The installation of pipeline construction equipment is one of the necessary parts in the pipe construction solution, and the installation and construction of pipeline construction equipment is a very important stage in project construction. Due to various factors in the project construction, there are many problems in the installation of pipeline construction equipment. To promote the improvement of the quality of industrial pipeline installation, certain measures need to be taken to control the installation quality of pipeline construction equipment to ensure the smooth construction of the project.
Here is the content list:
l Regarding the quality inspection of pipeline construction equipment installation.
l What are the quality control measures in the installation of pipeline construction equipment?
l Regarding the quality control of pipeline construction equipment after construction.
The sequence of installation of pipeline construction equipment is:
Measuring arrangement→cleaning the construction work area; construction road→conveying anticorrosion pipe→processing tank→distributing pipe→preparing nozzle; pipeline assembly→pipe assembly and welding→welding joint inspection→heat shrinkable casing (tape) bushing→ trench excavation →Appearance repair .
After the installation of pipeline construction equipment is completed, quality inspection is required. After pipeline construction equipment is installed and put into use, regular monitoring is required. Generally, radiographic inspection is used to inspect the quality of pipeline installation. This monitoring has a very good effect on the internal inspection of welded joints. It is widely used in the field of construction equipment installation. This method can also be used to make the quality of the pipeline meet the assessment standard.
Before installing pipeline construction equipment, clarify the construction plan of the construction technicians, use GB/T as the standard, and carry out construction in accordance with national standards and specifications; during the installation of pipeline construction equipment, strictly review the drawings for defects to ensure the rationality of the drawings, and the construction unit It is also necessary to make preparations for pipeline installation and construction, pipeline lumber, welding inspection, construction site management, etc.
Strictly follow the relevant requirements of pipeline construction equipment and pipeline construction requirements to improve the quality of construction. In order to ensure the quality of pipeline installation, quality control is required for key parts such as welding materials, welding processes, and welding seams to ensure pipeline construction equipment. Welding consumables, brands, specifications, etc. are required by the plan design, which are consistent with the project construction requirements to ensure the quality of installation.
① After the pipes, accessories and raw materials used for pipeline construction equipment enter the construction site, the supervisors shall check and accept them on site, and store the materials after passing the acceptance.
② Pipe joints and semi-finished products of pipeline construction equipment should be guaranteed not to be damaged during transportation and storage. When unloading, handle with care and not collide with each other; choose a flat place for stacking pipe joints.
③ The storage temperature of the rubber ring of pipeline construction equipment is between -5 and 30 degrees Celsius. It should not be exposed to ultraviolet light source and keep away from the heat source; the rubber ring and the items that easily affect the rubber ring should not be put together. If the pipeline construction equipment is being constructed In winter, hard rubber rings are not allowed.
④ For trench excavation in open-cut pipeline engineering, the section should meet the design requirements of construction quality, the original soil at the bottom of the trench should not be damaged, and the mechanical excavation should reserve a 200-300mm soil layer for manual excavation and leveling, and the bottom of the trench can be soaked by water And frost damage, if there is gravel soil, lime soil to backfill, the trench wall should be leveled to meet the requirements of construction design.
⑤ For concrete construction, when the pipe seat and flat foundation are poured in layers, the flat foundation should be shaved and rinsed; the concrete should be prevented from segregation, and the concrete should be cured after pouring.
⑥ When pipeline construction equipment is installed, visual inspection and internal cleanliness of the pipeline must be inspected.
⑦ The flexibility of pipe joints must meet the design requirements, and the rigidity must also meet the requirements.
⑧ In the stage of backfilling, the backfill height between both sides of the pipe and the top of the pipe before the hydraulic test of the pressure pipeline is greater than 0.5M, and the pressure-free pipeline shall be backfilled after the closed water test and the closed gas test have reached the standard.
After the completion of the pipeline construction equipment, the finishing work will begin. The unit needs to organize personnel to review the material documents involved in the pipeline installation, project reports, etc.; after the completion of the project, debugging and quality appraisal are required, and the pipeline professionals are organized to conduct quality appraisal of the installed pipelines. The dynamic control of the links will protect the completed pipelines.
