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:How are steel pipes coated for underground applications?: Steel pipes are typically coated for underground applications using a variety of methods, including but not limited to hot-dip galvanizing, epoxy coating, and polyethylene wrapping. These protective coatings help prevent corrosion, increase the lifespan of the pipes, and ensure their reliability in underground environments.

Q:How do steel pipes compare to other pipe materials like PVC or copper?: Steel pipes have distinct advantages over other pipe materials like PVC or copper. Firstly, steel pipes are extremely durable and can withstand high pressure and temperature, making them suitable for various industrial applications. They also have a longer lifespan compared to PVC or copper pipes, reducing the need for frequent replacements. Moreover, steel pipes are highly resistant to corrosion and chemical reactions, ensuring a consistent flow of water or other substances. However, steel pipes are generally more expensive and require skilled labor for installation. PVC pipes, on the other hand, are lightweight, cost-effective, and easier to install, but they may not be as durable or resistant to extreme conditions. Copper pipes are known for their excellent heat conductivity and resistance to fire, but they are more expensive and require more maintenance. Ultimately, the choice between steel, PVC, or copper pipes depends on the specific requirements of the project and the factors of cost, durability, and functionality.

Q:How can galvanized steel tubes be painted on the surface?: Suitable for galvanized base material (antirust primer), epoxy zinc yellow primer (double component), epoxy ester zinc yellow primer.Pretreatment of galvanized sheet when brushing:1, conditional, you can zinc plating phosphating treatment, or first spray a layer of phosphating primer.2, or smooth zinc plating surface sweeping treatment.3, the galvanized workpiece, galvanized pipe surface with solvent (that is, epoxy zinc yellow primer, thinner) wipe, in order to remove the workpiece crude oil protective layer, and increase cleanliness.4, two-component epoxy zinc yellow primer: in strict accordance with the proportion of paint and curing agent paint, and aging 30 minutes later, modulation suitable construction viscosity, you can spray.One component epoxy ester primer: zinc yellow construction viscosity suitable to construction of modulation, the correct construction method.

Q:What are low-pressure carbon steel tubes?: Pipe fittingsA pipe fitting is a piece of pipe that is connected to a pipe. According to the connection method can be divided into socket type pipe fittings, threaded fittings, flange fittings and welding pipe four categories. Multipurpose; made of the same material as pipes. Elbow (elbow), flange, three pipe and four pipe (crosshead) and reducer (reducer) etc.. Elbow for pipeline corner; flange for the pipe and pipe interconnected parts, connected to the pipe end, three pipe for three pipe collection; four pipe for four tubes together place; for two pipes of different diameters connected to different diameter pipe.

Q:Can steel pipes be used for oil refineries?: Yes, steel pipes can be used for oil refineries. Steel pipes are commonly used in oil refineries due to their durability, high strength, and resistance to corrosion, making them suitable for transporting crude oil and refined products under high pressure and harsh conditions.

Q:Can steel pipes be used for solar power systems?: Yes, steel pipes can be used for solar power systems. Steel pipes are commonly used for the construction of solar panel frames, mounting systems, and the support structures for solar thermal collectors. They provide durability, strength, and are resistant to weather conditions, making them suitable for various components of solar power systems.

Q:What are the different types of supports used for underground steel pipes?: There are several types of supports commonly used for underground steel pipes, including concrete cradles, saddle supports, and thrust blocks. These supports help distribute the weight and forces acting on the pipe, ensuring its stability and preventing damage.

Q:Can steel pipes be used for underground heat exchange systems?: Underground heat exchange systems can utilize steel pipes, which are known for their durability and strength against the pressure and environmental conditions underground. Steel is resistant to corrosion and can withstand high temperatures, allowing for efficient heat transport. Moreover, steel pipes are readily accessible and cost-effective compared to other materials, which contributes to their widespread use in underground heat exchange systems. Nevertheless, it is crucial to appropriately insulate and safeguard the steel pipes to prevent heat loss and potential harm caused by external elements like moisture or soil displacement.

Q:What are the safety precautions while working with steel pipes?: Some safety precautions while working with steel pipes include wearing appropriate personal protective equipment such as gloves, safety glasses, and steel-toed boots to prevent injuries. It is important to ensure the work area is clear of any obstacles or tripping hazards. Workers should be trained in proper lifting techniques to prevent strain or back injuries. Additionally, it is crucial to follow proper procedures for handling and storing steel pipes to prevent accidents and maintain a safe working environment.

Q:What are the factors to consider when designing a steel pipe system?: To ensure the functionality, durability, and efficiency of a steel pipe system, several factors must be taken into account during the design process: 1. It is crucial to determine the maximum pressure and temperature the system will be exposed to. This information is essential for selecting the appropriate pipe material, thickness, and jointing method to withstand the system's operating conditions. 2. The selection of the right material for the steel pipes is important. Factors such as corrosion resistance, strength, and cost should be considered. Common materials include carbon steel, stainless steel, and alloy steel. 3. Calculating the adequate pipe size and wall thickness is essential to ensure the required flow rate and pressure drop within the system. The pipe size directly affects the system's efficiency and must be chosen based on the anticipated flow rates and pressure losses. 4. Proper support and anchoring are critical to prevent sagging, movement, and stress on the steel pipe system. The design should take into account the weight of the pipes, the fluid being transported, and any external forces acting on the system. 5. Expansion joints or loops should be incorporated to allow for thermal growth and contraction, preventing damage and distortion caused by temperature variations. 6. Understanding the properties of the fluid being transported, such as corrosiveness, viscosity, and potential for sedimentation or scaling, is important in selecting the appropriate pipe material and protective coatings or linings. 7. Consideration should be given to the accessibility of the system for installation, inspection, and maintenance purposes. The design should include proper access points, valves, and fittings to facilitate easy maintenance and repairs. 8. Environmental factors such as extreme temperatures, humidity, or corrosive substances should be taken into account when selecting the pipe material, protective coatings, and insulation. 9. Compliance with industry standards, codes, and regulations is essential. The design should adhere to safety guidelines and applicable building codes to ensure the integrity and longevity of the pipe system. 10. The overall cost of the steel pipe system, including material, installation, maintenance, and energy consumption, should be considered. Balancing cost-effectiveness with performance requirements is crucial in achieving an efficient and economical design. By considering these factors, engineers and designers can create a steel pipe system that is suitable for its intended purpose, ensuring its longevity, reliability, and safety.

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