Our company, TOPSTAR, is a reliable supplier of carbon steel pipes. We offer a wide range of sizes and material grades, including seamless pipes and welded pipes. Whether you need high-quality seamless pipes or sturdy welded pipes, we've got you covered. Rest assured, our products meet the highest standards in terms of quality and durability. So, if you're in need of carbon steel pipes, look no further than TOPSTAR.
There are different types of welded pipes that are commonly used in various industries. One of these types is the high frequency resistance welded pipe (ERW welded pipe). It is made of steel plate and is welded in a round shape. Another type is the straight seam arc welding pipe (LSAW), which is also made of steel plate and welded in a round pipe. Additionally, there is the spiral welded pipe, which is another form of welded pipe. These welded pipes play a crucial role in various construction and industrial applications due to their strength and durability.
Pipelines are a versatile and important tool in the construction industry, as they can be used to create structures and transport various materials such as water, steam, gas, and air. These pipelines play a crucial role in producing the necessary resources for industries such as energy production, manufacturing, and transportation. Without pipelines, it would be much more difficult and expensive to transport these materials, which would negatively impact many aspects of our daily lives. Therefore, the use of pipelines is essential for the development and success of modern society.
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Size |
OD: 1/8"-36"(10.29mm-914.4mm) WT:SCH10-160,SCH STD, SCH XS, SCH XXS(1.25-50mm) Length:5.8m/6m/11.8m/12m |
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Application |
Liquid transmission refers to the process of transporting water and other fluids from one location to another. This can be achieved through various means such as pipelines, tanks, or containers. It plays a crucial role in many industries, including agriculture, energy, and manufacturing. Structure and offshore construction |
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Standard & Grade |
API 5L:GR A,GR B,X42,X46,X56,X60,X65,X70 ASTM A 106 GR A/B/C ASTM A 519:1010-1045,4130-4142,5135 EN10305:E235,E355 EN10210:S235JRH,S355JOH,S275J2H |
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Pipe End |
Beveled End;Plain End;Threaded End;Grooved End |
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Surface |
There are various ways to coat materials to prevent rust and damage. Some common options include using an anti-rust oil, applying a vanish, applying black paint, or using a coating such as PE/3PE/3LPP/Epoxy. No matter which method is used, the goal is to protect the material and extend its lifespan. By properly coating the materials, the likelihood of rust and corrosion is decreased, and the materials can withstand various environmental conditions. |
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Test |
There are several methods of testing materials to ensure their durability and safety. Non-destructive testing (NDT) techniques such as X-ray, ultrasonic testing (UT), and radiographic testing (RT) are commonly used to detect any defects or flaws in materials without causing any damage to them. Hydrostatic testing is another method that involves filling a vessel with water and raising the pressure to check for leaks. Finally, impact testing is used to examine how materials will perform under stress by subjecting them to a heavy impact. All of these methods are critical in ensuring the quality and safety of various materials used in industries such as construction, engineering, and manufacturing. Mechanical &Chemical test |
The use of mill equipment guarantees a consistent and superior quality of pipes.
2.High Strength and Toughness
3.Excellent corrosion resistance
4.Clean and fine grained steel
5.Low carbon and low Pcm material
6.Tigher tolerance at pipe end.
Europe: ERW Welded Pipe :
Standard and Material: EN10219 S235
Specificaiton:159*3*1000/2000/2250mm
Application:Structure Pipe
New Zealand: LSAW Steel Pipe;
Standard and Material: EN10219 S355J2H
Specificaiton:OD 610-762mm WT:16-25mm
Application:Structure Steel Pipe
Philippines: Galvanized ERW Steel Pipe;
Standard and Material: GB/T 3091 Q195
Specificaiton:88.9*3.3mm /48.3*2.5mm/48.3*1.6mm
Application:Inventory Using
The manufacturing process of electric-resistance welded (ERW) pipe involves several steps. The process begins with flat steel plates or strips that are shaped into a cylindrical form, forming a pipe. These plates or strips are first uncoiled and then passed through a series of rollers to obtain the desired shape.
