Various types of stainless steel pipe waiting for you

Various types of stainless steel pipe waiting for you

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 8000 m.t./month

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Product Description:

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: Classification, advantages and disadvantages of stainless steel welding: The arc is produced between the tungsten welding wire and the workpiece, so the protection gas is pure argon and the welding wire is not charged, so it can be sent by hand or by machine. Then it is whether to use direct current or alternating current, depending on the welding material.

Q: What is the difference between annealed and pickled stainless steel pipes?: Annealed stainless steel pipes and pickled stainless steel pipes both undergo different processes that affect their properties and appearance. Annealing is a heat treatment process that involves heating the stainless steel pipes to a specific temperature and then slowly cooling them. This process helps to relieve internal stresses and improve the ductility and toughness of the material. Annealed stainless steel pipes are usually softer and more malleable, making them easier to work with during fabrication and installation. They also tend to have a smoother, more polished surface finish. On the other hand, pickling is a chemical process that removes surface impurities such as oxides, scales, and rust from stainless steel pipes. It involves immersing the pipes in an acid solution, typically a mixture of nitric and hydrofluoric acid, which dissolves the impurities. Pickling helps to restore the corrosion resistance of the stainless steel and leaves a clean, bright, and uniform surface finish. In summary, the main difference between annealed and pickled stainless steel pipes lies in the processes they undergo. Annealing improves the material's ductility and toughness, while pickling removes surface impurities and restores corrosion resistance. The choice between annealed and pickled stainless steel pipes depends on the specific requirements of the application, such as the desired mechanical properties and surface finish.

Q: How do you calculate the expansion of stainless steel pipes?: In order to calculate the expansion of stainless steel pipes, it is necessary to take into account the coefficient of thermal expansion (CTE) of the material. The CTE quantifies the extent to which a material expands or contracts when exposed to temperature changes. To begin, the initial length of the stainless steel pipe must be determined. This refers to the length of the pipe at the starting temperature. Subsequently, the final operating temperature of the pipe needs to be established. This denotes the temperature at which the expansion is desired to be calculated. The CTE value for the specific grade of stainless steel used in the pipe must be obtained. The CTE is typically expressed in units of per degree Celsius (or per degree Fahrenheit). Multiply the initial length of the pipe by the CTE value and then multiply it by the change in temperature. This computation yields the expansion or contraction of the pipe within the given temperature range. For instance, assume a stainless steel pipe with an initial length of 10 meters, a CTE of 17 x 10^-6 per degree Celsius, and a desired expansion calculation at a final temperature of 100 degrees Celsius. The change in temperature is determined by subtracting the initial temperature from the final temperature. Expansion = Initial Length * CTE * Change in Temperature Expansion = 10 meters * 17 x 10^-6 per degree Celsius * 100 degrees Celsius Expansion = 0.0017 meters or 1.7 millimeters Consequently, when subjected to a temperature increase of 100 degrees Celsius, the stainless steel pipe would expand by 1.7 millimeters. It is important to note that this calculation assumes a uniform expansion throughout the entire length of the pipe. In reality, thermal expansion may vary due to factors such as pipe diameter, wall thickness, and other structural considerations. Thus, it is advisable to consult industry standards or engineering references for more precise calculations in specific applications.

Q: Advantages and disadvantages of PPR lined stainless steel pipe and PPR aluminium plastic pipe: PP-R aluminium plastic steady tubePP-R aluminium plastic steady tube is a composite pipe made of PP-R tube and aluminum layer. It is based on maintaining the original PP-R tube size unchanged, using hot melt adhesive technology on the outer surface and the thickness of 0.15-0.25mm aluminum strip under high temperature organic adhesive, then coated with 0.2mm around the PP-R (or PE) protective layer produced. It has five layers of polypropylene, aluminum, gum and polypropylene. Its intermediate aluminum layer acts as a strengthening agent to combine PP-R plastic with metal. It also has flexibility of plastic pipe and rigidity of metal tube. Through the integration of aluminum layer to achieve stable mechanical properties, with higher strength and better resistance to high temperature.Advantage：PP-R steady-state aluminum plastic pipe into the PP-R tube and the metal tube in one of the advantages, at the same time with PP-R tube health and sealing and metal pipe rigidity, forming a unique superior general plastic pipe has special properties, linear expansion coefficient, impervious to physical properties of oxygen, anti UV, high strength, high temperature resistance so excellent.

