SPIRAL STEEL PIPE 32’‘

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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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	<0.045	<0.030	>195	315-430	32-33
Q215	0.09-0.15	0.25-0.55	<0.05	<0.045	<0.030	>215	335-450	26-31
Q235	0.12-0.20	0.30-0.70	<0.045	<0.045	<0.030	>235	375-500	24-26
Q345	<0.20	1.0-1.6	<0.040	<0.040	<0.55	>345	470-630	21-22

Q: How are steel pipes protected against external impact or mechanical damage?: Various methods are employed to protect steel pipes from external impact or mechanical damage. One commonly utilized technique involves applying a protective coating onto the pipe's surface. This coating acts as a barrier, preventing direct contact between the pipe and external objects or forces. Coatings such as epoxy, polyethylene, or polyurethane are frequently chosen due to their excellent resistance to impact and abrasion. Another method of protection involves the use of pipe supports or clamps. These supports are positioned at regular intervals along the pipe's length, ensuring stability and minimizing excessive movement or vibration. They help distribute the load and absorb any external impacts, thus reducing the risk of mechanical damage. Additionally, steel pipes can be reinforced by wrapping them with materials like fiberglass, carbon fiber, or kevlar. These reinforcement materials provide an extra layer of strength and durability, enhancing the pipes' resistance to external impact and mechanical damage. Furthermore, burying the pipes underground or installing them within protective casings can offer an additional layer of protection. This measure shields the pipes from direct contact with external objects, reducing the potential for damage caused by accidental impacts or environmental factors. In conclusion, a combination of protective coatings, supports, reinforcements, and appropriate installation methods ensures that steel pipes are safeguarded against external impact or mechanical damage. This effectively extends their lifespan and maintains their structural integrity.

Q: How do you calculate the flow rate in a steel pipe?: To calculate the flow rate in a steel pipe, several parameters need to be considered. The first and most important parameter is the cross-sectional area of the pipe, which can be calculated using the formula A = πr², where A is the cross-sectional area and r is the radius of the pipe. Next, the velocity of the fluid flowing through the pipe needs to be determined. This can be done using the equation v = Q/A, where v is the velocity, Q is the volumetric flow rate, and A is the cross-sectional area of the pipe. To calculate the volumetric flow rate, the equation Q = AV can be used, where Q is the volumetric flow rate, A is the cross-sectional area, and V is the average velocity of the fluid. Additionally, it is important to take into account the properties of the fluid being transported through the pipe. The density and viscosity of the fluid can affect the flow rate. Overall, the flow rate in a steel pipe can be calculated by determining the cross-sectional area of the pipe, calculating the velocity of the fluid, and considering the properties of the fluid being transported.

Q: What are the different types of steel pipe supports for thermal expansion?: There are several different types of steel pipe supports that can be used for thermal expansion, including rigid supports, sliding supports, and spring supports. Rigid supports provide fixed support to the pipe and do not allow for any movement. Sliding supports allow the pipe to move horizontally as it expands or contracts, while still providing vertical support. Spring supports use springs to support the weight of the pipe and allow for vertical movement as well as thermal expansion.

Q: Are steel pipes suitable for use in chemical plants?: Yes, steel pipes are suitable for use in chemical plants. Steel pipes offer excellent resistance to corrosion, high durability, and can withstand high temperatures and pressures commonly found in chemical processing. Additionally, steel pipes can be easily welded, making them versatile for various chemical applications.

Q: Can steel pipes be used for oil wells?: Yes, steel pipes can be used for oil wells. Steel pipes are commonly used in the oil and gas industry due to their strength, durability, and resistance to corrosion. They are able to withstand the high pressures and temperatures that are encountered in oil well drilling and production. Steel pipes are also able to transport oil efficiently and safely from the well to the surface, making them a preferred choice for oil well infrastructure. Additionally, steel pipes can be easily welded and threaded, allowing for easy installation and maintenance in oil well applications.

Q: Can steel pipes be used for conveying potable water?: Yes, steel pipes can be used for conveying potable water. However, there are some considerations and precautions that need to be taken into account. Steel pipes are strong and durable, making them suitable for transporting water over long distances. They are also resistant to corrosion and can withstand high pressure. To ensure the safety and quality of the water being transported, it is important to use pipes that are specifically designed and manufactured for potable water applications. These pipes are often coated or lined with materials that prevent the leaching of contaminants into the water, such as epoxy or cement mortar lining. Additionally, regular maintenance and inspections should be conducted to prevent the buildup of sediments or rust that could affect the water quality. It is worth noting that steel pipes can be more expensive compared to other materials like plastic or copper. However, their longevity and reliability make them a cost-effective choice in the long run. It is also important to comply with local regulations and standards regarding the use of steel pipes for conveying potable water to ensure the health and safety of consumers.

Q: How are steel pipes used in the construction of nuclear power plants?: Steel pipes are used in the construction of nuclear power plants for various purposes, including transporting coolant, steam, and gases, as well as providing structural support for the overall system. These pipes are specifically designed to withstand high pressures, extreme temperatures, and corrosive environments, ensuring the safe and efficient operation of the nuclear power plant.

Q: Can steel pipes be used for firefighting systems?: Indeed, firefighting systems can utilize steel pipes. Steel pipes are frequently chosen for their robustness and ability to endure high temperatures, making them ideal for transporting water and other fire-suppressing agents. Typically, these pipes are employed in larger commercial or industrial structures that necessitate a larger flow rate and pressure for their fire protection systems. Additionally, steel pipes possess the benefit of withstanding external forces and impacts, thus ensuring the integrity of the firefighting system. Moreover, steel pipes offer the convenience of easy connection, simplifying installation and maintenance procedures. Nonetheless, it is crucial to ensure that the steel pipes employed in firefighting systems undergo appropriate treatment to prevent corrosion and rusting, as these factors may compromise their effectiveness during emergency situations. Regular inspections and maintenance are necessary to guarantee the reliability and functionality of the steel pipes within the firefighting system.

Q: How do steel pipes handle high-velocity flow?: Steel pipes are designed to handle high-velocity flow efficiently due to their inherent strength and durability. The smooth interior surface of steel pipes minimizes friction, allowing for smooth flow and reducing energy loss. Additionally, the sturdy construction of steel pipes enables them to withstand the pressures and forces exerted by high-velocity flow without deformation or failure.

Q: What are the standard dimensions and weight of steel pipes?: The standard dimensions and weight of steel pipes can vary depending on the specific type and grade of steel pipe being used. However, common standard dimensions for steel pipes include sizes ranging from 1/8 inch to 48 inches in diameter, with wall thicknesses ranging from Schedule 5 to Schedule 160. As for weight, it also depends on the diameter and wall thickness, but a general guideline is that a 1-inch diameter steel pipe with a 1/4 inch wall thickness weighs approximately 1.02 pounds per foot. It is important to note that these dimensions and weights can vary based on the specific standards and requirements set by different industries and applications.

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