The gas-electric vertical welding used by tank welding machine is a fully automatic control ascending system with a special flux-cored wire, and CO2 gas shielding for vertical butt welding to weld vertical or near-vertical welded joints.
What is tank welding machine?
How many kinds of tank welding machine?
What is the preheating method of tank welding machine?
Large storage tank automatic welding machine, large storage tank is used to store oil, natural gas, and other energy. This kind of tank because the body is too big, cannot be formed at a time, are made of steel plate, splicing. So the welding machine is needed in the splicing process. Manual welding is the simplest and most direct method, but because of its high cost and low welding speed. So automation equipment has been widely used. Large tank automatic welding equipment, we are also known as tank automatic welding machine, the following for you to introduce several commonly used automatic welding machine: horizontal welding machine, vertical welding machine and Angle flat welding machine.
The so-called horizontal welding machine is a kind of welding machine that welds steel plates horizontally in the storage tank prefabrication.
The so-called vertical welding machine is a kind of welding machine that welds steel plates vertically in the storage tank prefabrication.
The so-called Angle flat welder is a welder that welds the bottom plate and the corners in the storage tank prefabrication.
After the arc of the welding rod of the tank welding machine is started, the arc is slightly elongated. In the state that the arc is not extinguished, the end of the welding rod is melted and a few droplets fall down. At this time, the welding rod has reached the normal burning state. At the same time, the use of the tank welding machine The heat generated by the arc heats the weld start. If it is found that the surface of the spot-fixed weld at the start of the weld begins to show signs of melting, the electrode will press the arc towards the lower edge of the spot-fixed weld, and then weld upward; The electrode reduces the welding speed slightly and turns the arc upwards. At this time, the electrode pauses for a while, and the rear edge of the weld joint is broken down in advance, and a molten pool and a molten hole are formed, and the formed molten hole must ensure that the blunt edge of both sides is 1.0~1.5 mm. At this time, the seam has been connected, and the electrode can be welded normally.
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In any construction project involving the pipe spool fabrication line, the pipe spool fabrication line needs to be properly planned, planned and executed according to the design requirements. In order to maintain the integrity of the pipe spool fabrication line, ensure the normal operation of various projects and minimize accidents, it is necessary to ensure the highest quality of work in the pipeline manufacturing process. In this article, we will explore more details about pipe spool fabrication line.
Here is the content list:
l What is the pipe processing workshop of the pipe spool fabrication line?
l What are the pipe manufacturing specifications of the pipe spool fabrication line?
l What are the steps of pipe spool fabrication line?
The pipe spool fabrication line workshop is basically a workshop, and all pipe spool fabrication line are developed here. Generally, all pipe spool fabrication lines used for spool preparation are performed in the workshop using skilled pipe manufacturers.
In large-scale pipe manufacturing plants, pipe spool fabrication line is the best economical way to reduce on-site installation costs. The pipe manufacturing workshop provides all equipment, tools and manpower, and the quality of the pipe shaft is high.
The pipe spool fabrication line specification is an engineering document that provides all the guidelines that the reel manufacturer should follow. The pipe spool fabrication line provides the minimum requirements for preparing detailed workshop drawings and manufacturing, as well as the requirements for inspection and testing. It lists all applicable codes and standards.
The pipe manufacturing process of pipe spool fabrication line requires the assembly of pipes and pipe fittings according to the spool diagram. The pipe spool fabrication line manufacturer must consider the size of the components, because transportation may become a problem. In this case, sub-components are an effective way to transport large projects. Follow the steps below to complete the pipeline manufacturing:
l Marking and cutting:
According to the requirements of the design drawings, marking should be carried out and confirmed by the relevant supervisor before cutting. Pipe cutting is usually performed as follows:
① Carbon steel pipe-through gas cutting and grinding.
② Alloy steel pipe-cut by grinding or flammable.
③ Stainless steel tube-by grinding or plasma cutting.
