SPIRAL STEEL PIPE 32’‘ CARBON ASTM API DIN ISO

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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	<0.045	<0.030	>195	315-430	32-33
Q215	0.09-0.15	0.25-0.55	<0.05	<0.045	<0.030	>215	335-450	26-31
Q235	0.12-0.20	0.30-0.70	<0.045	<0.045	<0.030	>235	375-500	24-26
Q345	<0.20	1.0-1.6	<0.040	<0.040	<0.55	>345	470-630	21-22

Q: Can steel pipes be used for underground sewer systems?: Yes, steel pipes can be used for underground sewer systems. They are commonly used due to their strength, durability, and resistance to corrosion, making them suitable for handling wastewater and underground installation.

Q: What are the different methods of pipe coating for steel pipes?: There are several different methods of pipe coating for steel pipes, each with its own advantages and applications. One common method is fusion bonded epoxy (FBE) coating. This involves heating the steel pipe and applying a thermosetting powder that melts and adheres to the surface, creating a strong and durable coating. FBE coating provides excellent corrosion protection and is commonly used in the oil and gas industry. Another method is liquid epoxy coating. This involves applying a liquid epoxy resin to the surface of the steel pipe, which then cures and forms a protective barrier. Liquid epoxy coating is often used for smaller diameter pipes and provides good chemical resistance. Polyethylene (PE) coating is another popular method, particularly for pipelines that will be buried underground. PE coating involves wrapping the steel pipe with a layer of polyethylene, which provides excellent resistance to water, chemicals, and abrasion. Polyurethane (PU) coating is another option, offering a high level of chemical resistance and flexibility. It is typically used for offshore applications and in environments with extreme temperatures. Other methods of pipe coating include coal tar enamel (CTE) coating, which provides excellent resistance to water and chemicals, and concrete weight coating, which adds weight to the pipe to ensure stability in underwater or subsea applications. In summary, the different methods of pipe coating for steel pipes include fusion bonded epoxy (FBE), liquid epoxy, polyethylene (PE), polyurethane (PU), coal tar enamel (CTE), and concrete weight coating. The choice of coating method depends on the specific requirements of the application, such as corrosion protection, chemical resistance, or stability.

Q: Are steel pipes suitable for structural purposes?: Yes, steel pipes are suitable for structural purposes. Steel pipes are known for their strength, durability, and versatility, making them an excellent choice for various structural applications. They can withstand heavy loads, provide excellent structural support, and are resistant to corrosion and extreme weather conditions. Steel pipes are commonly used in construction projects, bridges, buildings, and infrastructure systems such as water and gas pipelines. Additionally, steel pipes can be easily welded, bent, and cut to meet specific structural requirements, making them highly adaptable for different construction needs. Overall, steel pipes are widely recognized as a reliable and efficient choice for structural applications.

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 do you solder purple copper plate and steel tube?: When the copper and copper tube size is too large, argon welder welding, DC argon arc welding machine, of course, when DC argon arc welding welding belongs to welding, argon arc welding of brass with Wei Odin 204S welding, the argon arc welding wire for gas welding is not brass wire, this concept must be clear, the wire diameter of 2 80-120A, welding current parameters, if the copper thickness is relatively thick, with a red copper welding after welding preheating in advance.

Q: What are the quality control measures for steel pipe manufacturing?: Quality control measures for steel pipe manufacturing include various inspections and tests to ensure the pipes meet the required standards and specifications. Some common quality control measures include visual inspections for surface defects, dimensional checks to ensure accurate size and length, ultrasonic or magnetic particle testing for detecting internal or surface defects, hydrostatic testing to check for leaks or weaknesses, and chemical analysis to verify the composition of the steel. Additionally, adherence to proper manufacturing processes, documentation of procedures, and regular audits are also part of quality control measures in steel pipe manufacturing.

Q: What are the common applications of steel pipes in industrial settings?: Steel pipes have a wide range of applications in industrial settings, including but not limited to, the transportation of fluids and gases, structural supports in buildings and infrastructure, manufacturing of machinery and equipment, and even in the oil and gas industry for drilling and extraction purposes.

Q: What is the purpose of galvanizing steel pipes?: The purpose of galvanizing steel pipes is to provide them with a protective coating that helps prevent corrosion and extends their lifespan.

Q: Are steel pipes suitable for use in nuclear power plants?: Yes, steel pipes are suitable for use in nuclear power plants. They are commonly used for various purposes including cooling systems, steam generation, and containment of radioactive materials due to their high strength, durability, and resistance to corrosion.

Q: Galvanized steel pipe in addition to good rust resistance, what are the advantages?: It has the characteristics of corrosion resistance and wear resistance, so it can be used longer;

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