Galvanized Steel Circle Pipe Q345 Grade

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Loading Port:: Tianjin

Payment Terms:: TT or LC

Min Order Qty:: 100 m.t.

Supply Capability:: 1000 m.t./month

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Galvanized Steel Circle Pipe Q345 Grade

Description for Galvanized Steel Circle Pipe :

Type	Galvanized Steel Circle Pipe
Steel Grade	Q345,Q195,215,Q235,
Steel Grade	HRB400E,HRB500E ,Q235 , Q195
Size	DIA 13-25.4mm, 18-25.4mm,25.4-34mm,34-50.8mm,50.8-79.2mm
Thickness	0.5-1.5mm,1.5-2.0mm,0.7-2.0mm,0.8-3.0mm,1.0-3.0mm
Application	Building/project construction
Packing	5.5mm-10mm:packing In coil. 10mm-32mm:in bundle.
MOQ	300tons ( trial order 100tons acceptable ).
Capacity	150000tons /month.
Delivery Time	15days after the order confirmation .
Payment	T/T , West Union , Cash , L/C.
Trade Terms	FOB, CFR, CIF ,EXW
Trans term	FIO , FILO , FLT

Datas Chart for Galvanized Steel Circle Pipe :

Content	C%	Mn%	Si%	P%	S%	V%	Ceq%
HRB335	0.17-0.25	1.00-1.60	0.40-0.80	≤0.045	≤0.045		≤0.52
HRB400	0.20-0.25	1.30-1.60	0.40-0.80	≤0.035	≤0.035	0.05-0.08	≤0.54
HRB500	0.25	1.6	0.80	≤0.045	≤0.045		≤0.55
HRB500E	0.20-0.24	1.20-1.50	0.40-0.65	≤0.045	≤0.045	0.050-0.120	≤0.55

Main Structure of Galvanized Steel Circle Pipe

l Mechanics Performance

Grade	Technical data of the original chemical composition(%)
	C	Mn	Si		S	P	Ceq
HRB500	≤0.25	≤1.60	≤0.80		≤0.045	≤0.045	≤ 0.55
	Mechanical Characterics
	Yield Strength (N/cm2)			Tensile Strength (N/cm2)		Elongation (%)
	≥500			≥630		≥14

l Mechanics Performance

Grade	Technical data of the original chemical composition(%)
	C	Mn	Si	S	P	Ceq
HRB400	≤0.25	≤1.60	≤0.80	≤0.045	≤0.045	≤ 0.54
	Physics capability
	Yield Strength (N/cm2)		Tensile Strength (N/cm2)		Elongation (%)
	≥400		≥570		≥16

FAQ:

Why should you choose us:

Stable quality ----continous casting hot rolled production techenic, strictly quality control system.
Lower price -------Not the cheapest but the lowest price at the same quality .
Good service -----Satisfactory service within 24hours.
Delivery time ------15-25days for the mass production .
Discount---------------discount base on monthly large quantity purchase in long term.

Picture:

Galvanized Steel Circle Pipe Q345 Grade

Q:How do you measure the diameter of a steel pipe?: To measure the diameter of a steel pipe, you can use a caliper or a measuring tape. Place the caliper jaws or measuring tape around the widest part of the pipe, ensuring it is perpendicular to the pipe's axis. Take the reading displayed on the caliper or measure the distance between the two points on the measuring tape. This measurement will provide you with the diameter of the steel pipe.

Q:What are the different types of steel pipe joints?: There are several different types of steel pipe joints, including threaded, welded, flanged, grooved, and compression joints.

Q:What are the different types of steel pipe hangers?: There are several different types of steel pipe hangers, including clevis hangers, riser clamps, beam clamps, strut clamps, and loop hangers. Each type is designed to securely support and suspend pipes in various applications, such as plumbing, HVAC, and industrial systems.

Q:What are the common methods for inspecting the integrity of steel pipes?: Common methods for inspecting the integrity of steel pipes include visual inspection, ultrasonic testing, magnetic particle testing, radiographic testing, and pressure testing.

Q:How are steel pipes protected from damage during transportation?: Various methods are used to protect steel pipes from damage during transportation. One commonly employed technique involves applying protective coatings to the pipes. Materials like epoxy, zinc, or polyethylene are often used for this purpose, creating a barrier between the pipe and external elements. These coatings effectively prevent corrosion and damage during transit. In addition, steel pipes are frequently bundled together and secured using straps or bands. This bundling ensures that the pipes remain in place and prevents any shifting or rolling during transportation. Furthermore, padding or cushioning materials, such as foam or rubber, may be utilized to provide extra protection and reduce the risk of damage from impact or vibration. Sometimes, steel pipes are placed in crates or containers to provide further safeguarding. Crates are designed to snugly fit the pipes, offering a secure enclosure that shields against external forces. On the other hand, containers create a protective environment for the pipes, shielding them from the elements and potential impacts. To guarantee the safe transportation of steel pipes, proper handling and loading techniques are crucial. Pipes should be lifted and loaded onto transport vehicles with care, utilizing suitable equipment like cranes or forklifts to minimize the risk of damage. It is also essential to properly secure the pipes within the transport vehicle to prevent any movement or potential damage during transit. Overall, a combination of protective coatings, bundling, padding, and secure packaging or loading techniques is employed to ensure the safety of steel pipes during transportation. These measures guarantee that the pipes arrive at their destination in optimal condition, ready for use in various applications.

