HDPE Water Pipe Specification in Malaysia

HDPE water pipe with a blue strip stretched over the pipe is distinct from other pipes.HDPE water pipes are very suitable for the transfer of liquids containing abrasive particles due to their polymer properties and are produced and supplied in different sizes and pressures. A few days ago, a customer in Malaysia inquired about the parameters and installation and construction technology of HDPE water pipes. Our factory is specialized in the production of HDPE water pipes. HDPE water pipes have many different parameters. In order to let customers understand in more detail and clearly, I put the regular parameter table of HDPE water pipes below, which is convenient for customers to refer to. If you need HDPE water pipes for the specific price, please contact us or leave us a message.

Advantages of HDPE water supply pipe in application

High-density polyethylene water supply pipe is formed by extruding high-quality polyethylene resin as the main raw material, adding necessary antioxidants, ultraviolet absorbers and other additives, and it has the following advantages.

(1) Good hygienic performance: No heavy metal salt stabilizer is added during PE pipe processing, the material is non-toxic, has no scaling layer, and does not breed bacteria, which solves the secondary pollution problem of urban drinking water well.

(2) Corrosion resistance and long service life: PE pipes can withstand the erosion of various chemical media without anti-corrosion treatment. Under rated temperature and pressure conditions, they can be used safely for more than 50 years.

(3) Small water flow resistance: PE pipe has a smooth inner surface, which has a higher conveying capacity than traditional pipes, and also reduces the pressure loss of the pipeline and the energy consumption of water transportation.

(4) Good toughness and flexibility: PE pipe is a high-toughness pipe with an elongation at break of more than 500%. It has a very strong adaptability to uneven settlement and dislocation of the foundation, and has good shock resistance. In addition, the flexibility of the PE pipe makes it easy to bend, and it can bypass obstacles within the allowable bending radius of the pipe during construction, reducing construction difficulty and installation costs.

(5) Reliable connection performance: PE pipe hot-melt or electro-fusion connection essentially guarantees the consistency of the interface material structure and the pipe body itself, realizes the integration of the joint and the pipe, and can effectively resist the ring direction caused by internal pressure. stress and axial stress. Therefore, compared with rubber ring joints or other mechanical joints, there is no risk of leakage caused by joint distortion, and the sealing performance is very good.

(6) Good low-temperature impact resistance: The low-temperature embrittlement temperature of polyethylene is extremely low, and it can be used safely in the temperature range of -20-40°C. During construction in winter, there will be no brittle cracking of the pipe.

(7) A variety of new construction methods: HDPE pipelines have a variety of construction technologies. In addition to the traditional excavation method, a variety of new non-excavation technologies such as pipe jacking, directional drilling, and lining can also be used. It is the only choice for some places where excavation is not allowed.

At that time, I introduced several of the above advantages to the local situation of customers in Malaysia. Now I list the advantages of HDPE water pipe. If you have customers who want to know about HDPE water pipe, you can refer to the above text. Customers in Malaysia discussed HDPE water supply pipe installation and construction technology with us before purchasing HDPE water pipe. The professional technicians of our factory also introduced the installation and construction technology of HDPE water supply pipes. 

Installation and construction technology of HDPE water supply pipe

Trench excavation

(1) For construction in areas with high groundwater levels or in rainy seasons, precipitation or drainage is required, and measures such as trench support or foundation treatment are required for areas with poor geology.

(2) The depth of the bottom of the trench should be excavated according to the design elevation; when excavating manually, it is required that the bottom of the finally formed trench is flat, dense, and free of hard substances. If there is over-excavation, it must be compacted to meet the design requirements; mechanical excavation , a margin of 200mm shall be reserved above the design tank bottom elevation, which shall be cleaned manually.

(3) The excavation width of the trench bottom is DN+0.30 m. When the pipeline is connected underground, the width of the groove bottom at the interface should be appropriately increased. The width of the groove bottom of the pipeline should not be less than DN+0.50 m, and the total width should not be less than 0.70 m.

(4) When excavating trenches, the undisturbed soil at the bottom of the trench should be strictly prevented from being disturbed. The foundation of polyethylene water supply pipes should be the original soil layer without hard rocks and salts. If the bottom of the trench is hard rock or soft soil, it must pass processing to meet design requirements.

Regarding the content of the above trench excavation, the customer in Malaysia also expressed that recently he needs to know whether the local area meets the conditions for trench excavation. If there is a customer who wants to install HDPE water pipe, he can first check whether the construction foundation is suitable for installation HDPE water pipe requirements. You can also contact us through the website and tell us the local construction conditions, and we will recommend pipes suitable for local conditions to customers.

