• BS1139  WELDED GALVANIZED PIPE System 1
BS1139  WELDED GALVANIZED PIPE

BS1139 WELDED 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: Are steel pipes suitable for underground compressed air systems?
Generally, steel pipes are suitable for underground compressed air systems. They are a popular choice due to several advantages they possess. First and foremost, steel pipes are renowned for their strength and durability. This enables them to withstand the pressure and stress associated with compressed air systems. They can handle high operating pressures without the risk of bursting or leaking. Secondly, steel pipes exhibit excellent resistance to corrosion. They can endure exposure to moisture, soil, and other elements found underground. This reliability makes them ideal for underground installations where pipes may encounter potentially corrosive substances. Moreover, steel pipes are relatively easy to install and maintain. They can be securely connected through welding or threading, ensuring a leak-free connection. Additionally, inspecting and repairing steel pipes is a simple process, allowing for cost-effective maintenance and repairs. Nevertheless, it is important to consider other factors that may impact the suitability of steel pipes for underground compressed air systems, such as specific requirements and conditions. Consulting a professional engineer or qualified expert is advisable to determine the most appropriate choice for a particular application.
Q: What is the tensile strength of steel pipes?
The grade and type of steel used can cause variation in the tensile strength of steel pipes. However, steel pipes generally possess a high tensile strength. Carbon steel pipes typically have a tensile strength range from 370 to 700 MPa, while alloy steel pipes can have a tensile strength range from 770 to 1200 MPa. These impressive tensile strengths enable steel pipes to withstand substantial pressure and stress, making them suitable for diverse applications in industries like construction, oil and gas, and automotive. It is important to recognize that factors like the manufacturing process, heat treatment, and the presence of defects or imperfections can also impact the tensile strength of steel pipes. Hence, it is recommended to consult the manufacturer's specifications or industry standards to determine the precise tensile strength of a specific steel pipe.
Q: Can steel pipes be used for underground water supply systems?
Yes, steel pipes can be used for underground water supply systems. Steel pipes are durable, strong, and can withstand harsh conditions, making them suitable for underground installations. Their corrosion resistance properties and ability to withstand high pressure make them a reliable choice for transporting water underground.
Q: How are steel pipes tested for quality control?
Steel pipes are tested for quality control through various methods such as visual inspection, dimensional checks, and non-destructive testing techniques including ultrasonic testing, magnetic particle inspection, and hydrostatic pressure testing. These tests ensure that the pipes meet the required specifications, standards, and structural integrity, ensuring their quality and reliability.
Q: What are the different methods of cleaning steel pipes?
There are several methods of cleaning steel pipes, including mechanical cleaning, chemical cleaning, and high-pressure water jetting. Mechanical cleaning involves using wire brushes, scrapers, or sandpaper to physically remove debris and rust from the pipe's surface. Chemical cleaning involves using solvents or acids to dissolve contaminants and rust, followed by flushing the pipe with water. High-pressure water jetting uses a stream of water at high pressure to remove dirt, rust, and other deposits from the pipe's interior and exterior surfaces.
Q: How are steel pipes used in the construction of railways and transportation systems?
Steel pipes are commonly used in the construction of railways and transportation systems for various purposes. One major use of steel pipes in these applications is for the construction of bridges and tunnels. Steel pipes are often used as structural components in the construction of bridges, providing support and stability to the overall structure. In tunnels, steel pipes are used as ventilation shafts, allowing for the circulation of air and removal of fumes, thus ensuring the safety of passengers and workers. Additionally, steel pipes are used for the construction of railway tracks. They are used as supports for the tracks, providing a stable base for the trains to travel on. Steel pipes used in railway tracks are typically coated or galvanized to protect them from corrosion and ensure their longevity. Moreover, steel pipes are used for drainage systems in railway stations and transport hubs, ensuring proper water management and preventing flooding. Another important application of steel pipes in transportation systems is for the construction of signposts and streetlights. Steel pipes are often used as the main structural element in these structures, providing strength and durability. They can be easily fabricated and shaped to meet the specific design requirements, making them a popular choice for these applications. Overall, steel pipes play a crucial role in the construction of railways and transportation systems by providing structural support, ensuring proper ventilation, facilitating drainage, and serving as the main components in various structures. Their strength, durability, and versatility make them an ideal choice for these applications, contributing to the safe and efficient operation of transportation networks.
Q: How are steel pipes protected against ultraviolet (UV) radiation?
Steel pipes can be protected against ultraviolet (UV) radiation through the application of coatings or paints that act as a barrier between the pipe surface and the UV rays. These coatings are specifically designed to resist the damaging effects of UV radiation, such as fading, chalking, or degradation of the steel material. One common method of protection is the use of UV-resistant paints or polymeric coatings that contain special additives or pigments that reflect or absorb UV rays. These coatings not only shield the steel from UV radiation but also provide an additional layer of corrosion protection, extending the lifespan of the pipes. Another method used for UV protection is the application of thermal insulation materials. These insulating materials, such as foam or coatings with reflective properties, are capable of reducing the impact of UV radiation on the steel pipes. They act as a shield, preventing direct exposure to the UV rays and minimizing the potential damage caused by prolonged exposure. It is important to note that the choice of UV protection method depends on various factors, including the specific application, environmental conditions, and the required durability of the steel pipes. Consulting with experts in the field can help determine the most suitable UV protection solution for a particular project or application.
Q: Can steel pipes be used for conveying slurry and slurries?
Yes, steel pipes can be used for conveying slurry and slurries. Steel pipes are known for their durability, high strength, and resistance to wear and corrosion, making them suitable for transporting abrasive materials like slurry. Additionally, steel pipes can handle high pressures and temperatures, making them reliable for conveying slurries in various industries such as mining, construction, and wastewater treatment.
Q: What is the weight of hot galvanized steel tubes? DN150 4mm wall thickness
GB/T3091-2008: DN150 welded steel pipe, wall thickness of 6mm, the theory of the weight of welded steel pipe 24.02kg/m, galvanized steel pipe should be multiplied by the weight coefficient after galvanizing, C, DN150, wall thickness of 6mm, C=1.02, DN150, theoretical weight and wall thickness of 6mm galvanized steel 1.02*24.02= 24.5kg/m.
Q: How are steel pipes classified based on their thickness?
There are three main categories for classifying steel pipes based on their thickness: Schedule, Nominal Pipe Size (NPS), and Wall Thickness. In North America, the Schedule classification is commonly used and refers to the pipe's wall thickness. It is indicated by numbers like Schedule 10, Schedule 40, and Schedule 80, where a higher number means a thicker pipe. On the other hand, the Nominal Pipe Size (NPS) classification is used internationally and refers to the pipe's inside diameter. It is expressed in inches and is usually followed by a schedule number to indicate the wall thickness. For example, NPS 6 Schedule 40 means a pipe with a 6-inch inside diameter and a wall thickness according to Schedule 40. Additionally, steel pipes can be classified based on their wall thickness in millimeters or inches. This classification provides a more precise measurement of the pipe's thickness and is commonly referred to as the "wall thickness" or "wt" in specifications. The wall thickness is measured from the outside diameter to the inside diameter and can be expressed in various units of measurement like millimeters, inches, or gauge. In summary, steel pipes are classified based on their thickness using different systems such as Schedule, Nominal Pipe Size (NPS), and Wall Thickness. These classifications ensure the selection of the appropriate pipe for specific applications, taking into account factors such as pressure requirements, structural integrity, and compatibility with other system components.

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