• Stainless Duplex  Seamless  Steel  Pipe System 1
  • Stainless Duplex  Seamless  Steel  Pipe System 2
  • Stainless Duplex  Seamless  Steel  Pipe System 3
Stainless Duplex  Seamless  Steel  Pipe

Stainless Duplex Seamless Steel Pipe

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
100 m.t.
Supply Capability:
3000 m.t./month

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Product Description:

1、Structure of Stainless Duplex Seamless Steel Pipe 31500 Description:

    Duplex Stainless steel pipe and tubing are used for a variety of reasons: to resist corrosion and oxidation, to resist high temperatures, for cleanliness and low maintenance costs, and to maintain the purity of materials which come In contact with stainless. The inherent characteristics of stainless steel permit the design of thin wall piping systems without fear of early failure due to corrosion.



2、Main Features of the Duplex Seamless Steel Pipe 31500: 

 

• High manufacturing accuracy

• High strength

• Small inertia resistance

• Strong heat dissipation ability

• Good visual effect

•Reasonable price



3、Duplex Seamless Steel Pipe 31500 Images:

Stainless Duplex Seamless Steel Pipe 31500


Stainless Duplex Seamless Steel Pipe 31500


Stainless Duplex Seamless Steel Pipe 31500




4Duplex Seamless Steel Pipe 31500 Specification:


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.

  • Eddy Current Testing

  • O.P Testing

Radiography Testing

  • Corrosion Testing

  • Micro Testing

Macro Testing

  • IGC Testing

  • Ultrasonic testing

Liquid Penetrate testing




5、FAQ of Duplex Seamless Steel Pipe 31500: 


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:How are steel pipes made?
Steel pipes are made through a process called seamless or welded pipe manufacturing. In seamless manufacturing, a solid steel billet is heated and pierced to form a hollow tube. It is then stretched and rolled to the desired diameter and wall thickness. Welded pipes are made by bending and welding a steel plate or strip to form a cylindrical shape. The welded seam is then heat-treated to ensure its strength and durability. Both processes involve subsequent finishing and inspection to meet the required specifications and quality standards.
Q:What are the different methods of insulation for steel pipes?
There are several methods of insulation for steel pipes, including foam insulation, fiberglass insulation, mineral wool insulation, and polyurethane insulation. These methods help to prevent heat loss or gain, protect against corrosion, and reduce condensation on the pipes.
Q:How do you calculate the pipe pressure drop for steel pipes?
To calculate the pressure drop in steel pipes, you can use the Darcy-Weisbach equation, which takes into account factors such as the pipe diameter, length, roughness, and the fluid flow rate. By plugging these variables into the equation, you can determine the pressure drop experienced by the fluid as it flows through the steel pipe.
Q:What does cathodic protection of steel tubes mean?
There are two ways of cathodic protection: sacrificial anode, cathodic protection and impressed current cathodic protection.Sacrificial anode: connect a living metal or alloy to a protective metal to form a galvanic cell. The active metal replaces the protected metal to lose electrons so that the protected metal is not corroded.
Q:How are steel pipes used in the construction of stadiums?
Steel pipes are used in the construction of stadiums for various purposes such as structural support, plumbing, and drainage systems. They are commonly used to create the framework and support structures for the stadium's roof, stands, and other architectural elements. Additionally, steel pipes are also utilized in the installation of plumbing systems for supplying water and gas, as well as for drainage systems to manage wastewater and rainwater. Overall, steel pipes play a crucial role in providing strength, durability, and functionality to stadiums during their construction.
Q:Can steel pipes be used for conveying gases?
Yes, steel pipes can be used for conveying gases. Steel pipes are commonly used in various industries, including oil and gas, petrochemical, and construction, for transporting various types of gases such as natural gas, air, and hydrogen. Steel pipes offer several advantages for gas transportation. They are strong and durable, able to withstand high pressure and temperature conditions. Steel pipes also have excellent resistance to corrosion and can effectively prevent gas leakage, ensuring the safety and reliability of the gas transportation system. Additionally, steel pipes have a smooth internal surface, which minimizes the frictional resistance and allows for efficient gas flow. Overall, steel pipes are a reliable and widely-used option for conveying gases in various applications.
Q:How are steel pipes tested for quality assurance?
Steel pipes are tested for quality assurance through various methods, such as visual inspection, dimensional checks, chemical composition analysis, mechanical property testing, and non-destructive testing techniques like ultrasonic or magnetic particle inspection. These tests ensure that the pipes meet the required specifications, performance standards, and are free from defects or flaws, ensuring their durability and reliability in various applications.
Q:What are the different types of coatings used for external protection of steel pipes?
There are several types of coatings commonly used for the external protection of steel pipes, including fusion bonded epoxy (FBE) coatings, three-layer polyethylene (3LPE) coatings, three-layer polypropylene (3LPP) coatings, and coal tar enamel (CTE) coatings. Each of these coatings provide different levels of corrosion resistance and durability, depending on the specific requirements of the project or application.
Q:There are multiple welded galvanized steel pipe outer diameter 108mm wall thickness 4mm length of 6 meters
Galvanized steel pipe wall thickness weight outer diameter 108mm 4mm 6 meters in length is about 10.26*6*1.06=65 kg.Kg/m= (outside diameter mm-, wall thickness mm) * wall thickness mm*0.02466= (108-4) *4*0.02466=10.26 kg / MBecause of galvanizing, the weight is heavier than that of ordinary welded pipe 3%~6%.
Q:What are the different types of steel pipe coatings for corrosion protection?
There are several types of steel pipe coatings used for corrosion protection, including epoxy coatings, polyethylene coatings, zinc coatings, and coal tar coatings. Each coating offers different levels of protection and is chosen based on the specific application and environmental conditions.

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