TP347HStainless steel pipe

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The TP347H stainless steel pipe is a kind of austenitic stainless acid resistant steel, with good resistance to intergranular corrosion resistance and good corrosion resistance, mainly used in aerospace, petrochemical, food, paper and other industries.

TP347H stainless steel is austenitic stainless acid resistant steel, are widely used in aerospace, petrochemical, food, paper and other industries, such as the exhaust duct and branch of aero engine turbine compressor, heat pipes and parts of not more than 850 DEG C under the working conditions in a small load and temperature.

The characteristics of TP347H stainless steel pipe is corrosion, intergranular anti good in acid, alkali, salt solution, have good corrosion resistance.

The physical constants of TP347H stainless steel pipe:

Melting point: the temperature of 1398-1427 DEG C

Specific heat capacity: 500J (kg.K)

The elastic modulus at 20 DEG C: 196GPa, 200 DEG C to 400 DEG C for 186GPa, 177GPa, 500 degrees 167GPa, 600 DEG C for 167GPa

Specific resistance: 0.75nN.m

Chemical composition of TP347H stainless steel pipe:

C: = 0.10, Si: = 1 Mn: = 2 Cr:17.0-20.0 Ni:9.0-13.0 Nb:8 * C%-1.5 S: = 0.030 P: = 0.035

Mechanical properties of TP347H stainless steel pipe:

20 C: 559-637 235-274 53-61 63-69 20.6-27.4

500 C: 392-429 147-216 28-36 56-66 23.5-28.4

600 C: 363-382 137-186 28-34 54-65 24.5-30.4

650 C: 304-363 118-167 31-38 54-61 23.5-31.4

700 C: 245-304 31-42 44-60 24.5-29.4

Heat treatment of TP347H stainless steel pipe:

The temperature of 1000-1100 DEG C solid solution treatment, water cooling

Corrosion resistance of TP347H stainless steel pipe:

Uniform corrosion

Intergranular corrosion by sulfuric acid with copper sulphate and copper scrap method (T method), copper and sulfuric acid sulfuric acid method (L method) and 65%HNO3 method (X method) test

Antioxidation: at 750-800 DEG C in the air, the antioxidant properties of this steel has stable

Q: What are the different methods of repairing steel pipes?: There are several methods for repairing steel pipes, including welding, pipe wrapping, pipe lining, and pipe bursting. Welding involves fusing the damaged sections of the pipe using heat and pressure. Pipe wrapping involves using a fiberglass or epoxy resin wrap to reinforce and seal the damaged areas. Pipe lining involves inserting a new pipe into the damaged one, creating a seamless and corrosion-resistant inner lining. Pipe bursting involves replacing the damaged pipe by using a bursting head to break it apart while simultaneously pulling a new pipe into place. The choice of method depends on the nature and extent of the damage, as well as other factors such as cost and accessibility.

Q: What is the difference between steel pipe and fiberglass pipe?: Steel pipe and fiberglass pipe differ in terms of their material composition, flexibility, resistance to corrosion, and cost. Steel pipe is made of an alloy of iron and carbon, known for its strength and durability, making it a popular choice for plumbing, construction, and industrial projects. In contrast, fiberglass pipe is composed of glass fibers embedded in a resin matrix, resulting in a lightweight and corrosion-resistant material suitable for applications requiring chemical resistance. Another contrasting factor between steel pipe and fiberglass pipe is their level of flexibility. Steel pipe is rigid and stiff, while fiberglass pipe offers greater flexibility, allowing it to bend and conform to different shapes and contours. This flexibility makes fiberglass pipe easier to install in tight spaces or areas with complex geometries. Corrosion resistance is another significant difference between the two materials. Steel pipe is susceptible to corrosion, particularly in environments with high moisture or chemical exposure. To counteract this, steel pipes are often coated or lined with corrosion-resistant materials. In contrast, fiberglass pipe is inherently resistant to corrosion due to its construction, making it a preferred choice for applications in saltwater environments or chemical processing plants. Cost is yet another factor that sets steel pipe and fiberglass pipe apart. Generally, steel pipe is more affordable than fiberglass pipe, especially for smaller diameter pipes. However, as the diameter and pressure rating increase, the cost of steel pipe can exceed that of fiberglass pipe. Additionally, fiberglass pipe requires less maintenance and has a longer lifespan, which can offset the initial cost difference over time. In conclusion, the differences between steel pipe and fiberglass pipe can be summarized in terms of their material composition, flexibility, corrosion resistance, and cost. The choice between these two types of pipes depends on various project requirements, including the application, environment, budget, and expected lifespan.

