In the industrial sector, understanding and mastering relevant national standards is key to ensuring product quality and safety performance when procuring seamless steel pipes. Different national standards have specific regulations regarding the material, manufacturing process, performance, and application scope of seamless steel pipes. This article provides a detailed interpretation of two of the most commonly used national standards for seamless steel pipes, GB/T 8163 and GB 9948, to assist you in making informed decisions during the procurement process.

GB/T 8163-2018: Seamless Steel Tubes for Fluid Transportation

The GB/T 8163 standard applies to seamless steel tubes for fluid transportation and is one of the most widely used standards in industrial production. This standard clearly specifies the dimensions, shape, weight and permissible deviations, technical requirements, test methods, inspection rules, etc., for the steel tubes.

Seamless steel pipes produced according to the GB/T 8163 standard are primarily used for conveying fluid media such as water, oil, and gas. The standard requires the steel pipes to undergo a hydraulic test. The test pressure is calculated using the formula: P=2SR/D (where S is the wall thickness, R is the allowable stress, and D is the outside diameter). Furthermore, the standard sets specific requirements for the chemical composition, mechanical properties, and technological properties of the steel pipes.

The steel grades covered by this standard include 10, 20, Q345, and several others. Seamless steel pipes of different grades have different applicable temperature and pressure ranges. The appropriate steel grade and quality level should be selected during procurement based on the actual service conditions.

GB 9948-2013: Seamless Steel Tubes for Petroleum Cracking

The GB 9948 standard applies to seamless steel tubes for cracking units in the petrochemical industry. These tubes need to operate in high-temperature, high-pressure, and corrosive environments; therefore, the standard requirements are more stringent.

Compared to GB/T 8163, the GB 9948 standard imposes higher requirements on the chemical composition, mechanical properties, and control of non-metallic inclusions in the steel pipes. The steel grades specified in the standard include alloy steel grades such as 12CrMo, 15CrMo, and 1Cr5Mo, which offer better high-temperature strength and corrosion resistance.

This standard also requires stricter non-destructive testing of the steel pipes, including ultrasonic testing or eddy current testing, to ensure quality reliability. Additionally, it has clear requirements for the decarburization depth and grain size of the steel pipes.

Overview of Other Important Standards

Besides the two standards mentioned above, there are several other important national standards for seamless steel pipes worth noting:

    GB/T 8162-2018: Seamless steel tubes for structures, applicable to general structural steel tubes.

    GB/T 3087-2008: Seamless steel tubes for low and medium pressure boilers.

    GB/T 5310-2017: Seamless steel tubes for high-pressure boilers.

    GB/T 17396-2009: Hot-rolled seamless steel tubes for hydraulic support.

Each standard has its specific scope of application and technical requirements. The corresponding standard should be selected during procurement based on the specific service conditions.

Standard Selection Guide

When selecting a standard for seamless steel pipes, the following factors need to be considered:

    Characteristics of the conveyed medium: Including corrosiveness, temperature, pressure, etc.

    Working environment conditions: Such as indoor/outdoor, humid environments, high-temperature environments, etc.

    Safety requirement level: Especially when used in equipment like pressure vessels and boilers.

    Cost budget factors: The price of steel pipes conforming to different standards can vary significantly.

It is recommended to clarify the usage requirements before procurement and, if necessary, consult with professional technical personnel or manufacturers.

Recommended Professional Manufacturer

Changzhou Tenjan Steel Tube Co., Ltd., as a professional manufacturer of seamless steel pipes, strictly implements various national standards to ensure product quality meets standard requirements. The company's produced seamless steel pipes fully comply with multiple national standards including GB/T 8163 and GB 9948, capable of meeting the application needs of different industries.

The company possesses a complete quality management system and is equipped with advanced production and testing equipment, enabling comprehensive testing of the chemical composition, mechanical properties, and technological properties of steel pipes. Simultaneously, the company also provides professional technical consultation services to help customers correctly understand and select relevant standards, ensuring that the procured seamless steel pipes fully meet the usage requirements.

Changzhou Tenjan Steel Tube Co., Ltd. commits to providing complete quality certification documents for all products, including material reports and test reports, enabling customers to procure with confidence and use with assurance.

Conclusion

Understanding and correctly selecting national standards for seamless steel pipes is crucial for ensuring procurement quality and safe usage. It is recommended that procurement personnel fully understand the usage requirements before selection, choose the applicable standard, and clearly communicate quality requirements to the supplier.

With its deep understanding and strict implementation of national standards, Changzhou Tenjan Steel Tube Co., Ltd. can provide customers with high-quality seamless steel pipe products that meet national standard requirements. To learn more about national standards or for product selection advice, please call 0519-88789990 or visit the official website www.tenjan.com. Choose professionalism, choose standards, let us provide your project with high-quality seamless steel pipes that conform to national standard requirements.