Seamless steel tubes for high-pressure chemical fertilizer

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Seamless steel tubes for high-pressure chemical fertilizer processmg equipmentStandard：
GB6479 Chinese national standard
Application：
Seamless steel tubes for high-pressure chemical fertilizer processing equipment and pipelines thereof
Model No．of steel tubes：
10、20、16Mn、10MoWVNb、15CrMo、1Cr5Mo、12 Cr2Moetc
.Diamensional tolerances:

Types of steel tubes	Outer diameter		Wall thickness
Cold-rolled tubes	Tube sizes(mm)	Tolerances(mm)	Tube sizes (mm)	Tolerances(mm)
	＞30～50	±0.3	≤30	±10％
	＞50～219	±0.8％	≤30	±10％
Hot-rolled tubes	＞219	±1.0％	＞20	±10％

Mechanical properties：

标准	牌号	抗拉强度（MPa）	屈服强度（MPa）	伸长率（％）	冲击功（J）	低温冲击Akv
GB6479	10	335～490	≥205	≥24	/	－20℃≥18
	20	410～550	≥245	≥24	≥39	－20℃≥18
	16Mn	490～670	≥320	≥21	≥47	－40℃≥21
	10MoWVNb	470～670	≥295	≥19	≥62
	15CrMo	440～640	≥235	≥21	≥47
	1Cr5Mo	390～590	≥195	≥22	≥94
	12 Cr2Mo	450～600	≥280	≥20	≥38

Chemical composition:

Standard codes	Models of steel tubes	Chemical compositions（％）
Standard codes	Models of steel tubes	C	Si	Mn	P	S	Cr	Mo	Ni
GB 6479	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.030	≤0.030	/	/	/
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.030	≤0.030	/	/	/
	16Mn	0.12～0.20	0.20～0.60	1.20～1.60	≤0.030	≤0.030
	10MoWVNb	0.07～0.13	0.50～0.80	0.50～0.80	≤0.030	≤0.030	/	0.60～0.90	/
	15CrMo	0.12～0.18	0.17～0.37	0.40～0.70	≤0.030	≤0.030	0.80～1.10	0.40～0.55	/
	1Cr5Mo	≤0.15	≤0.50	≤0.60	≤0.030	≤0.030	4.00～6.00	0.45～0.60	≤0.60
	12 Cr2Mo	0.80～0.15	≤0.50	0.40～0.70	≤0.030	≤0.030	2.0～2.50	0.90～1.20

NOTE：the residual contents of the elements for the steel 10:Ni≤0.25％、Cr≤0.15％、Cu≤0.20％
the residual contents of the elements for the steel 20:Ni≤0.25％、Cr≤0.25％、Cu≤0.20％、Mo≤0.15％、V≤0.08％
the residual contents of the elements for the steel Ni≤0.30％、Cr≤0.30％、Cu≤0.20％

Q: How are steel pipes used in the manufacturing sector?: Steel pipes are widely used in the manufacturing sector for various purposes such as transporting fluids, gases, and solid materials, as well as providing structural support in buildings and machinery. They are commonly used in industries like oil and gas, construction, automotive, and manufacturing plants for their durability, strength, and resistance to corrosion. Steel pipes enable efficient and reliable transportation of materials, facilitating the manufacturing process and ensuring the smooth operation of industrial systems.

Q: How are steel pipes used in water transportation?: Steel pipes are commonly used in water transportation systems as they are strong and durable, allowing for the safe and efficient delivery of water. These pipes are used to create networks that transport water from sources like reservoirs or treatment plants to homes, businesses, and other areas where water is needed. Steel pipes offer excellent corrosion resistance, ensuring the water remains clean and uncontaminated during transport. Additionally, their seamless construction minimizes leakage and ensures a consistent flow of water, making them an ideal choice for water transportation infrastructure.

Q: Can steel pipes be used for conveying abrasive materials?: Yes, steel pipes can be used for conveying abrasive materials. Steel pipes are known for their durability and resistance to wear and tear, making them suitable for transporting abrasive substances such as sand, gravel, or chemicals. Additionally, steel pipes can handle high pressure and temperature conditions, further contributing to their suitability for conveying abrasive materials.

Q: Can steel pipes be used for conveying potable water?: Yes, steel pipes can be used for conveying potable water. However, it is important to ensure that the steel pipes are coated or lined with suitable materials to prevent corrosion and contamination of the water supply. Regular maintenance and monitoring of the pipes are also necessary to ensure the water remains safe for consumption.

Q: How are steel pipes protected from corrosion?: Steel pipes are protected from corrosion through various methods such as applying protective coatings, using sacrificial anodes, or employing cathodic protection systems.

Q: What is a flange and how is it used in steel pipes?: A flange is a mechanical device that is used to connect two sections of steel pipes together. It consists of a flat or raised ring that is attached to the end of each pipe section. The flange provides a surface for the pipes to be bolted or welded together, creating a secure and leak-proof joint. It also allows for easy disassembly and reassembly of the pipes when necessary. Flanges are commonly used in various industries, such as oil and gas, water treatment, and manufacturing, where the connection between steel pipes needs to be strong and reliable.

Q: Steel pipe is particularly long, how to clean the inner wall of the pipe so that it can be thoroughly cleaned: The urban water supply pipeline cleaning is a very necessary work, it can not only improve the transmission efficiency of pipeline to reduce energy consumption, but also to clear the pipeline dirt, remove two pollution, improve water quality, protect the people's physical and mental health.

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 in various applications within the plants, including cooling systems, steam generation, and transporting fluids. Steel pipes offer excellent strength, durability, and resistance to high temperatures and pressures, making them ideal for handling the demanding conditions present in nuclear power plants. Additionally, steel pipes can be designed to meet the specific requirements of nuclear applications, ensuring their safety and reliability.

Q: Are steel pipes environmentally friendly?: Steel pipes can be considered environmentally friendly due to their high durability and recyclability. Steel is a sustainable material that can be reused multiple times without losing its structural integrity. Additionally, steel pipes have low emission rates during production and can be coated to prevent corrosion, extending their lifespan. However, the environmental impact of steel pipes also depends on factors such as extraction of raw materials and energy consumption during manufacturing.

Q: How are steel pipes protected from damage during transportation?: Steel pipes are protected from damage during transportation through various methods. One common method is the use of protective coatings. Steel pipes are often coated with materials such as epoxy, zinc, or polyethylene to create a barrier between the pipe and external elements. These coatings help to prevent corrosion and damage during transit. Furthermore, steel pipes are often bundled together and secured using straps or bands. This bundling helps to keep the pipes in place and prevents them from shifting or rolling during transportation. Additionally, padding or cushioning materials such as foam or rubber may be used to provide extra protection and minimize the risk of damage from impact or vibration. In some cases, steel pipes may be placed in crates or containers to provide additional protection. Crates are designed to fit the pipes snugly and provide a secure enclosure that prevents external forces from causing damage. Containers, on the other hand, offer a protective environment for the pipes, shielding them from the elements and potential impacts. To ensure the safe transportation of steel pipes, it is also important to consider proper handling and loading techniques. Pipes should be carefully lifted and loaded onto transport vehicles using appropriate equipment, such as cranes or forklifts, to minimize the risk of damage. Proper securing of the pipes within the transport vehicle is crucial to prevent movement and potential damage during transit. Overall, a combination of protective coatings, bundling, padding, and secure packaging or loading techniques are employed to safeguard steel pipes from damage during transportation. These measures help to ensure that the pipes arrive at their destination in optimal condition, ready for use in various applications.

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