Q: What are the temperature limits for stainless steel pipes?: The temperature limits for stainless steel pipes depend on the specific grade of stainless steel being used. Generally, stainless steel pipes can withstand high temperatures, making them suitable for a wide range of applications. For austenitic stainless steel grades like 304 and 316, the temperature limits typically range from -250°C to 925°C (-418°F to 1,700°F). These grades exhibit excellent resistance to corrosion and can maintain their mechanical properties at elevated temperatures. Ferritic stainless steel grades, such as 430, have slightly lower temperature limits, typically ranging from -150°C to 815°C (-238°F to 1,499°F). While these grades offer good resistance to corrosion, they have lower thermal conductivity and may experience reduced strength at high temperatures compared to austenitic grades. It is important to note that the temperature limits can vary based on factors such as pipe thickness, surface condition, and the specific application. It is recommended to consult the manufacturer or relevant design codes to determine the precise temperature limits for a specific stainless steel grade and application.

Q: What are the different types of fittings used with stainless steel pipes?: Stainless steel pipes can be paired with various types of fittings, depending on the specific needs and application. Here are some of the most commonly used fittings: 1. Compression fittings: These fittings create a tight, leak-proof connection by compressing a ferrule onto the pipe. They work well with both rigid and flexible stainless steel pipes and are easy to install. 2. Threaded fittings: Known as screwed fittings, these have female threads that can be screwed onto the male threads of the pipe. They are commonly used in low-pressure situations and can be easily installed or removed. 3. Butt weld fittings: These fittings are used to make a permanent, welded connection between two stainless steel pipes. The pipes need to be beveled to create a V-shaped groove, and they are typically used in high-pressure or high-temperature settings. 4. Flange fittings: Flanges are utilized to connect two stainless steel pipes or connect a pipe to a valve, pump, or other equipment. They provide a strong and leak-proof connection and can be bolted or welded onto the pipe. 5. Push-to-connect fittings: These fittings offer a quick and tool-free connection. They use a push-in mechanism to secure the pipe and are commonly used in plumbing and air compression systems. 6. Camlock fittings: Camlock fittings enable rapid connection and disconnection of hoses and pipes. They have a lever or cam mechanism that locks the fitting into place, ensuring a secure connection. These fittings are often used in industrial settings where frequent connections and disconnections are necessary. Ultimately, the choice of fitting depends on factors such as the application, pressure requirements, and ease of installation. It is crucial to select the appropriate fitting to guarantee a reliable and long-lasting connection for stainless steel pipes.

Q: What is the density of stainless steel pipes?: The density of stainless steel pipes typically ranges from 7.9 to 8.0 grams per cubic centimeter.

Q: Comparison of ring type connection and argon arc welding of stainless steel pipe: 1. The pipe is embedded in the pipe, and the ring pressure connection strength is high;2. After the ring is pressed, the inserted part of the pipe and the pipe is a closed ring, which can not generate spiral loosening and strong vibration resistance;3. The sealing material fills the entire seal cavity tightly and the seal is very reliable;4. Easy to install and quick.5. Shrinkage and anti drawing test of ring seal joint

Q: What is the difference between nominal size and actual size in stainless steel pipes?: The nominal size of a stainless steel pipe refers to the designated size used for identification purposes, while the actual size represents the true dimensions of the pipe. Nominal size is typically indicated by a number, such as 1/2 inch or 2 inches, but the actual size may differ slightly due to manufacturing tolerances.

Q: What is the difference between seamless and extruded stainless steel pipes?: Seamless and extruded stainless steel pipes are utilized in various industries and applications, but they differ in several ways. 1. Manufacturing Process: The manufacturing process distinguishes seamless and extruded stainless steel pipes. Seamless pipes are formed through hot rolling or hot extrusion, where a heated cylindrical billet is pushed or pulled through a die to create a pipe without any seams. In contrast, extruded pipes are made using cold extrusion, forcing a solid stainless steel billet through a die to achieve the desired shape and size. 2. Seamless Nature: Seamless pipes, as their name suggests, lack any seams or welds along their length. This attribute enhances their strength and structural integrity. In contrast, extruded pipes may display visible seams or welds, potentially compromising the overall structure. 3. Sizes and Dimensions: Seamless pipes offer a wider range of sizes and dimensions compared to extruded pipes. This is due to the flexibility provided by the hot rolling process, which allows for greater shaping and forming capabilities. Extruded pipes, however, are limited in their size range and are typically used for smaller diameter applications. 4. Surface Finish: Seamless pipes generally boast a smooth and polished surface finish, making them suitable for applications where aesthetics are important, such as architectural structures or decorative elements. Conversely, the manufacturing process of extruded pipes can result in a rougher surface finish, making them more appropriate for industrial or structural applications where appearance is less critical. 5. Cost: In general, seamless pipes are more expensive than extruded pipes due to the complexity of the manufacturing process. The hot rolling method necessitates specialized equipment and a higher level of expertise, increasing production costs. On the other hand, extruded pipes are more cost-effective as they are produced through a simpler cold extrusion process. In conclusion, the differences between seamless and extruded stainless steel pipes encompass their manufacturing process, seamless nature, size range, surface finish, and cost. The choice between the two will depend on the specific requirements of the application at hand.

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