The purchase points and precautions of seamless tube (SMLS tube) mainly include the following aspects:
1. Material selection
The material of seamless steel tube should meet national standards, usually using carbon steel, alloy steel and other materials. The performance of seamless steel pipes of different materials is also different in use, so the material should be selected according to the actual needs.
2. Size requirements
The size of seamless steel tube should comply with national standards, including external diameter, wall thickness and other parameters. In the purchase, according to the actual needs to choose the appropriate size, so as not to cause waste or inconvenience.
3. Surface quality
The surface quality of seamless steel tube should meet national standards, and there should be no obvious cracks, bubbles, scars and other defects. When purchasing, carefully check the surface of the seamless steel pipe to ensure reliable quality.
4. Manufacturer reputation
Choosing a manufacturer with good reputation and perfect after-sales service can avoid a lot of procurement risks. We should understand the production capacity, quality control, after-sales service and other conditions of the manufacturer before purchasing, and confirm that the purchased seamless steel tube is produced by a regular manufacturer and meets the quality requirements.
5. Size deviation
When purchasing, it is also necessary to pay attention to the size deviation of seamless steel tube. In the production process, the length and outside diameter of seamless steel tubes are prone to deviations. Therefore, when purchasing, the size should be strictly controlled to avoid quality problems caused by size deviation.
6. The material is not qualified
Finally, it is necessary to pay attention to whether the material is qualified when purchasing. The material of seamless tube has a crucial impact on its use effect and life. Seamless steel tubes produced by manufacturers with quality inspection certification and reliable production materials should be selected to avoid the purchase of unqualified seamless tubes, which will affect the normal progress and use effect of the project.
7. Uniformity of wall thickness
Wall thickness uniformity is an index that reflects the stability of seamless steel tube in the production process. If the wall thickness is not uniform, it will lead to inconsistent pipe strength and affect the safety of use. Therefore, when purchasing seamless tubes, we should pay attention to whether the wall thickness is uniform.
8. Pressure test
The pressure test is carried out on the selected seamless tube to check whether it meets the design requirements and is safe to use. The pressure test includes strength test and sealing test, which should be operated in accordance with relevant regulations.
9. Other requirements
Depending on the specific use environment and working conditions, there may be other matters that need attention. For example, some pipes need to be resistant to high temperature, corrosion, wear, etc., and the corresponding materials and processes need to be selected.
To sum up, the purchase points and precautions of seamless tube include material selection, size requirements, surface quality, manufacturer credibility, size deviation, material unqualified, wall thickness uniformity, pressure test and other requirements. When purchasing seamless steel tubes, these factors need to be fully considered to ensure that the purchase of the right product and meet the requirements of use.
As a manufacturer of stainless steel and carbon steel tubes, Permanent Steel Manufacturing Co., Ltd. specializes in the production and supply of seamless steel tubes: including thin-wall/thick-wall seamless tubes, precision seamless tubes, seamless mechanical tubing, small-diameter/large-diameter seamless tubes, and various specifications and materials, large inventory, rich experience, can provide customized services according to customer requirements.
