In order to ensure the safe daily operation of equipment, the welding construction of pipeline construction equipment must be strictly controlled to reduce the probability of problems. However, the power plant will inevitably encounter some problems during operation, and these problems are often caused by operational defects in the welding construction during the installation of pipeline construction equipment. There are also many factors that lead to operational defects in welding construction, such as inadequate installation technology, overtime or insufficient supervision.
Here is the content list:
l Attention and prevention points in welding construction of pipeline construction equipment.
l Factors that cause problems during pipeline construction equipment construction.
l Dealing with welding quality problems of pipeline construction equipment.
Attention and prevention points in welding construction of pipeline construction equipment.
Inadequate operation during welding of pipeline construction equipment will leave hidden dangers to engineering safety. When conducting inspection and acceptance of metal welds, relevant technicians need to be careful, careful, and concentrate on studying and judging, and feedback and solve problems as soon as possible . The existing places where the safety quality does not meet the standards should be immediately compensated to ensure that the unit can continue to operate safely and maintain the original economic costs.
When performing welding operations on pipeline construction equipment, technicians must take professional welding measures. In addition, they must also control the quality of plumbing counterparts. In particular, the quality of joints and arc closing must be strictly controlled by technicians.
Therefore, the weld must not be welded in one layer, but two or more layers must be welded, and the inter-level joints must be staggered by more than 10 mm. In order to be able to deal with the weld bead oxidation site, the internal argon must be in place when the stainless steel pipe is welded. At the same time, technicians must strictly control the temperature between layers, and use water cooling for welding if necessary.
Factors that cause problems during pipeline construction equipment construction.
At the same time, it is necessary to find out which environmental factors will affect the welding work of pipeline construction equipment, especially some special welding methods and welding materials have certain requirements on the environment. For example, alkaline electrodes should be in an environment without water, rust and oil, while argon arc welding should be in an environment without wind, water, rust and oil.
According to the welding conditions of different pipeline construction equipment, corresponding protective measures should be taken to ensure welding. stable quality. The welding of pipeline construction equipment usually involves the connection between the weldment and the counterpart, and the quality of the connection will directly affect the quality of the welding.
In order to clarify their responsibilities, the technicians of pipeline construction equipment must inspect and accept the corresponding weldments before starting welding. For peers with unqualified quality, welding technicians can choose to refuse welding.
Violations of regulations must be dealt with seriously. In addition, during spot welding, due to the unstable welding equipment, corresponding stresses will be generated under normal conditions and defects are likely to occur. It is the weakest place in the entire welded joint. We must let welders with relevant qualifications perform spot welding operations.
Dealing with welding quality problems of pipeline construction equipment.
There are always problems of this kind during pipeline construction equipment construction, leading to continuous occurrence of welding quality problems. Once there is a quality problem, we can start from these aspects: First, we must investigate and analyze the cause of the problem. In addition to investigating the person directly responsible for the problem, we must also find out the related reasons.
For example, the management of the construction site is not in place or scientific, and the management personnel are negligent. They should not be deceived by the surface phenomenon of the problem, but should be investigated in depth. When penalties are carried out after the investigation, in addition to punishing the relevant responsible persons, it is also necessary to formulate rewards for those who find problems in advance.
The welding acceptance of pipeline construction equipment is the main link in the welding construction process to control the quality. During the inspection, different inspection methods and inspection ratios need to be adopted for different types of welds to meet the welding quality control requirements.
After the inspection, it is necessary to accurately feedback the specific situation with the relevant process at the first time, and find the cause of the welding quality problem in time, and give improvement measures and suggestions to ensure that the welding quality reaches the standard. The inspection work is usually easily restricted by the inspection environment and conditions.
Therefore, testing can only be carried out on finished products. Generally, there are two popular testing methods: destructive testing and non-destructive testing. In actual work, non-destructive testing is usually adopted, which is also the most common one. In non-destructive testing, air tightness testing and non-destructive testing are often used.
Finally, make a summary of the problem and propose rectification measures. The content of the measures must be implemented, and the time, progress, and person responsible for the rectification shall be clarified. Otherwise, the effect of the rectification will be poor. In short, in the pipeline construction equipment construction process, strictly implementing the welding process, controlling the quality of the counterpart, and reasonably requiring the construction period should be the main points of pipeline construction equipment control. At the same time, in the pipeline construction equipment process, set up the welding process witness point and do a good job in process monitoring.
