hot dipped galvanized scaffolding pipe

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Galvanized Pipe America Standard A53 200g Hot Dipped or Pre-galvanized Pipe

O.D	O.D tolerance	W.T	Thickness Tolerance
1/2-12''	±0.3mm	1.5-12 MM	±8%
Length	3m,4m,5.8m,6m or according customers' requirements
Certificate	ISO9001-2008,EN10210,API,Raw material cert,Mill cert,Reap on site inspection report,SGS,BV
Standard	ASTM A53/ASTM A36 BS1387/BS1139/EN39/EN10219/EN10217/EN10297/EN10296/EN10025 etc
Material	Q195/215/235/345, SS330/400/500, S235JR/S235JQ/S235J2, etc
Inspection	With Hydraulic Testing, Eddy Current , Infrared Test, etc
Technique:	Welded Hot rolled,heat extrusion
Packing	in bundle or in bulk, PVC in blue or in strip
Usage	For construction, Pluid and Greenhouse
Main market:	Middle east,North and South America, East and West Europe, South and southeast Asia,Australia,Africa,
Place of Origin	China
HS code:	73063090
Productivity	2000Ton/Month
Processing	galvanzied,inner and outer stab clean,bevelled oiled,painted black threading,with coupling and plastic caps protected packing in plastic cloths,3PE,FBE,corrosion resistant coating

Q:What are the common applications of steel pipes in the oil and gas industry?: Steel pipes are commonly used in the oil and gas industry for various applications such as drilling, transportation of crude oil and natural gas, and for constructing pipelines and storage tanks. They provide strength, durability, and resistance to corrosion, making them ideal for these critical operations.

Q:How do steel pipes handle water hammer?: Steel pipes can effectively handle water hammer by absorbing the pressure surges caused by sudden changes in water flow. The solid and durable nature of steel helps to dampen the impact and prevent damage to the pipes or other components of the plumbing system. Additionally, steel pipes can be designed and installed with appropriate supports, expansion joints, and water hammer arrestors to further mitigate the effects of water hammer.

Q:What are the different methods of pipe lining for steel pipes?: Pipe lining for steel pipes can be done using various methods, each with its own unique features and benefits. These methods include: 1. Spray lining: A specially formulated coating is sprayed onto the inside of the steel pipe, creating a protective barrier against corrosion and chemical damage. Spray lining is a popular choice for smaller pipes due to its cost-effectiveness and quick installation. 2. Cured-in-place pipe lining (CIPP): This method involves inserting a flexible liner into the steel pipe and then curing it in place using steam or hot water. CIPP restores the pipe's structural integrity and is commonly used for larger pipes without the need for excavation. 3. Slip lining: By inserting a slightly smaller diameter pipe into the existing steel pipe and filling the space between them with cementitious material, slip lining rehabilitates pipes with minor defects and extends their lifespan. 4. Fold-and-form lining: A flexible liner is inserted into the steel pipe and expanded to its diameter using mechanical or hydraulic processes. The liner is then folded and formed to fit the pipe's contours before being cured in place. Fold-and-form lining is suitable for pipes with irregular shapes or bends. 5. Coating lining: A protective coating is applied to the inside surface of the steel pipe using spraying, brushing, or rolling methods. This coating acts as a barrier against corrosion and chemical damage and is commonly used for large pipes or those in harsh environments. Each method has its own advantages and disadvantages, and the selection will depend on factors such as pipe diameter, condition, budget, and project requirements. Consulting with a professional pipe lining contractor is crucial to determine the most suitable method for a specific steel pipe rehabilitation project.

Q:What are the applications of galvanized steel pipes?: Galvanized steel pipes have a wide range of applications in various industries. They are commonly used in plumbing systems to deliver water and gas due to their excellent corrosion resistance. Additionally, they are used in the construction industry for structural purposes, such as scaffolding, fences, and handrails. Galvanized steel pipes are also utilized in the agricultural sector for irrigation systems and as posts for supporting crops. Furthermore, they find usage in oil and gas pipelines, HVAC systems, and automotive manufacturing. Overall, the applications of galvanized steel pipes are diverse, making them an essential material in multiple sectors.

