Stainless Duplex Seamless Steel Pipe System 1

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

4、Duplex 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

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：

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: Does the seamless steel pipe need rust removal?: The main use of steel wire brush and other tools to polish the surface of the steel, you can remove loose or tilted skin, rust, welding slag and so on. Manual tool derusting can reach Sa2 level, power tools derusting can reach Sa3 level, if the surface of the steel attached to the solid oxide sheet, tool rust removal effect is not ideal, can not reach the corrosion protection requirements of the anchor depth.

Q: Are steel pipes suitable for underground mining operations?: Yes, steel pipes are suitable for underground mining operations. Steel pipes are known for their durability, strength, and resistance to corrosion, making them ideal for use in harsh underground mining environments. They can withstand high pressure and are capable of transporting various substances, such as water, air, or mining materials, with reliability and efficiency. Additionally, steel pipes can be customized to meet specific mining requirements, ensuring their suitability for underground operations.

Q: What is the difference between carbon steel and alloy steel pipes?: Carbon steel pipes and alloy steel pipes are two distinct types of steel pipes, characterized by their composition and properties. Carbon steel pipes, consisting mainly of carbon and iron, incorporate small quantities of other elements such as manganese, silicon, and copper. These pipes are renowned for their robustness and durability, making them a favored option in industries like construction, oil and gas, and automotive. Carbon steel pipes are relatively low-priced and exhibit commendable resistance to corrosion. In contrast, alloy steel pipes are produced by introducing additional alloying elements to carbon steel. These alloying elements encompass chromium, nickel, molybdenum, vanadium, and others. The incorporation of these elements augments the steel's properties, resulting in increased strength, superior corrosion resistance, and enhanced heat resistance. Alloy steel pipes are commonly employed in applications involving high temperatures and pressures, such as power plants, refineries, and chemical plants. Regarding cost, alloy steel pipes generally incur higher expenses compared to carbon steel pipes due to the inclusion of supplementary alloying elements. Nevertheless, the added advantages in terms of performance and longevity often justify the elevated cost. To summarize, the primary distinction between carbon steel and alloy steel pipes lies in their composition and properties. Carbon steel pipes primarily consist of carbon and iron, while alloy steel pipes contain additional alloying elements to enhance their properties. Carbon steel pipes are celebrated for their strength and affordability, whereas alloy steel pipes offer improved strength, corrosion resistance, and heat resistance.

Q: How are steel pipes measured and sized?: Steel pipes are measured and sized based on their diameter and wall thickness. The standard unit for measuring steel pipes is the nominal pipe size (NPS), which is a North American set of standard sizes for pipes. The NPS is based on the internal diameter (ID) of the pipe, while the wall thickness is specified by the schedule number. The schedule number indicates the thickness of the pipe walls, with higher numbers representing thicker walls. Additionally, steel pipes can also be measured and sized using outside diameter (OD) and wall thickness in millimeters or inches.

Q: How do you calculate the buoyancy of submerged steel pipes?: In order to calculate the buoyancy of submerged steel pipes, one must take into account Archimedes' buoyancy principle. According to this principle, the force exerted on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. To calculate the buoyant force, it is necessary to determine the volume of fluid displaced by the submerged steel pipe. This can be done by multiplying the cross-sectional area of the pipe by the length of the submerged portion. Next, it is important to ascertain the density of the fluid in which the steel pipe is submerged. This information can be obtained from the properties of the fluid or by referring to known values. Once the volume and density of the fluid have been determined, the weight of the fluid displaced by the submerged pipe can be calculated using the equation: weight = volume × density × acceleration due to gravity. Finally, the buoyant force can be calculated by multiplying the weight of the displaced fluid by the acceleration due to gravity. This will yield the upward force exerted on the submerged steel pipe by the fluid. When accurately calculating the buoyancy of submerged steel pipes, it is crucial to take into account additional factors, such as the weight of the pipe itself, any attached equipment or coatings, and the specific conditions of the fluid in which it is submerged.

Q: What is the difference between steel pipes and HDPE pipes?: Steel pipes are made from a durable alloy of iron and carbon, while HDPE pipes are made from high-density polyethylene, a strong and flexible plastic material. Steel pipes are generally heavier and more rigid, making them suitable for high-pressure applications and structural support. HDPE pipes, on the other hand, are lighter, more flexible, and resistant to corrosion, making them ideal for underground and aboveground installations in various industries including water supply, gas distribution, and sewage systems.

Q: The outer circle of a seamless steel pipe 50 head into the outer circle of the 40 to close: That is, according to the production process of different classification, different from hot rolling (expansion) pipe. In the process of expanding the tube or raw material tube, it is processed by multiple cold drawing, usually on single chain or double chain cold drawn machine of 0.5 ~ 100T. Cold rolled steel pipe (DIAL) in general, steel pipe for low and medium pressure boiler tube, high-pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, oil cracking tube, machining pipe, thick wall pipe, small diameter and cold drawn steel tube also includes other tubes, carbon thin-walled steel, alloy thin-walled steel pipe, stainless steel pipe, special-shaped wall steel pipe. The outside diameter of cold drawn steel tube wall thickness to 6mm, to 0.25mm, to 5mm diameter thin-walled tube wall thickness is less than 0.25mm in size, accuracy and surface quality were significantly better than the hot (expanding) tube, but by the process control, its diameter and length are limited.

Q: Can steel pipes be used for drinking water supply?: Drinking water supply can indeed utilize steel pipes. For water distribution systems, steel pipes are widely employed owing to their robustness, longevity, and capacity to endure high pressures. Nevertheless, it is crucial to highlight that the steel employed in these pipes must be purposefully engineered and endorsed for potable water applications. This ensures the water remains uncontaminated by any detrimental substances. Furthermore, regular inspections and appropriate upkeep are imperative to avert the development of rust or corrosion, which may impact water quality.

Q: How are steel pipes protected from corrosion in corrosive environments?: Steel pipes are protected from corrosion in corrosive environments through various methods such as coating the pipes with corrosion-resistant materials like epoxy or zinc, using cathodic protection techniques, and implementing regular inspections and maintenance to identify and address any potential corrosion issues.

Q: How are steel pipes protected against rust and corrosion?: Steel pipes are protected against rust and corrosion through various methods such as applying protective coatings, galvanizing, and utilizing corrosion-resistant alloys.

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