PE pipes have good flexibility and weldability, making them more convenient, economical and safer. The PE pipe is laid at a high speed, and the damage cost and maintenance cost are low. As long as the joint is good, the axial load can be withstood without leakage and disengagement. Therefore, it is not necessary to carry out anchor points and joints at the joints and bends during laying, and the cost can be reduced. PE pipes have unique flexibility, their elongation at break exceeds 500%, the bending radius can reach 20 to 25 times the diameter of the pipe, and the excellent scratch resistance. Therefore, it is easy to move, bend and intersperse when laying, and is suitable for various construction methods such as non-excavation pipe jacking. Moreover, the pe tube has strong adaptability to the pipeline foundation, on the one hand, the requirement for the pipe base is lowered, and on the other hand, the pipe base changes after being laid, and is not easily damaged.
First, PE pipe features
1, long service life; under normal circumstances, PE pipe can be safely used for more than 50 years.
2, good hygienic performance; PE pipe does not add heavy metal salt stabilizer, the material is non-toxic, non-fouling, no bacteria. Avoid secondary pollution of drinking water.
3, excellent corrosion resistance; PE is an inert material, in addition to a few strong oxidants, can withstand the erosion of a variety of chemical media.
4, high toughness; PE tube elongation at break generally exceeds 500%, high strength and resistance to distortion, the ability to adapt to uneven settlement of the pipe base is very strong, and the seismic performance is excellent.
5, strong resistance to crack slow and rapid growth; low friction coefficient, small flow resistance, significantly higher than the same diameter of other pipes. Excellent wear resistance, 4 times the wear resistance under the same conditions.
6, good weldability, the interface strength is higher than the pipe itself. Excellent flexibility and scratch resistance. The system cost is low, which can greatly reduce the engineering cost.
Due to its superior resistance to friction and resistance to various chemical properties, PE pipes have been widely used in gas and water supply and distribution networks in many major cities around the world. PE pipes are also widely used in the mining industry to transport pulp. And industries such as chemicals, communications, agriculture, irrigation and air conditioning. Another growing market segment is the drainage system, especially where chemicals are available and where UPVC is not suitable.
Second, PE pipeline installation procedures
1. Hot-melt socket installation, DN20-DN63mm specification generally adopts this method, the specific process is as follows:
(1) Using a pipe cutter to cut the pipe according to the installation requirements;
(2) Marking number at the depth of the pipe to be inserted;
(3) warming the hot melt machine die to about 20;
(4) Simultaneously heating the pipe and pipe fittings, and then inserting them (tossing them in a moment after being inserted into the position, and prohibiting twisting during heating, socketing, and cooling;
(5) natural cooling;
(6) After the completion of the construction, it is put into use after being tested and accepted;
2, hot-melt butt installation, DN110-DN1600mm specifications generally use this method, the specific operation process is as follows:
(1) Place the two PE pipes to be installed and connected on the fuser clamp at the same time (the fixture can replace the clamps according to the size of the pipe to be installed), each
The other end of the root pipe is lifted to the same level with a pipe bracket.
(2) Flatten the pipe section with an electric milling cutter to ensure that the contact surfaces of the two pipes are fully matched;
(3) Raise the electric heating plate to 210 degrees, place the end faces of the two pipes, and operate the electro-hydraulic device so that the end faces of the two pipes are completely heated in contact with the electric heating plate at the same time;
(4) Extracting the heating plate and operating the hydraulic device again to fully abut the end faces of the molten two pipes and lock the hydraulic device (to prevent bounce);
(5) Keep a certain cooling time loose, and the operation is completed;
(6) After the completion of the construction, it must be tested and accepted before it can be returned to the soil for use;
(7) The pipe should be well protected against wind during the heating process. During the cooling process, it should be gradually passed, and it should not be cooled rapidly.
Proper clamping is critical to efficiency. This is especially true for metallographic cutting of large workpieces.
If the clamping tool used is not appropriate, the time required to clamp large workpiece will be greatly increased, affecting the subsequent cutting process, the loss is not worth the gain. Worse, large artifacts are more likely to move if they are not clamped. This means extra holding time for cutting or, worse, damage to the sample.
Solution: Use a better or customized gripper tool
If you work with large artifacts frequently, make sure you have a good range of gripper tools to choose from, because having the right tools on hand can save a lot of time.
If you often work with similar-shaped artifacts, custom clamping tools are by far the most efficient choice. Custom clamping tools not only save you time, but also ensure consistency between the sample and the cutting wheel, reducing the risk of cutting wheel deflection, thus ensuring an easily reproducible process.
Cutting Clamp,Saw Straight Edge Clamp,Saw Guide Clamp,Universal Miter Saw Clamp
TROJAN (Suzhou) Technology Co., Ltd. , https://www.trojanmaterial.com