Electrofusion saddle tee drilled under pressure

PE pressure drilled electrofusion saddle tee
1. Size range
The nominal outer diameter (main/branch) covers DN20 to DN630, common combinations include DN200×63, DN160×63, DN110×63, etc. For example, the combination of DN250×90 is commonly used in practical projects, which is suitable for branch connection of medium-pressure gas pipelines.
2. Stress rating
? SDR11 series: Compatible with high pressure levels (e.g. 1.6MPa), suitable for high-pressure environments.
? SDR17.6 series: Corresponding to lower pressure levels (such as 1.0MPa), suitable for conventional transmission and distribution scenarios.
3. Materials and Structures
? The main body is made of PE80 or PE100 grade high-density polyethylene (HDPE), which is corrosion-resistant and ultraviolet-resistant.
? Built-in heating wire, heated by electric fusion welding machine to achieve molten connection to ensure tightness.
? Accessories include drilling knives (such as B52x3 threaded type), O-rings, bolts (such as M8×115mm), etc., to meet the needs of different pipe diameters with pressure opening.
4. Certifications and Standards
It complies with GB/T 13663 (PE pipes for water supply) and ISO 4427 (PE pipes for gas) and other standards, and has passed the welding process qualification to ensure the safety of gas pipelines.
Second, the scope of application
1. Core industries
? Municipal gas: It is used for the pressurized branch connection of medium/low pressure gas pipelines, such as courtyard pipe network access and old pipe network renovation.
? Municipal water supply: Branches or repairs of the water supply network are carried out without water interruption to reduce the impact of water outages.
? Chemicals & Petroleum: Convey corrosive media (e.g., acid-alkali liquids) or petroleum products with chemical resistance and sealing properties.
2. Typical scenarios
? Pressurized hole opening: Drilling directly in the running pipeline by a special drilling rig to connect branch pipes or valves, without the need to depressurize or stop the transportation.
? Emergency repair: Quickly connect temporary pipelines or repair leaks to reduce downtime.
? Pipeline network expansion: Add new branches to existing pipelines to meet the expansion needs of users, such as gas access in industrial parks.
3. Media Compatibility
It is suitable for a wide range of fluids such as water, gas, petroleum, chemicals, etc., and the operating temperature range is typically -20°C to 60°C.
3. Technical advantages
? Safe and reliable: the electrofusion connection realizes the integration of pipe fittings and pipes, avoiding the risk of leakage; The whole process of pressurized operation is sealed to prevent gas leakage.
? Efficient and convenient: no need to excavate large areas of road surface, short installation time (usually ≤ 2 hours), reducing the impact on traffic and residents.
? Adaptable: PE80/PE100 pipes can be adapted to SDR11 and SDR17.6, and are compatible with different wall thicknesses and pressure levels.
Fourth, the installation points
1. Equipment matching
Use a pressure drilling rig (such as the British FUSION brand), an electrofusion welding machine and a special fixture to ensure drilling accuracy and welding quality.
2. Procedure
? Mark the location of the borehole and scrape off the oxide layer;
? Install saddle tee and electrofusion welding;
? Start the drill rig to penetrate the main pipe and complete the branch connection.
3. Quality control
Welding parameters need to be read by a scanner or entered manually.