Stainless Steel Welded Pipe ASTM A358/A312/A778

Stainless Steel Welded Pipe ASTM A358/A312/A778 System 1

Stainless Steel Welded Pipe ASTM A358/A312/A778

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Loading Port:: Ningbo

Payment Terms:: TT or LC

Min Order Qty:: 25 m.t.

Supply Capability:: 8000 m.t./month

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1、Structure of Stainless Steel Welded Pipe ASTM A358/A312/A778 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 ASTM A358/A312/A778：

• High manufacturing accuracy

• High strength

• Small inertia resistance

• Strong heat dissipation ability

• Good visual effect

•Reasonable price

3、Stainless Steel Welded Pipe ASTM A358/A312/A778 Images：

Stainless Steel Welded Pipe ASTM A358/A312/A778

4、Stainless Steel Welded Pipe ASTM A358/A312/A778 Specification：

Size：

Outside diameter		Outside	Thickness
Outside diameter		Outside	SCH 5S	SCH 10S	SCH 20S	SCH 40S
(A)	(B)	mm	mm	mm	mm	mm
350	14′	355.6	3.96	4.78	7.92	11.13
400	16′	406.4	4.19	4.78	7.92	12.7
450	18′	457.2	4.19	4.78	7.92	14.27
500	20′	508.0	4.78	5.54	9.53	15.09
550	22′	558.8	4.78	5.54	9.53	15.09
600	24′	609.6	5.54	6.35	9.53	17.48
650	26′	660.4	5.54	7.92	12.7	17.48
700	28′	711.2	5.54	7.92	12.7	17.48
750	30′	762.0	6.35	7.92	12.7	17.48
800	32′	812.8		7.90	12.7	17.48
850	34	863.6		7.92	12.7	17.48
900	36′	914.4		7.92	12.7	19.05
1000	40′	1016.0		9.53

Tolerances on dimensions table：

Standard	Outside(mm)		Thickness(mm)	Length(mm)
ASTM A312	≤48.26	+0.40 -0.80	+No special provisions(Unspecified)-12.50%	Appoint LengthDefinite cut length+6.40 -0
	＞48.26~114.30	+0.80 -0.80
	＞114.30~219.08	+1.60 -0.80
	＞219.08~457.20	+2.40 -0.80
	＞457~660	+3.20/-0.80
	＞660~864	+4.00/-0.80
	＞864~1219	+4.48/-0.80
JIS G3459	＜30.00 ±0.30≥30.00 ±1.00%		＜2.00 ±0.20≥2.00 ±10%	Appoint LengthDefinite cut Length
GB/T 12771	＜13.00 ±0.2013.00~40.00 ±0.30≥40.00 ±0.80%		≤4.00 +0.50 -0.60＞4.00 ±10%	+20.00-0
EN 10217-7	D1±1.50% with±0.75mm(min)D2±1.00% with±0.50mm(min)D3±0.75% with±0.30mm(min) D4±0.5% with±0.10mm(min)		T1±15.00% with±0.60mm(min)T2±12.5% with±0.40mm(min)T3±10.00% with±0.20mm(min) T4±7.50% with±0.15mm(min) T5±5.00% with±0.10mm(min) EN ISO 1127	≤6000 +5.00 -06000~12000 +10.00 -0

5、FAQ of Stainless Steel Welded Pipe ASTM A358/A312/A778：

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:Are stainless steel pipes suitable for swimming pool installations?: Yes, stainless steel pipes are suitable for swimming pool installations. Stainless steel is highly resistant to corrosion and can withstand the harsh chemicals and conditions typically found in swimming pool environments. It is also durable and requires minimal maintenance, making it an excellent choice for long-lasting and reliable pool plumbing systems.

Q:Can stainless steel pipes be used for gas pipelines?: Indeed, gas pipelines can utilize stainless steel pipes. Stainless steel, renowned for its exceptional durability and resistance to corrosion, proves to be an ideal material for transporting a wide range of gases, including natural gas and propane. Moreover, stainless steel pipes possess remarkable tensile strength, enabling them to endure the demanding conditions of high pressure and temperature frequently encountered in gas pipelines. Furthermore, stainless steel demonstrates non-reactivity, thereby guaranteeing the integrity and safety of the pipeline system by preventing any interaction with the transported gases. Ultimately, with its strength, corrosion resistance, and capability to withstand high-pressure environments, stainless steel pipes emerge as a dependable choice for gas pipelines.

Q:How do you calculate the heat transfer coefficient of stainless steel pipes?: The heat transfer coefficient of stainless steel pipes can be determined through a variety of methods, including empirical correlations and theoretical calculations. One popular empirical correlation is the Dittus-Boelter equation, which establishes a relationship between the heat transfer coefficient, Reynolds number, and Prandtl number. The equation is as follows: Nu = 0.023 * Re^0.8 * Pr^0.4 In this equation, Nu represents the Nusselt number, Re represents the Reynolds number, and Pr represents the Prandtl number. The Nusselt number is a dimensionless quantity that signifies the ratio of convective to conductive heat transfer. To calculate the Reynolds number, the following formula is used: Re = (ρ * v * D) / μ Here, ρ denotes the fluid's density, v represents the fluid's velocity, D is the hydraulic diameter of the pipe, and μ represents the fluid's dynamic viscosity. The Prandtl number can be determined using the equation: Pr = μ * Cp / k In this equation, Cp stands for the specific heat capacity of the fluid, while k represents the fluid's thermal conductivity. Once the Reynolds and Prandtl numbers are determined, they can be substituted into the Dittus-Boelter equation to calculate the Nusselt number. Finally, the heat transfer coefficient can be obtained by multiplying the Nusselt number by the fluid's thermal conductivity and dividing it by the hydraulic diameter of the pipe: h = (Nu * k) / D In this equation, h represents the heat transfer coefficient. It is essential to note that these calculations are based on assumptions and empirical correlations. Actual heat transfer coefficients may vary due to factors such as pipe roughness, fluid properties, and flow conditions. Therefore, it is advised to consult relevant heat transfer literature or conduct experimental studies for more precise results.

