The pressure-bearing capacity of electrofusion fittings is like the elasticity of a rubber band-neither too brittle nor too taut. Common specifications fluctuate between 0.6-1.6 MPa, a value dependent on three factors:
Molecular weight density of the polyethylene material
Fit wall thickness design ratio
Temperature profile control during electrofusion connection
Choosing fittings with appropriate pressure-bearing capacity is like choosing tires for a car; actual road conditions must be considered:
Transporting medium: Hot water systems require a 20% pressure margin compared to cold water systems
Buried environment: Underground pipe racks must consider the additional load from soil settlement
Temperature fluctuations: In areas with large diurnal temperature variations, modified materials with smaller pressure fluctuations are recommended.
Process determines pressure stability. A good electrofusion process ensures more stable pressure performance of the fittings:
Cleanliness of the weld surface directly affects pressure uniformity
Cooling rate control avoids internal stress concentration
Precise matching of energizing time and voltage ensures fusion quality
