hot dip galvanized seamless grooved pipe

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Galvanized pipe

Our company is specialized in the supply of Hot Dipped Galvanized Pipes. We supply stee pipesl with very competitive price to meet customers' needs with the satisfied service and high standard quality.

Name	galvanized pipe with the standard quality
Material	Q195, Q215, Q235, Q345, STK500
Specification	O.D.: 20- 273.1MM W.T.: 0.8 - 5mm
Length	5.8m, 6m, 11.8m or 12m, or per the buyers demand
Surface treatment	Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Certificates	BS1387-1985, DIN2440/2441, JIS-G3444 and ASTM
Manufacture Technique	Seamless
Section Shape	Round
End	A): GTC (galvanized threaded and coupling) B): GPE (galvanized plain end)
Weight	Billing on the basis of theoretical weight
Packaging Details	Export packing or negotiation
Trade Terms	FOB/CFR/CIF
Payment Terms	L/C T/T
Usage	Petroleum casing pipe/etroleum cracking pipe/gas cylinder tubes/highpressure boiler tubes/ high pressure chemical fertilizer pipe, ship tube
Delivery Time	7-30 days OR upon the negotation
Minimum Order Quantity	20/50/100 MT
Supply Ability	1000 Ton/Month
Inspection	Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

Q:What are the different strategies for pipe laying using steel pipes?: Various strategies exist for laying steel pipes, each tailored to specific environments and needs. Here are a few commonly used approaches: 1. Open Trench: The traditional and widely employed method involves digging a trench along the desired pipeline route. Steel pipes are then placed in the trench, aligned, and welded together. This technique allows for easy access, maintenance, and repair of the pipeline. 2. Direct Pipe: This method is utilized when the pipeline needs to pass beneath obstacles like rivers or highways. It entails drilling a borehole from one side to the other while simultaneously laying the steel pipe. The pipe is subsequently pulled through the borehole, resulting in a continuous pipeline. 3. Horizontal Directional Drilling (HDD): HDD is employed when the pipeline must be installed beneath existing infrastructure or environmentally sensitive areas. A pilot hole is drilled horizontally, and the steel pipe is then pulled through using a reaming tool. This approach minimizes surface disruption and reduces environmental impact. 4. Sliplining: This technique involves inserting a smaller diameter steel pipe into an existing larger pipe. The smaller pipe is pushed or pulled into the larger one, providing a new corrosion-resistant lining. Sliplining is commonly used for rehabilitating deteriorated or damaged pipelines. 5. Microtunneling: Similar to HDD, microtunneling employs a microtunnel boring machine (MTBM) that simultaneously excavates the soil and installs the steel pipe. This method is frequently used for precise pipe laying, particularly in urban areas with limited space. 6. Jacking: Jacking, also referred to as pipe jacking or pipe ramming, is suitable for installing steel pipes in soil conditions that are unsuitable for open trenching. Hydraulic jacks or pneumatic rams are used to push the steel pipe into the ground. Jacking is commonly employed for crossing under railways, roads, or buildings. 7. Offshore Pipeline Laying: When it comes to subsea applications, various techniques can be employed, including S-lay, J-lay, or reel-lay. These methods involve deploying the pipeline from a vessel, either vertically or at an inclined angle, and welding the steel pipes together as they are lowered to the seabed. Each strategy possesses unique advantages and considerations, depending on factors such as terrain, environmental impact, existing infrastructure, and project requirements. It is crucial to thoroughly assess these factors and select the most appropriate pipe laying strategy to ensure the safe and efficient installation of steel pipes.

Q:How are steel pipes protected against corrosion?: Steel pipes are protected against corrosion through various methods such as coating them with protective materials like paint or epoxy, galvanizing them with a zinc coating, or using cathodic protection techniques such as sacrificial anodes or impressed current systems.