Q:What is the maximum pressure rating for stainless steel pipes?: The maximum pressure rating for stainless steel pipes can vary depending on several factors such as the grade of stainless steel, the diameter and wall thickness of the pipe, and the specific application or industry requirements. However, stainless steel pipes are known for their high strength and corrosion resistance, making them suitable for high-pressure applications. In general, stainless steel pipes can have maximum pressure ratings ranging from a few hundred psi (pounds per square inch) to several thousand psi. It is crucial to consult the appropriate industry standards, codes, and specifications or consult with a qualified engineer or manufacturer to determine the specific maximum pressure rating for a particular stainless steel pipe in a given application.

Q:What is the difference between Schedule 5 and Schedule 10 stainless steel pipes?: Schedule 5 and Schedule 10 stainless steel pipes find frequent use across various industries and applications, though they possess distinct dissimilarities. The primary disparity resides within their wall thickness. While Schedule 5 stainless steel pipes boast a slimmer wall thickness, Schedule 10 stainless steel pipes possess a thicker wall. Consequently, Schedule 5 pipes exhibit a greater internal diameter, facilitating a more substantial flow of fluids or gases through the conduit. On the contrary, Schedule 10 stainless steel pipes exhibit a reduced internal diameter due to their thicker walls. This renders them more suitable for applications necessitating higher pressure or strength, as the heightened wall thickness grants augmented durability and resistance against external forces. Moreover, the disparate wall thicknesses of Schedule 5 and Schedule 10 pipes influence their weight and cost. Owing to their thinner walls, Schedule 5 pipes weigh less and command a lower price than Schedule 10 pipes. Concerning availability, Schedule 10 stainless steel pipes witness more frequent usage in industrial processes involving high pressure or corrosive environments, such as chemical plants or oil refineries. Conversely, Schedule 5 stainless steel pipes are often employed in applications where the flow of fluids or gases does not encounter extreme pressure, such as plumbing or low-pressure conveying systems. In summary, the principal distinctions between Schedule 5 and Schedule 10 stainless steel pipes lie within their wall thickness, internal diameter, strength, weight, and cost. The choice between the two hinges upon the specific requirements of the application and the level of pressure or durability required.

Q:Is galvanized steel pipe stainless steel pipe?: Galvanized steel pipe is a kind of welded steel pipe, and its essence is hot-dip galvanized coating on the inner and outer surface of welded steel pipe. Hope to be of help to you.

Q:How do you prevent oxidation in stainless steel pipes?: Preventing oxidation in stainless steel pipes can be achieved through several methods. One way to effectively prevent oxidation is by applying a protective coating or finish on the surface of the pipes. Various types of coatings, including paints, epoxy, or polyurethane, can serve as barriers that prevent oxygen from coming into contact with the stainless steel, thus reducing the risk of oxidation. Furthermore, keeping the pipes clean and well-maintained is crucial in preventing oxidation. It is essential to eliminate any accumulated dirt, debris, or corrosive substances from the surface of the pipes. This can be accomplished using mild detergents or specialized cleaning agents specifically designed for stainless steel. Ensuring proper ventilation in the installation area is another preventive measure. Sufficient ventilation helps minimize the presence of moisture or humidity, which can accelerate the oxidation process. Additionally, keeping the pipes dry and avoiding prolonged exposure to water or moisture is vital in preventing oxidation. Lastly, selecting the appropriate grade of stainless steel for the intended application is important. Different grades of stainless steel offer varying levels of resistance to oxidation. For instance, austenitic stainless steel grades like 304 and 316 are highly resistant to oxidation and are commonly used in applications where corrosion resistance is crucial. In conclusion, employing a combination of preventive measures, such as protective coatings, regular cleaning, proper ventilation, and selecting the appropriate stainless steel grade, can effectively prevent oxidation in stainless steel pipes.

Q:Can stainless steel pipes be used in the aerospace industry?: Certainly! Stainless steel pipes have a wide range of applications in the aerospace industry due to their versatility and durability. With exceptional resistance to corrosion, high temperatures, and pressure, stainless steel is an ideal material for various aerospace systems like fuel, hydraulic, and air conditioning systems. Moreover, stainless steel pipes are commonly utilized in aircraft engines, ensuring optimal performance under extreme temperatures. Furthermore, their lightweight nature makes them particularly suitable for aerospace applications where weight reduction is crucial. In conclusion, stainless steel pipes not only meet the rigorous requirements and standards of the aerospace industry but are also extensively employed in various aircraft and spacecraft components.

Q:How much is one ton of stainless steel pipe?: Basically, each shop is not the same, each place is not the same, you can ask more about the goods than three?

Q:Can stainless steel pipes be used for drinking water supply?: Yes, stainless steel pipes can be used for drinking water supply. Stainless steel is a highly durable and corrosion-resistant material, making it a suitable choice for transporting drinking water safely and hygienically. Unlike other materials, stainless steel pipes do not leach harmful chemicals or contaminants into the water, maintaining its quality and purity. Additionally, stainless steel pipes are resistant to bacterial growth, which further ensures the safety of the drinking water.

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