SPIRAL STEEL PIPE 24’‘ 26’‘ 28’‘ 32’‘ ASTM API LARGE DIAMETER PIPE

SPIRAL STEEL PIPE 24’‘ 26’‘ 28’‘ 32’‘ 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:How are steel pipes used in the construction of skyscrapers?: Steel pipes are used in the construction of skyscrapers primarily for their strength and durability. These pipes provide structural support and serve as columns, beams, and foundations, helping to distribute the weight and withstand the immense forces exerted on tall buildings. Additionally, steel pipes are used for plumbing and HVAC systems, allowing for efficient water supply, drainage, and climate control throughout the skyscraper.

Q:Can steel pipes be used for the construction of transmission towers?: Yes, steel pipes can be used for the construction of transmission towers. Steel pipes are commonly used in the construction industry due to their strength, durability, and ability to withstand various weather conditions. They provide a reliable and cost-effective solution for supporting the weight and load of transmission towers, making them suitable for this purpose.

Q:How do steel pipes differ from other types of pipes?: Steel pipes differ from other types of pipes in several ways. Firstly, steel pipes are incredibly durable and strong, making them suitable for carrying high-pressure fluids and gases. They have a high resistance to corrosion and can withstand extreme temperatures, making them ideal for various industrial applications. Additionally, steel pipes have a smooth interior surface, which reduces friction and allows for efficient flow of liquids or gases. They are also highly versatile, as they can be easily welded, threaded, or bent to fit specific project requirements. Overall, steel pipes are known for their strength, durability, and versatility, making them a preferred choice in many industries.

Q:Can steel pipes be used for steam applications?: Yes, steel pipes can be used for steam applications. Steel is a widely used material in steam systems due to its high strength, durability, and resistance to high temperatures and pressure. It is commonly used in industries such as power generation, refineries, and petrochemical plants for carrying and distributing steam. However, it is important to ensure that the steel pipes are properly designed, installed, and maintained to withstand the specific conditions and requirements of steam applications.

Q:How are steel pipes used in the manufacturing of appliances?: Steel pipes are commonly used in the manufacturing of appliances for various purposes such as transporting fluids, gases, and air within the appliance, providing structural support, and acting as conduits for electrical wiring. They are also used for creating ventilation systems and heat transfer mechanisms, ensuring efficient operation and durability of appliances.

Q:How are steel pipes classified based on their thickness?: There are three main categories for classifying steel pipes based on their thickness: Schedule, Nominal Pipe Size (NPS), and Wall Thickness. In North America, the Schedule classification is commonly used and refers to the pipe's wall thickness. It is indicated by numbers like Schedule 10, Schedule 40, and Schedule 80, where a higher number means a thicker pipe. On the other hand, the Nominal Pipe Size (NPS) classification is used internationally and refers to the pipe's inside diameter. It is expressed in inches and is usually followed by a schedule number to indicate the wall thickness. For example, NPS 6 Schedule 40 means a pipe with a 6-inch inside diameter and a wall thickness according to Schedule 40. Additionally, steel pipes can be classified based on their wall thickness in millimeters or inches. This classification provides a more precise measurement of the pipe's thickness and is commonly referred to as the "wall thickness" or "wt" in specifications. The wall thickness is measured from the outside diameter to the inside diameter and can be expressed in various units of measurement like millimeters, inches, or gauge. In summary, steel pipes are classified based on their thickness using different systems such as Schedule, Nominal Pipe Size (NPS), and Wall Thickness. These classifications ensure the selection of the appropriate pipe for specific applications, taking into account factors such as pressure requirements, structural integrity, and compatibility with other system components.

Q:How are steel pipes used in the shipbuilding industry?: Steel pipes are used in the shipbuilding industry for various purposes including the construction of the ship's hull, piping systems, and structural components. They are utilized for their strength, durability, and corrosion resistance, playing a crucial role in ensuring the structural integrity, fluid transportation, and overall safety of the ships.

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 are the advantages of using steel pipes in the manufacturing industry?: There are several advantages of using steel pipes in the manufacturing industry. Firstly, steel pipes are known for their high strength and durability, making them ideal for carrying heavy loads and withstanding harsh conditions. Secondly, steel pipes have excellent resistance to corrosion, reducing the risk of leaks and ensuring a longer lifespan. Additionally, steel pipes offer a wide range of sizes and shapes, allowing for flexibility in design and easy customization. Furthermore, steel pipes are cost-effective compared to other materials, as they require minimal maintenance and have a low risk of failure. Lastly, steel pipes are environmentally friendly, as they are fully recyclable and contribute to reducing carbon emissions during manufacturing. Overall, the advantages of using steel pipes in the manufacturing industry make them a reliable and efficient choice for various applications.

Q:What are the different grades of steel used for manufacturing pipes?: The different grades of steel commonly used for manufacturing pipes include carbon steel, alloy steel, and stainless steel.

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