Q:How do you measure the diameter of a steel pipe?: To measure the diameter of a steel pipe, you can use a few different methods depending on the available tools and accuracy required. Here are a few common ways to measure the diameter: 1. Calipers: The most accurate method is to use a set of calipers. Open the calipers to their maximum width and then gently close them around the pipe until they fit snugly. The measurement shown on the calipers will be the diameter of the pipe. 2. Tape measure or ruler: If you don't have calipers, you can use a tape measure or ruler. Wrap the tape measure or ruler around the circumference of the pipe, making sure it is snug but not too tight. Divide the measurement by pi (3.14) to get the diameter. This method may not be as accurate as calipers, but it can give you a rough estimate. 3. String or flexible tape: Another option is to use a piece of string or flexible tape. Wrap the string or tape around the circumference of the pipe and mark where it overlaps. Measure the length of the marked section using a ruler or tape measure. Divide this measurement by pi (3.14) to determine the diameter. 4. Pipe gauge: A pipe gauge is a specialized tool designed specifically for measuring pipe diameter. It consists of a series of circular holes with corresponding diameter labels. Simply insert the pipe into the hole that best fits, and the label will indicate the diameter. Remember, it is essential to measure the diameter at multiple points along the pipe to account for any irregularities or inconsistencies. For accurate measurements, it is recommended to take multiple readings and calculate an average diameter.

Q:What is the difference between ERW (Electric Resistance Welded) and LSAW (Longitudinal Submerged Arc Welded) steel pipes?: ERW steel pipes are manufactured using the process of high-frequency electrical current passing through the metal, creating heat that fuses the edges of the steel together. On the other hand, LSAW steel pipes are produced by submerging the steel plate in a welding zone, where an arc is struck and the edges of the plate are melted and fused together. In terms of the welding technique, ERW pipes use electrical resistance while LSAW pipes use submerged arc welding. Additionally, LSAW pipes are typically used for larger diameter and thicker wall thickness applications, while ERW pipes are commonly used for smaller diameter and thinner walls.

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:What are the common welding techniques used for steel pipes?: The common welding techniques used for steel pipes include shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), and flux-cored arc welding (FCAW). These techniques are widely used in various industries for joining steel pipes due to their efficiency, reliability, and ability to produce strong and durable welds.

Q:Can steel pipes be used for underground compressed air pipelines?: Yes, steel pipes can be used for underground compressed air pipelines. Steel pipes are durable, corrosion-resistant, and have high strength, making them suitable for withstanding the pressure and environmental conditions of underground installations. Additionally, steel pipes can be easily welded and are readily available in various sizes, allowing for flexibility in designing the compressed air pipeline system.

Q:What are the different types of pipe coatings used for corrosion protection?: There are several different types of pipe coatings used for corrosion protection. These coatings are applied to the exterior surface of pipes to prevent or delay corrosion, ensuring the longevity and integrity of the pipes. Some of the commonly used pipe coatings for corrosion protection include: 1. Fusion-Bonded Epoxy (FBE) Coatings: FBE coatings are widely used for corrosion protection due to their excellent adhesion and resistance to chemicals, moisture, and abrasion. These coatings are applied by heating the pipe and spraying it with epoxy powder, which then melts and forms a protective layer upon cooling. 2. Polyethylene (PE) Coatings: PE coatings are known for their flexibility and resistance to impact and chemicals. These coatings are typically applied by extrusion or wrapping methods and provide excellent resistance against water, soil, and other corrosive substances. 3. Polyurethane (PU) Coatings: PU coatings offer good resistance to chemicals, moisture, and mechanical damage. They are commonly used for underground pipelines and are applied by spraying or brush coating methods. 4. Coal-Tar Enamel Coatings: Coal-tar enamel coatings are suitable for protecting pipes exposed to highly corrosive environments such as marine conditions or underground applications. They are typically applied by hot or cold wrapping methods and provide excellent resistance to water, acids, and alkalis. 5. Metallic Coatings: Metallic coatings such as zinc, aluminum, or zinc-aluminum alloys are often used as sacrificial coatings to protect the underlying steel pipes. These coatings corrode preferentially, sacrificing themselves to protect the pipe from corrosion. 6. Asphalt Coatings: Asphalt coatings provide a robust barrier against moisture, chemicals, and soil. They are typically applied by hot or cold wrapping methods and are commonly used for underground pipelines. It is important to consider factors such as the specific environment, temperature, and expected lifespan of the pipes when selecting the appropriate type of pipe coating for corrosion protection.

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