Orbital welding machine uses electric current to generate a lot of heat between two rails to be welded with large resistance. The welding quality is good and the efficiency is high.
What are the advantages of orbital welding machine?
What are the technical requirements when using the orbital welding machine?
What are the fields of application of orbital welding machines?
The application range of the orbital welding machine is greatly increased, the structure is simple, the cost is low, the purchase cost of the user can be reduced, the installation operation is convenient, the auxiliary operation time is short, and the work efficiency is high. The support flexible rail includes two parallel rails, and each rail includes a strip substrate.
Orbital welding machine shall not be used if the rail has the following conditions:
1. The rail is judged to have internal damage or serious surface injury.
2. The depth of the pit after the top surface of the rail head is damaged and polished:
Weld repair on the line exceeds 8 mm;
Solder repairs over 10 mm outside the line.
3. For scratches, spalling, falling blocks and welding joint wear, low collapse, etc. on the top surface of the rail head, the allowable length of welding repair shall meet the following requirements:
For rail joints (including welded joints) wear and low collapse, the allowable one-time welding repair length is 300 mm, and if the damaged length exceeds 300 mm, it should be divided into two sections for welding repair.
For defects and damages such as scratches, spalling and falling blocks on the top surface of the rail head, the length of one welding repair is allowed to be 200 mm. If the length exceeds 200 mm, it should be divided into two sections for welding repair.
When the rail joints are worn, slumped, scratched and peeled off at the same time, the scratches and peeled off blocks should be dealt with first.
At present, the development of railways is mainly in the direction of high-speed passenger cars, subway passenger cars, light rail cars, high-speed heavy-duty trucks, etc. In order to achieve these needs, it is necessary to reduce the weight of trains. A common practice now is to use aluminum alloy materials in the manufacturing process of passenger cars. Because aluminum alloy materials have the characteristics of light weight, corrosion resistance, smooth appearance, complex curved surfaces, and high specific strength, they can effectively reduce the resistance and quality of passenger cars, and increase the overload. In order to effectively improve the processing efficiency of aluminum alloy materials, it is necessary to change the traditional processing method and use the welding technology of the orbital welding machine for processing and manufacturing.
Wincoo Engineering Co., Ltd has ability of providing workable solutions to support clients to be awarded with shorter project execution time, fewer man-hour costs and higher efficiency construction/fabrication method and better quality during phase of project bidding.
Storage tank jacking system is an important machine for tank construction. The equipment is mainly used for inverted construction of vertical cylindrical steel tank (hydraulic lifting method) in petrochemical industry, inverted construction of steel liner in power plant chimney and inverted construction of vertical cylindrical low temperature tank. I will give you a detailed introduction of the storage tank jacking system.
What are the applications of storage tank jacking system?
What are the features of storage tank jacking system?
What are the types of storage tank jacking system?
1.The hydraulic jacking system are mainly used for vertical tank top to bottom construction.
2.Also it can be used for mega work piece jacking or lifting.
1.The system consists of hydraulic pump station, cylinders, steel wire, and strokes. Easy to installation and operation;
2.The system utilizes PLC central control to handle lift. Each power pack is equipped with auxiliary balance device to guarantee the precision of simultaneously lifting.
3.Hydraulic jacking system pump station has subsidiary manual control and central control two operation models. The cylinder can be adjusted to lift separately or to lift with several others as one group, and multi groups can also be integrated to lift reach better precision and better welding effect.
4.All the cylinders are with safety valve. It can be automatically locked to avoid cylinder/ tank dropping even under situation of power off, high-pressure hose broken, burst.
5.The cylinder is with one high pressure hose to avoid oil leaking that usually happen by the traditional multiple hoses. Cylinder will return to initial condition by itself weight.
6.Stroke of Hydraulic cylinder is 1475mm, which can satisfy each annular shell with 2500 plate one-step lift. Greatly reduce the time waste.
7.Hydraulic cylinder basic height is 2050mm, which can match automatic girth welding machine to proceed internal girth seam welding.
8.Module configuration, the hydraulic jack quantity can be adjusted as per different size of tank and weight
9.High efficiency, each time lifting or falling down only needs around 15 minutes.
10.Can well cooperate with our tank welding machines, which can greatly reduce the manpower cost and reduce the construction time; Usually one Horizontal seam welding machine can match 6-10 skilled welder. Vertical seam welding machine can match around 20-30 people skilled welder and butt/fillet welding tractor can match 6-15 skilled welder.
