SPIRAL STEEL PIPE 42’‘ ASTM API LARGE DIAMETER PIPE

SPIRAL STEEL PIPE 42’‘ 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:What are the environmental benefits of using steel pipes?: Using steel pipes has multiple environmental benefits: 1. Longevity: Steel pipes have a prolonged lifespan, minimizing the need for frequent replacements. This conserves resources and reduces waste generation. 2. Recyclability: Steel is extensively recycled worldwide. When steel pipes reach the end of their life, they can be easily recycled and used to produce new steel products. This reduces the demand for raw materials and saves energy that would otherwise be necessary for manufacturing new materials. 3. Decreased carbon emissions: Steel pipes have a lower carbon footprint compared to materials like concrete or plastic. The manufacturing process emits fewer greenhouse gases, contributing to an overall lower carbon footprint. 4. Corrosion resistance: Steel pipes exhibit high resistance to corrosion, requiring less maintenance and repair compared to other materials. This reduces the need for chemical coatings and treatments that can have detrimental environmental effects. 5. Water conservation: Steel pipes are commonly used in water supply and distribution systems. Their smooth interiors minimize friction, reducing the energy required to pump water through the pipes. This conserves energy and decreases carbon emissions associated with water transportation. 6. Fire resistance: Steel pipes are inherently fire-resistant, making them a safer choice for various applications. In the event of a fire, steel pipes help contain the spread of flames and minimize environmental damage. In summary, the use of steel pipes provides numerous environmental benefits, including durability, recyclability, reduced carbon emissions, water conservation, and fire resistance. These factors make steel pipes a sustainable option for various infrastructure projects.

Q:How are steel pipes connected in pipeline construction?: Steel pipes are connected in pipeline construction through various methods such as welding, threading, and flanging. Welding involves joining the pipes using heat and fusion, creating a strong and durable connection. Threading involves screwing two pipes together using threads on the ends of the pipes. Flanging involves connecting the pipes by bolting together flanges on the ends of each pipe. These connection methods ensure a secure and leak-proof pipeline system.

Q:What is the difference between steel pipes and HDPE pipes?: Steel pipes and HDPE pipes are both commonly used for various applications, but they differ in their composition and characteristics. Steel pipes are made from a combination of iron and carbon, offering high strength, durability, and resistance to extreme temperatures and pressure. They are commonly used in industries like oil and gas, construction, and plumbing. On the other hand, HDPE pipes are made from high-density polyethylene, a thermoplastic material known for its flexibility, corrosion resistance, and lightweight nature. HDPE pipes are often used in water supply and drainage systems, as well as for underground and aboveground applications. Ultimately, the choice between steel pipes and HDPE pipes depends on the specific requirements of the project, including factors such as cost, application, and environmental conditions.

Q:How are steel pipes stored and transported?: To ensure the safety and prevent damage of steel pipes, a systematic and efficient approach is employed for their storage and transportation. In terms of storage, designated areas are used to either horizontally or vertically stack the pipes. In the case of vertical stacking, custom-made racks or stands are utilized to provide support and prevent rolling or collapsing. This method not only saves space but also allows for easy accessibility when required. To safeguard steel pipes against corrosion and environmental elements, a layer of paint or other protective materials is often applied. Furthermore, pipes may be stored indoors in warehouses or storage facilities to shield them from unfavorable weather conditions. In terms of transportation, depending on the distance and destination, steel pipes are typically loaded onto trucks, railcars, or ships. Specialized equipment such as cranes or forklifts is employed to handle and load the pipes onto these vehicles. To prevent movement during transit, the pipes are tightly secured using straps, chains, or braces. This ensures stability and eliminates the risk of damage to the pipes themselves or other cargo. For long-distance transportation, steel pipes are often transported in bundles or stacks, reinforced to provide additional security. They may also be packed in protective coverings or containers to shield them from moisture, dust, or impacts. Overall, the storage and transportation of steel pipes necessitate meticulous planning, proper handling, and appropriate protective measures to uphold their integrity and quality throughout the entire process.

