Is it not available for fire PE pipe electric rong welded pipe to be welded for 220 seconds only to

This is not possible, the main reason is that their power is completely different, there is a lot of difference in this aspect, so there will definitely be problems with this use.

If the fire PE pipe capacitor is welded for 220 seconds, and it is only welded to 178 seconds, this should not be used, because it has a natural provision to take over for 220 seconds, and if it is less than this time period, this must not be used.

As we all know, there are two common methods for connecting PE water supply pipes, hot melt connection and electric fusion connection, how to connect electric fusion pipe fittings First put the electric fusion pipe fittings on the pipe, and then use a special welding machine to electrify the electric fusion pipe fittings according to the specified parameters (time, voltage, etc.), so that the inner surface of the electric fusion pipe fittings embedded in the electric wire and the outer surface of the pipe insertion end are melted How to install the electric fusion pipe fittings? After cooling, the tubes and fittings are fused together. Here Runshuo Pipe Industry will sort out a list of how to connect electrofusion pipe fittings --- the methods and steps of the procedure for electrofusion socket connection:

Cut the tube. The connecting end of the pipe needs to be cut vertically to ensure that there is enough hot melt zone. Commonly used cutting tools include rotary cutters, saw bows, plastic pipe scissors, etc.; High temperature is not allowed to be generated during cutting, so as not to cause high temperature deformation.

Measure and mark the depth of the pipe fitting or the welding area (such as saddle pipe fitting) on the pipe with a marker, pay attention to the pipe end face should be cut off perpendicular to the axis, and the welding should be carried out after the cleaning agent is completely volatilized, and the depth of the pipe fitting should be re-identified after the pipe welding area is cleaned. If the end face of the pipe is not cut perpendicular to the shaft, part of the welded area will be exposed, which will cause welding errors such as molten material flowing into the pipe.

Clean the fitting area and mark the insertion depth line.

Use fine sandpaper, scraper, etc. to scrape off the oxide layer on the surface of the pipe electrofusion pipe fitting manufacturer, use a clean cotton cloth to wipe off the dirt on the connection surface of the pipe and pipe fittings, and mark the insertion depth line. After a period of storage, polyethylene pipes will form an oxide layer on the surface. The oxide layer in the welding area must be completely removed before welding, otherwise the welding quality will be affected and potential safety hazards will be caused.

If the electrofusion pipe fittings installed under stress-free conditions can be rotated by hand, if they are not accurately installed under stress-free conditions, there will be accidents such as melt spilling over the end face of the pipe fittings or overflowing into the pipeline during welding. Pay attention to remove the edges and corners and residual chips on the inner and outer surfaces of the pipe, the welding surface of the pipe and the pipe fittings must be absolutely clean, dry and grease-free, after scraping off the oxide layer, it can be cleaned with a special cleaning agent for polyethylene or more than 96% alcohol and chipless colorless paper before installation.

The fitting is inserted into the pipe.

If you buy the fire leather art pipe electrofusion welding pipe in 220 seconds to 178, this cannot be used, because there may be some system failures in the middle of life.

Can PE pipe electrofusion welded pipe for 220 seconds, see 178 seconds? Totally usable.

Under normal circumstances, if the PE capacitor welded pipe for fire protection is shorter than the original by more than 50 seconds, it can also be used, but the leakage must be suppressed.

Of course, this is not possible. Because he's not necessarily 220 seconds, you should be compliant.

Small class PE pipe welding pipe 220 seconds only changed 178 seconds can be used in this case also depends on the quality of the welding, can not pass the anti-Japanese time, because your welding level is high and 178 seconds yes bitter death can be used, if you, and the level of Korean dramas, generally, you uh calculated 178 seconds, it must not be used.

Yes, there is a certain amount of pressure required for this.

In this case, this is not possible, the main reason is that their power is completely different, and there will be big problems in this regard.

After graduating from the private room, the electrofusion welding pipe was only welded to 178 seconds in 220 seconds, is it okay? I don't think so.

Generally, if this kind of pipe is welded, it should be usable.

Under normal circumstances, it should be welded according to the requirements, so as to ensure the quality.

The selection of the material of the outdoor fire water transmission and distribution pipeline should be determined by comprehensive analysis of technology, economy and safety according to the pipe diameter, internal pressure, external load and the topography, geology and pipe material of the pipeline laying area, in accordance with the principles of operation safety, durability, leakage reduction, convenient construction and maintenance, and economic reasonableness. At present, the pipes of domestic fire outdoor water pipelines are generally made of steel pipes, ductile iron pipes, PE water supply pipes and galvanized pipes.

Outdoor fire hydrant water supply system (anti-rust and anti-corrosion measures should be improved in the ground).

1) When the outdoor fire fighting is a living and fire fighting pipeline system or a low-pressure fire water supply system, you can choose to use ductile iron pipes (slide-in type, mechanical type) with low allowable pressure to plug straight pipes, welded steel pipes, hot-dip galvanized welded steel pipes on the inner and outer walls, etc. (PE water supply pipes can be tried for some projects).

2) When the outdoor fire water supply system is a temporary high-pressure water supply system and an atmospheric high-pressure water supply system, when the working pressure of the system is low, the same pipe can be used within the allowable pressure range of the pipe; When the working pressure of the system is large, flanged ductile iron pipes, welded steel pipes, internal and external hot-dip galvanized ordinary or thickened welded steel pipes and seamless steel pipes should be used according to the working pressure of the system.

