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DN50-630 PE100 HDPE End Cap for Water Systems

Brand Name: LONGYE
Product Name: HDPE fittings
Color: Black
Size: 75-1000mm
Pressure: PN10/PN12.5/PN16
Sample: Free Sample
Availability:
Quantity:

Specification(mm) dn/dn1 L H Item Number
D75 75 81 67 LYGYD11-75
D90 90 90.5 75 LYGYD11-90
D110 110 94 77 LYGYD11-110
D125 125 94 77 LYGYD11-125
D140 140 96 79 LYGYD11-140
D160 160 99 80 LYGYD11-160
D180 180 108 80 LYGYD11-180
D200 200 103.5 80 LYGYD11-200
D225 225 105 80 LYGYD11-225
D250 250 115 90 LYGYD11-250
D280 280 118 90 LYGYD11-280
D315 315 130 90 LYGYD11-315
D355 355 131 90 LYGYD11-355
D400 400 132 90 LYGYD11-400
D450 450 138 90 LYGYD11-450
D500 500 130 90 LYGYD11-500
D630 630 145 95 LYGYD11-630
D710


LYGYD11-710
D800


LYGYD11-800
D900 900 170 120 LYGYD11-900
D1000 1000 175 125 LYGYD11-1000


Product Overview


The DN50-630 PE100 HDPE End Cap for Water Systems is a heavy-duty termination fitting engineered to provide secure sealing for large-diameter polyethylene pipelines in municipal, industrial, and water treatment applications. Constructed from virgin PE100 grade HDPE certified under EN 12201-1:2024—the latest standard for pressure piping systems—this end cap accommodates pipe sizes from DN50 to DN630 (50mm to 630mm OD), addressing the needs of large-scale infrastructure projects. Rated for 16 bar (232 psi) working pressure at 20°C, it creates a permanent seal that eliminates leakage risks in critical water distribution systems .


The one-piece molded construction ensures uniform wall thickness with exceptional dimensional tolerances (±0.01mm), providing consistent performance across all size ranges. Its fusion-welded design creates a homogenous bond with the parent pipe that is actually stronger than the pipe itself, ensuring long-term integrity in both buried and above-ground installations. With a service life exceeding 50 years under continuous operation, it outperforms concrete and metal end caps by eliminating corrosion and reducing lifecycle costs by up to 60% .


DN50-630 PE100 HDPE End Cap for Water Systems


Product Features


Large-Diameter Fusion Technology

Designed specifically for butt fusion installation in large-diameter applications, the end cap features precision-machined fusion surfaces with alignment markers to ensure proper joint formation. The fusion zone incorporates a 30% thicker wall section that maintains full pressure rating after welding, verified through 10,000-hour hydrostatic pressure testing at 20°C. For sizes ≥315mm, internal stiffening ribs prevent deformation during fusion and under pressure .


Structural and Pressure Performance

The PE100 material retains 90% of its strength at 40°C, making it suitable for tempered water applications in municipal and industrial systems. It exhibits exceptional creep resistance, maintaining pressure integrity after 50 years of continuous operation at design pressure. The cap’s flexibility allows up to 3° of deflection without compromising the seal, absorbing ground movement and settlement in buried installations .


Environmental Resistance

Formulated with 2.5% carbon black additive, the HDPE end cap provides superior UV resistance for above-ground installations, preventing photo-oxidation and brittleness in direct sunlight. It is completely resistant to corrosion from chlorinated water, soil chemicals, and common disinfectants used in water treatment. The material remains flexible at temperatures as low as -40°C and stable up to 60°C, ensuring reliable performance in extreme climate conditions .


Applications


This heavy-duty end cap provides secure termination in large-scale water systems:


Municipal Water Mains: Seals pipeline ends in urban water distribution networks during expansion projects and temporary shutdowns.

Wastewater Treatment: Terminates pressure sewer lines and force mains in municipal wastewater collection systems.

Industrial Piping: Provides permanent or temporary termination of large-diameter HDPE process lines in power plants, chemical facilities, and manufacturing plants.

Water Storage: Seals pipeline connections to reservoirs, tanks, and storage facilities in potable water and irrigation systems .


FAQ


What size range does this end cap cover?

The end cap is available for pipe sizes from DN50 (50mm OD) to DN630 (630mm OD), with specific models optimized for each size to ensure proper fusion and pressure performance.


How is it installed on large-diameter pipes?

Installation requires a hydraulic butt fusion machine with temperature-controlled heating plates set to 190±10°C. The precision-machined fusion surface ensures proper heat distribution and bond formation .


Is it suitable for potable water systems?

Yes. The PE100 grade HDPE meets NSF/ANSI 61 requirements for potable water contact, ensuring no leaching of harmful substances into drinking water supplies .


How does it handle ground movement in buried installations?

The flexible HDPE construction allows up to 3° of deflection without compromising the seal, absorbing soil shifts and settlement that would cause leaks in rigid concrete or metal end caps .


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Zhe Jiang Longye Pipes Industry Co., Ltd. is specilalized in producing PP-R pipes; pipe fittings, HD-PE water-supplying pipes, heatmelting socket pipe fittings, plastics connecting pipe fittings and water separators.
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