HDPE Water Pipe Connection

PE water pipes are connected with thermal fusion connection and electrofusion connection. The hot-melt connection is divided into hot-melt socket connection and hot-melt butt connection, and the electric fusion connection is divided into electric fusion socket connection and electric fusion saddle connection. We use hot-melt butt joint construction, its main steps are:

(1) Clamp the spigot section of the pipe and fittings on the butt welding machine, and clean the spigot end.

(2) Move the movable fixture to cut the impurities and oxide layer on the end faces of the welded pipe sections and pipe fittings to ensure that the two butt end faces are smooth, clean and free of impurities.

(3) Straighten the two corresponding parts to be connected on the butt welding machine so that they are on the same axis, and the edge cannot exceed 10% of the wall thickness. Otherwise, the docking quality will be affected.

(4) Put the heating tool between the two connecting surfaces, make the pipe on the butt welding machine close to the heating tool and apply a certain pressure until it melts and forms a smooth and symmetrical flanging along the entire outer circumference of the pipe.

(5) After the heating is completed, the parts to be connected should be separated from the heating tool quickly, and the uniform external force should be used to make them fully contact, and the flange should be uniform in shape.

(6) Keep the butt joint pressure constant, let the joint cool down slowly, the length of cooling time depends on the hardness of the curling edge by hand, and no heat can be felt, remove the butt welding machine, and prepare for the next joint connection again.

The key to the construction quality of PE water supply pipes lies in the hot-melt butt joint between PE pipes and between PE pipes and pipe fittings. The PE pipe hot-melt butt joint process is greatly affected by the environment and human factors. During operation, the temperature of the heating plate, the heat absorption time of the PE pipe, the pressure holding and cooling time, etc. should be strictly controlled. In addition, when connecting operations in cold climates (below -5°C) and strong winds, protective measures should be taken or the connection process should be adjusted.

Regarding HDPE water pipe connection, if you don’t know how to connect, you can refer to the above content, we also provide professional welding machines for pipe connection. The customer in Malaysia said that if the HDPE water pipe can be installed locally, he would like to purchase several welding machines for pipe connection.

HDPE Water Pipe Laying

(1) Pipeline laying should be carried out after the elevation of the trench bottom and the quality of the pipeline foundation have passed the quality inspection. Before laying the pipeline, a new visual inspection of the pipes and fittings should be done. Check the appearance of pipes and pipe fittings for obvious dents, cracks, scratches, and scratches. If there are quality risks, they must be replaced in time.

(2) The small diameter polyethylene water supply pipe can connect 2 or 3 pipes on the ground. Balanced into the groove; if the groove allows, it can be connected in the groove. When the groove is not allowed, after the pipes and fittings are connected, use a reliable soft belt sling to balance the lower groove.

Scratching, twisting or excessive tensile strength should be prevented.

(3) When connecting PE water supply pipes with metal pipes, valves, and fire hydrants, steel-plastic transition joints or special flange connections must be used.

(4) C20 concrete is used to set up concrete supports at pipe elbows, tees, tapered joints, fire hydrants, etc., and flanged valves are reinforced with brick supports.

(5) When laying polyethylene water supply pipes, the turning angle should not be too large, and the allowable bending radius should meet the regulations.

When the laying of pipelines is interrupted, pipe plugs or flange blocking boards should be used to seal the pipe openings to prevent debris from entering the pipelines. During construction in rainy seasons or areas with high groundwater levels, the pipelines should be prevented from floating up.

Backfill Compaction

(1) After the installation and laying of the pipeline is completed, it should be backfilled in time after the acceptance of the concealed project.

(2) The backfill soil on both sides of the pipeline and within 500 lnln above the top of the pipeline shall not contain crushed stones, bricks, frozen soil blocks, etc.

(3) Backfill must be backfilled from both sides of the pipe at the same time, and one layer of backfill should be compacted.

(4) Before the pipeline pressure test, the backfill soil should not be less than 500 mm under normal circumstances.

(5) The large-area backfilling after the pressure test of the pipeline should be carried out when the pipeline is filled with water, and the pipeline should not be in an empty state for a long time after laying.

Geological conditions are different in different countries and regions. If customers want to know more about HDPE water pipe related knowledge and content, they can leave a message on the website. There are other customers from Malaysia who want to install HDPE water pipe, you can contact us first, we have professional technicians who will provide the most suitable method for customers.

Customers who want to know more about HDPE water pipe can click the link below to watch the production process video of HDPE water pipe.