SPIRAL STEEL PIPE 56’‘ 60’‘ LARGE DIAMETER PIPE

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 5 m.t.

Supply Capability:: 3000 m.t./month

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Packaging & Delivery

Packaging Detail:	standard export packing or as customer's requirement
Delivery Detail:	within 10 - 30 days

Specifications

Spiral Welded Steel Pipes and Tubes
1.Material:Q195-Q235
2.Length:1-12m
3.WT:1.0-14mm
4.O.D.:20-273mm

Spiral Welded Steel Pipes and Tubes

Product Description:

1.Material : Q235,Q345,L245,L290,L360,L415,L450,L485,GrB,X42,46,X52,X56,X60,X65,X70,X80,X100

2,Standard: SY/T5037-2000,GB/T9711-2011,API Spec 5L PSL1/PSL2,ASTM A252\A53,ISO3183,DIN17172,EN10217,JIS G3457,AWWA C200,ASTM A139,ASTM A671,ASTM A672

3.Wall thickness: 3.0mm-30mm

4.Outer diameter: φ168mm-3020mm

5,Length: 5m-12m or as your requirement

6,Corrosion protection standard: DIN30670,DIN30671, AWWAC210, AWWA C203, SY/T0413-2002,SY/T0414-2002

7,Application: Oil, gas, natural gas, water pipe, thermal electricity pipe, steel structure engineering, etc

Q195-q345 Material Steel Pipe's Materials

Elements Material	Chemical Compsition%					Mechanical Property
	C%	Mn%	S%	P%	Si%	Yield Point (Mpa)	Tensile Strength(Mpa)	Elongation (%)
Q195	0.06-0.12	0.25-0.50	<0.050< span="">	<0.045< span="">	<0.030< span="">	>195	315-430	32-33
Q215	0.09-0.15	0.25-0.55	<0.05< span="">	<0.045< span="">	<0.030< span="">	>215	335-450	26-31
Q235	0.12-0.20	0.30-0.70	<0.045< span="">	<0.045< span="">	<0.030< span="">	>235	375-500	24-26
Q345	<0.20< span="">	1.0-1.6	<0.040< span="">	<0.040< span="">	<0.55< span="">	>345	470-630	21-22

Q: How do you calculate the pipe head loss for steel pipes?: To calculate the pipe head loss for steel pipes, you can use the Darcy-Weisbach equation. This equation relates the head loss (hL) to the flow rate (Q), pipe diameter (D), pipe length (L), fluid density (ρ), fluid velocity (V), and a friction factor (f). The formula is as follows: hL = (f * (L/D) * (V^2))/(2g) Where: - hL is the head loss (measured in meters) - f is the friction factor (dimensionless) - L is the pipe length (measured in meters) - D is the pipe diameter (measured in meters) - V is the fluid velocity (measured in meters per second) - g is the acceleration due to gravity (usually taken as 9.81 m/s^2) The friction factor (f) depends 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 as: Re = (ρ * V * D) / μ Where: - Re is the Reynolds number (dimensionless) - ρ is the fluid density (measured in kg/m^3) - V is the fluid velocity (measured in meters per second) - D is the pipe diameter (measured in meters) - μ is the dynamic viscosity of the fluid (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 relates it to the Reynolds number and the relative roughness of the pipe surface. By substituting the calculated friction factor (f) and other known values into the Darcy-Weisbach equation, you can determine the head loss in the steel pipe. It is important to note that the head loss is a measure of energy loss due to friction and other factors, and it is typically expressed in terms of pressure drop or height difference.

Q: What are the lengths of scaffold steel tubes?: Used to build scaffolding of steel pipes in general have two kinds, an outer diameter 48mm, wall thickness 3.5mm; another kind of outer diameter 51mm, wall thickness 3mm; according to its location and role of different, can be divided into vertical pole, horizontal rod, sweeping rod, etc.. According to the technical specification for construction of steel tubular scaffold with couplers, JGJ 130 - 2011[1]. The scaffolding steel pipe should be specified with the current national standard "GB/T13793" or "straight seam welded steel pipe welded steel pipe for low pressure liquid delivery" GB/T3091 Q235 ordinary steel pipe; steel pipe steel quality should meet the requirements of current national standard grade Q235 steel "carbon structural steel" in GB/T700. The scaffold pipe shall be made of a diameter of 48.3 * 3.6 steel tubes. The maximum mass of each steel tube shall not be greater than 25.8kg.

