainless steel pipes offers numerous advantages, including the reduction of energy expenses, prevention of condensation, and maintenance of the fluid's temperature within the pipe. Diverse insulation materials, such as fiberglass, foam, or mineral wool, can be utilized to insulate stainless steel pipes, depending on the specific requirements of the given application. The insulation of stainless steel pipes is a widespread procedure in industries such as oil and gas, chemical processing, and HVAC systems.
Q:What are the different types of stainless steel pipe supports?
There are several types of stainless steel pipe supports, including pipe hangers, pipe clamps, pipe saddles, and pipe brackets. These supports are designed to securely hold and stabilize pipes in various applications and ensure proper alignment and distribution of weight. They come in different shapes, sizes, and configurations to accommodate different pipe diameters and mounting requirements.
Q:Are stainless steel pipes suitable for chemical processing?
Yes, stainless steel pipes are highly suitable for chemical processing due to their excellent corrosion resistance and ability to withstand high temperatures and pressures. They are also hygienic, durable, and have low maintenance requirements, making them a preferred choice for handling various chemicals in industries such as pharmaceuticals, petrochemicals, food processing, and more.
Q:How do you calculate the required wall thickness of stainless steel pipes?
To calculate the required wall thickness of stainless steel pipes, several factors need to be taken into consideration. The first factor is the internal pressure the pipe will be subjected to. This pressure is typically indicated in pounds per square inch (psi) or bar. The formula to calculate the required wall thickness due to internal pressure is: t = (P * r) / (2 * S - 1.2 * P) Where: t = required wall thickness P = internal pressure r = pipe radius S = material's allowable stress The second factor is the external pressure the pipe will experience. External pressure is usually caused by factors such as soil or fluid pressure. The formula to calculate the required wall thickness due to external pressure is: t = (P * r) / (2 * S + 1.2 * P) The third factor to consider is the maximum allowable deflection of the pipe. This is important to ensure the pipe does not deform or fail under certain loads. The formula to calculate the required wall thickness due to deflection is: t = (0.0625 * (w * L^3)) / (E * I) Where: t = required wall thickness w = uniform load on the pipe (per unit length) L = effective length of the pipe E = elastic modulus of the material I = moment of inertia of the pipe cross-section Additionally, the material's yield strength should also be considered when calculating the required wall thickness. The yield strength represents the maximum stress the material can withstand before permanent deformation occurs. It is important to choose a material and wall thickness that can handle the expected loads and pressures while maintaining safety and reliability. It is recommended to consult relevant design codes, standards, or engineering handbooks specific to stainless steel pipes for more accurate calculations. Professional advice from a qualified engineer or structural designer is also highly recommended to ensure the accuracy and safety of the design.
Q:Are stainless steel pipes suitable for paper mills?
Yes, stainless steel pipes are suitable for paper mills. Stainless steel is highly resistant to corrosion and can withstand the harsh chemicals and high temperatures typically found in paper mill operations. It is also durable and long-lasting, making it an ideal choice for transporting various fluids and materials within the facility.
Q:What are the different types of stainless steel pipe gaskets?
There are several types of stainless steel pipe gaskets available, including ring gaskets, spiral wound gaskets, and sheet gaskets.
Q:Are stainless steel pipes suitable for underground heating systems?
Indeed, underground heating systems can employ stainless steel pipes as they possess suitability. The reason lies in the fact that stainless steel exhibits remarkable resistance against corrosion and can endure the severe circumstances of subterranean burial. Moreover, this material showcases durability, longevity, and the ability to withstand elevated temperatures and pressures, rendering it an exemplary option for heating systems. Not only that, but stainless steel pipes also offer ease in installation and maintenance, thereby furnishing a dependable and effective resolution for underground heating systems.

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