Q: How do you calculate the pipe head loss for steel pipes?: The Darcy-Weisbach equation is utilized for calculating the pipe head loss in steel pipes. This equation establishes a connection between the head loss (hL) and various factors such as the flow rate (Q), pipe diameter (D), pipe length (L), fluid density (ρ), fluid velocity (V), and the friction factor (f). The formula can be expressed as: hL = (f * (L/D) * (V^2))/(2g) Where: - The head loss (hL) is measured in meters - The friction factor (f) is dimensionless - The pipe length (L) is measured in meters - The pipe diameter (D) is measured in meters - The fluid velocity (V) is measured in meters per second - The acceleration due to gravity (g) is typically taken as 9.81 m/s^2 The friction factor (f) relies on the Reynolds number (Re) of the flow, which is a dimensionless quantity representing the ratio of inertial forces to viscous forces. The Reynolds number can be calculated using the following equation: Re = (ρ * V * D) / μ Where: - The Reynolds number (Re) is dimensionless - The fluid density (ρ) is measured in kg/m^3 - The fluid velocity (V) is measured in meters per second - The pipe diameter (D) is measured in meters - The dynamic viscosity of the fluid (μ) is measured in Pa·s or N·s/m^2 The friction factor (f) can be obtained from empirical correlations or from Moody's diagram, which establishes a connection between the Reynolds number, the relative roughness of the pipe surface, and the friction factor. By substituting the calculated friction factor (f) and other known values into the Darcy-Weisbach equation, the head loss in the steel pipe can be determined. It is important to note that the head loss represents the energy lost due to friction and other factors and is usually expressed in terms of pressure drop or height difference.

Q: How are steel pipes used in the construction of high-rise buildings?: Steel pipes are commonly used in the construction of high-rise buildings for various purposes, such as structural support, plumbing, and fire protection systems. They provide strength and durability to the building's framework, allowing it to withstand heavy loads and extreme weather conditions. Steel pipes also play a crucial role in carrying water, sewage, and other utilities throughout the building, ensuring efficient functionality. Additionally, they are utilized in the installation of fire sprinkler systems, enhancing the safety measures of the high-rise structure.

Q: What are the different methods of measuring the thickness of steel pipes?: There are several methods of measuring the thickness of steel pipes. One common method is using ultrasonic thickness gauges, which send high-frequency sound waves through the pipe and measure the time it takes for the waves to bounce back. Another method is through magnetic induction, which uses a magnetic field to determine the thickness based on the changes in the field caused by the pipe's thickness. Additionally, there are mechanical methods such as using calipers or micrometers to directly measure the thickness of the pipe.

Q: Can steel pipes be used for electrical conduit systems?: No, steel pipes cannot be used for electrical conduit systems as they are conductive and can pose a safety risk. Non-metallic conduits, such as PVC or fiberglass, are commonly used for electrical wiring to ensure insulation and protect against electrical hazards.

Q: Can steel pipes be used for underground fire protection systems?: Yes, steel pipes can be used for underground fire protection systems. Steel pipes are commonly used in these systems due to their durability, strength, and resistance to fire. They can effectively withstand high temperatures and provide reliable and long-lasting protection against fire hazards in underground environments.

Q: Can steel pipes be used for chimney flues?: Yes, steel pipes can be used for chimney flues. Steel pipes are often used in chimney systems due to their durability, heat resistance, and ability to withstand high temperatures. However, it is important to ensure that the steel pipes meet the necessary safety and building code requirements for chimney flues.

Q: How are steel pipes manufactured?: Steel pipes are typically manufactured through a process called seamless or welded pipe manufacturing. In the seamless process, a solid steel billet is heated and pierced to create a hollow tube, which is then stretched and rolled to the desired size and shape. In the welded process, steel sheets are formed into a pipe shape and welded along the seam. These pipes are then further processed and finished before use in various industries.

Q: How seamless steel tube is formed?: Overview of two kinds of steel pipe process:1, cold drawing (rolling) seamless steel pipe: round tube to heating to perforation, annealing, pickling, leading to oil (copper), multi pass drawing (Leng Zha), the blank pipe, heat treatment, straightening, pressure test (testing), marking and warehousing.2. Hot rolling (extrusion seamless steel tube): round tube billet, heating, piercing, three roll cross rolling, rolling or extrusion, removal of pipe, sizing, reducing (diameter or reducing), cooling, blank tube, straightening, water pressure test (or flaw detection), marking and warehousing.

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