PE ball valve for gas pipelines

1 Overview
Underground gas pipe network in the city system, polyethylene (PE) pipes are more and more applications. As with life,

with the performance, welding is simple, good sealing performance, easy to use ball valve

of polyethylene pipes have been indispensable to the control as more and more use of components and attention.
2, material selection
Polyethylene is a thermoplastic engineering plastic material, has certain strength, stiffness, toughness,

impact resistance, corrosion resistance and wears resistance. By controlling the polymerization process and in the polymerization by adding

a certain amount of co monomer, you can adjust or improve the performance of polyethylene material. Therefore, advanced polymerization

process or a direct result of differences in material properties. For long-term safe operation of pipeline systems, gas pipes, fittings and

valves must be graded according to the type of material Pipe Compound (PE80, PE100), and mixed ingredients, can not use the master batch.

Material color is generally black and yellow.
3, type structure
Polyethylene gas valve with the valve is generally divided into small polyethylene valve (SD63 below) and large

polyethylene valves (SD63 or more, with SD63). No small polyethylene valves generally bleeding mouth, large polyethylene valve can be used

according to need no, set one or set two elution mouths.
4 Features
(1) Resistant to corrosion. Polyethylene is inert material, except for a few strong oxidants, can be resistant to the

erosion of a variety of chemical media. Electrochemical corrosion-free, no coating.
(2) No leakage. Polyethylene brass ball valve body and the end of the connection pipe connecting part mainly fusion (fusing connection or

fused connection), weld width, sealing performance. Type joints with rubber rings or other mechanical joints compared to joints do not

exist because of the risk of distortion caused by external leakage.
(3) High toughness. Polyethylene is a highly ductile material, the

elongation at break generally more than 500%, based on management’s ability to adapt to uneven settlement is very strong. Is also a good

seismic performance of the pipeline?
(4) Long life. Polyethylene materials can be used more than 50 years, which is foreign to the

tensile strength based on polyethylene pipe loop hydrostatic design basis of long-term value (HDB) identified, already recognized by

international standards.
(5) to facilitate construction. Polyethylene valves and light weight compared to metal valves, easy to

install. Open and close easily, the operating torque is small. For the full bore valve, the pressure loss.
5, application
High pressure polyethylene pipe should be set on the charge of sub-polyethylene valve and the valve should be on

both sides of the elution tube. High pressure polyethylene gas pipe branch should be set at the starting point of polyethylene valves, set

the diffuse unilateral control. PE ball valve is mainly density polyethylene pipe buried in the package, cut off all gas transmission and

media streaming. The valve can be buried in the ground, just install a simple sheath, opening and closing seat accessories, you can use a

special wrench to perform opening and closing operations on the ground, polyethylene ball valve for the media to meet the national standard

gas purification , liquefied petroleum gas and artificial gas.
6 Conclusions
PE ball

valve opening and closing of the torque, the valve no corrosion, no maintenance and repair, the service life of 50 years to

improve the integrity of polyethylene pipe network system. The overall style of the body, eliminating the possibility of leakage,

polyethylene, polyethylene pipe connected with the ball, no need to set the valve shaft, buried construction, the body can use the butt end

of pipe welding method of welding or electrical connections, valves, The opening and closing operations on the ground than the overall

economic efficiency of conventional metal ball about 2 times higher. Polyethylene pipe with excellent performance, with the polyethylene

material for further research and development, polyethylene pipes and valves have better applications.
From the original1checkvalve
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