Expedited! What does it mean to add PE behind the copper pipe?

…PE is polyethylene, and it should be high molecular weight PE used in pipes

There are more ABS pipes, but the cost is much higher, and PVC can also be used. Other plastics don't quite fit. Of course, you can use steel pipes, but it's not very good.

PE stands for portable executable. It is the executable file format of the Win32 environment itself. Some of its features are inherited from UNIX's COFF (Common Object File Format) file format.

portable executable"(Portable executable) means that this file format is cross-Win32 platform: even if Windows is running on a non-Intel CPU, any PE loader of the Win32 platform will be able to recognize and use the file format. Of course, there must be some changes to the PE executor ported to a different CPU.

All Win32 executables (except VXD and 16-bit DLLs) use the PE file format, including NT's kernel mode drivers. Therefore, studying the PE file format gives us a good opportunity to understand the structure of Windows.

It can be welded with PE-RT pipe fittings, or it can be connected with copper pipe fittings, but there will be hidden dangers after connection, and it is not recommended to bury it.

Passports cannot be distinguished from the number, only from the outer cover, and cannot be distinguished from the passport number.

The cover of the official passport is dark green, the cover of the ordinary passport for official purposes is dark brown, the cover of the ordinary passport for private purposes is reddish brown, and the cover of the diplomatic passport is red.

Extended Materials. China's passports are divided into three types: ordinary passports, diplomatic passports, and official passports.

1. Ordinary passports are divided into ordinary passports for business purposes and ordinary passports for private purposes.

2. Diplomatic passports are mainly issued to vice ministers, vice governors and other Chinese leaders, heads and deputy heads of important delegations of the party, government, and military, as well as diplomats, consuls, and their accompanying spouses, minor children, diplomatic couriers, etc.

3. Official passports are mainly issued to the staff of the first departments of China at all levels, the staff of the Chinese diplomatic missions, consular offices and the United Nations organization system and its relevant specialized agencies, as well as their accompanying spouses and minor children.

The passport of the People's Republic of China is a document issued by China** to Chinese citizens to prove their nationality and identity when entering and leaving the country (territory) and traveling or residing outside the country (territory). Passports of the People's Republic of China are divided into diplomatic passports, service passports, ordinary passports and SAR passports. Ordinary passports are further divided into ordinary passports for official purposes and ordinary passports for private purposes (referred to as "private passports").

HKSAR passports are divided into Hong Kong Special Administrative Region passports and Macao Special Administrative Region passports. Diplomatic, service and ordinary passports are collectively referred to as "official passports".

p refers to the People's Republic of China Ordinary Passport for Official Purposes!

g refers to the People's Republic of China for private ordinary passports!

d refers to the People's Republic of China Diplomatic Passport!

s refers to the People's Republic of China Official Passport!

Our Great China Passport is divided into diplomatic passport, official passport and ordinary passport.

Ordinary passports are further divided into ordinary passports for private purposes and ordinary passports for official purposes.

Ordinary passports for official purposes are issued to the leaders of local** and large state-owned enterprises.

Category P passports are ordinary passports for official purposes.

This kind of passport is generally kept by local ** or large state-owned enterprises, and cannot be kept by individuals.

Personal opinion, for reference.

It doesn't mean anything special, it's just a distinction between various passport categories. Chinese passports start with D for diplomatic passports, S starts with official passports, P starts with ordinary passports for official purposes, and G starts with ordinary passports.

Since January 1, 2007, China has abolished ordinary passports for official purposes, and has divided passports into three categories: ordinary passports, diplomatic passports and official passports. The types on the passport are as follows: p - ordinary private passport; w – diplomatic passport; g – Official passport.

Of course, the copper pipe is good, the heat conduction is fast, complete, and not easy to scale, but the joint is relatively difficult to handle. The main reason is that the cost is too high, the cost performance is not up, and it is not competitive.

There's no problem, it's just too expensive, and I heard that the Great Hall of the People uses this.

It is better not to replace it, because copper is easy to oxidize, which has a certain impact on the life of the home, or the current PE-RT material is better Personal advice.

However, we found that cross-linked polyethylene could not be hot-melted and the properties of the cross-linker were difficult to control, resulting in uneven pipe walls in production, so we went all the way to the PE-RT (high-temperature resistant polyethylene) geothermal pipes we are using now.

Copper pipes can be used, and it is already possible to install underfloor heating with copper pipes.

It is thermal insulation cotton, which will affect a little effect, and do not leave a large area of thermal insulation cotton outside. Otherwise, the effect will be poor.

Only the partial damage of the rubber and plastic insulation jacket does not affect the normal use of the air conditioner.

There is a layer of thermal insulation PE casing outside the connecting pipe of the internal and external units of the air conditioner, and the function of this layer of thermal insulation pipe is to insulate the copper pipe. After local damage, at most, the cooling capacity loss of the air conditioner will become larger, but it will not lead to abnormal use of the air conditioner.

It is recommended to find a similar PE to re-bandage the broken part.

The rupture of the copper pipe of the air conditioner indicates that the quality of the copper pipe is seriously unqualified, and the copper pipe will crack through when the surface is seriously broken, resulting in refrigerant leakage, which directly affects the use of air conditioning.

No, it won't. Unless the copper tube is oxidized.

Choose between PPR plastic pipe and copper pipe, copper pipe is good.

After the PPR pipe is used for a period of time, the inner wall of the pipe is seriously polluted twice, and bacteria are detected, including hot water, it is said that PPR will survive bacteria, not environmentally friendly, and the copper pipe will not, so the copper pipe is good.

Secondly, plastic pipes and copper pipes have their own advantages and disadvantages, plastic pipes are more organic, and copper pipes are more metals. Brass is an alloy of copper, zinc and lead, and solder is also used, and the commonly used solder is an alloy of lead and tin. These lead and tin metals are very harmful to the human body, especially to children's intelligence.

Like PPR and PVC pipes, the release of organic matter is a big hazard in providing food to bacteria, but if the tap water is properly disinfected in the waterworks, and the waterworks are not far from the taps, this is not a problem. A lot of microorganisms were detected in the test, and the important reason should be that the disinfectant can hardly survive in the hot water and decompose quickly, so the microorganisms grow wildly.

Although copper pipes are generally used for 50 or 60 years, if the local water source is not suitable, the pipes may burst in 1 year. And PPR under normal circumstances, 50 or 60 years of life is also a breeze. Be careful not to expose PPR to the sun.

Third, compare copper pipes and PPR, if you have enough money, the local water source is not particularly corrosive to copper, lead and other metals, and you can still find a good enough plumber to use copper pipes. There are too many technical problems in the installation of copper pipes, and the installation is not good, one of which is to bury hidden dangers for the corrosion and burst pipes soon in the future, and the other is to lead to the release of high heavy metals. Plastic pipes are cheap, easy to install, and have good safety performance, so they are also a good choice.

Finally, it is best to use aluminum-plastic composite pipes, which have good thermal insulation performance, and the inner and outer walls are not easy to corrode, because the inner walls are smooth, and the fluid resistance is very small; And because it can be bent at will, it is easy to install and construct. As a water supply pipeline, the aluminum-plastic composite pipe has sufficient strength, but if the transverse force is too large, it will affect the strength, so it is suitable for open pipe construction or buried in the wall, but not buried in the ground.

It is better to use PPR plastic pipes, and the plastic pipes do not rust. No odor.

The pipe wall is smooth. Tubes are elastic plastic tubes***.