Stainless Steel Welded Pipe ASTM A358 and A312

Stainless Steel Welded Pipe ASTM A358 and A312 System 1

Stainless Steel Welded Pipe ASTM A358 and 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. 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.

2、Main Features of the Stainless Steel Welded Pipe ASTM A358 and A312：

• High manufacturing accuracy

• High strength

• Small inertia resistance

3、Stainless Steel Welded Pipe ASTM A358 and A316Images：

Stainless Steel Welded Pipe ASTM A358 and A312

4、Stainless Steel Welded Pipe ASTM A358 and A312 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

Tolerances on dimensions table：

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 and A312：

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: How are steel pipes threaded for easy installation?: Steel pipes are threaded for easy installation using a process called threading. Threading involves cutting grooves or ridges into the pipe to create a spiral pattern. This pattern allows the pipe to easily connect with other threaded components, such as fittings or valves. There are two common methods used to thread steel pipes: manual threading and machine threading. In manual threading, a handheld tool called a pipe die is used. The die is equipped with sharp teeth that cut into the pipe as it is rotated. The pipe is secured in a vise or held firmly by hand, and the die is applied to the end of the pipe. The die is then rotated around the pipe, creating the threaded grooves. This process requires skill and precision to ensure accurate and properly aligned threads. Machine threading, on the other hand, is a more automated process. It involves the use of a pipe threading machine, which is equipped with a die head that automatically cuts the threads into the pipe. The machine secures the pipe and rotates it while the die head moves along the length of the pipe, cutting the threads. Machine threading is faster and more efficient than manual threading, making it ideal for large-scale production or projects. Regardless of the method used, it is crucial to ensure that the threads are clean and free from debris or burrs. This is important for easy installation and to prevent leaks or other complications. After threading, the pipes are typically inspected to ensure the threads meet the required specifications. Threading steel pipes allows for easy installation as the threaded ends can be easily screwed into fittings, valves, or other pipes with compatible threads. This threaded connection creates a tight seal, making it suitable for various applications, such as plumbing, gas lines, or industrial piping systems.

Q: Are steel pipes suitable for nuclear power plants?: Steel pipes are an ideal choice for nuclear power plants. This is because steel is a commonly used material in the construction of these plants, thanks to its exceptional mechanical properties, high strength, and durability. Various applications in nuclear power plants rely on steel pipes, including the transportation of cooling water, hot gases, and steam. The steel used in nuclear power plants undergoes careful selection and testing to meet strict safety regulations and quality standards. This is crucial because these pipes must have outstanding resistance to corrosion and high-temperature environments. They are exposed to harsh conditions such as high pressure, high temperatures, and radioactive materials. Moreover, steel pipes have a long lifespan and require minimal maintenance. This makes them a cost-effective option for nuclear power plants. They can endure extreme conditions, ensuring the plant's safe and reliable operation. Additionally, steel pipes can be easily fabricated, installed, and repaired, which is vital for the efficient functioning of a nuclear power plant. In summary, steel pipes are highly suitable for nuclear power plants due to their strength, durability, resistance to corrosion, and ability to withstand extreme conditions.

Q: What is the difference between steel pipes and plastic pipes?: The main difference between steel pipes and plastic pipes lies in their material composition. Steel pipes are made from a durable and strong metal alloy, while plastic pipes are composed of various types of plastic polymers. This difference in materials leads to variations in their properties and usage. Steel pipes are known for their high strength, resistance to extreme temperatures and pressures, and longevity, making them suitable for applications requiring robustness, such as in industrial settings or underground pipelines. On the other hand, plastic pipes are lightweight, flexible, and corrosion-resistant, making them ideal for plumbing, irrigation, and other non-industrial applications. Additionally, plastic pipes are easier to install and handle due to their lighter weight and flexibility compared to steel pipes.

Q: 304 stainless steel tube with the diameter of 25*2-3 is what mean: The quality of the steel pipe should be in line with the national standard "stainless steel seamless pipe for fluid transportation" (GBT 14976-2012) requirements.