In the later stage of the installation of pipeline construction equipment, in order to ensure the smooth completion of the project, the quality of the pipeline needs to be tested again to ensure that the pipeline installation does not have problems such as tilt and cracks, the welding parts are of good quality, and the pipeline is unobstructed. In the later period after the completion of the project, it is necessary to sort out each project data and work files involved in the pipeline construction, do a good job of archiving and backup to evaluate the quality of the pipeline, do a good job in risk control, and carry out the acceptance of pipeline construction equipment.
There are many influencing factors in the installation of pipeline construction equipmentt, so reasonable measures need to be taken to monitor and control every aspect of pipeline construction equipment. With the continuous expansion of the pipeline construction equipment construction industry, the use area is also expanding. Due to the importance of pipeline use, it is necessary to control the pipeline installation quality to ensure that the installation quality reaches the ideal standard!
What is more? WINCOO provide not only pipeline construction solutions, but also pipe spool fabrication solutions for customers from everywhere!
What are the precautions for using the tank hydraulic jacking system?
The role of the tank hydraulic jacking system is to increase the force by changing the pressure. The main function of the tank hydraulic jacking system is to transmit power and movement. Next, the precautions of the tank hydraulic jacking system will be explained in detail.
Here is the content list:
l Common problems when using tank hydraulic jacking system.
l Combining the above problems, talk about the measures to control the leakage of tank hydraulic jacking system.
l Matters needing attention when using tank hydraulic jacking system.
Common problems when using tank hydraulic jacking system.
Reasons for leakage of tank hydraulic jacking system.
(1) Caused by defects in design and manufacturing
(2) Impact and vibration cause loose pipe joints
(3) Mutual wear of dynamic seals and matching parts (especially hydraulic cylinders)
(4) The oil temperature is too high and the rubber seal is incompatible with the hydraulic oil and deteriorated.
Combining the above problems, talk about the measures to control the leakage of tank hydraulic jacking system.
l Solution 1: Design and manufacturing defect solutions
The selection of external components of tank hydraulic jacking system often plays a decisive role in the leakage of hydraulic system. This determines that in the improvement of tank hydraulic jacking system, our technicians should carefully choose the cylinders, pumps, valves, seals, hydraulic accessories, etc. based on the principle of choosing the best among the best and choosing the cheap.
① Reasonably design the mounting surface and sealing surface of the tank hydraulic jacking system. When the valve block or pipeline is fixed on the mounting surface, in order to obtain a satisfactory initial seal and prevent the seal from being pushed out of the groove and being worn.
② The installation surface of the tank hydraulic jacking system should be straight and the sealing surface should be finished. The surface roughness should reach 0.8μm and the flatness should reach 0.01/100mm. The surface must not have radial scratches, and the pre-tightening force of the connecting screw must be large enough to prevent surface separation.
③ During the manufacturing and transportation of tank hydraulic jacking system, it is necessary to prevent the key surface from bumping and scratching. At the same time, the assembly and debugging process must be strictly monitored to ensure the quality of assembly.
④ Do not be taken lightly about the leakage of some tank hydraulic jacking system, and must be eliminated.
l Option 2: Reduce shock and vibration
In order to reduce the leakage of tank hydraulic jacking system caused by the loosening of pipe joints subjected to shock and vibration, the following measures can be taken:
① Use shock-absorbing brackets to fix all pipes to absorb shock and vibration;
② Use low-impact valve or accumulator to reduce the impact;
③ Properly arrange pressure control valves to protect all components of the tank hydraulic jacking system;
④ Minimize the number of pipe joints used, and try to use welding to connect pipe joints;
⑤ Use straight threaded joints, tee joints and elbows instead of tapered pipe threaded joints;
⑥ Try to replace each piping with oil return block;
⑦ For the highest pressure used by the tank hydraulic jacking system, specify the bolt torque and plug torque during installation to prevent the joint surface and seal from being eaten away;
⑧ Install the pipe joints of the tank hydraulic jacking system correctly.
