SPIRAL STEEL PIPE 32’‘ ASTM / ISO / API/ EN / DIN

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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: How do steel pipes handle ground settlement?: Steel pipes are generally robust and durable, making them well-suited for handling ground settlement. The flexibility and strength of steel allow the pipes to withstand the shifting and settling of the ground without significant damage. Steel pipes have a high resistance to deformation, which means they can maintain their shape and structural integrity even when the ground settles or moves. When the ground settles, steel pipes can accommodate the movement by flexing and bending slightly. This flexibility allows them to adjust to changes in the ground without breaking or cracking. Additionally, steel pipes are often designed with joints that can absorb and distribute stress caused by ground settlement. Furthermore, steel pipes have a smooth interior surface that minimizes friction and resistance to the flow of materials. This feature is particularly important when the ground settles because it reduces the likelihood of clogs or blockages due to debris or sediment settling in the pipes. In summary, steel pipes are well-equipped to handle ground settlement due to their strength, flexibility, and resistance to deformation. They can adapt to the movement of the ground without compromising their structural integrity, making them a reliable choice for various applications, including underground infrastructure and pipeline systems.

Q: Does seamless steel tube have a bend of 135 degrees?: In engineering, it is usually marked as "45 elbow" and has no "135" mark. The angle of the elbow is acute, so there will be no more than 90 degrees elbow.

Q: How are steel pipes protected against mechanical impact?: Steel pipes are protected against mechanical impact through various methods such as adding protective coatings, using steel pipe supports and clamps, or installing protective barriers to absorb and distribute impact forces.

Q: What is the tensile strength of steel pipes?: The grade and type of steel used can cause variation in the tensile strength of steel pipes. However, steel pipes generally possess a high tensile strength. Carbon steel pipes typically have a tensile strength range from 370 to 700 MPa, while alloy steel pipes can have a tensile strength range from 770 to 1200 MPa. These impressive tensile strengths enable steel pipes to withstand substantial pressure and stress, making them suitable for diverse applications in industries like construction, oil and gas, and automotive. It is important to recognize that factors like the manufacturing process, heat treatment, and the presence of defects or imperfections can also impact the tensile strength of steel pipes. Hence, it is recommended to consult the manufacturer's specifications or industry standards to determine the precise tensile strength of a specific steel pipe.

Q: Is the same specification seamless steel pipe more expensive than welded pipe?: Seamless steel pipe having a hollow cross section, used as a conduit for conveying fluids, such as pipelines for transporting petroleum, natural gas, gas, water, and certain solid materials.

Q: How are steel pipes used in the manufacturing of storage tanks?: Steel pipes are commonly used in the manufacturing of storage tanks due to their high strength, durability, and resistance to corrosion. These pipes are typically used as the main structural component of the tank, providing the necessary strength to support the weight of the stored materials. Additionally, steel pipes can be easily welded together, allowing for the construction of large, seamless tanks that can hold various liquids or gases. Overall, steel pipes play a crucial role in ensuring the integrity and longevity of storage tanks.

Q: How do steel pipes connect to other components?: Steel pipes can be connected to other components using various methods such as welding, threading, flanges, or couplings.

Q: What is the difference between hot-dip galvanizing and electroplating of steel pipes?: Hot-dip galvanizing and electroplating are two different methods of applying a protective coating to steel pipes. Hot-dip galvanizing involves immersing the steel pipes in a bath of molten zinc, which creates a thick, durable coating that provides excellent corrosion protection. On the other hand, electroplating involves passing an electric current through a solution containing zinc ions, which causes the zinc to bond to the surface of the steel pipes. While electroplating can provide a thinner coating, it is generally less durable and may require additional layers or coatings for sufficient corrosion resistance.

Q: How are steel pipes protected against external moisture?: Steel pipes are protected against external moisture through a variety of methods. One common method is the application of a protective coating or paint on the surface of the pipes. This coating acts as a barrier, preventing moisture from coming into direct contact with the steel. The coating can be made of different materials, such as epoxy, polyethylene, or zinc, depending on the specific requirements and environment. Another method of protection is through the use of corrosion inhibitors. These inhibitors are added to the internal or external surfaces of the pipes, forming a protective layer that prevents moisture from causing corrosion. Corrosion inhibitors can be in the form of chemicals, such as rust converters or rust preventatives, which react with the steel to form a protective barrier. Additionally, steel pipes can be protected against external moisture through cathodic protection. This technique involves the use of sacrificial anodes or impressed current to create an electric current that protects the steel. Sacrificial anodes, typically made of zinc, aluminum, or magnesium, are attached to the steel pipes and corrode over time instead of the steel, thus preventing moisture-induced corrosion. Furthermore, proper insulation and waterproofing measures are crucial in protecting steel pipes from external moisture. Insulation materials, such as foam or tape, are applied to the pipes to provide an additional layer of protection and prevent moisture infiltration. Waterproofing measures, such as the use of sealants or membranes, can also be implemented to ensure that no moisture seeps into the pipes. Regular maintenance, including inspections and repairs, is essential to ensure the continued protection of steel pipes against external moisture. By promptly addressing any areas of damage or corrosion, the integrity of the protective measures can be maintained, prolonging the lifespan of the steel pipes and preventing costly repairs or replacements in the future.

Q: What are the safety precautions to consider when working with steel pipes?: When working with steel pipes, it is important to follow several safety precautions. Firstly, always wear appropriate personal protective equipment (PPE) such as gloves, safety glasses, and steel-toed boots to protect yourself from potential injuries. Additionally, ensure that the work area is well-lit and clear of any obstructions to prevent tripping hazards. It is crucial to use proper lifting techniques or mechanical lifting equipment when handling heavy steel pipes to prevent strains or back injuries. Furthermore, be cautious of sharp edges or burrs on the pipes, as they can cause cuts or punctures. Finally, when working with welding or cutting equipment, make sure to follow proper procedures and wear appropriate flame-resistant clothing to prevent burns or fire hazards. Overall, prioritizing safety measures and being aware of potential risks are essential when working with steel pipes.

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