HOT DIPPED GALVANIZED PIPE

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Hot Dip Galvanized seamless steel pipe
Standard: GB,ASTM,DIN,JIS;
Grade: 10#, 20#, 45#, 16Mn;
Length: as customer's demand

Hot Dipped Galvanized Seamless Steel Pipe

1.Standard: ASTM A106,ASTM A53,EN10255,GB/T8162,GB/T8163

2.Material: 10#,20#,ST35,ST37,ST42,ST45

3.Size OD: 18-114.3mm

WT: 2-15mm

Length: 7-12m or according to your requirement.

4.Application: oil and natural gas pipeline, water supply pipeline, boiler, fertilizer factory, chemical

industry, industrial pipeline networks, foundation, construction.

5.Surface: oiled, varnished, black-painted, galvanized, 3PE anti-corrosion, etc

6.Pipe ends:

1). plain end

2). bevelled end

3). both ends threaded, one end with plastic caps protected, the other with socket(couplings) for connecting

4). with hole for casing pipes

5). grooved ends

7.Packing:

1). In bundles, with weaving bags wrapping outside

2). In bare bundles or according to your requirement

Q: Can steel pipes be used for the construction of high-rise buildings?: Yes, steel pipes can be used for the construction of high-rise buildings. Steel pipes offer several advantages such as high strength, durability, and resistance to fire and corrosion. They can be used for various structural elements including columns, beams, and bracing systems, providing a reliable and cost-effective solution for constructing tall buildings.

Q: What are the different methods of pressure testing steel pipes?: There are several methods of pressure testing steel pipes, including hydrostatic testing, pneumatic testing, and ultrasonic testing. Hydrostatic testing involves filling the pipe with water and applying pressure to check for leaks or weaknesses. Pneumatic testing uses compressed air or gas to pressurize the pipe and detect any leaks or failures. Ultrasonic testing utilizes high-frequency sound waves to inspect the pipe's integrity by detecting any flaws or defects.

Q: How long is the seamless tube?: Generally finished seamless steel tubes are less than twelve meters, mainly for the convenience of shipment.In times of rolling (processing), the steel pipe can reach 80 meters or longer.

Q: Can steel pipes be used for underground heat exchange systems?: Yes, steel pipes can be used for underground heat exchange systems. Steel pipes are commonly used for this purpose due to their durability and resistance to corrosion. They can effectively transport and exchange heat in underground systems, making them a suitable choice for such applications.

Q: How do steel pipes handle seismic expansion joints?: Steel pipes handle seismic expansion joints by allowing for movement and flexibility. These pipes are designed to withstand the forces caused by seismic activity, such as earthquakes, by accommodating expansion and contraction without causing damage to the overall structure. The joints in steel pipes are often equipped with specialized components, such as bellows or flexible couplings, that can absorb the movement and prevent excessive stress on the pipeline. This ensures the integrity and safety of the pipeline system during seismic events.

Q: How do you protect steel pipes from external damage?: There are several ways to ensure the protection of steel pipes from external damage: 1. Coating: To prevent external damage, it is advisable to apply a protective coating on the surface of the steel pipes. Different coating options such as epoxy, polyethylene, and fusion bonded epoxy (FBE) can be used. These coatings act as a barrier between the pipes and the surrounding environment, safeguarding them from corrosion, abrasion, and other external factors. 2. Cathodic Protection: Another method to protect the steel pipes from corrosion is by implementing cathodic protection. This involves connecting a less noble metal, either through sacrificial anodes or an impressed current, to the pipes. By doing so, the corrosive elements are attracted to the sacrificial metal, sacrificing it instead of the pipes. This process helps increase the pipes' lifespan and shields them from external damage. 3. Wrapping and Taping: To provide an additional layer of protection, it is recommended to wrap the steel pipes with materials like polyethylene or polypropylene tapes. These tapes act as a barrier against moisture, chemicals, and physical impact, ensuring the pipes are shielded from external damage. Additionally, heat shrink sleeves can be utilized to offer insulation and safeguard against corrosion. 4. Underground Installation: Proper installation techniques are crucial for safeguarding steel pipes from external damage. This includes ensuring appropriate trench depth, using suitable backfill materials, and avoiding excessive bending or stress during the installation process. Employing proper bedding and padding techniques also contributes to the pipes' protection against external factors. 5. Regular Inspection and Maintenance: It is essential to conduct periodic inspections and maintenance to detect any signs of external damage early on. This can involve visual inspections, non-destructive testing, or the utilization of advanced technologies such as pipeline integrity management systems. Timely repairs and maintenance help prevent further damage and extend the lifespan of the steel pipes. In conclusion, protecting steel pipes from external damage necessitates a combination of preventative measures, proper installation techniques, and regular maintenance. By implementing these strategies, the integrity of the pipes can be preserved, preventing corrosion, abrasion, impact, and other factors that could compromise their structural integrity.

Q: Are steel pipes suitable for chemical processing plants?: Due to their exceptional strength, durability, and corrosion resistance, steel pipes find common usage in chemical processing plants. Particularly, stainless steel or alloy steel pipes possess the ability to endure high temperatures, pressure, and the corrosive impact of various chemicals. Consequently, they serve as a suitable means for the safe and efficient transportation and containment of diverse chemical substances. Moreover, the installation, maintenance, and repair of steel pipes are hassle-free, rendering them a cost-effective option for chemical processing plants. Nonetheless, it remains crucial to carefully select the appropriate steel type, taking into account factors such as the specific chemicals being processed, operating conditions, and any potential risks or compatibility issues. Regular inspections and maintenance are also vital for ensuring the integrity and performance of steel pipes in chemical processing plants.

Q: How do you calculate the pipe pressure loss coefficient for steel pipes?: To calculate the pipe pressure loss coefficient for steel pipes, you can use various empirical equations or reference charts specific to the pipe type and size. These equations and charts take into account factors such as pipe roughness, Reynolds number, and flow rate to determine the pressure loss coefficient. It is important to consult relevant engineering references or software to accurately calculate this coefficient for steel pipes.

Q: What's the difference between hot dip galvanizing and cold galvanizing? Which kind of galvanizing method is good?: There are two kinds of hot dip galvanizing, zinc plated and non galvanized. The flowers must be hot-dip galvanized, without flowers, similar to galvanized.

Q: DN150 welded steel tubes one meter multiple: Calculated theoretical weight (Kg) per inch of welded steel pipe = (outside diameter wall thickness) * wall thickness * 0.02466DN150 welded pipe, "150" means nominal diameter of 150mm. Its outer diameter is 165mm.

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