SPIRAL STEEL PIPE 42’‘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:Can steel pipes be used for conveying compressed air?: Yes, steel pipes can be used for conveying compressed air. Steel pipes are known for their high strength and durability, making them suitable for handling high-pressure applications such as compressed air systems. Additionally, steel pipes are resistant to corrosion and can withstand extreme temperatures, making them a reliable choice for conveying compressed air.

Q:What are the different testing methods used for steel pipes?: There are various testing methods used for steel pipes, including non-destructive testing methods such as ultrasonic testing, magnetic particle testing, radiographic testing, and liquid penetrant testing. These methods help detect any defects or flaws in the pipes, ensuring their quality and integrity. Additionally, destructive testing methods such as tensile testing, impact testing, and hardness testing are also used to evaluate the mechanical properties of the steel pipes.

Q:What are the different methods of pipe support for steel pipes?: Various methods exist for supporting steel pipes, each aimed at guaranteeing pipe stability, alignment, and protection. Some frequently employed techniques are as follows: 1. Pipe Hangers: These devices suspend or bear the weight of the pipe from above. Typically crafted from metal, they can be adjustable or fixed, allowing for easy installation and maintenance. Depending on the application, pipe hangers can take the form of clevis hangers, beam clamps, or pipe rollers. 2. Pipe Shoes: These supports attach directly to the underside of the pipe, providing a stable resting surface. Usually made from steel or other durable materials, pipe shoes prevent pipe movement, absorb vibrations, and distribute weight evenly. They find common use in applications involving high temperatures or requiring thermal expansion. 3. Pipe Clamps: These devices fasten pipes together or secure them to structures. Constructed primarily of metal, pipe clamps come in various sizes and designs to accommodate different pipe diameters and configurations. They provide support and prevent sagging or movement, particularly in areas with directional or elevation changes. 4. Pipe Racks: These structures are custom-designed to support multiple pipes in an organized and secure manner. Commonly found in industrial settings like refineries or power plants, pipe racks store or support large quantities of pipes. Typically made of steel, they can be tailored to suit different pipe sizes and layouts. 5. Pipe Guides: These devices facilitate pipe movement control, especially during thermal expansion or contraction. Fixed to the structure, pipe guides offer a sliding surface that accommodates longitudinal pipe movement. They are frequently utilized in applications involving temperature variations, such as steam or hot water systems. These represent just a few examples of the numerous methods available for supporting steel pipes. The choice of support method depends on factors such as pipe size, weight, temperature, and specific application requirements. Selecting the appropriate support method is crucial to ensure pipe longevity and integrity while preventing issues like sagging, misalignment, or failure.

Q:What are the different grades of steel pipes?: The different grades of steel pipes vary based on their chemical composition and physical properties. Some commonly used grades include carbon steel pipes (grades A, B, and C), alloy steel pipes (grades P1, P5, P9, and P11), stainless steel pipes (grades 304, 316, and 321), and duplex steel pipes (grades 2205 and 2507). Each grade offers specific characteristics suited for different applications and industries.

Q:How are steel pipes graded?: Steel pipes are graded based on several factors to determine their quality and suitability for specific applications. The grading system for steel pipes typically includes parameters such as the chemical composition, mechanical properties, manufacturing method, and testing standards. 1. Chemical composition: Steel pipes are graded based on the elements present in their composition. This includes the amount of carbon, manganese, phosphorus, sulfur, and other alloying elements. The chemical composition greatly influences the pipe's strength, corrosion resistance, and other properties. 2. Mechanical properties: The mechanical properties of steel pipes are crucial for determining their strength, flexibility, and resistance to pressure and temperature. These properties include tensile strength, yield strength, elongation, hardness, and impact toughness. Pipes with higher mechanical properties are generally graded higher. 3. Manufacturing method: Steel pipes can be manufactured using various methods, such as seamless, welded, or ERW (Electric Resistance Welding). The manufacturing method affects the pipe's integrity, dimensional accuracy, and overall quality. Seamless pipes, for example, are considered to have higher quality due to their uniformity and absence of weld seams. 4. Testing standards: Steel pipes are graded based on their adherence to specific testing standards. These standards ensure that the pipes meet the required quality criteria and are suitable for their intended applications. Common testing standards include ASTM (American Society for Testing and Materials), API (American Petroleum Institute), and EN (European Norms). Based on these factors, steel pipes are often graded using alphanumeric codes or specifications. For instance, pipes used in oil and gas industry may be graded as API 5L (American Petroleum Institute) or pipes used for structural purposes may be graded as ASTM A500 (American Society for Testing and Materials). In conclusion, steel pipes are graded based on their chemical composition, mechanical properties, manufacturing method, and adherence to testing standards. These grades help customers and manufacturers in selecting the appropriate pipes for specific applications, ensuring safety, durability, and efficiency in various industries.

Q:What is the role of steel pipes in the aerospace industry?: Steel pipes in the aerospace industry serve various critical roles, primarily in the construction of aircraft structures and engines. They are commonly used for fuel and hydraulic systems, as well as for carrying pressurized air and gases. Steel pipes provide strength, durability, and resistance to high temperatures and pressure, ensuring the safety and reliability of aerospace components. Additionally, they contribute to fuel efficiency by reducing weight and minimizing fuel leakage.

Q:How are steel pipes used in the mining and mineral processing industry?: Steel pipes are commonly used in the mining and mineral processing industry for various purposes such as transporting liquids, gases, and slurries, as well as providing structural support for mining infrastructure. These pipes are highly durable and resistant to corrosion, making them suitable for harsh and demanding environments. They are used for tasks such as transporting water for mining operations, carrying tailings and waste materials, and conveying mining chemicals. Additionally, steel pipes are utilized in the construction of mine shafts, tunnels, and processing plants, providing a strong and reliable framework for mining operations.

Q:Can steel pipes be used for solar energy systems?: Yes, steel pipes can be used for solar energy systems. Steel pipes are commonly used for the construction of solar panel mounting structures and the transportation of heated fluids in solar thermal systems. They offer strength, durability, and resistance to high temperatures, making them suitable for various components of solar energy systems.

Q:What are the different types of steel pipe bends for pipeline routing?: There are several types of steel pipe bends commonly used for pipeline routing, including 90-degree bends, 45-degree bends, and 180-degree bends. Additionally, there are long radius bends and short radius bends, which refer to the curvature of the bend. These different types of bends allow for flexibility in pipeline design and routing to accommodate various installation requirements and project constraints.

Q:What's the use of steel pipe?: Steel pipe is not only used to transport fluid and powder solid, exchange heat energy, and manufacture mechanical parts and containers, but also is an economic steel. It can reduce weight and save 20 to 40% of metal by using steel pipe to make building structure, network frame, prop and mechanical support. Moreover, it can realize factory mechanization construction. (

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