Q:Can steel pipes be used for underground steam pipelines?: Yes, steel pipes can be used for underground steam pipelines. Steel pipes are commonly used for various types of pipelines, including steam pipelines, due to their strong and durable nature. Steel pipes have the ability to withstand high temperatures and pressures, making them suitable for transporting steam underground. Additionally, steel pipes have excellent corrosion resistance properties, which is important for underground pipelines as they are exposed to moisture and potentially corrosive elements in the soil. Overall, steel pipes are a reliable and commonly used choice for underground steam pipelines.

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:What is the maximum allowable deflection for steel pipes?: The maximum allowable deflection for steel pipes is typically determined by industry standards and design codes. These standards and codes specify the acceptable limits of deflection to ensure the structural integrity and functionality of the pipes. The maximum allowable deflection varies depending on various factors such as the pipe diameter, wall thickness, material properties, and the type of application. It is important to consult the relevant standards and codes, such as the American Society of Mechanical Engineers (ASME) B31.3 code for process piping or the American Water Works Association (AWWA) standards for water transmission and distribution pipes, to determine the specific maximum allowable deflection for a particular steel pipe application. Following these guidelines helps to ensure the safe and efficient operation of steel pipes in various industries and applications.

Q:What are the different types of hangers used for supporting steel pipes?: There are several different types of hangers used for supporting steel pipes, each with its own unique design and purpose. Some of the most common types include: 1. Clevis Hangers: These hangers consist of a U-shaped loop that is attached to a support structure using a threaded rod. The pipe is then placed inside the loop and secured in place with a bolt. Clevis hangers are often used in vertical pipe runs and provide excellent support and stability. 2. Split Ring Hangers: These hangers are designed with a split ring that wraps around the pipe and is attached to a support structure using a threaded rod. Split ring hangers allow for easy installation and adjustment, making them suitable for various pipe sizes and applications. 3. Pipe Clamps: Pipe clamps are simple and versatile hangers that consist of a metal clamp that wraps around the pipe and is secured to a support structure using screws or bolts. These hangers are available in various designs, such as one-hole, two-hole, or cushioned clamps, to accommodate different pipe sizes and provide stability. 4. Beam Clamps: Beam clamps are specifically designed to attach to overhead support beams or structures. They typically feature a clamp that wraps around the beam and a threaded rod or bolt that attaches to the pipe. Beam clamps are suitable for supporting horizontal pipe runs and are commonly used in industrial and commercial settings. 5. Roller Hangers: Roller hangers are used when there is a need for pipe movement due to thermal expansion or contraction. These hangers consist of a roller that allows the pipe to move freely while still providing support. Roller hangers are commonly used in long pipe runs or where there is a significant temperature variation. 6. Spring Hangers: Spring hangers are designed to support pipes and absorb vibrations or shocks. They consist of a spring element that is attached to a support structure and a rod or rod assembly that supports the pipe. Spring hangers are often used in applications where there is a need for noise reduction or to prevent damage caused by vibrations. These are just a few examples of the different types of hangers used for supporting steel pipes. The choice of hanger depends on factors such as pipe size, weight, location, and specific requirements of the installation. Consulting with a professional or engineer is recommended to ensure the appropriate hangers are selected for each specific application.

Q:How do steel pipes perform in earthquake-prone regions?: Steel pipes perform well in earthquake-prone regions due to their high strength and ductility. They are capable of flexing and absorbing seismic energy, reducing the risk of catastrophic failure. Additionally, steel pipes can be designed with proper reinforcement to withstand ground movements, making them a reliable choice for infrastructure in earthquake-prone areas.

Q:Does seamless steel tube have a bend of 135 degrees?: Other name: 90 degree elbow, right angle bend, love bend, punching elbow, pressing elbow, mechanism bend, welding elbow, etc..Usage: connect two pipes with same nominal diameter or different pipe, make the pipe bend at 90, 45, 180 degrees and various degrees.Bending radius is less than or equal to 1.5 times the diameter of the elbow. It is 1.5 times larger than the pipe diameter and belongs to the elbow

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