Q: How are steel pipes used in the manufacturing of oil refineries?: Steel pipes are used extensively in oil refineries for various purposes. They are primarily used for transporting crude oil, refined petroleum products, and various chemicals within the refineries. These pipes are also crucial for the distribution of water, steam, and other fluids required for the refining processes. Additionally, steel pipes are used in the construction of various equipment and structures in oil refineries, including storage tanks, heat exchangers, and process units. Overall, steel pipes play a vital role in ensuring the safe and efficient operation of oil refineries.

Q: What are the uses of welded steel pipes?: The spiral submerged arc welded pipe (SY5036-83) for the delivery of pressurized fluid is made of hot rolled steel strips for tube billets, often spirally formed, welded by double submerged arc welding and used for the transmission of pressurized fluid. The steel pipe has strong pressure bearing ability and good welding performance. After a rigorous scientific examination and test, it can be used safely. The utility model has the advantages of large caliber of the steel pipe, high transmission efficiency, and investment in laying pipelines. Mainly used in the transportation of petroleum and natural gas pipelines.

Q: What is the difference between internal lining and external coating of steel pipes?: The distinction between the internal lining and external coating of steel pipes can be found in their respective functions and locations. Internal lining serves as a safeguard for the inner surface of steel pipes, shielding it from corrosion, abrasion, and other forms of harm. It creates a barrier between the transported fluids or substances and the steel pipe, preventing direct contact and potential deterioration. The materials utilized for internal lining, such as epoxy, polyethylene, or cement mortar, are dependent on specific requirements and the nature of the substances being transported. The internal lining ensures the longevity and integrity of the steel pipe by reducing the risk of internal corrosion and contamination. On the other hand, external coating is applied to the outer surface of steel pipes. Its primary purpose is to provide protection against external factors such as weathering, soil corrosion, and mechanical damage. Acting as a shield, the external coating safeguards the steel pipe from environmental conditions like moisture, UV radiation, chemicals, and physical impact. Common materials used for external coatings include fusion-bonded epoxy, polyethylene, polypropylene, or bitumen. The selection of coating depends on factors such as exposure conditions, temperature, and the type of soil or surroundings the steel pipe will encounter. In summary, internal lining safeguards the inner surface of steel pipes from corrosion and damage caused by transported substances, while external coating acts as a barrier against external elements and physical stresses. Both internal lining and external coating play crucial roles in ensuring the durability and reliability of steel pipes in various applications, such as oil and gas pipelines, water supply systems, or industrial processes.

Q: What are the dimensions of steel pipes?: Steel pipes can have varying dimensions depending on specific requirements and industry standards. However, they generally adhere to standardized measurements for their outer diameter (OD), wall thickness, and length. The OD of steel pipes can range from small sizes, such as ¼ inch (6.35 mm) or ⅛ inch (3.175 mm), to larger sizes like 48 inches (1219.2 mm) or more for specialty applications. The wall thickness of steel pipes can also vary significantly, ranging from thin pipes with a few millimeters of thickness to thick pipes with several inches of thickness. Regarding length, standard steel pipes are typically produced in lengths of 20 feet (6.1 meters) or 40 feet (12.2 meters). However, custom lengths can also be manufactured to meet specific project requirements. It is important to note that these dimensions are only general examples and may not encompass all potential variations in steel pipe sizes. Therefore, consulting relevant industry standards and specifications is always recommended to determine the precise dimensions necessary for a specific application.

Q: Can steel pipes be used for underground drainage systems?: Yes, steel pipes can be used for underground drainage systems. Steel pipes are known for their durability, strength, and resistance to corrosion, making them suitable for underground applications. However, proper coating and maintenance are essential to ensure longevity and prevent rusting.

Q: Are steel pipes resistant to earthquakes?: Compared to other materials like concrete or PVC pipes, steel pipes are commonly regarded as more resistant to earthquakes. This is because steel possesses inherent properties such as high tensile strength and flexibility. These properties enable steel pipes to effectively absorb and distribute seismic energy during an earthquake, enabling them to endure shaking and ground movements more effectively. Moreover, steel pipes have the capability to deform without rupturing or collapsing, reducing the risk of structural failure. However, it is crucial to note that the earthquake resistance of steel pipes ultimately relies on various factors including the design, installation, and overall structural integrity of the piping system. To ensure the highest level of earthquake resistance for steel pipes, it is imperative to adhere to proper engineering and construction practices.

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