Item

Technical requirements

Outward apprearance

Internal and external surface of pipes should be smooth, flattening, and defects like bubble, obvious scratch, hollow, impurity,irregular colour are not allowed.  Pipe end should be cut smoothly and be vertical with pipe axis.             

Thermal stability

(200 degrees Celsius).min

Greater than 20

Elongation at break(%)

Greater than or equal to 350

Longitudinal retraction rate

Less than or equal to 3

Melt flowing rate(MFR)

(190 degrees Celsius.5kg)g/10min

Before and after processing, the change rate is less than 20%

Static hydraulic intensity

PE80

1. 20 degrees Celsius, ring stress:9.0Mpa, time to reputure:greater than or equal to 100h

2. 80 degrees Celsius, ring stress:4.5 Mpa, time to reputure: greater than or equal to 165h

3. 80degrees Celsius, ring stress:4.0Mpa,time to reputure:greater than or equal to 1000h

PE100

1. 20 degrees Celsius, ring stress:12.4Mpa, time to reputure: greater than or equal to 100h

2. 80 degrees Celsius, ring stress:5.4 Mpa, time to reputure: greater than or equal to 165h

3. 80 degrees Celsius, ring stress:5.0Mpa,time to reputure: greater than or equal to 1000h