The key points and precautions for purchasing seamless pipes & tubes mainly include the following aspects:
1. Material selection
The material of seamless pipes should comply with national standards and is usually made of carbon steel (
seamless carbon steel), alloy steel and other materials. Seamless steel pipes of different materials have different performances in use, so the material should be selected according to actual needs.
2. Size requirements
The size of seamless pipes should comply with national standards, including outer diameter, wall thickness and other parameters. When purchasing, choose the appropriate size according to actual needs to avoid waste or inconvenience.
3. Surface quality
The surface quality of seamless pipes should comply with national standards and should not have obvious cracks, bubbles, scars and other defects. When purchasing, carefully check the surface of seamless steel pipes to ensure reliable quality.
4. Manufacturer credibility
Choosing a manufacturer with good reputation and complete after-sales service can avoid many purchasing risks. Before purchasing, you should understand the manufacturer's production capacity, quality control, after-sales service, etc., and confirm that the purchased seamless steel pipe is produced by a regular manufacturer and meets the quality requirements.
5. Dimensional deviation
You also need to pay attention to the dimensional deviation of seamless pipes when purchasing. During the production process, the length, outer diameter and other dimensions of seamless steel pipes are prone to deviations. Therefore, the dimensions should be strictly controlled when purchasing to avoid quality problems caused by dimensional deviations.
6. Unqualified material
Finally, when purchasing, you need to pay attention to whether the material is qualified. The material of seamless pipes has a crucial impact on its use effect and lifespan. Seamless steel pipes produced by manufacturers with quality inspection certification and reliable production materials should be selected to avoid purchasing unqualified seamless steel pipes, which will affect the normal progress and use effects of the project.
7. Wall thickness uniformity
Wall thickness uniformity is an indicator that reflects the stability of seamless pipes during the production process. If the wall thickness is uneven, it will lead to inconsistent pipe strength and affect the safety of use. Therefore, when purchasing seamless steel pipes, pay attention to whether the wall thickness is uniform.
8. Pressure test
Conduct a pressure test on the selected seamless steel pipe to check whether it meets the design requirements and is safe to use. The pressure test includes strength test and sealing test, and must be performed in accordance with relevant regulations.
9. Other requirements
Depending on the specific usage environment and working conditions, there may be other matters that need attention. For example, some pipes need to be resistant to high temperatures, corrosion, wear, etc., and corresponding materials and processes need to be selected.
To sum up, the key points and precautions for purchasing seamless pipes include material selection, size requirements, surface quality, manufacturer credibility, dimensional deviation, unqualified material, wall thickness uniformity, pressure test and other requirements. When purchasing seamless pipes, these factors need to be fully considered to ensure that the appropriate product is purchased and meets the usage requirements.
Read more: Seamless Steel Pipe Size