Next, the edges of the plate or strip are heated using electrical resistance. This heating softens the material, making it easier to manipulate. The edges are then pressed together to form a welded joint.
After the welding process, the pipe is cooled and trimmed to the required length. It may undergo a straightening process to ensure it is straight and free from any bends or deformities.
To enhance the strength and durability of the pipe, it may undergo additional processing steps such as heat treatment or surface coating. Heat treatment involves subjecting the pipe to high temperatures to improve its mechanical properties, while surface coating helps protect it from corrosion or rust.
Finally, the finished pipes are inspected for quality and undergo various tests to ensure they meet the required standards. Some common tests include dimensional checks, visual inspection, and non-destructive testing methods like ultrasonic or radiographic examination.
By rearranging the above content, here is a similar version:
The manufacturing process of electric-resistance welded (ERW) pipe commences with the shaping of flat steel plates or strips into a cylindrical form to create the desired pipe. These plates or strips are uncoiled before being sent through rollers to achieve the desired shape.
The next step involves heating the edges of the plate or strip through electrical resistance, which softens the material and facilitates manipulation. Following this, the softened edges are pressed together to form a welded joint.
Once the welding process is complete, the pipe is cooled and trimmed to the necessary length. To ensure the pipe is straight and free from any deformities, a straightening process may be carried out.
To enhance the pipe's strength and durability, additional steps like heat treatment or surface coating may be applied. Heat treatment involves subjecting the pipe to high temperatures to improve its mechanical properties, while surface coating provides protection against corrosion or rust.
In the final stages, the finished pipes undergo quality inspections and various tests to ensure they meet the required standards. These tests include checks for dimensions, visual inspections, and non-destructive testing methods like ultrasonic or radiographic examination. (E.R.W.)
The process at the pipe mill begins with uncoiling the strip and then leveling and crop-shearing it. After that, both sides are simultaneously trimmed to the correct width before being fed into the forming and welding line. Throughout the process, the strip is carefully inspected for any surface defects. It undergoes a series of cold forming rolls to progressively shape it into a tubular form with abutting edges on top. The longitudinal edges are then joined using high frequency electric resistance welding. To ensure uniform wall thickness, any inside and outside flash from the weld is removed using special devices. The welded part is heat-treated electrically, followed by post annealing to guarantee adequate ductility at the weld and adjacent zone.
Next, the pipe passes through a set of cold sizing rolls to gradually reduce its diameter to the accurate size. This operation not only increases the pipe's strength but also improves its surface condition. A flying cut-off machine then cuts the pipe to the specified length. After the pipe is straightened, the ends are cropped and depending on the end finish requirements, they are either squared or beveled. To ensure its quality, the pipe undergoes hydrostatic testing at the specified pressure. Additionally, test specimens are taken at various stages of the process to verify the chemical and mechanical properties.
Each length of pipe is thoroughly inspected using ultrasonic testing on the weld, and checked for diameter, wall thickness, surfaces, end finish, camber, and concentricity. The length and weight of the pipe are measured and recorded, and a protective coating is applied to the outside surface to enhance its durability.
Q2.What testing equipment you have for carbon steel pipe?
X-ray flaw detection;acoustic flaw detection; impact testing machine; drop hammer testing machine; direct reading spectrometer;hydrostatic testing machine; tensile testing machine; complete metering system
Q3. What welded carbon steel pipe you provide?
1.American standard ERW high frequency welded pipe ASTM A106, A53, specifications: 1/2"-24", 21.3-609.6mm
2.British standard ERW high frequency welded pipe BS1387, specifications: 1/2"-12", 21.3-323.8mm
3.Welded steel pipe for automobile drive shaft GB9947-88 YB/T5209-2000
4.Welded steel for belt conveyor rollers
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