l Option 3: Reduce the wear of dynamic seals
Most of the dynamic seals have been precisely designed. If the dynamic seals are qualified, installed correctly, and used reasonably, they can guarantee a long-term relatively leak-free work. From the perspective of tank hydraulic jacking system design, designers can take the following measures to extend the life of dynamic seals:
① Eliminate the side load on the piston rod and drive shaft seal;
② Use dust ring, protective cover and rubber sleeve to protect the piston rod to prevent abrasives, dust and other impurities from entering;
③ Design and select a suitable filter device and a fuel tank that is easy to clean to prevent dust from accumulating in the oil;
④ Keep the speed of the piston rod and shaft as low as possible.
Matters needing attention when using tank hydraulic jacking system.
First of all, the requirements for static seals,tank hydraulic jacking system static seals prevent oil leakage between rigid fixed surfaces. Reasonably design the size and tolerance of the seal groove, so that the installed seal will be deformed to a certain extrusion so as to fill the microscopic depression of the mating surface and increase the internal stress of the seal to be higher than the pressure to be sealed.
It should be noted that when the rigidity of the part or the pre-tightening force of the bolt is not large enough, the mating surface will separate under the action of the oil pressure, causing a gap or increasing the gap that may exist from the beginning because the sealing surface is not flat enough. As the mating surface moves, the static seal becomes a dynamic seal. Rough mating surfaces will wear the seal, and the fluctuating gap will eat away at the edge of the seal.
In addition, control the oil temperature to prevent deterioration of the seal. Premature deterioration of the seal may be caused by many factors. An important factor is the high oil temperature. Each time the temperature rises by 10°C, the seal life will be halved. Therefore, a reasonable design of an efficient tank hydraulic jacking system or a forced cooling device should be provided to keep the optimal oil temperature below 65°C.
Among them, engineering machinery of tank hydraulic jacking system must not exceed 80°C, and hydraulic oil and seal types and materials should be selected according to the operating instructions or relevant manuals to solve compatibility problems and extend the service life of seals.
1. Adjust the operating vehicle
According to the width of the steel plate, adjust the height of the operating vehicle, so that the distance between the bottom edge of the wheel and the upper surface of the tray can reach the width of the steel plate. At this time, the upper limit of the tray is adjusted in the middle position, and the beam of the tray can also be adjusted accordingly in the construction according to the situation.After adjusting the operation car, be sure to insert the puncture pin of the column and tighten the screws to ensure the smooth operation of the car during walking
2. Power access
Make sure there is no short circuit in the operation car, place the welding power switch in the correct position of automatic welding, turn on the power, and close the main switch of the welding power supply.And test and debug the system is normal operation.
3. Clean the groove
The Angle grinder is used to clean up the oil and rust in the groove, remove burrs, splashes and solder spots on the groove surface. The lower vertical joints of the steel plate are ground to 100mm, and the contact points between the upper vertical joints and the transverse joints are handled well to make the bottom of the groove smooth and smooth, so as not to hinder the movement of the pallet along the steel plate.
4. Install the welding wire
Put the wire into the wire tray for fastening, and then cut off part of the bundled string.
A hose should be added between the welding wire plate and the welding gun to avoid electric leakage between the welding wire and the body.The pressing force of the straightening wheel should be small to avoid bending of the welding wire caused by excessive pressure.After the welding wire is inserted into the gun barrel, close the wire feeding pressing wheel and press the "wire feeding" button to send the welding wire out of the conductive nozzle for a length. At this time, all the binding ropes are cut open.The pressing degree of the pressing wheel should be appropriate. If it is too loose, it will cause the wire to slip. If it is too tight, it will cause the wire indentation to be too large, and the resistance will increase, leading to the instability of the welding arc.When the conductive tip is worn too much, it must be replaced in time, otherwise the conduction is not reliable, and it is easy to cause the welding arc instability.
