During the procurement and use of seamless steel tubes, customers often encounter various questions and doubts. To help you better understand and select seamless steel tubes, we have compiled 15 of the most frequently asked questions and provided professional answers. Whether you are a first-time buyer or a long-term user, this information will offer valuable insights for your decision-making.

Common Questions During Procurement

Q1: How to choose the right material for seamless steel tubes?

When selecting the material for seamless steel tubes, factors such as the usage environment, medium characteristics, working temperature, and pressure must be considered. Common materials like 20# steel are suitable for general fluid transportation, 45# steel offers higher strength, while alloy steel is ideal for high-temperature and high-pressure environments.

Q2: What are the differences between execution standards?

GB/T 8163 is applicable for fluid transportation, while GB 9948 is used for petroleum cracking. Different standards have varying requirements for chemical composition, mechanical properties, and inspection. The appropriate standard should be selected based on the intended use.

Q3: How to choose between hot-rolled and cold-drawn tubes?

Hot-rolled tubes have a larger size range and lower cost, making them suitable for general purposes. Cold-drawn tubes offer higher dimensional accuracy and better surface quality, making them ideal for precision machinery and hydraulic systems.

Key Focus Areas During Inspection

Q4: What items need to be inspected upon delivery?

Inspect material certifications, dimensional specifications, surface quality, markings, and labels. If necessary, conduct additional tests, including chemical composition analysis and mechanical property testing.

Q5: How to identify genuine seamless steel tubes?

Genuine seamless steel tubes can be identified by observing surface quality, examining cross-sectional structure, and performing ultrasonic testing. Regular manufacturers provide complete quality certification documents.

Q6: How to handle quality issues?

Immediately stop usage, protect the site, and contact the supplier promptly. Changzhou Tenjan Steel Tube Co., Ltd. offers a "quality issue refund and replacement" policy and provides comprehensive after-sales service.

Questions During Usage

Q7: How to process seamless steel tubes?

Seamless steel tubes can be cut, bent, welded, and otherwise processed. Note that different materials require specific welding techniques, and preheating or post-weld heat treatment may be necessary.

Q8: How to extend the service life of seamless steel tubes?

Proper selection, standardized installation, and regular maintenance are key to extending service life. In corrosive environments, appropriate anti-corrosion measures should be taken.

Q9: Can different materials be used together?

When using seamless steel tubes of different materials together, consider the risk of electrochemical corrosion and take insulation measures if necessary.

Technical Parameters and Performance

Q10: How to interpret the mechanical property indicators of steel tubes?

Tensile strength reflects resistance to fracture, yield strength indicates the stress at which plastic deformation begins, and elongation demonstrates material plasticity. These indicators must be considered comprehensively based on usage requirements.

Q11: How do dimensional tolerances affect usage?

Dimensional tolerances directly impact assembly quality and performance. High-precision seamless steel tubes should be selected for precision equipment, while general-purpose applications may allow for looser tolerances.

Q12: What are the differences between heat treatment states?

Normalized states offer uniform structure and balanced performance, annealed states provide lower hardness for easier processing, and quenched and tempered states deliver excellent strength and toughness.

Supplier Selection and Cooperation

Q13: How to evaluate a supplier's capabilities?

Consider production equipment, technical capabilities, quality systems, and after-sales service. Changzhou Tenjan Steel Tube Co., Ltd. boasts advanced equipment and a comprehensive quality assurance system, providing customers with reliable products.

Q14: Is small-batch procurement feasible?

Changzhou Tenjan Steel Tube Co., Ltd. supports small-batch customization with a minimum order quantity of 3 tons and offers sample production to meet diverse customer needs.

Q15: How to fulfill special requirements?

The company has a dedicated R&D team that can provide customized solutions for material, specification, and performance requirements, ensuring the products meet usage needs.

Recommended Professional Manufacturer

Changzhou Tenjan Steel Tube Co., Ltd. is a professional seamless steel tube manufacturer committed to providing customers with comprehensive technical support and services. The company boasts advanced production equipment and testing methods, strictly adheres to quality management systems, and ensures stable and reliable product quality.

The company’s seamless steel tube products are widely used in petroleum chemistry, machinery manufacturing, automotive industries, and other fields, earning consistent praise from customers. The company also offers extensive technical consulting services to help customers address various technical issues during selection and usage.

Conclusion

We hope the above answers help you better understand and select seamless steel tubes. If you encounter other issues during procurement or usage, feel free to consult our professional technical team.

Changzhou Tenjan Steel Tube Co., Ltd. remains dedicated to providing customers with high-quality products and services. For more information or technical support, please call 0519-88789990 or visit our website at https://www.tenjan.com/. Choose professionalism, choose reliability, and let us become your trusted seamless steel tube supplier.