SPIRAL STEEL PIPE 46‘‘ ASTM API LARGE DIAMETER PIPE

SPIRAL STEEL PIPE 46‘‘ ASTM API LARGE DIAMETER PIPE

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 5 m.t.

Supply Capability:: 3000 m.t./month

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Packaging & Delivery

Packaging Detail:	standard export packing or as customer's requirement
Delivery Detail:	within 10 - 30 days

Specifications

Spiral Welded Steel Pipes and Tubes
1.Material:Q195-Q235
2.Length:1-12m
3.WT:1.0-14mm
4.O.D.:20-273mm

Spiral Welded Steel Pipes and Tubes

Product Description:

1.Material : Q235,Q345,L245,L290,L360,L415,L450,L485,GrB,X42,46,X52,X56,X60,X65,X70,X80,X100

2,Standard: SY/T5037-2000,GB/T9711-2011,API Spec 5L PSL1/PSL2,ASTM A252\A53,ISO3183,DIN17172,EN10217,JIS G3457,AWWA C200,ASTM A139,ASTM A671,ASTM A672

3.Wall thickness: 3.0mm-30mm

4.Outer diameter: φ168mm-3020mm

5,Length: 5m-12m or as your requirement

6,Corrosion protection standard: DIN30670,DIN30671, AWWAC210, AWWA C203, SY/T0413-2002,SY/T0414-2002

7,Application: Oil, gas, natural gas, water pipe, thermal electricity pipe, steel structure engineering, etc

Q195-q345 Material Steel Pipe's Materials

Elements Material	Chemical Compsition%					Mechanical Property
	C%	Mn%	S%	P%	Si%	Yield Point (Mpa)	Tensile Strength(Mpa)	Elongation (%)
Q195	0.06-0.12	0.25-0.50	<0.050< span="">	<0.045< span="">	<0.030< span="">	>195	315-430	32-33
Q215	0.09-0.15	0.25-0.55	<0.05< span="">	<0.045< span="">	<0.030< span="">	>215	335-450	26-31
Q235	0.12-0.20	0.30-0.70	<0.045< span="">	<0.045< span="">	<0.030< span="">	>235	375-500	24-26
Q345	<0.20< span="">	1.0-1.6	<0.040< span="">	<0.040< span="">	<0.55< span="">	>345	470-630	21-22

Q:What steel pipes are buried for outdoor heating pipes? Seamless or welded tube? Are there any rules for specific countries? Can use the seamed tube?: The pipe material of heating pipe network should be designed according to the requirement. When the design is not specified, the following requirements shall be met:1 when the pipe diameter is less than or equal to 40mm, welded steel pipe shall be used.2 when the pipe diameter is 50 ~ 200mm, welded steel pipe or seamless steel pipe shall be used.3 when the pipe diameter is greater than 200mm, spiral welded steel pipe shall be used.

Q:How do steel pipes handle ground settlement?: Steel pipes are generally robust and durable, making them well-suited for handling ground settlement. The flexibility and strength of steel allow the pipes to withstand the shifting and settling of the ground without significant damage. Steel pipes have a high resistance to deformation, which means they can maintain their shape and structural integrity even when the ground settles or moves. When the ground settles, steel pipes can accommodate the movement by flexing and bending slightly. This flexibility allows them to adjust to changes in the ground without breaking or cracking. Additionally, steel pipes are often designed with joints that can absorb and distribute stress caused by ground settlement. Furthermore, steel pipes have a smooth interior surface that minimizes friction and resistance to the flow of materials. This feature is particularly important when the ground settles because it reduces the likelihood of clogs or blockages due to debris or sediment settling in the pipes. In summary, steel pipes are well-equipped to handle ground settlement due to their strength, flexibility, and resistance to deformation. They can adapt to the movement of the ground without compromising their structural integrity, making them a reliable choice for various applications, including underground infrastructure and pipeline systems.