3) In recent years, polyethylene (PE) pipelines have been widely used in municipal water supply, agricultural and forestry irrigation, sewage and fire pipeline projects due to their superior performance characteristics. When the working pressure of the fire water supply system is not greater than, the buried pipeline part needs to adopt the PE water supply pipe above the nominal pressure, but when the system working pressure is greater, it is advisable to use seamless steel pipe.

The underground buried pipeline needs to use PE pipe with steel wire or ductile iron pipe, that is, steel wire skeleton pipe, and the aboveground part cannot be used.

1.Pipe-to-but.

Fix the pipes and pieces to be welded on the butt machine, and use the fixture according to the size of the pipe. Use a brush and cotton cloth to remove the oxide layer, oil and dust from the nozzle.

The connecting ends of the two parts to be connected should extend out of the welding machine fixture for a certain free length, and straighten the two corresponding parts to be connected so that they are on the same axis. The misalignment should not be greater than 10% of the wall thickness.

The end face is planed with a milling cutter to make the butt end face smooth, flat, clean and vertical. Note: The cutter should be started first, then the feed handwheel should be slowly turned, and the cutter disc should be removed when there is a continuous cut. The two butts are straightened by adjusting the tension of the clamp (turning the pipe if necessary).

2.Endothermic phase.

The heating plate will automatically heat up to the green indicator light or reach the set temperature, close the pipes and fittings to be welded to heat the end face, and the feeding handwheel will stop feeding when the two end faces are pressurized to the corresponding flanging to maintain the heat-absorbing state. Separate the pipes and fittings from the heating plate, and then close the two heated end faces and dock, (see Table 2 for the heat absorption time) the two nozzles after heating are melted, and the heat absorption process is completed when heated to the molten state. When the ambient temperature is 20, the heating time is specified at 10 thick (mm) seconds, and the flat and convex height of the welding surface is required to reach the required value.

Note: At this stage, it is sufficient to meet the specified requirements of the flange, and it is sufficient to maintain the pressure for endothermy. Don't keep increasing the pressure!

3.Remove the heating level platen.

When the endothermic process is completed, the electric heating plate is removed and the pressure is quickly started (see Table 2 for the docking pressure), and the operation is skillfully completed within 10 seconds: especially when the ambient temperature is low, it is shortened as much as possible, and the end face is cooled very quickly, and the docking speed is slow, which directly affects the quality of welding.

4.Cooling connector.

After the interface is completed, the counterpart should be stabilized on the fixture to let it cool naturally, and the cooling time is shown in Table 2 before it is put on the ground and must be cooled again before the other end of the counterpart is aligned and the hot interface can be fused. After opening the fixture, remove the fixture to check the appearance of the melt joint, and the height and width of the hot melt hoop should be uniform and beautiful, and its height and width should be appropriate.

Fire pipes are mainly divided into indoor and outdoor two, because plastic pipes will deform at high temperatures, so PE fire pipes.

At present, the PE pipe for fire protection is mainly used in outdoor fire pipes, and the selection of PE pipes is determined according to the length and pressure of the pipeline in the engineering design. Most of the outdoor fire water supply and life and production of the project, buried pipelines can be completely PE pipes, good hydraulic conditions, no need to prevent corrosion and cold, but outdoor fire hydrant connection branch pipe should be metal pipe, PE pipe and metal pipe connection is best to use steel-plastic conversion joint.

Fire protection requires the use of steel pipes, and plastic pipes are definitely not allowed.

No, you must use seamless steel pipes, because fire pipes are pressurized, and PE pipes cannot withstand so much pressure.

For the welding of PE pipes, the butt weld of PE pipes, this method provides the highest reliability and diameter within the range and pressure process: the end of the heated pipe is defined using a tool called contact pressure and temperature"Mirroring"。The ends are quickly touched and kept under pressure during cooling.

When the working pressure of the system is not greater than that of the buried pipeline, it is advisable to use ductile iron pipe or steel wire mesh skeleton plastic composite pipe water supply pipe; When the working pressure of the system is greater than less than , it is advisable to use steel mesh skeleton plastic composite pipes, thickened steel pipes and seamless steel pipes; When the working pressure of the system is greater than , it is advisable to use seamless steel pipe.

When the grooved connector is used, the working pressure of the grooved pipe joint system with a nominal diameter less than or equal to DN250 should not be greater than , and the working pressure of the grooved pipe joint system with a nominal diameter greater than or equal to DN300 should not be greater than .

PE pipes are OK, UPVC has not been used. This has nothing to do with whether there is a pump or not, it can be connected through flange conversion.

The outdoor ring network of my current construction site is PE pipe, and the indoor galvanized pipe is used.

If there is no water pump, it can be connected, but the water pump adapter cannot be installed on PE, and there must be a check valve between PE and zinc pipe.

Generally, ductile iron pipes and galvanized steel pipes are used! To consider the water hammer effect, do not use PVC pipes!

No, it is necessary to use seamless steel pipes.

This requires a plumber certificate, which is generally an intermediate or above plumber certificate.

Too little information is provided, and the reasons are complex and difficult to judge. It is necessary to determine the cause of cracking based on the crack.

Steel-plastic pipes and PE pipes are not the only ones.

The stool flange is welded on it.

I don't know how to connect.

Flange connection, PE material has a special flange, ask the manufacturer to know.