SPIRAL STEEL PIPE14‘ 16’‘ 18’‘ 20’‘ 24’’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: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;

Q:What are the properties of steel that make it suitable for pipe manufacturing?: Due to its unique properties, steel is highly favored as a material for manufacturing pipes. The exceptional strength and durability of steel allow it to withstand high pressure and extreme temperatures, ensuring the safe transportation of fluids and gases over long distances without the risk of leakage or breakage. Another significant advantage of steel is its resistance to corrosion. Unlike other materials that can degrade when exposed to corrosive substances such as water, chemicals, and gases, steel remains highly resistant to corrosion. This quality makes steel pipes long-lasting and reliable. Furthermore, steel is a versatile material that allows for the production of pipes in various sizes and shapes. This flexibility enables customization to meet specific project requirements, making steel pipes suitable for a wide range of applications, including water supply, oil and gas transmission, sewage systems, and structural support. Moreover, steel possesses excellent thermal conductivity, which is crucial for applications involving the transportation of hot or cold fluids. Steel pipes efficiently transfer heat, ensuring minimal energy loss during the process. Additionally, steel is an environmentally friendly option for pipe manufacturing due to its recyclability. Steel pipes can be recycled and reused, reducing the demand for new raw materials and minimizing waste generation. In conclusion, the properties of strength, durability, corrosion resistance, versatility, thermal conductivity, and recyclability make steel the ideal choice for pipe manufacturing. These properties guarantee the reliability, efficiency, and longevity of steel pipes in various industries and applications.

Q:What is the dimensional stability of steel pipes?: The ability of steel pipes to retain their shape and dimensions in different conditions and external forces is referred to as dimensional stability. Steel pipes are well-known for their exceptional dimensional stability due to the inherent properties of the material. Steel, being a strong and rigid material, can maintain its shape even when subjected to high pressure or temperature fluctuations. This characteristic makes steel pipes highly suitable for applications that demand stability and resistance to deformation, such as plumbing, oil and gas pipelines, and structural supports. In addition to its inherent strength, the dimensional stability of steel pipes is also a result of their manufacturing processes. These pipes are typically produced using methods like seamless or welded construction, ensuring uniformity and consistent dimensions throughout the pipe's length. This precise manufacturing contributes to the dimensional stability of steel pipes. Furthermore, steel pipes are often coated with various protective coatings to increase their resistance to environmental factors. These coatings, such as galvanization or epoxy coatings, not only provide corrosion protection but also enhance the dimensional stability of the pipes by adding an extra layer of strength and durability. In conclusion, the widespread use of steel pipes in different industries is largely attributed to their dimensional stability. Their ability to maintain their shape and dimensions, even in challenging conditions, guarantees reliable and long-lasting performance in various applications.

Q:How do you prevent corrosion in steel pipes?: One effective way to prevent corrosion in steel pipes is by applying a protective coating, such as paint or epoxy, to the surface of the pipes. This barrier creates a physical barrier between the pipe and the surrounding environment, preventing moisture and corrosive agents from coming into direct contact with the steel. Additionally, regular inspection and maintenance of the pipes, including cleaning and repairing any damaged coating, can help identify and address potential issues before they lead to corrosion.

Q:How are steel pipes classified based on their diameter?: Various categories exist for classifying steel pipes based on their diameter. The most commonly used classification system for steel pipes is the nominal pipe size (NPS), which is a set of standard sizes in North America that designate the diameter of the pipe. The NPS is expressed in inches and represents the approximate inside diameter (ID) of the pipe. Steel pipes can be divided into three main categories based on their diameter: small bore, medium bore, and large bore. Small bore pipes have an NPS of 2 inches and below, medium bore pipes have an NPS between 2 and 24 inches, and large bore pipes have an NPS greater than 24 inches. In addition to the NPS classification, steel pipes can also be classified based on their actual outside diameter (OD). This classification is used to determine the compatibility of pipes with fittings and other components. The OD classification is typically expressed in inches or millimeters. Overall, the diameter-based classification of steel pipes provides a standardized system that facilitates the easy identification and selection of pipes for various applications. It ensures compatibility and enables the efficient installation and effective functioning of piping systems in industries such as construction, oil and gas, plumbing, and more.

Q:Can steel pipes be used for underground fire hydrants?: Steel pipes are a suitable choice for underground fire hydrants due to their durability, strength, and corrosion resistance. They are commonly used in underground water supply systems, including fire hydrant installations. Furthermore, steel pipes can withstand high water pressures and offer a reliable and long-lasting solution for fire hydrants. However, it is important to ensure that the steel pipes used for underground fire hydrants are adequately coated or lined to prevent corrosion and maintain their structural integrity over time. Regular maintenance and inspections should also be carried out to detect and resolve any potential problems that may arise.

Q:How are steel pipes insulated?: Steel pipes are commonly insulated using a variety of materials such as fiberglass, mineral wool, or foam insulation. These insulating materials are typically wrapped around the steel pipes to prevent heat loss or gain, as well as to protect against corrosion and condensation. Additionally, a vapor barrier may be applied to further enhance the insulation performance.

Q:How are steel pipes used in the manufacturing of agricultural machinery?: Steel pipes are commonly used in the manufacturing of agricultural machinery for various purposes such as structural support, fluid transportation, and hydraulic systems. They provide durability and strength to the machinery, allowing it to withstand the heavy loads and harsh conditions associated with agricultural activities. Additionally, steel pipes are often used to create the framework and chassis of the machinery, ensuring its stability and longevity in the field.

Q:How can seamless steel tubes be produced?: Seamless steel tubes are made of ingots or billets made by piercing and are then made by hot rolling, cold rolling or cold casting. Seamless steel tube plays an important role in the steel tube industry of our country. According to incomplete statistics, China's existing seamless tube production enterprises about more than 240, seamless steel pipe units about more than 250 units, with an annual output capacity of about about 4500000 tons. From the caliber, 35% of phi 76, less than phi 159-650, accounting for 25%. From the species point of view, the general use of 1 million 900 thousand tons of pipe, accounting for 54%; oil pipe 760 thousand tons, accounting for 5.7%; hydraulic props, precision pipe 150 thousand tons, accounting for 4.3%; stainless steel pipe, bearing tube, automobile tube 50 thousand tons, accounting for 1.4%.

Q:How are steel pipes used in the manufacturing of appliances?: Steel pipes are commonly used in the manufacturing of appliances as they are strong, durable, and resistant to corrosion. These pipes are used for various purposes such as supply and distribution of water, gas, and other fluids, as well as for structural support and framework in appliances. They are often used for creating the internal plumbing systems, ventilation ducts, and electrical conduits in appliances, ensuring efficient functioning and reliability.

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