Q:What is the average lifespan of steel pipes in different applications?: The average lifespan of steel pipes in different applications can vary depending on various factors such as the quality of the steel, the environment in which the pipes are used, and the maintenance and care they receive. In general, steel pipes used for water supply lines can have an average lifespan of around 50 to 70 years. This is because these pipes are typically made of high-quality steel and are subject to less corrosive environments. However, factors such as water chemistry, soil conditions, and the presence of corrosive substances can significantly influence the lifespan of these pipes. For steel pipes used in industrial applications such as oil and gas pipelines, the average lifespan can range from 20 to 50 years. These pipes are exposed to more aggressive environments, including high temperatures, pressure, and corrosive substances. Regular inspection, maintenance, and corrosion protection measures can help extend their lifespan. In construction applications, steel pipes used for structural purposes can have an average lifespan of 50 to 100 years or more. These pipes are typically designed to withstand heavy loads and are often protected by coatings or insulation to prevent corrosion. It's important to note that these are average lifespans and individual pipes may have shorter or longer lifespans depending on the specific conditions they are exposed to. Regular inspections, maintenance, and timely repairs or replacements when necessary can help ensure the longevity of steel pipes in different applications.

Q:What are the properties of steel that make it suitable for pipe manufacturing?: Steel is a highly preferred material for pipe manufacturing due to its unique properties. Firstly, steel exhibits exceptional strength and durability, making it capable of withstanding high pressure and extreme temperatures. This strength ensures that steel pipes can safely transport fluids and gases over long distances without the risk of leakage or breakage. Another important property of steel is its resistance to corrosion. Steel pipes are often exposed to various corrosive substances such as water, chemicals, and gases, which can degrade other materials over time. However, steel is highly resistant to corrosion, resulting in long-lasting and reliable pipes. Additionally, steel is a highly versatile material, allowing for various pipe sizes and shapes to be manufactured. Steel pipes can be customized to meet specific project requirements, making them suitable for a wide range of applications such as water supply, oil and gas transmission, sewage systems, and structural support. Moreover, steel is known for its excellent thermal conductivity, which is crucial for applications involving the transportation of hot or cold fluids. Steel pipes efficiently transfer heat, ensuring minimal energy loss during the process. Furthermore, steel is a recyclable material, making it an environmentally friendly option for pipe manufacturing. Steel pipes can be recycled and reused, reducing the need for new raw materials and minimizing waste generation. In conclusion, the properties of strength, durability, corrosion resistance, versatility, thermal conductivity, and recyclability make steel an ideal choice for pipe manufacturing. These properties ensure the reliability, efficiency, and longevity of steel pipes in various industries and applications.

Q:SC15 what does galvanized steel pipe look like?: Ordinary galvanized steel pipe, the outer diameter is 1.5 inches

Q:What are the advantages of using steel pipes in industrial plants?: Using steel pipes in industrial plants offers numerous advantages. Firstly, their exceptional strength and durability make them ideal for transporting materials and fluids under high temperatures, pressures, and heavy loads. Secondly, steel pipes have excellent resistance to corrosion, which is crucial in industrial settings where they encounter corrosive substances or harsh environmental conditions. This resistance ensures their longevity, prevents leaks, and eliminates potential hazards. Additionally, steel pipes are highly versatile. They can be easily fabricated and customized to meet specific requirements, including different sizes and shapes. This flexibility simplifies installation and maintenance, reducing downtime and improving overall efficiency. Moreover, steel pipes have a smooth interior surface, allowing for efficient material flow with minimal resistance and pressure drop. Their smoothness also prevents the accumulation of deposits and contaminants, ensuring a clean and hygienic environment. Furthermore, steel pipes exhibit high resistance to fire, providing an added layer of safety in industrial plants where fires can have disastrous consequences. Lastly, while the initial installation cost of steel pipes may be higher compared to other materials like plastic or copper, their durability and low maintenance requirements result in significant long-term cost savings. With a long lifespan and resistance to corrosion and damage, the need for frequent replacements or repairs is minimized. In conclusion, the use of steel pipes in industrial plants offers various advantages, including strength, durability, corrosion resistance, versatility, efficient flow, fire resistance, and cost-effectiveness. These qualities make steel pipes a reliable and efficient choice for diverse applications within industrial facilities.