Q: What are the different types of steel pipes available?: There are various types of steel pipes available in the market, each designed to meet specific requirements in different applications. Some of the commonly used types of steel pipes include: 1. Carbon Steel Pipes: These are the most common type of steel pipes and are primarily made of carbon. They are used in a wide range of applications, including transportation of fluids and gases, structural applications, and plumbing. 2. Stainless Steel Pipes: These pipes are made of an alloy that contains a high percentage of chromium, which provides excellent corrosion resistance. Stainless steel pipes are widely used in industries such as oil and gas, chemical processing, and food processing. 3. Alloy Steel Pipes: As the name suggests, these pipes are made of an alloy that contains a combination of different elements, such as chromium, molybdenum, and nickel. Alloy steel pipes offer enhanced strength, durability, and resistance to high temperatures, making them suitable for applications in power plants, refineries, and petrochemical industries. 4. Galvanized Steel Pipes: These pipes are coated with a layer of zinc to protect them from corrosion. Galvanized steel pipes are commonly used in plumbing systems, water supply lines, and outdoor structures due to their excellent resistance to rust and long-lasting durability. 5. Seamless Steel Pipes: These pipes are manufactured without any welding seam and are often preferred for applications that require high pressure, high temperature, or a smooth inner surface. Seamless steel pipes are commonly used in industries such as oil and gas, automotive, and aerospace. 6. Welded Steel Pipes: These pipes are manufactured by welding two pieces of steel together. They are available in various shapes and sizes and are commonly used in construction, water supply systems, and general engineering applications. 7. ERW (Electric Resistance Welded) Steel Pipes: These pipes are manufactured by passing a high-frequency electric current through the steel strip and then welding the edges together. ERW steel pipes are widely used in oil and gas transportation, structural applications, and fencing. 8. LSAW (Longitudinal Submerged Arc Welded) Steel Pipes: These pipes are made by bending and welding a steel plate into a cylindrical shape. LSAW steel pipes are commonly used in large-scale infrastructure projects, such as oil and gas pipelines and bridge construction. In summary, the different types of steel pipes available include carbon steel pipes, stainless steel pipes, alloy steel pipes, galvanized steel pipes, seamless steel pipes, welded steel pipes, ERW steel pipes, and LSAW steel pipes. The choice of steel pipe type depends on the specific requirements of the application, including factors such as corrosion resistance, strength, temperature, and pressure resistance.

Q: How are steel pipes insulated to prevent freezing?: Steel pipes are insulated to prevent freezing by wrapping them with insulation materials such as foam or fiberglass, which helps to maintain the temperature of the pipe and prevents the transfer of cold air. Additionally, pipes can be buried underground below the frost line to protect them from freezing temperatures.

Q: What's the gate number of the precision steel pipe?: This kind of steel tube and ordinary hot-rolled seamless steel pipe and cold drawn seamless steel tube in the outer surface is different from the outer surface, and the diameter of the smooth finish of precision steel tube, stainless steel color and the same, inside and outside surface due to manufacturing reasons with a layer of oil.

Q: How do steel pipes handle abrasive materials?: Steel pipes are highly resistant to abrasive materials due to their strong and durable nature. The smooth interior surface of steel pipes minimizes friction and wear caused by abrasive materials, making them an ideal choice for handling such substances.

Q: Galvanized steel pipe, PPR pipe, PE pipe, U-PVC pipe and HDPE double wall corrugated pipe and what is the difference between the characteristics of: U-PVC tubes are hard poly vinyl pipes, because they contain chlorine, so they are mainly used in sewer pipes or electrical wiring;HDPE double wall corrugated pipe is a high-density polyethylene pipe, because of its excellent electrical insulation performance, now mainly used for distribution line arrangement.

Q: What are the safety measures to be followed while working with steel pipes?: Some safety measures to be followed while working with steel pipes include wearing appropriate personal protective equipment such as gloves, safety glasses, and steel-toed boots to protect against cuts, burns, and falling objects. It is important to inspect the pipes for any defects or damage before handling them and to use proper lifting techniques to avoid strain or injury. Additionally, workers should be trained on how to properly use cutting and welding equipment to prevent accidents or fires. Regular maintenance and inspections of tools and equipment should be conducted to ensure their safe operation.

Q: Can steel pipes be used for chemical storage tanks?: The utilization of steel pipes for chemical storage tanks is contingent upon the specific application and the composition of the chemicals in question. Steel, being a robust and enduring material, is generally well-suited for a multitude of industrial purposes. Nevertheless, certain chemicals have the potential to corrode steel, thereby compromising the tank's integrity. In such instances, it is imperative to employ corrosion-resistant coatings or linings on the steel pipes to safeguard against chemical reactions. Furthermore, adherence to industry standards and regulations during the tank's design and construction is crucial to guarantee the safe storage of chemicals. Consequently, while steel pipes can indeed be deployed for chemical storage tanks, meticulous consideration must be given to the nature of the chemicals being stored, and appropriate measures must be taken to prevent corrosion and ensure safety.

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