Q:What is the thermal expansion coefficient of steel pipes?: The thermal expansion coefficient of steel pipes is typically around 0.000011 to 0.000012 per degree Celsius, which means that for every degree Celsius increase in temperature, the length of the steel pipe will expand by approximately 0.0011% to 0.0012%.

Q:What are the different methods of pipe protection for steel pipes?: There are several different methods of pipe protection for steel pipes, each serving a unique purpose and providing varying levels of protection. Some of the common methods include: 1. Coatings: Coatings are applied on the external surface of steel pipes to protect them from corrosion and other environmental factors. Coating materials can include various types of paints, epoxies, or polymers. These coatings create a barrier between the pipe surface and the surrounding environment, preventing the steel from coming into contact with corrosive elements. 2. Wrapping: Wrapping involves using a protective material, such as tape or shrink wrap, to cover the steel pipe. This method provides a physical barrier against moisture, chemicals, and other corrosive substances. Wrapping is often used in combination with coatings to enhance the overall protection. 3. Cathodic Protection: Cathodic protection is an electrochemical method used to protect steel pipes from corrosion. It involves connecting the steel pipe to a sacrificial anode, typically made of zinc or magnesium. The anode corrodes instead of the pipe, which helps to prevent the steel from deteriorating. This method is commonly used for buried or submerged pipelines. 4. Thermal Insulation: Thermal insulation is used to protect steel pipes from extreme temperatures. Insulating materials, such as foam or mineral wool, are applied around the pipe to minimize heat transfer. This method is particularly important for pipes carrying hot fluids or exposed to extreme weather conditions. 5. Vibration Dampening: Vibration can cause stress and fatigue on steel pipes, leading to potential damage. To protect against vibrations, various techniques can be employed, such as using vibration damping pads or installing supports and clamps. These methods help to absorb and dissipate the energy generated by vibrations, reducing the risk of pipe failure. 6. Concrete Coating: For pipelines installed underwater or in highly corrosive environments, concrete coating is often used. A layer of concrete or a cement-based mortar is applied to the steel pipe, providing both mechanical protection and resistance to corrosion. It is important to select the appropriate method of pipe protection based on the specific application, environmental conditions, and desired level of protection. Regular inspection and maintenance are also crucial to ensure the long-term integrity of steel pipes.

Q:Can steel pipes be used for irrigation systems?: Yes, steel pipes can be used for irrigation systems. Steel pipes are known for their durability, strength, and resistance to corrosion, making them suitable for use in irrigation systems where they may be exposed to water and various environmental conditions. Additionally, steel pipes can handle high water pressure and are available in different sizes, allowing for efficient water distribution throughout the irrigation system.

Q:How do you calculate the pipe thermal expansion for steel pipes?: To calculate the pipe thermal expansion for steel pipes, you need to consider the coefficient of thermal expansion (CTE) of the material, the temperature change, and the length of the pipe. The CTE is a measure of how much a material expands or contracts with temperature changes. For steel, the average CTE is typically around 12 x 10^-6 per degree Fahrenheit (or 6.5 x 10^-6 per degree Celsius). However, this value can vary depending on the specific grade of steel. Next, determine the temperature change that the pipe will experience. This can be the difference between the operating temperature and the ambient temperature, or the change in temperature due to the fluid or gas flowing through the pipe. Finally, calculate the thermal expansion using the formula: Thermal Expansion = CTE x Length x Temperature Change Where: - CTE is the coefficient of thermal expansion - Length is the length of the pipe - Temperature Change is the difference in temperature For example, if you have a steel pipe with a length of 10 meters (32.8 feet) and a temperature change of 100 degrees Celsius (180 degrees Fahrenheit), and assuming a CTE of 12 x 10^-6 per degree Celsius, the thermal expansion would be: Thermal Expansion = 12 x 10^-6 x 10 x 100 = 0.012 meters (or 12 millimeters) This means the pipe would expand by 12 millimeters due to the temperature change. It's important to note that this calculation provides an estimate of the thermal expansion, but other factors such as pipe supports, restraints, and the specific application should also be considered to ensure the proper design and installation of the steel pipe system.

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.

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