Stainless Steel Welded Pipe ASTM A358/A312

Stainless Steel Welded Pipe ASTM A358/A312

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Payment Terms:: TT or LC

Min Order Qty:: 25 m.t.

Supply Capability:: 40 m.t./month

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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 do you inspect steel pipes for defects?: There are several methods to inspect steel pipes for defects. One common approach is visual inspection, where trained professionals examine the surface of the pipes for visible defects such as cracks, corrosion, or deformities. Another method is ultrasonic testing, which involves using high-frequency sound waves to detect internal defects like wall thickness variations or cracks. Magnetic particle inspection is also commonly used, where the pipes are magnetized, and magnetic particles are applied to reveal surface defects. X-ray and radiographic inspections can be employed to detect internal defects as well. Ultimately, a combination of these methods is often utilized to ensure thorough inspection and identification of any defects in steel pipes.

Q: What are the safety precautions to follow while working with steel pipes?: When working with steel pipes, it is important to follow certain safety precautions to ensure a safe working environment. Here are some key safety measures to consider: 1. Personal Protective Equipment (PPE): Always wear appropriate PPE, including safety goggles, gloves, steel-toed boots, and a hard hat. This will protect you from potential hazards such as falling objects, sharp edges, or flying particles. 2. Use proper lifting techniques: Steel pipes can be heavy and awkward to handle. Use proper lifting techniques, such as bending your knees and using your legs to lift, to avoid straining your back or causing musculoskeletal injuries. 3. Secure the work area: Clear the work area of any clutter or obstacles that could pose a tripping hazard. Ensure that the pipes are properly stored and secured to prevent them from rolling or falling. 4. Be cautious of sharp edges: Steel pipes often have sharp edges, which can cause cuts or punctures. Handle them with care and consider using protective covers or gloves to avoid injuries. 5. Use appropriate tools: Utilize the correct tools and equipment for cutting, welding, or manipulating steel pipes. Follow manufacturer instructions and guidelines to ensure safe usage. 6. Avoid working in confined spaces: Working in confined spaces poses serious risks. If it is necessary to work in such an area, ensure proper ventilation and follow confined space entry protocols to prevent asphyxiation or other hazards. 7. Follow proper welding procedures: If welding is involved, follow proper welding procedures and ensure proper ventilation in the workspace. Use fire-resistant blankets or screens to protect nearby combustible materials. 8. Be aware of hot surfaces: Steel pipes can become hot during welding or other processes. Use appropriate insulation or heat-resistant gloves to protect yourself from burns or heat-related injuries. 9. Establish communication: Establish clear communication channels with colleagues when working with steel pipes, especially when lifting or moving heavy objects. Use hand signals or verbal communication to ensure everyone is on the same page and to prevent accidents. 10. Regularly inspect tools and equipment: Before starting any task, inspect tools, equipment, and scaffolding for any damage or defects. Report and replace any faulty equipment to prevent accidents. Remember, safety is paramount when working with steel pipes. By following these precautions and using common sense, you can ensure a safe working environment for yourself and your colleagues.

Q: How do steel pipes perform in extreme temperature variations?: Steel pipes perform well in extreme temperature variations due to their high thermal conductivity and low thermal expansion coefficient. This allows them to efficiently transfer heat and withstand the expansion and contraction caused by temperature fluctuations without compromising their structural integrity.

Q: How are steel pipes used in the defense sector?: Steel pipes are used in the defense sector for various purposes such as constructing military infrastructure, including bunkers, underground facilities, and missile silos. They are also utilized in the manufacturing of military vehicles, weapons systems, and equipment. Steel pipes provide strength, durability, and resistance to extreme conditions, making them ideal for applications in the defense sector.

Q: How do you determine the maximum allowable stress for steel pipes?: In order to establish the maximum allowable stress for steel pipes, several factors must be taken into account. These factors encompass the type of steel, the dimensions of the pipe, and the operating conditions it will be exposed to. To begin with, the type of steel chosen is a pivotal aspect in determining the maximum allowable stress. Different steel grades possess distinct mechanical properties, including yield strength, tensile strength, and elongation. These properties define the steel's capacity to withstand stress before deforming or failing. Hence, it is crucial to comprehend the specific grade of steel employed in the pipes to ascertain the maximum allowable stress. Additionally, the dimensions of the pipe are of utmost importance. The external diameter, wall thickness, and length all impact the pipe's strength and ability to handle stress. By calculating the cross-sectional area and moment of inertia, engineers can evaluate the pipe's resistance to bending and axial stresses. These calculations, combined with the material properties, facilitate the determination of the maximum allowable stress. Finally, the operating conditions under which the pipe will be utilized play a critical role. Variables such as temperature, pressure, and the presence of corrosive substances can significantly influence the maximum allowable stress of a steel pipe. Elevated temperatures can alter the mechanical properties of the steel, while high pressures can induce additional stress. Furthermore, the presence of corrosive substances can lead to material degradation and diminish the pipe's strength. Thus, considering these operational factors is essential when determining the maximum allowable stress. To summarize, the process of establishing the maximum allowable stress for steel pipes entails assessing the specific steel grade, the pipe's dimensions, and the operating conditions. By analyzing these factors, engineers can ensure that the steel pipe is designed and utilized within its safe stress limits.

Q: What does cathodic protection of steel tubes mean?: The corrosion of metals causes great economic losses directly or indirectly. Foreign statistics show that every year due to corrosion and scrap metal materials, equivalent to 20~40% of metal production, the world every year due to corrosion and loss of metal reached more than 1 tons.

Q: What's the difference between hot-rolled seamless steel tube and cold-rolled seamless steel tube?: The difference between hot rolled seamless steel tube and cold rolled seamless steel tube:1) cold-rolled seamless tubes tend to be of small diameter, and hot-rolled seamless tubes are often of large diameter.2) the accuracy of cold-rolled seamless steel tube is higher than that of hot-rolled seamless steel tube, and the price is higher than that of hot-rolled seamless steel tube.

Q: What are the main components of a steel pipe?: The main components of a steel pipe include the steel material itself, which is typically made from carbon and alloy steel, as well as various coatings or linings that can be applied to enhance its durability and resistance to corrosion. Additionally, a steel pipe may also have fittings such as flanges or couplings, and may be further reinforced with supports or braces depending on its intended use.

Q: How are steel pipes used in the construction of underground utilities?: Steel pipes are commonly used in the construction of underground utilities due to their strength, durability, and resistance to corrosion. These pipes are typically used for water and gas distribution systems, as well as for sewer and drainage systems. The steel pipes are laid underground, serving as reliable conduits for the transportation of essential utilities to homes, businesses, and other structures.

Q: How are steel pipes protected against corrosion in marine environments?: Steel pipes are protected against corrosion in marine environments through various methods, such as applying protective coatings, using sacrificial anodes, employing cathodic protection, and implementing corrosion inhibitors.

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