Q:How are steel pipes used in the construction of desalination plants?: Steel pipes are commonly used in the construction of desalination plants for various purposes. They are used to transport water from the intake point to the plant, as well as to distribute the treated water to the storage tanks or other destinations. Steel pipes are also employed in the plant's infrastructure, such as for the installation of pumps, valves, and other equipment. Additionally, steel pipes are utilized for the discharge of brine, which is the concentrated salt solution generated during the desalination process. Overall, steel pipes play a crucial role in ensuring the efficient and reliable operation of desalination plants.

Q:How do you calculate the flow rate through a steel pipe?: To calculate the flow rate through a steel pipe, you need to consider several factors. The most important ones are the diameter of the pipe, the pressure difference across the pipe, and the properties of the fluid flowing through it. Firstly, measure the inside diameter of the steel pipe accurately. This measurement is essential as it determines the cross-sectional area through which the fluid flows. The units for the diameter should be consistent with the units used for other measurements. Next, determine the pressure difference across the pipe. This can be done by measuring the pressure at two points along the pipe, typically at the inlet and outlet. The pressure measurements should be taken at the same height to avoid any discrepancies. The pressure difference is usually given in units of pressure (such as psi, kPa, or bar). Once you have the diameter and pressure difference, you can use the Bernoulli equation or the Darcy-Weisbach equation to calculate the flow rate. The Bernoulli equation relates the pressure difference to the velocity of the fluid. However, this equation assumes ideal conditions, neglecting factors such as friction losses, viscosity, and turbulence. The Darcy-Weisbach equation is more accurate and considers these factors. To use the Darcy-Weisbach equation, you need to know the properties of the fluid flowing through the pipe, such as its density and viscosity. These properties can be determined either through experimentation or by referring to literature values. Once you have all the necessary information, you can use the Darcy-Weisbach equation: Q = (π/4) * D^2 * √[(2 * ΔP) / (ρ * f * L)] Where: Q is the flow rate (in cubic meters per second or any other consistent units) D is the diameter of the pipe (in meters or any other consistent units) ΔP is the pressure difference across the pipe (in Pascals or any other consistent units) ρ is the density of the fluid flowing through the pipe (in kilograms per cubic meter or any other consistent units) f is the friction factor, which depends on the Reynolds number and the roughness of the pipe. L is the length of the pipe (in meters or any other consistent units) By plugging in the values for all the variables, you can calculate the flow rate through the steel pipe accurately.

Q:What is the role of steel pipes in the transportation of petroleum products?: Steel pipes play a crucial role in the transportation of petroleum products as they provide a safe and efficient means of transferring oil and gas over long distances. These pipes are strong, durable, and resistant to corrosion, ensuring the integrity of the pipelines and preventing leakage or contamination of the products. Additionally, steel pipes have high heat resistance, making them suitable for transporting hot petroleum products. Overall, steel pipes serve as the backbone of the petroleum transportation infrastructure, facilitating the smooth and reliable delivery of these essential energy resources.

Q:Hot galvanized steel pipe for use?: Hot galvanized pipe: in order to improve the corrosion resistance of steel pipe, galvanized steel pipe. Galvanized steel pipe hot galvanized and galvanized two kinds, hot galvanized, zinc coating thickness, zinc plating cost is low, the surface is not very smooth.The hot-dip galvanized pipe is an alloy layer that causes molten metal to react with the iron matrix, thus combining the substrate with the two coating. Hot dip galvanizing is the first steel pickling, in order to remove iron, steel pipe surface after pickling, cleaning by ammonium chloride or zinc chloride solution or ammonium chloride and zinc chloride aqueous solution tank, and then into the hot dip tank. Hot galvanizing has the advantages of uniform coating, strong adhesion, long service life and so on. A complex physical and chemical reaction is formed between the steel tube matrix and the molten plating solution to form a corrosion resistant structure with a tight zinc - iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.

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