With the development of society and more and more developed technology, the steel pipe industry is now fully automated. Although it increases the amount of speculation in the construction of plants and equipment, it reduces labor costs and mainly increases the production efficiency.

In the welding production of direct-seam welded pipe, the problem is that, because the specifications of the straight seam are submerged arc welding, if there is a broken wire and insufficient flux during normal welding, it will be trouble. As long as there is a broken wire and the welding can not keep up, such welds are unqualified and should be repaired manually, which is easy to cause accidents if not used in construction. Generally, it is better to have welding problems at both ends, and it is more troublesome to have welding problems in the middle.

Usually used Q345B material is different from carbon steel, 345 belongs to manganese plate, this material is used for high-pressure pipeline, welding requirements are strict, so the broken wire, broken flux, is certainly not qualified, if in and add to the workload, although it is computer automation, but also requires the operator some technology, familiar with the computer and cognition, In this way can not appear in the welding encountered problems.

Some projects require weld detection, ordinary welding and wave welding are different, do not require weld detection of steel pipe, welding is simple, does not need repeated welding, even if there is leakage is not related, such welding is generally used for steel structure, and welding seam detection, welding is relatively slow to repeat welding, The welding joint should be on both sides of the computer automatic welding, and control the welding speed, observe the welding seam, for Q235R material steel pipe engineering is some pressure pipeline, generally need to detect.

If the uniform speed control of flaw detection welding is not good, it is easy to have air holes. If the flux in submerged arc welding is not supplied, there will be air holes. Even if the dirt on the weldment surface is not clean, there will be air holes.

If the current is not up to the welding, the welding is fast, the steel pipe weld is not permeable, and there is no way for the metals to fuse together, such steel pipe welding will certainly appear leakage, for inspection unqualified.

If the metal weldment gap is not clean, the welding joint can not be directly connected with the metal, so the welded steel pipe is also unqualified for inspection.

There are several welding problems, as long as the pressure of the pipeline can be used, not the nature of the project.

The use of wave flaw detection equipment, welding seam detection, porosity, penetration, and weld dirt inclusion, should be carried out, the method can only be carried out manually slowly, there is no professional equipment.

As far as possible to reduce the loss and harm caused by these defects, the corresponding method in welding, a, welding current adjustment. Uniform welding, avoids the appearance of air holes, increases the welding current, and welding cover weld. Avoid not welding through, clean the groove and both sides of the oil, and oxide, in line with the standard welding wire, and avoid inclusions.

With the development of our country more and more, the engineering of straight welded steel pipe is used more and more, at the same time, high requirements are also put forward for the welding of pipe, straight welded steel pipe is familiar, also known as straight welded pipe, this kind of steel pipe is mainly the welding technology to control, there are two kinds of welding methods, one is automatic submerged arc welding, one is high-frequency resistance welding, automatic submerged arc welding is programmed by computer, There is a kind of flux, that is, welding automatically under the flux. High-frequency resistance welding is mainly for 219-630mm small-size straight seam steel pipe. It is a kind of welding through high current and high-temperature dissolution, both of which can meet the requirements of flaw detection.

In the use of pipelines, especially oil pipelines and gas pipelines, the construction scale is constantly expanding. One of the important requirements of the construction project is the welding requirements of the pipeline, which is directly related to the construction of the entire oil and gas pipe project. Once there is a little problem, it is directly related to the collapse of the entire municipal buried pipeline. Give in half an inch.

Points that should be paid attention to in welding, automatic submerged arc welding should not be broken wire or lack of welding flux. In the case of these two problems, welding should not be continued at the disconnection, and the computer should be re-edited and welded from scratch. At the same time, a mark should be made at the disconnection, and the disconnection should be tested after welding. The current and temperature should be re-modulated. This welding method does not need to start from scratch. This is temperature fusion, and it can be disconnected to continue welding.

After the welding is completed, wave flaw detection is also carried out. The problem of flaw detection is very finished products. The material of straight seam steel pipe manufacturers is welding protection flaw detection, which can be purchased at ease.

Cangzhou Shenlong Pipe mainly produces seamless steel pipe, straight seam steel pipe, and spiral steel pipe, but also can process galvanized, anti-corrosion coating, has more than 20 years of production history, reliable quality, is a qualified supplier of BP oil, Petro China.