5. Filling flux
The flux shall be dried with a special drying box, and the heating temperature shall be as per the requirements of the flux. After heating, the flux shall be kept warm to about 50℃.When the flux temperature is too high, it can not be loaded into the flux box, so as not to burn the flux pipe.Pay attention to clean the dust on the filter cover in the flux box to ensure the suction of recovery.
6. Adjust the torch
Adjust the position and Angle of the welding torch so that it is in the center of the supporting belt.Operator requires that the stretching length of the wire is 20-30mm, that is, the distance between the conductive tip of the welding gun and the steel plate. The Angle of the welding gun is generally about 25 degrees.
7. Adjust the flux transport and recovery system
Adjust and operate the roof wheel, so that the tray is separated from the steel plate. Adjust the supporting belt on the tray to about 15-20mm below the groove, and then remove the roof wheel from the steel plate, so that the supporting belt contacts the tank wall, and test the operation for about 1M to check whether it is in normal operation.Adjust the relative position of the conveying port and the welding gun to ensure that the welding flux can fully protect the welding point;Adjust the position of the recovery port to ensure that all unreacted flux can be recovered to the flux tray.
8. Check whether the welding power switch is correct, whether the ground wire contacts and conducts well, check whether the switch behind the operation box is in the "automatic" position, and close the welding power switch.
9. Adjust the wire does not contact the steel plate, open the wire feed pressing wheel, press the "start" button of welding, at this time the voltmeter is displayed, adjust the voltage to 35V, and adjust the current to make the wire feed wheel speed is appropriate, press the "stop" button.(This work is mainly to ensure that the arc is easy to start after welding, the welding current and arc voltage are stable and the arc is normal.)
The whole pipeline project is divided into solution of container pipe spool fabrication line, on-site prefabrication and on-site installation. Among them, the Solution of container pipe spool fabrication line is the first step of pipeline engineering, and its importance is self-evident.
What are the specific principles of the solution of container pipe spool fabrication line?
What is the definition of solution of container pipe spool fabrication line?
What are the precautions for the production of solution of container pipe spool fabrication line?
The main purpose of the solution of container pipe spool fabrication line is to reduce the amount of installation on site so as to improve the efficiency of supply and installation and improve the construction quality of the pipeline. The general principles are as follows:
1. Pipes made of special materials, such as Hastelloy, titanium and other precious metal materials, have high requirements for installation quality, especially for the installation environment and surface anti-pollution requirements of pipelines. It is difficult to meet the requirements.
2. Pipes between combined equipment, such as compressor unit system pipelines, are generally prefabricated in the factory by equipment manufacturers according to equipment positioning due to the high internal cleaning requirements of such pipelines.
3. Pipe sections with special structures, such as jacketed pipes with strict requirements and pipes with special structures inside the pipes, can be prefabricated by manufacturers with mechanical processing due to on-site prefabrication and limited processing capacity.
4. Pipes with lining, such as carbon steel lined PTFE pipes, these pipes will generally be prefabricated and lined directly by manufacturers with lining capabilities entrusted by the owner according to the design drawings, and a certain adjustment pipe section is reserved. Prefabricated and installed on site.
Definition of solution of container pipe spool fabrication line: The discharge and sectional design of the pipeline of the piping system, in the factory (workshop), after pipe bending, pipe fitting fabrication, beveling, welding, heat treatment, inspection, marking, cleaning, painting And protection and other processes, the process of manufacturing pipeline products. Among them, we can understand that the depth in the solution of container pipe spool fabrication line represents the ratio of the number of welding and inspection completed in the prefabrication plant to the total number of welding in the project, that is, the ratio of the number of prefabricated welds to the total number of welds, for reference!
solution of container pipe spool fabrication line is to connect the pipes in the workshop when the construction is not good or the weather is bad, and then lay them directly on the site. This can speed up the progress of the project. Prefabrication should pay attention to details such as size and angle. There is the safety issue of large prefabs in transit.
Wincoo Engineering Co., Ltd (WINCOO) is engaged in bringing the most suitable solutions/equipment for clients, fabricators, EPC/C companies on pipe fabrication, tank construction, pipeline construction, industrial production lines, clean energy project and other industrial fields.