Use dye imprinting, paint marking or marking to transfer the heat of the pipe to the cut piece before cutting the pipe spool fabrication line.
l Final preparation:
In the next step, final preparation (chamfering) and assembly are carried out in accordance with the approved specifications and WPS.
l Welded pipes:
Extra precautions must be taken to ensure that the longitudinal seams on the connecting pipe spool fabrication lines are not aligned in the butt weld. The spacing between the seams must be at least 100 mm apart, and branch connections should also be cleared. Take care to ensure that the longitudinal seams are not resting on the steel structure.
l Welded pipes and fittings:
The pipe spool fabrication line and fittings used for assembling are then placed on a temporary pipe bed and properly fixed and supported. Next, check the quality assembly of the device. After receiving the inspection gap, the joints will be welded by qualified welders.
l Detailed information marking:
Use metal paint marks to mark various detailed information near the joints: pipeline number, component heating number, joint number, assembly inspection signature, welder number, visual inspection signature and welding date. The spool number of the pipeline is marked with a paint mark, and an aluminum label is tied to the spool.
l Heat treatment:
According to the specific requirements of the project, preheating and PWHT will be carried out in the workshop or on-site.The pipe spool fabrication line is then transferred from the pipe workshop to the laying area.
Perform non-destructive inspection according to the requirements of project specifications or guidelines. After receiving the NDT permission, the spool will be released for installation/painting, with a release notice. Spools rejected in the NDT process are identified with yellow and black labels and sent for repair. NDT has tested the repaired welding area again as needed.
After painting, the quality control will be inspected on site and recorded in the prescribed format. After the paint inspection, loosen the spool for installation.
l Manufacture of stainless steel pipe:
The manufacture of pipe spool fabrication line is usually carried out in the workshop, and the isolation area is carbon steel and alloy steel. Equipment and tools used for CS manufacturing shall not be used for SS. SS tools must be distinguished by marking only "For Stainless Steel". For stainless steel materials, stainless steel tools will be used for grinding, brushing and clamping.
For protection and temporary storage until installation, all flange convex surfaces of the completed pipe section are equipped with plywood shutters, and the end of the valve core should be equipped with an appropriate cover.If you want to know more about high-quality tank welding machine products, you can also contact us at any time.
Rolling machine is a kind of equipment that uses working rollers to bend and shape sheet metal materials. It can shape parts with different shapes such as cylindrical parts and conical parts. It's very important processing equipment.
What are the precautions for using the rolling machine?
What are the structural characteristics of the rolling machine?
What cleaning measures are available for the rolling machine?
(1) Automatic center alignment.
Roll forming of the sheet metal is mainly completed by the rolling effect of the rolling machine. When the sheet is fed into the rolling machine, it must be ensured that the front edge of the sheet is parallel to the outer circumference of the roll, so that the rolled parts have high precision and high quality. The automatic center alignment process of the blade in the automatic feeding device is mainly completed by the servo motor driving the center alignment rod. Then the sliding device pushes the sheet to the feeding position of the rolling machine and waits for the sheet to be rolled.
Given the peculiarity of the plate shape, the vacuum suction receiving device is mainly used for plate transport. The plate rolling machine can roll plates of different sizes. Therefore, the position of the suction cups in the vacuum suction cup receiving device of the automatic feeding device must have a suitable adjustment function to be suitable for handling plates of different sizes.
(3) The speed and stability of the handling process.
In order to meet the working rhythm of the sheet metal bending machine and the safety of the handling process, the automatic feeding plate handling process should have better speed and stability to prevent overshooting and vibration during the handling process.
The automatic feeding device of the sheet bending machine is mainly composed of a sheet metal carriage, an actuator, a sheet metal transfer mechanism and an auxiliary mechanism. Sheet metal trolleys are used for storing sheet metal to be rolled. The main function of the actuator is to transport the sheet metal to be rolled up on the sheet metal trolley to the feeding platform. The transportation process of sheet metal is mainly applied to the Cartesian coordinate manipulator and vacuum suction cup receiving device. In industrial automation systems, it is often necessary to pick up and transport workpieces, and vacuum suction cups are widely used as vacuum manipulators.
1. Clean the components of the sheet metal rolling machine, especially the connection place;
2. When assembling the sheet metal rolling machine, the principle should be followed from the inside to the outside, first down and then up;
3. During assembly, the use of the same assembly tools or observe assembly work in the same orientation;
4. During the assembly process, the transmission should be carried out in strict accordance with the design drawings, and the dimensions and specifications should be strictly checked.
