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18

2021-09

Introduction to the Ground Load Pressure of PE Water Supply Pipes

A load is an external force and other factors that induce internal forces and cause deformation of a structure or component. Alternatively, in accordance with standard practice, various direct effects are applied to an engineering structure to produce the corresponding structural or component responses. Typical loads include structural self-weight, floor live loads, roof live loads, roof-area snow loads, vehicle loads, and crane loads.

20

2021-11

What is a steel-plastic transition fitting, and what is it mainly used for?

The anti-corrosion heat-shrink application of steel-to-plastic transition fittings is used for the underground and wall-mounted anti-corrosion protection of DN natural gas steel pipes, requiring a dedicated design solution that addresses corrosion protection for both straight-run and spliced steel pipes, as well as the joint areas of the steel-to-plastic transition sections—ensuring corrosion resistance, tight sealing, wear resistance, and aesthetic appeal. It can also be applied to seal and protect against corrosion at locations such as pipe slip-on flanges, insulated flanges, and clamp (lock) connections.

What is a steel-plastic transition fitting, and what is it mainly used for?

23

2021-11

What should be noted when converting between steel and plastic?

Steel-to-plastic transition pipes or flanged connections are primarily used to connect PE pipes to pipes and pipe fittings made of other materials. They enable easy and rapid connections. Steel-to-plastic transition pipes consist of a plastic end and a metal pipe end, and are available in various configurations, including straight sections, bends, threaded joints, and welded joints.

What should be noted when converting between steel and plastic?

26

2021-11

Characteristics, Installation Steps, and Key Considerations for PE Electrofusion Fittings

Electrofusion fittings are plastic (polyethylene) pipe fittings that achieve a joint by melting and fusing the mating surfaces through resistive heating generated by an electric current. The nominal current rating (i.e., amperage) is the primary specification; in certain low-voltage applications where voltage requirements are modest, only the amperage rating is typically indicated.

Characteristics, Installation Steps, and Key Considerations for PE Electrofusion Fittings

26

2021-11

Characteristics, Installation Steps, and Key Considerations for PE Electrofusion Fittings

Electrofusion fittings are plastic (polyethylene) pipe fittings that achieve a joint by melting and fusing the mating surfaces through resistive heating generated by an electric current. The nominal current rating (i.e., amperage) is the primary specification; in certain low-voltage applications where voltage requirements are modest, only the amperage rating is typically indicated.

Characteristics, Installation Steps, and Key Considerations for PE Electrofusion Fittings

29

2021-11

Factors Affecting the Weld Quality of PE Electrofusion Fittings

PE electrofusion fittings are a type of PE pipe fitting, primarily used for connecting PE pipes to steel-reinforced mesh skeletons and PE gas pipelines. Given the numerous technical parameters involved in electrofusion fittings, the likelihood of issues arising is relatively high; therefore, ensuring the quality of connections made with PE electrofusion fittings is a critical challenge.

Factors Affecting the Weld Quality of PE Electrofusion Fittings

06

2021-12

Why choose PE pipe fittings? It’s all down to these advantages!

PE pipe fittings are manufactured primarily from polyethylene, with the addition of antioxidants and UV-absorbing additives, and are formed through extrusion. Pipes produced using this process exhibit excellent compressive strength, a wide operating temperature range, and outstanding performance under both sub-zero temperatures as low as –20°C and elevated temperatures up to +40°C. In addition, these pipes boast a long service life and superior overall performance—typically 50 years. Since no heavy metals are incorporated into the material, the pipes have low toxicity, resist fouling, and are less prone to bacterial growth even in long-term humid environments, making them widely used in water supply piping systems.

Why choose PE pipe fittings? It’s all down to these advantages!

09

2021-12

What are the characteristics of PE pipe fittings?

PE pipe fittings exhibit unique flexibility and excellent scratch resistance, and the flexibility of polyethylene piping systems offers substantial technical and economic benefits. The inherent flexibility of polyethylene is a key property that significantly enhances the value of this material in pipeline engineering. Its high flexibility allows polyethylene pipes to be coiled into long lengths, thereby reducing the need for numerous joints and fittings.

What are the characteristics of PE pipe fittings?

12

2021-12

Common Faults and Troubleshooting Methods for PE Ball Valves

PE ball valves may experience internal leakage during operation or installation. Frequent opening and closing during use, or improper installation that does not comply with the specified requirements, can both lead to malfunction of the PE ball valve. In this section, we will explain the causes of internal leakage in PE ball valves and the corresponding troubleshooting methods.

Common Faults and Troubleshooting Methods for PE Ball Valves

15

2021-12

Introduction to Standard Gas PE Ball Valves

Standard gas PE ball valves, standard underground gas PE ball valves, and underground gas PE ball valves (hereinafter referred to as PE ball valves) are all plastic ball valves. They are primarily designed for use with buried polyethylene (PE) pipelines and are employed to convey and shut off the flow of various gaseous media. PE ball valves can be directly buried underground; with only a simple protective sleeve and associated fittings installed, they can be opened and closed from the ground using a wrench. They are the ideal actuating devices for conveying and shutting off medium flow in urban gas transmission systems that utilize buried polyethylene pipelines.

Introduction to Standard Gas PE Ball Valves
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