HDPE Butt Fusion Welding 45 Degree Elbow
***Advantages and welding of PE butt fusion welding 45 degree elbow pipe fittings
PE butt fusion welding 45 degree elbow pipe fittings is light, which is more common for partial application pe80 pe100 grade level and two standards , including :
PE80 density of about 0.94 g / cm 3, PE100 density of about 0.96 g / cm 3 ;
Easy thermoplastic - easy to process ( such as injection molding, extrusion molding
Remanufacturing easy recycling
Good resistance to radiation and chemical stability
Good resistance to cold , the temperature can be -40 ℃ to +40ºC
Excellent electrical insulation properties , is not affected by electrolytic corrosion
Malleable - extended break PE80> 700% PE100> 600%
Anti- erosion resistance - 8 times better than steel
Approximately half of the low thermal conductivity of glass
Smooth surface , unlike the role of metal pipes rust easily with oxygen crusts
pe pipe connection into fused pipe connections and fittings connected to melt , the more ordinary side, the other , as well as socket connections, this method is applied to a small size.
1 , fused connection : Follow these steps: First check , and then is cut pipe , pipe fittings joints clean , scrape the oxide layer , connecting the two parts of the tube and pipe fittings , calibration welder , welding parameter adjustment in accordance with the welding voltage, welding Dimensions , electricity, welding, and then finally cooled.
2, the hot melt connection : the inner surface of the pipe surface and the pipe is inserted while the welding is non-rotating die head is heated for a few seconds , then quickly removed and welding device , the heat pipe has a fast vertical insertion tube , packing, cooling to .
3 , socket connections, relatively simple, not elaborate here .
Basic performance of raw materials for pipe fittings
| Paramenter | Units | Requirement | Test Value |
| Density | kg/m³ | ≥930 | 23ºC |
| Melt flow rate | g/10min | 0.2~1.4 | 190ºC,5kg |
| Thermal slaility (OIT) | min | >20 | 200ºC |
| Volati lematter content | mg/kg | ≤350 | |
| Moisture content | mg/kg | ≤300 | ASTM D 4019:1994a |
| Carbon black content | % | 2.0~2.5 | |
| Crbon black dispersion | grade | ≤3 | |
| Gas proof components | h | ≥20 | 80ºC,2MPa(Hoop stress) |
Resistance to slow crack growth (En>5mm) | h | 165 | 80ºC,0.80MPa(Testing pressure) 80ºC,0.92MPa(Testing pressure) |
Performance requirement of pipe fittings
| NO. | Item | Requirement | Test value |
| 1 | 20ºC hydrostatic strength | No damage, no leakage | Hoop stress: PE80 10.0MPa PE100 12.4MPa Testing temperature: 20ºC Testing time: ≥100h |
| 2 | 80ºC hydrostatic strength | No damage, no leakage | Hoop stress: PE80 4.50MPa PE100 5.40MPa Testing temperature: 80ºC Testing time: ≥165h |
| 3 | 80ºC hydrostatic strength | No damage, no leakage | Hoop stress: PE80 4.50MPa PE100 5.40MPa Testing temperature: 80ºC Testing time: ≥1000h |
| 4 | Tensile strength of butt-fusion pipe fittings | Test to destruction: Flexible is good | Testing temperature:23ºC±2ºC |
| 5 | Welding strength of electro-fusion pipe fittings | Percentage of brittle peel: ≤33.3% | Testing temperature:23ºC±2ºC |
| 6 | Oxidation induction time | >20min | 200ºC |
| 7 | Melt flow rate | Tube melt rate of change not exceeding ±20% of the raw material | 190ºC, 5kg |