In order to give full play to the advantages of pipeline prefabrication equipment and overcome the limitations of fixed pipe spool fabrication line, we have developed a movable pipe spool fabrication line, which has been used in PetroChina, Sinopec, and China National Chemical Corporation. So, what are the precautions for the quality inspection of the pipe spool fabrication line?
Here is the content list:
l About the quality inspection content of the pipe spool fabrication line.
l The product parameter mark on the pipe spool fabrication line.
l How to inspect the pipe spool fabrication line?
The pipe spool fabrication line consists of a work station for pipe beveling, a work station for pipe mechanical assembly, a work station for automatic pipe welding, a steel structure work station frame that can be quickly disassembled, a trolley railing system and a light rail to form a transportation system.
The testing items of the pipe spool fabrication line include: density, melt mass flow rate, hydrostatic pressure, ring stiffness, flatness, ring flexibility, thermal stability, volatile content, moisture content, carbon black content, carbon black dispersion, Pigment dispersion, gas component resistance, rapid crack propagation resistance component analysis, component content detection, etc.
The comprehensive performance of pipe spool fabrication line will reach a high level in China:
1. In the detailed design, China's most advanced "Pipe Manufacturing Design System" software is used to realize the rapid drawing of the pipe spool fabrication line. After the IDF interface module is configured, the design data of the PDS and PDMS design institutes can be directly shared, so a "seamless combination" is realized between design and construction.
2. In the manufacturing management, the domestic first-class "pipe manufacturing and installation management system" software is used to realize all-round information management of the entire pipe spool fabrication line manufacturing process.
3. Pipe spool fabrication line groove adopts a reliable pipeline groove mobile workbench, two of which are used for pipe groove.
4. Roller bed type pipe plasma cutting and beveling machines have been used to cut pipes and form bevels in one step through thermal cutting and processing.
5. An efficient pipe cutting band saw machine and a fixed radial pipe end beveling machine are used to cut the pipe and machine the bevel according to the working procedure.
6. The unique mobile workstation for pipe mechanical assembly in China has been used for weld assembly to mechanically assemble pipe shaft welds.
7. Cover pipe welding adopts advanced automatic pipe welding movable workstation, pipe spool fabrication line automatic welding machine is used to realize efficient automatic cover pipe welding of pipe shaft.
8. The logistics transportation adopts the light rail transportation system, the station frame and the trolley railing system. The light rail transportation system is used for long-distance mechanical logistics transportation, and the station frame is used for transportation. The overhead railing system is used for container internal and external logistics transportation.
9. The pipe spool fabrication line project has a production capacity of 3000 inches/year and a day's production capacity of 1000 inches/day, which meets the huge engineering demand for prefabricated pipelines.
Pipe spool fabrication line has now been widely used in all aspects of people's lives, and unqualified pipes directly affect people's quality of life and health. At the beginning of 2014, some media exposed the problem of individual companies using recycled waste to produce drinking water distribution pipes and fittings, which had a bad social impact. So how to enter the site to inspect the pipe spool fabrication line?
The material, specification, model and quality of the pipe spool fabrication line and pipe fittings should meet the current national product standards and design requirements.The appearance quality of the pipe spool fabrication line should not only meet the requirements of its product standards, but also the following requirements:
l There are no defects on the surface such as cracks, shrinkage holes, slag inclusions, folding, heavy leather, and rust or dents that do not exceed the negative deviation of the wall thickness;
l The thread surface is intact without damage, and the flange sealing surface is flat, smooth, without burrs and radial grooves;
l The gasket has no aging deterioration or delamination phenomenon, and no defects such as wrinkles on the surface.
l Inspection quantity: all inspections. Check the factory inspection report and certificate.
l Inspection method: observe and inspect.
l The size, wall thickness and allowable deviation of the pipe spool fabrication line should meet its product standards and design requirements.
l Inspection Quantity: 20% of the products of each specification and model are randomly checked by the number of pieces, and no less than 1 piece
l Inspection method: measure with steel ruler and vernier caliper.
For the pipe spool fabrication line belonging to one of the following conditions, sampling shall be conducted by the supervision engineer, and the inspection and re-inspection shall be carried out by a qualified inspection unit. The re-inspection results shall meet the current national product standards and design requirements.