SPIRAL STEEL PIPE 46’‘48‘‘50’‘ 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: How are steel pipes protected against rusting?: Steel pipes are protected against rusting through a process called corrosion protection. There are several methods employed to prevent rust formation on steel pipes, including: 1. Coatings: One common method is applying various coatings to the surface of the steel pipes. These coatings act as a barrier, preventing oxygen and moisture from reaching the metal surface and initiating the rusting process. Coating options include epoxy, polyethylene, zinc, or even a combination of these materials. 2. Galvanization: Galvanizing steel pipes involves immersing them in a bath of molten zinc. This process creates a protective layer of zinc on the surface of the pipes which acts as a sacrificial barrier. If any small areas of the pipe surface are exposed, the zinc coating will corrode instead of the steel, providing ongoing protection against rust. 3. Cathodic Protection: This method utilizes an electrical current to protect the steel pipes. By connecting the pipes to a sacrificial anode, usually made of zinc or magnesium, the anode will corrode instead of the steel pipes when exposed to moisture and oxygen. This process is commonly used in underground or underwater applications. 4. VCI (Vapor Corrosion Inhibitor) Technology: VCI technology involves the use of chemical compounds that release a vapor that protects the steel pipes from rusting. These compounds form a thin layer on the surface of the pipes, inhibiting the corrosion process by neutralizing oxygen and moisture. 5. Regular Maintenance: In addition to the above methods, regular inspection and maintenance are crucial to prevent rust formation on steel pipes. This includes cleaning the pipes, removing any accumulated debris or corrosive substances, and repairing any damaged coatings or protective layers. Overall, these methods of corrosion protection effectively safeguard steel pipes from rusting, ensuring their longevity and durability in various industrial, commercial, and residential applications.

Q: How are steel pipes used in the construction of telecommunications towers?: Steel pipes are used in the construction of telecommunications towers as they provide structural support and stability. They are used as the main framework for the tower, forming the vertical columns, horizontal bracing, and diagonal supports. These pipes are capable of withstanding heavy loads, high winds, and other environmental factors, ensuring the tower's durability and longevity. Additionally, steel pipes allow for easy installation and maintenance of antennas, cables, and other telecommunications equipment.

Q: How are steel pipes tested for mechanical strength?: Steel pipes are typically tested for mechanical strength through various destructive and non-destructive testing methods. Destructive tests involve subjecting the pipes to tension, compression, or bending forces until failure occurs, allowing the measurement of their ultimate tensile strength, yield strength, and elongation. Non-destructive tests, such as ultrasonic testing, magnetic particle inspection, or radiographic examination, are also conducted to detect any internal or surface defects that may affect the mechanical strength of the pipes. These tests ensure that steel pipes meet the required standards and specifications in terms of their mechanical strength.

Q: What are the different methods of coating steel pipes for insulation?: There are several methods of coating steel pipes for insulation, each with its own advantages and disadvantages. 1. Thermal Insulation Coating: This method involves applying a layer of thermal insulation material, such as mineral wool or foam, onto the steel pipe. The insulation material helps to reduce heat transfer and minimize energy loss. Thermal insulation coatings are relatively easy to apply and can provide excellent insulation properties. However, they may be prone to degradation over time and may require regular maintenance and replacement. 2. Corrosion Protection Coating: Steel pipes are often coated with corrosion protection materials, such as epoxy or polyethylene, to prevent rust and corrosion. These coatings act as a barrier between the steel surface and the surrounding environment, protecting the pipe from moisture, chemicals, and other corrosive elements. Corrosion protection coatings are typically durable and long-lasting, providing effective protection for the steel pipe. However, they may not provide significant thermal insulation properties. 3. Fusion-Bonded Epoxy (FBE) Coating: FBE coating is a popular method for both insulation and corrosion protection. It involves applying a layer of epoxy powder to the steel pipe and then heating it to create a strong, durable bond. FBE coatings provide excellent adhesion and resistance to corrosion, as well as some thermal insulation properties. They are commonly used in oil and gas pipelines and can withstand high temperatures and harsh environments. 4. Polyurethane Foam Coating: Polyurethane foam is often used as an insulation coating for steel pipes. It is applied by spraying or injecting the foam onto the pipe surface, which then expands and hardens to create a protective layer. Polyurethane foam coatings provide excellent thermal insulation properties and can be applied to pipes of various sizes and shapes. However, they may require special equipment and expertise for application and may be susceptible to physical damage or moisture absorption if not properly sealed. 5. Ceramic Coating: Ceramic coatings are another option for insulating steel pipes. These coatings are typically applied using a thermal spray process, which creates a layer of ceramic material on the pipe surface. Ceramic coatings can provide high-temperature insulation, corrosion resistance, and thermal shock protection. They are commonly used in industries such as power generation and aerospace, where extreme temperature conditions are present. However, ceramic coatings can be expensive and may require specialized equipment and expertise for application.

Q: What is the single length of galvanized steel pipe?: Hot dip galvanized steel pipe is widely used in fire, power and highway.

Q: How are steel pipes used in industrial manufacturing processes?: Steel pipes are commonly used in industrial manufacturing processes for various purposes such as transporting fluids, gases, and solids, providing structural support, and facilitating heat transfer. They are used in industries like oil and gas, construction, automotive, and manufacturing, where they are utilized for plumbing systems, conveyance of materials, and as a durable and reliable medium for handling high-pressure and high-temperature applications.

Q: How are steel pipes protected against fire hazards?: Steel pipes are protected against fire hazards through various methods, including the application of fire-resistant coatings, encasement in fire-rated materials, and the installation of fire sprinkler systems. Additionally, fire stops and fire barriers are used to prevent the spread of fire and smoke through pipe penetrations in walls and floors.

Q: How is the steel pipe dance installed at home?: Portable pipe with instructions and CD can be installed, portable steel pipe of a new patent, convenient installation, no restriction site, no drilling, readily removable, adjustable height, stainless steel, solid.

Q: What are the different types of steel pipe tees?: There are several different types of steel pipe tees that are commonly used in various plumbing and piping applications. 1. Equal tee: This type of tee has all three branches of the same size, resulting in equal flow of fluid or gas through each branch. 2. Unequal tee: As the name suggests, an unequal tee has branches of different sizes. This allows for the merging or diversion of flows with different volumes or pressures. 3. Reducing tee: This type of tee is used when the branch size is smaller than the main pipe size. It allows for a reduction in size while maintaining the flow in the main line. 4. Barred tee: A barred tee is used in situations where a pig (a device used for cleaning and inspecting pipelines) needs to be inserted or removed from the line. It has a bar welded across one or two of the branches to create a bypass for the pig. 5. Lateral tee: A lateral tee has a 45-degree or 90-degree branch angle, allowing for the branch line to run perpendicular to the main line. It is commonly used in fire sprinkler systems or in situations where a change in direction is required. 6. Compression tee: This type of tee is used in gas or hydraulic systems, where the branches are connected using compression fittings instead of welding or threading. 7. Butt-weld tee: A butt-weld tee is used in high-pressure and high-temperature applications. It is welded to the main pipe using butt-welding techniques, ensuring a strong and leak-proof connection. These are some of the most common types of steel pipe tees used in various industries. The selection of the appropriate tee depends on the specific requirements of the project, including the size of the pipes, the flow rates, and the materials being transported.

Q: Can steel pipes be used in high-pressure applications?: Yes, steel pipes can be used in high-pressure applications. Steel pipes are known for their strength and durability, making them suitable for handling high pressures in various industries such as oil and gas, water distribution, and chemical processing.

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