SPIRAL STEEL PIPE 56’‘ 60’‘ 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:Can steel pipes be used for hydropower generation?: Yes, steel pipes can be used for hydropower generation. Steel pipes are often used in the construction of hydroelectric power plants to transport water from a higher elevation to lower areas, where the water's kinetic energy is converted into mechanical energy to generate electricity. The durability and strength of steel pipes make them suitable for this purpose, as they can withstand the high pressure and flow rates of water in hydropower systems.

Q:How are steel pipes measured and categorized?: Typically, steel pipes are measured and categorized by their outer diameter, wall thickness, and length. The outer diameter represents the width of the pipe when viewed from the side, while the wall thickness refers to how thick the pipe's walls are. These measurements are usually given in millimeters or inches. Categorizing steel pipes is done based on their purpose and specifications. The most common way to categorize them is by their pressure rating, which determines their ability to handle different levels of internal or external pressure. Pipes are divided into different pressure classes, like Schedule 40, Schedule 80, and Schedule 160, to name a few. The higher the pressure class, the thicker and stronger the pipe is. Steel pipes can also be categorized according to their manufacturing process and material composition. For instance, seamless steel pipes are created by piercing a solid steel bar to create a hollow tube, while welded steel pipes are made by rolling and welding a flat steel sheet or strip into a cylindrical shape. Additionally, steel pipes can be classified based on their material composition, such as carbon steel pipes, stainless steel pipes, or alloy steel pipes. Another way to categorize steel pipes is by their end connections or fittings. Common types of pipe ends include threaded ends, which are suitable for attaching fittings by screwing them onto the pipe, and plain ends, which are typically used for welding or flanging connections. In conclusion, the measurement and categorization of steel pipes are crucial for ensuring the proper selection and usage of these pipes in various industries, including construction, oil and gas, plumbing, and manufacturing.

Q:Can steel pipes be used for scaffolding?: Yes, steel pipes can be used for scaffolding. Steel pipes are commonly used in scaffolding due to their strength, durability, and ability to support heavy loads. They provide a stable and secure structure for workers to access elevated areas during construction or maintenance projects.

Q:What is the process of coating steel pipes?: The process of coating steel pipes involves several steps. First, the pipes are cleaned and prepared to remove any dirt, grease, or rust. Then, a primer is applied to the surface of the pipes to enhance adhesion. After the primer dries, a coating material such as epoxy, polyethylene, or zinc is applied using various methods like spraying, dipping, or wrapping. This coating material not only provides protection against corrosion but also acts as a barrier against external elements. Finally, the coated pipes are cured or dried to ensure the coating adheres properly and forms a durable layer, ready for use in various industries such as oil and gas, water supply, or construction.

Q:Are steel pipes suitable for fire protection systems?: Yes, steel pipes are suitable for fire protection systems. They have excellent fire resistance properties and can withstand high temperatures, making them ideal for conveying water or other fire suppressants in fire protection systems. Steel pipes are also strong, durable, and resistant to corrosion, ensuring long-term reliability and effectiveness in fire protection applications.

Q:Can steel pipes be used for wastewater treatment systems?: Yes, steel pipes can be used for wastewater treatment systems. Steel pipes are commonly used in wastewater treatment systems due to their durability, corrosion resistance, and ability to handle high pressure and flow rates. Moreover, steel pipes can be easily welded, making them suitable for various configurations and applications within the wastewater treatment process.

Q:How are steel pipes protected against external corrosion in coastal areas?: To safeguard steel pipes against external corrosion in coastal regions, a combination of coating and cathodic protection methods is employed. An effective approach involves applying a protective coating onto the steel surface, forming a barrier against corrosive elements like saltwater and humidity present in the coastal environment. Commonly used coating materials, such as epoxy or polyethylene, possess corrosion-resistant properties and offer long-lasting protection. Furthermore, cathodic protection is utilized to enhance the corrosion resistance of the steel pipes. This technique employs sacrificial anodes or impressed current to prevent corrosion. Sacrificial anodes, typically made of zinc or aluminum, are attached to the steel pipe and corrode in place of the steel, sacrificing themselves to safeguard the steel surface. On the other hand, impressed current systems rely on an external power source to provide a protective current, effectively preventing corrosion. Ensuring the effectiveness of the protective coating and cathodic protection system necessitates regular inspection and maintenance. Coatings may degrade over time due to wear and tear, requiring periodic evaluation and reapplication if necessary. Similarly, sacrificial anodes must be replaced when depleted, and impressed current systems need to be monitored and adjusted to maintain the desired level of protection. By combining the application of durable coatings with cathodic protection measures, steel pipes in coastal areas can be adequately shielded against external corrosion, promoting their durability and optimal performance.

Q:How are steel pipes used in the telecommunications infrastructure?: Steel pipes are commonly used in telecommunications infrastructure for the installation of underground cables. These pipes provide protection and support to the cables, ensuring their longevity and efficient functioning. Additionally, steel pipes are used for the construction of telecommunication towers, providing a sturdy framework for antennas and other equipment.

Q:Are steel pipes suitable for pharmaceutical manufacturing facilities?: Yes, steel pipes are suitable for pharmaceutical manufacturing facilities. Steel pipes are commonly used in pharmaceutical manufacturing due to their excellent corrosion resistance and durability. They can withstand high pressure and temperature conditions, making them ideal for various applications such as transporting fluids, gases, and chemicals within the facility. Additionally, steel pipes can be easily cleaned and sanitized, ensuring the integrity and safety of pharmaceutical products. Furthermore, steel pipes are cost-effective and have a long service life, making them a reliable choice for pharmaceutical manufacturing facilities.

Q:Can steel pipes be used for the construction of railway tracks?: No, steel pipes cannot be used for the construction of railway tracks. Railway tracks require specially designed rails made of steel, which are laid on sleepers or ties and secured with fasteners to provide stability and support for trains. Steel pipes do not possess the necessary shape or strength required for this purpose.

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