Seamless pipe ASTM A53/ASTM A 106/API 5L

Seamless pipe ASTM A53/ASTM A 106/API 5L

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 5000 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:How do steel pipes resist corrosion?: Steel pipes resist corrosion through a process called passivation, where a protective layer of chromium oxide forms on the surface of the steel, preventing direct contact with corrosive elements and slowing down the oxidation process. Additionally, steel pipes can be coated with protective layers such as zinc or epoxy to provide an extra barrier against corrosion.

Q:How are steel pipes used in petrochemical plants?: Steel pipes are widely used in petrochemical plants for various applications including transportation of fluids such as oil, gas, and chemicals. They are used to connect different components of the plant, such as pumps, tanks, and vessels, allowing for the efficient and safe movement of these substances. Steel pipes in petrochemical plants are designed to withstand high pressure and extreme temperatures, ensuring the reliability and durability of the entire system.

Q:How do you determine the weight per foot of a steel pipe?: To ascertain the weight per foot of a steel pipe, there are two primary factors to consider: the pipe's thickness and diameter. Initially, it is necessary to measure the pipe's outer diameter (OD) and wall thickness (WT) using either a caliper or a measuring tape. Upon obtaining these measurements, the inner diameter (ID) can be determined by subtracting twice the wall thickness from the outer diameter (ID = OD - 2 * WT). Subsequently, utilize the formula for the cross-sectional area of the pipe (A = π * (OD^2 - ID^2) / 4) to calculate the cross-sectional area. Lastly, multiply the cross-sectional area by the steel's density, typically around 490 pounds per cubic foot, to derive the weight per foot of the steel pipe. Weight per foot (WPF) = A * 490 It is vital to acknowledge that this calculation provides an approximation of the weight per foot, as manufacturing tolerances and slight variations in steel density may impact the actual weight. Thus, it is advisable to employ this calculation as a reference and consult the manufacturer's specifications for more accurate information.

Q:How do you calculate the pipe flow velocity for steel pipes?: To calculate the pipe flow velocity for steel pipes, you can use the Manning's formula or the Darcy-Weisbach equation. 1. Manning's formula: This formula is commonly used for open channel flow but can also be applied to partially filled pipes. It calculates the velocity based on the pipe's hydraulic radius, slope, and Manning's roughness coefficient. The formula is as follows: Velocity (V) = (1.486/n) * (R^2/3) * (S^1/2) Where: - V is the velocity - n is the Manning's roughness coefficient (which can be obtained from reference tables) - R is the hydraulic radius (cross-sectional area divided by wetted perimeter) - S is the slope of the energy grade line 2. Darcy-Weisbach equation: This equation is widely used for pipe flow calculations and is based on the principle of energy conservation. It calculates the velocity based on the pipe's diameter, roughness coefficient, and the head loss due to friction. The formula is as follows: Velocity (V) = (2 * g * hL)^0.5 Where: - V is the velocity - g is the acceleration due to gravity (approximately 9.81 m/s^2) - hL is the head loss due to friction, which can be calculated using the Darcy-Weisbach equation: hL = (f * L * V^2) / (2 * g * D) Where: - f is the Darcy friction factor (which depends on the Reynolds number and pipe roughness) - L is the length of the pipe - D is the diameter of the pipe Both formulas require some input parameters such as pipe dimensions, roughness coefficients, and slope. These parameters can be obtained from engineering references or pipe manufacturer specifications. It is important to note that these formulas provide approximate values and may require iterations or adjustments for accurate results.

Q:How do you calculate the weight of a steel pipe?: In order to determine the weight of a steel pipe, one must possess knowledge of the pipe's dimensions, specifically the outer diameter (OD), wall thickness, and length. Initially, one must ascertain the cross-sectional area of the pipe. This can be accomplished by subtracting the inner diameter (ID) from the outer diameter (OD) and dividing the outcome by 2 to acquire the radius. Subsequently, the formula A = πr^2 can be employed to compute the area. Following this, it is necessary to multiply the cross-sectional area by the length of the pipe to obtain the volume. The formula for volume is V = A * L, where A denotes the cross-sectional area and L signifies the length. Lastly, to determine the weight of the steel pipe, one must multiply the volume by the density of steel. The density of steel generally falls around 7850 kilograms per cubic meter (kg/m^3) or 0.2836 pounds per cubic inch (lb/in^3). The formula for weight is W = V * ρ, where V represents the volume and ρ denotes the density of steel. It is crucial to note that if one is employing different units, a conversion is imperative to match the units of the density. For instance, if the length is in feet and the density is in pounds per cubic inch, the length must be converted to inches prior to conducting the calculations. Always remember to thoroughly verify your measurements and calculations to ensure precision.

Q:How are steel pipes used in the mining and mineral processing industry?: Steel pipes are commonly used in the mining and mineral processing industry for various purposes such as transporting liquids, gases, and slurries, as well as providing structural support for mining infrastructure. These pipes are highly durable and resistant to corrosion, making them suitable for harsh and demanding environments. They are used for tasks such as transporting water for mining operations, carrying tailings and waste materials, and conveying mining chemicals. Additionally, steel pipes are utilized in the construction of mine shafts, tunnels, and processing plants, providing a strong and reliable framework for mining operations.

Q:How are steel pipes used in tunnel construction?: Steel pipes are commonly used in tunnel construction for various purposes such as drainage, ventilation, and support. These pipes are installed to facilitate the removal of water from the tunnel, ensuring a dry working environment. They also serve as conduits for supplying fresh air and removing exhaust fumes. Additionally, steel pipes are utilized as structural supports, providing stability and reinforcement to the tunnel walls and ceilings.

Q:How are steel pipes protected against external mechanical damage?: Steel pipes are protected against external mechanical damage through various methods. One common method is the use of protective coatings. These coatings provide a physical barrier between the steel surface and external forces, such as impact or abrasion. Coatings can be applied through processes like painting, epoxy coating, or wrapping the pipe with materials like polyethylene or polypropylene. Another method of protection is the use of external casing or encasement. Casing pipes are installed around the steel pipes to provide an additional layer of protection. These casing pipes are typically made of materials like concrete, PVC, or ductile iron, which are resistant to external mechanical damage. Furthermore, steel pipes can be protected by using supports and restraints. Properly designed supports and restraints help to distribute external forces evenly and prevent excessive stress or deformation on the pipe. This includes using hangers, clamps, or brackets to secure the pipe in place and minimize the risk of mechanical damage. In addition, steel pipes can be protected by implementing measures to prevent accidental impacts or collisions. This can involve installing protective barriers, fencing, or warning signs to alert people to the presence of pipelines and prevent unintentional damage. Overall, a combination of protective coatings, casing, supports, and preventive measures is utilized to ensure that steel pipes are safeguarded against external mechanical damage. These measures help to maintain the structural integrity of the pipes and ensure their long-term performance and reliability.

Q:How are steel pipes sized and classified?: Steel pipes are sized and classified based on their outer diameter, wall thickness, and length. The sizing is done using standard measurements such as nominal pipe size (NPS) or nominal diameter (DN). Classification is determined by factors such as the pipe's pressure rating, material composition, and intended use. This helps ensure compatibility and proper installation in various applications such as plumbing, construction, and industrial processes.

Q:Can steel pipes be used for underground sewer lines?: Yes, steel pipes can be used for underground sewer lines.

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