At present, we have three types of hydraulic jacking system in WINCOO Engineering Co., LTD. They are the following three: Advanced hydraulic jacking system, Simple unfixing Holding -latch hydraulic Jacking system and Simple chain type hydraulic jacking system.
Storage tank jacking system is mainly used in large tank construction. WINCOO ENGINEERING CO.,LTD is supplying storage tank jacking system to tank contractors worldwide.
The pipe spool fabrication line has unique structure, high degree of automation, convenient operation, stable and reliable continuous production. The pipes produced by this pipe spool fabrication line have moderate rigidity, strength, good flexibility, creep resistance, environmental stress cracking resistance and good thermal welding performance, and have become the first choice for urban gas pipelines and outdoor water supply pipes. However, there are still some problems when using the pipe spool fabrication line.
Here is the content list:
l Failure of the production line and corresponding measures.
l Computer system failure and corresponding measures.
l Pipe spool fabrication line failure and corresponding measures.
l The outer surface of the pipe spool fabrication line is rough
① Adjust the pipe spool fabrication line of process temperature: reduce the cooling water temperature, the best cooling water temperature of the PE pipe is 20~25℃
② Check whether the waterway is blocked or the water pressure is insufficient;
③ Check whether the heating ring of the barrel, head, etc. is damaged;
④ Adjust the water flow of the sizing sleeve;
⑤ Please consult the raw material supplier for the raw material parameters of the batch;
⑥ Check the mold core temperature, if it is higher than the die temperature, reduce the mold core temperature;
⑦ Clean the mold;
l Grooves appear on the outer surface of the plastic pipe
① Adjust the water outlet pressure of the sizing sleeve, and balance the water output;
② Adjust the nozzle angle in the vacuum forming box to evenly cool the pipeline;
③ Check the mold, sizing sleeve, cutting machine and other hardware for debris and burrs;
l There is a jitter ring inside the pipe spool fabrication line
① Adjust the water outlet of the sizing sleeve to make it even.
② Adjust the vacuum degree of the second chamber so that the vacuum degree of the rear chamber is slightly higher than that of the front chamber;
③ Check whether the vacuum seal is too tight;
④ Check whether the tractor is shaking;
⑤ Check whether the host output is even;
l The outer diameter of the pipe spool fabrication line is out of tolerance
① Adjust the vacuum to change the size of the outer circle;
② Adjust the traction speed to change the outer ring size;
③ Correct the size of the inner hole of the sizing sleeve;
l Uneven wall thickness of pipe spool fabrication line
① Adjust the wall thickness of the mold; adjust the nozzle angle in the vacuum setting machine and spray box to uniformly cool the pipeline.
② Adjust the water outlet of the sizing sleeve to make it even.
③ Disassemble the mold, check whether the screws in the mold are loose, and then tighten it again;
Computer system failure
When the computer is turned on or running, pipe spool fabrication line is not allowed to enter the test state.
l Problem 1: The tensile strength and toughness are poor. The tensile strength curve of pipe spool fabrication line should have obvious yield strength and greater elongation, while poor plastic pipes are usually fragile, low elongation and easy to break.
l Problem 2: Poor impact resistance. According to the GB/T5836.1-92 standard, the drop hammer impact test was tested. After years of testing, it was found that the pass rate was only less than 50%, and many pipe spool fabrication line were even damaged by 10 times.
l Problem 3: The softening temperature is low and it is easy to deform after being heated. It is shown in the test performance, that is, the Vicat softening temperature is relatively low (less than 79). Some manufacturers only increase the amount of filler during the compounding process to increase the softening temperature.
This can indeed increase the softening temperature, but will greatly reduce the other properties of the pipe, especially impact resistance, tensile strength and toughness. Therefore, in order to increase the softening temperature without reducing or seldom reducing other properties, attention must be paid to the selection of additives, the ratio of raw materials, the production process and the production machinery, Can not be taken lightly.
Pipe spool fabrication line is tested in accordance with the national standard GB/T10002.1-1996, and its hydraulic inspection performance standard value requirements are relatively high, which puts forward high requirements for enterprises that produce pipe spool fabrication line. The eccentricity problem is one of the common plastic pipe problems, which will result in large uneven wall thickness of the produced plastic pipes, which not only causes waste of raw materials, but also makes it difficult for the water pressure test performance to meet the requirements.
The operation of the pipe spool fabrication line has a great impact. Therefore, this requires manufacturers not only to match the materials well, but also to install online testing equipment so that qualified companies can adjust the size deviation of the plastic pipe at any time.