The use of
seamless tubes (smls tube) is relatively extensive, and the effect is relatively good. What should be paid attention to in the construction of seamless steel tubes?
1) What kinds of seamless steel pipe materials are there?
There are many kinds, the common ones are the following five: 1. Ordinary carbon structure. 2. High-quality carbon structure. 3.
Alloy steel. 4. Stainless acid-resistant steel. 5. Low alloy steel.
Seamless steel tubes are divided into general purpose (for water, gas pipelines and structural parts, mechanical parts) and special purpose (for boilers, geological exploration, bearings, acid resistance, etc.) according to their uses.
2) What should be paid attention to in the construction of seamless steel tubes?
1. In the process of welding seamless steel tube, it is not necessary to use welding branch pipes, and there should be no welds in the bent position, which not only affects the aesthetic effect, but also is not conducive to long-term use, and it is very easy to cause leakage.
2. Special attention should also be paid to the welding joint of seamless steel pipe. It must be straight and full, and the surface of the welding joint must not have defects such as burn-through, cracking, nodules, and pores, otherwise it will affect Later use will bring unnecessary trouble.
3. The welding wave of the seamless steel tube must be consistent, and the error caused by the misalignment of the pipe must be controlled at about 20% of the wall thickness and within the range of 2mm. If it exceeds this value, it will affect the later use.
4. During the welding process, it is necessary to ensure that there will be no bending at the position of the welding joint, and no wrong joints will occur. Then there is the positioning of electric welding, which is to carry out spot welding at four points, and after straightening, it is necessary to use the form of free conversion to carry out welding work.
