Carbon black seamless steel pipe DIN17175 ST35

Carbon black seamless steel pipe DIN17175 ST35

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 10000 m.t./month

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1. Commodity Name: Seamless steel pipe

2. Standard: API,GB,ASTM,ASME,DIN

3. Quality grade: 10#, 20#, A106B, A53B, API 5L B, Q235, Q345, ST37-2, ST 45, ST52.etc.

4. Dimension:

OD: 1/2"-24"

WT: 2.5-80mm, SCH10~SCH40~XXL

length: 5.8m,6m,8m,9m,12m

5. Technique: Hot Rolled/Cold Rolled/ Cold Drawn

6. application

carbon seamless steel pipes are widely used in gas, water and oil, transpotation;constructions;Bridge,highway,windows of model steel door; building materials;fences;heating facilities Fluid Pipe;conduit pipe,scaffolding pipe.etc.

7. Payment Terms: L/C D/A D/P T/T

8.packing and shipment

Packaged in bundles,as per customers' requirements, it can also bepackagesd as beveled ends, typed marking, black painting, plastic caps protection,woven bags packing

For 20" container the max length is 5.8m; For 40" container the max length is 12m. other options are available based on customer requests. Please discuss when placing orders.

9. Surface: painted with varnish;

10. Plastic caps at ends.

11. Tolerance: OD +1%/-1%

WT +12.5%/-10%

12. Chemical composition:

Models of Steel Pipes	Chemical Component
Steel 20 (ASTM A106B)	C	Si	Mn	P	S	Cu	Ni	Cr
Steel 20 (ASTM A106B)	0.17~0.24	0.17~0.37	0.35~0.65	0.035max	0.035max	0.25max	0.25max	0.25max
Steel45 (ASTM 1045)	0.42~0.50	0.17~0.37	0.50~0.80	0.035max	0.035max	0.25max	0.25max	0.25max
16Mn(Q345B)	0.12~0.20	0.20~0.55	1.20~1.60	0.035max	0.035max	0.25max	0.25max	0.25max
45Mn2 ( ASTM1345)	0.42~0.49	0.17~0.37	1.40~1.80	0.035max	0.035max	0.3max	0.3max	0.30max

Q: What is the standard length of steel pipes?: The standard length of steel pipes can vary depending on the application and industry, but commonly they are available in lengths of 20 feet or 6 meters.

Q: How do steel pipes perform in high-temperature environments?: Steel pipes perform well in high-temperature environments due to their excellent heat resistance and thermal conductivity. The strength and structural integrity of steel pipes remain largely unaffected, making them ideal for applications such as steam lines, boiler tubes, and high-temperature industrial processes.

Q: How are steel pipes used in the construction of natural gas power plants?: Steel pipes are used in the construction of natural gas power plants for various purposes, including transporting and distributing the natural gas. These pipes are used to connect the gas supply to different components of the power plant, such as turbines, boilers, and generators, ensuring a reliable and efficient flow of gas throughout the facility. Additionally, steel pipes are also used in the construction of the power plant's infrastructure, such as the cooling systems, exhaust systems, and other equipment that require durable and corrosion-resistant materials.

Q: Can steel pipes be used for underground sprinkler systems?: Yes, steel pipes can be used for underground sprinkler systems. Steel pipes are known for their durability and strength, making them a suitable choice for underground applications. They are resistant to corrosion and can withstand high pressure and temperature, making them suitable for delivering water to sprinkler heads. However, it is important to note that steel pipes may require additional coatings or protective measures to prevent rusting and corrosion over time. Additionally, steel pipes may be more expensive than other materials such as PVC or polyethylene, so the cost factor should be considered as well. Overall, steel pipes can be a viable option for underground sprinkler systems, particularly in areas with harsher environmental conditions.

Q: How do you calculate the pipe flow rate coefficient for steel pipes?: To calculate the pipe flow rate coefficient for steel pipes, you need to consider various factors related to the pipe's dimensions, material properties, and the fluid flowing through it. The pipe flow rate coefficient, also known as the discharge coefficient (Cd), is a dimensionless value that represents the efficiency of fluid flow through a pipe. Here are the steps to calculate the pipe flow rate coefficient for steel pipes: 1. Determine the inside diameter (ID) of the steel pipe. This is the measurement of the internal cross-sectional area of the pipe through which the fluid flows. 2. Calculate the pipe's cross-sectional area (A) using the formula: A = π * (ID/2)^2. Here, π is the mathematical constant pi (approximately 3.14). 3. Measure the pressure drop (∆P) across the steel pipe. This is the difference in pressure between the pipe's inlet and outlet. 4. Measure the fluid flow rate (Q) through the pipe. This can be done using flow meters or by measuring the time it takes for a known volume of fluid to pass through the pipe. 5. Calculate the velocity (V) of the fluid flowing through the pipe using the formula: V = Q / A. Here, Q is the fluid flow rate and A is the cross-sectional area of the pipe. 6. Calculate the pipe flow rate coefficient (Cd) using the formula: Cd = Q / (A * √(2 * ∆P / ρ)). Here, ρ is the fluid density. This formula is derived from the Bernoulli's equation and takes into account the pressure drop, fluid flow rate, and fluid density. It is important to note that the pipe flow rate coefficient for steel pipes can vary depending on factors such as pipe roughness, fluid viscosity, and Reynolds number. Therefore, it is advisable to consult relevant engineering standards, such as the Darcy-Weisbach equation or the Hazen-Williams equation, to obtain more accurate values for specific pipe configurations and fluid properties.

Q: How do steel pipes connect to other components?: Steel pipes can be connected to other components using various methods, including welding, threading, flanges, and couplings. These connections ensure a secure and leak-proof joint between the steel pipe and other components, allowing for efficient fluid or gas transfer in various industries.

Q: Why seamless steel pipe called seamless steel pipe?: Seamless steel pipe is a hollow section, without the joint round, square, rectangular steel. Seamless steel tubes are made of ingots or billets made by piercing and are then made by hot rolling, cold rolling or cold casting. Seamless steel pipe with a hollow section, as pipe conveying fluid, compared withsteel and roundsteelinsolid, flexural torsional strength in the same time, the weight is light, is a kind of economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as the oil pipe, automobile transmission shaft, bike frame and construction using steel scaffolding.

Q: How are steel pipes insulated?: Steel pipes are typically insulated using various methods such as applying insulation materials like fiberglass, mineral wool, or foam directly onto the surface of the pipes. This insulation helps to prevent heat loss, control condensation, and protect against corrosion. Additionally, some pipes may also be wrapped with reflective foil or jacketed with a protective covering to enhance insulation efficiency and durability.

Q: What is the maximum length of a steel pipe?: The maximum length of a steel pipe will vary depending on various factors such as manufacturing capabilities, transportation limitations, and practical considerations. However, in general, steel pipes can typically be manufactured and transported in lengths ranging from a few meters to several hundred meters.

Q: What is the difference between seamless and welded steel pipes?: The main difference between seamless and welded steel pipes lies in their manufacturing process. Seamless pipes are made by piercing a solid cylindrical steel billet to create a hollow tube without any welding or joints. On the other hand, welded pipes are formed by rolling a flat steel plate and then welding the edges together to create a cylindrical shape. This welding process introduces a seam along the length of the pipe. Consequently, seamless pipes are typically considered stronger, more reliable, and better suited for high-pressure applications, while welded pipes are more cost-effective and commonly used for less demanding applications.

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