GRE Pipe, GRP Pipe, and GRVE Pipe are all fiber-reinforced polymer pipes, each with its own advantages in industrial applications. Their core difference lies in their resin matrix, which directly affects their performance and application scenarios.

Mechanical Properties: Who Can Handle High Pressure?

• GRE Pipe performs best in high strength, high rigidity, and creep resistance, making it the preferred choice for high-pressure applications (e.g., oil and gas transportation). It can stably withstand high stress over long periods without significant deformation.

• GRVE Pipe also offers strong mechanical properties, with even better toughness than GRE and good impact resistance. However, its absolute rigidity and creep resistance are generally slightly inferior to high-performance epoxy systems.

• GRP Pipe has sufficient mechanical properties for many low-pressure applications, such as water supply and drainage. However, its poor creep resistance makes it unsuitable for high-pressure scenarios.

Chemical Resistance: Who Can Withstand Harsh Media?

• GRVE Pipe is often hailed as the king of corrosion resistance. Its low ester group density provides excellent hydrolysis and permeability resistance, particularly outstanding performance against strong oxidizing acids (e.g., concentrated sulfuric acid, chromic acid), strong alkalis, and wet chlorine gas.

• GRE Pipe offers excellent and comprehensive chemical resistance, performing well against a wide range of acids, alkalis, solvents, and other chemicals. Its overall performance is highly reliable.

• GRP  Pipe has decent chemical resistance, particularly good acid resistance, but poor alkali and solvent resistance. It is suitable for less corrosive environments, such as domestic sewage and rainwater.

Selection Guide: Application Scenarios

• Choose GRE When:

Very high working pressure and structural strength are required (e.g., high-pressure oil and gas transmission, downhole pipes).

Excellent creep resistance is needed for long-term dimensional stability.

The medium involves a complex combination of chemicals requiring comprehensive corrosion resistance.

The working temperature is relatively high.

• Choose GRVE When:

The medium is extremely corrosive, especially strong oxidizing acids and alkalis.

The environment involves alternating chemical exposure and temperature cycles.

Toughness and impact resistance are critical (e.g., shock loads in chemical plants).

• Corrosion resistance is the top priority, and working pressure is moderate.

Choose GRP  When:

Used in municipal engineering (water supply, sewage, irrigation).

The medium is weakly corrosive (e.g., general wastewater, low-pressure side of seawater cooling).

Budget is the primary consideration.

Working pressure and temperature are both in the low range.