Stainless Steel Welded Pipe ASTM A358/A312

Stainless Steel Welded Pipe ASTM A358/A312

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1、Structure of /Stainless Steel Welded Pipe ASTM A358/A312Description：

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.. 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：

• High manufacturing accuracy

• High strength

• Small inertia resistance

• Strong heat dissipation ability

3、Stainless Steel Welded Pipe ASTM A358/A312Images：

Stainless Steel Welded Pipe ASTM A358/A312

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	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	6.35	7.92	12.7	17.48
800	32′	812.8		7.9	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		9.53

Tolerances on dimensions table：

Standard	Outside(mm)		Thickness(mm)	Length(mm)
ASTM A312	≤48.26	-0.4	+No special provisions(Unspecified)-12.50%	Appoint LengthDefinite cut length+6.40
	＞48.26~114.30	0		0
	＞114.30~219.08	0.8
	＞219.08~457.20	1.6
	＞457~660	-4
	＞660~864	-5
	＞864~1219	-5.6
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
EN 10217-7	D1±1.50% with±0.75mm(min)D2±1.00% with±0.50mm(min)D3±0.75% with±0.30mm(min)		T1±15.00% with±0.60mm(min)T2±12.5% with±0.40mm(min)T3±10.00% with±0.20mm(min)	≤6000 +5.00 -06000~12000 +10.00 -0
	D4±0.5% with±0.10mm(min)		T4±7.50% with±0.15mm(min)
			T5±5.00% with±0.10mm(min)
			EN ISO 1127

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.

Any question, pls feel free to contact us !

Q: How are steel pipes measured and specified?: Several key parameters are used to measure and specify steel pipes. These parameters include the outer diameter (OD), wall thickness, and length of the pipe. The outer diameter is the measurement of the pipe's outside surface from one end to the other. It is typically expressed in millimeters or inches and plays a critical role in determining the pipe's strength and carrying capacity. Different applications require different OD sizes, which can range from a few millimeters to several feet. The wall thickness refers to the distance between the pipe's outer and inner surfaces. It is measured in millimeters or inches and is crucial for determining the pipe's durability and resistance to pressure. Thicker walls can handle higher pressure, making them suitable for applications that require transporting liquids or gases under high pressure. Steel pipes are generally specified in meters or feet for their length. Standard pipe lengths are often 6 or 12 meters (20 or 40 feet), but custom lengths can be requested based on project requirements. It is important to note that longer pipes may require additional support to prevent sagging or structural issues. In addition to these primary measurements, steel pipes may also be specified based on other factors such as material grade, manufacturing standard, and surface finish. Material grade refers to the quality and composition of the steel used in the pipe, determining its strength and corrosion resistance. Manufacturing standards, such as ASTM or API, ensure that the pipes meet specific quality and performance criteria. Surface finish specifications may include factors like galvanized coating, providing protection against corrosion or other specific requirements based on the intended application. Overall, the measurement and specification of steel pipes involve considering the outer diameter, wall thickness, length, material grade, manufacturing standard, and surface finish. These parameters are crucial in determining the suitability of the pipe for various applications and ensuring its performance and durability in different environments.

Q: Stainless steel tube, also known as why tube?: According to the end of the pipe can be divided into light pipe and wire tubeThe tube can be divided into ordinary tube and special thread tube

Q: What is the average lifespan of steel pipes?: The average lifespan of steel pipes can vary depending on various factors such as the quality of the steel used, the environment in which they are installed, and the maintenance and care they receive. However, on average, well-maintained steel pipes can last anywhere from 50 to 100 years or more.

Q: Outside diameter 60, thickness 3.5 seamless steel tube, how many kilograms per meter?: Outside diameter 60mm, thickness 3.5mm seamless steel tube per metre weight: 4.88 kg. When calculating the theoretical weight (Kg/m) per metre of steel tube, the theoretical weight meter of the steel tube can be checked directly, and the formula formula can also be used.

Q: How are steel pipes used in the construction of stadiums?: Steel pipes are commonly used in the construction of stadiums for various purposes such as structural support, plumbing, and drainage systems. They provide strength, durability, and flexibility, making them ideal for constructing grandstands, roofs, and other large-scale structures. Additionally, steel pipes are used for installing plumbing systems to supply water for restrooms, concession stands, and irrigation. They also play a crucial role in the drainage system, allowing for efficient removal of rainwater and preventing flooding in the stadium. Overall, steel pipes are essential components in stadium construction due to their versatility and reliability.

Q: What is the role of steel pipes in sewage systems?: Steel pipes play a crucial role in sewage systems as they are used to transport wastewater and sewage from various sources to treatment plants or disposal areas. Their strength, durability, and resistance to corrosion make them ideal for handling the often harsh and corrosive nature of sewage. Additionally, steel pipes can withstand high pressures and provide a reliable and long-lasting solution for sewage transportation, ensuring the efficient and safe functioning of sewage systems.

Q: Is there a weld on the outer wall of seamless steel tube?: Seamless steel pipe, not seamless steel pipe, seamless steel pipe, welded seam, how can it be called seamless pipe?. Tell you a method: measurement of wall thickness, multi test several points, if each point, that is because it is cold drawn pipe, seamless pipe, hot rolling, wall thickness may% by sample.

Q: Can steel pipes be used for solar energy systems?: Yes, steel pipes can be used for solar energy systems. Steel pipes are often used for the construction of solar water heating systems, solar thermal collectors, and solar panel mounting structures. They are durable, cost-effective, and provide the necessary support for various components of a solar energy system.

Q: What are the common maintenance practices for steel pipes?: Steel pipes require regular inspections, cleaning, and corrosion prevention as part of their maintenance. It is crucial to conduct inspections frequently to detect any signs of damage or wear. These inspections can involve visual assessments and non-destructive testing methods like ultrasonic or magnetic particle inspection. Scheduling inspections ensures early detection of issues, allowing for prompt resolution. Cleaning is also a vital maintenance practice for steel pipes. It involves the removal of dirt, debris, and scale that may accumulate on both the inside and outside of the pipes. Regular cleaning prevents blockages, enhances flow efficiency, and reduces the risk of corrosion. Corrosion prevention plays a significant role in maintaining steel pipes. Different methods, such as applying protective coatings, utilizing cathodic protection systems, or implementing corrosion inhibitors, can be employed to safeguard the pipes. These measures extend the pipes' lifespan and preserve their structural integrity over time. Additional maintenance practices may include repairing or replacing damaged sections of the pipes, maintaining proper insulation to prevent heat loss or gain, and monitoring the pipes for any signs of leakage or pressure drops. In summary, regular inspections, cleaning, and corrosion prevention are vital maintenance practices for steel pipes. Implementing these practices prolongs the pipes' lifespan and allows for the identification and resolution of potential issues before they cause significant damage or disruptions.

Q: How do you calculate the pipe thermal expansion coefficient for steel pipes?: In order to calculate the pipe thermal expansion coefficient for steel pipes, it is necessary to take into account both the linear expansion coefficient of the material and the temperature change. The typical linear expansion coefficient for steel is approximately 12 x 10^-6 per degree Celsius. To begin with, establish the initial length of the pipe, which is represented by L0. Then, measure the temperature change, indicated as ΔT. Proceed by multiplying the initial length of the pipe by the linear expansion coefficient and the temperature change: ΔL = L0 * α * ΔT. The resulting value, ΔL, signifies the alteration in length of the steel pipe caused by thermal expansion.

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