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:What is the cost of steel pipes compared to other materials?: The cost of steel pipes is generally higher compared to other materials due to its durability, strength, and versatility. However, it provides excellent long-term value and is often preferred for its reliability and resistance to corrosion, making it a worthwhile investment for various applications.

Q:Seamless steel pipe 8162 and 8163 what is the difference?: 8163 GB is fluid delivery tube, need to use eddy current detection, fluid transport, liquid, gas, solid, such as natural gas, water, gas, coal and stone, 8162 and 8163 of the popular point that is 8163 more than 8162 senior, 8163 inspection, 8162 inspection. I hope you understand！

Q:What are the safety considerations while handling steel pipes?: When handling steel pipes, some key safety considerations include wearing appropriate personal protective equipment (PPE) such as gloves, safety glasses, and steel-toe boots to protect against potential injuries. It is important to be cautious of the weight and size of the pipes, using proper lifting techniques and equipment to prevent strains or accidents. Additionally, workers should be mindful of the sharp edges and potential for cuts or punctures, ensuring they have a clear and organized workspace to minimize the risk of tripping or falling. Regular inspections of the pipes for any damages or defects are also crucial to prevent accidents and maintain a safe working environment.

Q:What is the process of coating steel pipes?: The process of coating steel pipes involves applying a protective layer on the surface of the pipe to prevent corrosion and increase its durability. This typically includes cleaning the pipe to remove any contaminants, followed by applying a primer to improve adhesion. The pipe is then coated with a layer of paint or a specialized coating material using a variety of techniques such as spraying, dipping, or electrostatic application. The coated pipe is then cured or dried to ensure the coating adheres properly. This process helps to ensure the longevity and performance of steel pipes in various applications.

Q:How are steel pipes tested for leakage?: Steel pipes are typically tested for leakage using various methods such as hydrostatic testing, ultrasonic testing, or dye penetrant testing. Hydrostatic testing involves pressurizing the pipe with water or another suitable liquid to a predetermined level and checking for any pressure drop over a specific period of time, indicating potential leakage. Ultrasonic testing utilizes high-frequency sound waves to detect any defects or cracks in the pipe wall that may cause leakage. Dye penetrant testing involves applying a colored liquid to the surface of the pipe, which seeps into any cracks or openings, making them easily visible under specific lighting, thus identifying potential leaks.

Q:What material is RHS in the steel tube?: RHS is a rectangular hollow section steel. The RHS structure represents a rectangular hollow section steel.

Q:How are steel pipes used in the construction of solar power plants?: Steel pipes are commonly used in the construction of solar power plants for various purposes. They are primarily utilized for the installation of solar panel mounting structures, which require sturdy and reliable support systems. Steel pipes are also used for the construction of infrastructure such as frames, racks, and supports for the solar panels. Additionally, they are employed in the installation of water and coolant systems, as well as for the transmission of fluids and gases within the plant. Overall, steel pipes play a crucial role in providing structural integrity and efficient functionality to solar power plants.

Q:How long do steel pipes last?: There are several factors that can influence the lifespan of steel pipes. These factors include the quality of the steel used, the installation environment, and the maintenance and care provided to the pipes. Steel pipes are generally recognized for their durability and long life. When properly installed and regularly maintained, steel pipes can endure for many decades, sometimes even surpassing 50 years. However, it is important to consider external factors that can greatly impact their lifespan, such as corrosion, exposure to extreme temperatures, and chemical reactions. To ensure the reliability and functionality of steel pipes for an extended period, it is crucial to conduct regular inspections, make timely repairs, and apply protective coatings.

Q:What are the common standards for coating and lining of steel pipes?: Various organizations and regulatory bodies have outlined the common standards for coating and lining steel pipes to ensure their durability, corrosion resistance, and overall quality. These standards are widely recognized and utilized in different industries. Here are some examples: 1. The American Society for Testing and Materials (ASTM) has developed numerous standards for coating and lining steel pipes. For instance, ASTM A775/A775M addresses epoxy-coated reinforcing steel, ASTM A1064/A1064M focuses on metallic-coated steel wire, and ASTM A1057/A1057M covers fusion-bonded epoxy-coated steel reinforcement. 2. The American Water Works Association (AWWA) has established standards specifically for coating and lining steel pipes used in the water industry. AWWA C210 deals with liquid epoxy coating systems for both the interior and exterior of steel water pipelines, while AWWA C213 focuses on fusion-bonded epoxy coating for these pipelines. 3. The National Association of Corrosion Engineers (NACE) develops standards and recommended practices for corrosion control in steel pipes. NACE SP0169 provides guidelines for selecting and applying coatings for underground or submerged steel pipelines, and NACE SP0198 offers recommendations for external coatings of steel pipelines. 4. The International Organization for Standardization (ISO) has also developed various standards pertaining to coating and lining steel pipes. ISO 21809-1 specifies the requirements for external coatings applied to buried or submerged pipelines, while ISO 21809-2 concentrates on the internal coating and lining of such pipelines. These standards encompass multiple aspects of the coating and lining process, including surface preparation, application methods, minimum coating thickness, adhesion, and quality control. Adhering to these standards ensures that steel pipes receive proper protection against corrosion, abrasion, and other forms of deterioration. Consequently, they enjoy a longer service life and enhanced performance in industries such as oil and gas, water supply, and infrastructure.

Q:How to descaling galvanized steel pipe?: Is red rust or white rust, red rust is the base material rust, white rust is Zinc Coating Rust

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