Q:How are steel pipes sized and classified?: The primary criteria for sizing and categorizing steel pipes are their outer diameter (OD) and wall thickness. This standardization ensures compatibility and ease of use across different applications. The common approach to sizing steel pipes is through nominal pipe size (NPS), a North American standard that refers to a pipe's OD. NPS sizes span from 1/8 inch to 36 inches, with each size corresponding to a specific OD. For instance, a 1/2-inch NPS pipe has an OD of 0.84 inches, while a 12-inch NPS pipe has an OD of 12.75 inches. It's important to note that the pipe's OD may not precisely match its actual measurement due to historical dimensions. Moreover, steel pipes are categorized into various schedules, which indicate the wall thickness. The most common schedules are SCH 5, SCH 10, SCH 40, SCH 80, and SCH 160, with higher numbers representing thicker walls. These schedules are standardized and aid in selecting the appropriate pipe for specific applications. Additionally, steel pipes can be further classified based on their end connections. The typical types include threaded, plain-end, and socket-weld connections. Threaded pipes possess screw threads on both ends, facilitating easy assembly and disassembly. Plain-end pipes lack threads and are typically joined using welding techniques. Socket-weld pipes have a socket-like end that enables welding with a corresponding fitting. In conclusion, steel pipes undergo sizing and classification based on their outer diameter, wall thickness, and end connections. The nominal pipe size (NPS) denotes the outer diameter, while the schedule number represents the wall thickness. Understanding the sizing and classification of steel pipes is crucial when selecting the appropriate pipe for specific applications in industries like construction, oil and gas, plumbing, and manufacturing.

Q:What is the outer diameter of the steel tube?: The outer diameter refers to the maximum diameter including the thickness of the steel tube, the inner diameter is the length of the hollow part inside, and the outer diameter minus the inside diameter is the thickness of the steel pipe

Q:Are steel pipes suitable for industrial applications?: Yes, steel pipes are highly suitable for industrial applications. Steel pipes offer several advantages that make them the preferred choice for various industries. Firstly, steel pipes have excellent strength and durability, making them capable of withstanding high pressure and heavy loads. This makes them ideal for applications involving transportation of liquids, gases, and solids. Additionally, steel pipes have a high resistance to corrosion, which is crucial in industrial environments where exposure to harsh chemicals, moisture, and extreme temperatures is common. The corrosion-resistant properties of steel pipes ensure a longer lifespan and reduce the need for frequent maintenance and replacements. Moreover, steel pipes have a smooth interior surface, which minimizes friction and allows for efficient flow of materials. This is especially important for industries such as oil and gas, where the smooth flow of fluids is essential for proper operations. Furthermore, steel pipes are available in a wide range of sizes and thicknesses, allowing for customization and flexibility in design. They can be easily welded and connected, enabling easy installation and modification as per the specific requirements of industrial applications. Overall, steel pipes offer a combination of strength, durability, corrosion resistance, and versatility, making them highly suitable and widely used in various industrial applications such as oil and gas, construction, water treatment, power generation, and chemical processing.

Q:What is the pressure rating of steel pipes?: The pressure rating of steel pipes can vary depending on factors such as the size, wall thickness, and specific grade of the steel used. However, steel pipes are commonly available in pressure ratings ranging from a few hundred PSI (pounds per square inch) to several thousand PSI, making them suitable for a wide range of applications.

Q:Can steel pipes be used for transporting liquids?: Yes, steel pipes can be used for transporting liquids. Steel pipes offer excellent strength, durability, and resistance to corrosion, making them suitable for various applications, including the transportation of liquids such as water, oil, and gas.

Q:What are the common sizes of steel pipes available?: The specific industry or application determines the availability of common sizes of steel pipes. However, different industries commonly use several standard sizes. These sizes are usually identified by their nominal pipe size (NPS) or outside diameter (OD). Steel pipes are commonly found in sizes such as 1/8 inch, ¼ inch, ½ inch, ¾ inch, 1 inch, 1 ¼ inch, 1 ½ inch, 2 inch, 2 ½ inch, 3 inch, 3 ½ inch, 4 inch, 5 inch, 6 inch, 8 inch, 10 inch, 12 inch, 14 inch, 16 inch, 18 inch, 20 inch, 24 inch, 26 inch, 30 inch, 36 inch, 42 inch, 48 inch, and 54 inch. These sizes are widely used in various applications, including plumbing, construction, oil and gas pipelines, structural supports, and industrial processes. It is important to note that these sizes may slightly differ according to industry standards or requirements. Moreover, steel pipes are available in different wall thicknesses known as schedules. The most commonly used schedules are schedule 40, schedule 80, schedule 160, and schedule XXS (extra extra strong). The schedule number indicates the pipe's wall thickness, with higher numbers indicating thicker walls. To summarize, the available common sizes of steel pipes range from 1/8 inch to 54 inches in diameter. These sizes are commonly used in different industries and applications, and their wall thickness can vary based on the specific schedule.

Q:How do steel pipes handle high-pressure applications?: Steel pipes are able to handle high-pressure applications due to their inherent strength and durability. They have a high tensile strength and are resistant to deformation under extreme pressure. Additionally, the seamless construction of steel pipes ensures that there are no weak points or joints that can compromise their ability to handle high pressures.

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