PP pipe fittings and PVC, PE plastic pipe fittings

1. Comparison of physical properties

1.1 Physical properties of PP pipe fittings

Heat resistance: PP pipe fittings have good high temperature resistance and can be used for a long time in a temperature range of -20℃ to 95℃. It is especially suitable for hot water pipe systems and some chemical liquid delivery systems.

Corrosion resistance: PP has extremely strong chemical stability and can resist corrosion from most acid, alkali and salt solutions. It is suitable for pipe systems in the chemical and petrochemical industries.

Compressive strength: PP pipe fittings have high compressive strength and are suitable for high-pressure environments, but their impact resistance is slightly inferior to that of PE pipe fittings.

1.2 Physical properties of PVC pipe fittings

Temperature resistance: PVC pipe fittings have a narrow temperature resistance range, generally 0℃ to 60℃, and are not suitable for use in high-temperature environments, so they are more used in cold water systems.

Corrosion resistance: PVC has strong corrosion resistance and can effectively resist most acid and alkali solutions, but chemical reactions may occur in certain solvents or high-concentration chemical media.

Compressive strength: PVC pipe fittings have good compressive strength, but are more brittle and easily break under severe impact.

1.3 Physical properties of PE pipe fittings

Temperature resistance: PE pipe fittings have good temperature resistance and are generally suitable for environments of -40℃ to 60℃, but they will lose a certain degree of rigidity at high temperatures.

Corrosion resistance: PE has extremely strong chemical corrosion resistance and can resist almost all chemical media such as acids, alkalis, and salts. It is particularly suitable for water treatment and wastewater treatment systems.

Impact resistance: PE pipe fittings have better impact resistance than PVC and PP, and have strong flexibility, so they can better resist external impact at low temperatures.

2. Application scenario comparison

2.1 Application of PP pipe fittings

Chemical industry: PP pipe fittings are widely used in the transportation of corrosive liquids in chemical production lines, such as acid and alkali solutions, chemical solvents, etc.

Hot water system: Due to its good high temperature resistance, PP pipe fittings are widely used in hot water pipe systems in buildings.

Food and pharmaceutical industry: PP pipe fittings meet the strict requirements of the food and pharmaceutical industries for hygiene and corrosion resistance, and are often used for food liquid transportation.

2.2 Application of PVC pipe fittings

Water supply system: PVC pipe fittings are widely used in cold water pipe systems, especially in water supply and drainage systems in residential areas and commercial buildings.

Drainage pipes: PVC pipe fittings are widely used in sewage discharge systems due to their good corrosion resistance and cost-effectiveness.

Power and communication industry: PVC pipe fittings are often used in wire protection and pipeline systems in power, telecommunications and other industries.

2.3 Application of PE pipe fittings

Water supply and drainage systems: PE pipe fittings are commonly used in tap water, agricultural irrigation and other fields, especially for large-diameter pipeline systems.

Natural gas and oil transportation: PE pipe fittings can maintain good performance in low temperature and high pressure environments, and are widely used in natural gas and oil pipeline systems.

Underground pipeline system: Due to the high impact resistance and flexibility of PE pipe fittings, they are suitable for underground laying, especially in areas with large earthquakes and impact forces.

3. Cost-effectiveness comparison

3.1 Cost-effectiveness of PP pipe fittings

Raw material cost: The raw material cost of PP is slightly higher than that of PVC and PE, but its excellent temperature and corrosion resistance makes its application in chemical and hot water systems have a high long-term return on investment.

Installation cost: The installation cost of PP pipe fittings is moderate, and due to its high pressure resistance, the maintenance cost required after installation is low.

3.2 Cost-effectiveness of PVC pipe fittings

Raw material cost: The raw material cost of PVC pipe fittings is relatively low, so its price is usually more economical and suitable for large-scale residential, commercial and industrial construction projects.

Installation cost: PVC pipe fittings are easy to install, and due to their wide application, the corresponding accessories and services on the market are relatively mature, which reduces the installation cost.

3.3 Cost-effectiveness of PE pipe fittings

Raw material cost: The raw material cost of PE pipe fittings is relatively high, but its strong corrosion resistance and impact resistance make it more cost-effective in long-term use.

Installation cost: PE pipe fittings are suitable for complex pipe systems due to their high flexibility, and the installation process is relatively simple, which can reduce long-term maintenance and replacement costs.

4. Applicable environment and selection suggestions

4.1 Applicable environment of PP pipe fittings

Applicable to pipe systems that require high temperature resistance and corrosion resistance, such as pipe systems in chemical, hot water, pharmaceutical and other industries.

Using in high-temperature liquids or strong acid and alkali media can provide longer service life and lower maintenance costs.

4.2 Applicable environment of PVC pipe fittings

Applicable to cold water pipes and drainage systems, especially for projects with limited budgets and relatively basic needs, such as residential water supply, sewage treatment, etc.

Due to its low cost, it is suitable for large-scale, standardized pipe systems.

4.3 Applicable environment of PE pipe fittings

Applicable to pipeline systems that require corrosion resistance, high pressure resistance, and impact resistance, such as water supply, drainage, natural gas transmission and other systems.

The flexibility and impact resistance of PE pipe fittings provide more superior performance in situations where large-diameter pipes, underground installations or complex geological environments are required.

Through the analysis of the physical properties, application scenarios and cost-effectiveness of PP pipe fittings, PVC pipe fittings and PE pipe fittings, it can be seen that each has its own advantages and disadvantages. When choosing suitable pipe fittings, you should make a choice based on the actual application requirements:

If the environment requires high temperature and strong corrosion, PP pipe fittings are the best choice;

If the budget is limited and applied to conventional cold water and drainage systems, PVC pipe fittings are cost-effective;

For scenarios that require corrosion resistance, high pressure resistance and impact resistance, especially underground pipelines or gas transportation, PE pipe fittings perform better.