Heavy-Duty HDPE Siphon Drainage Pipe Fittings for Efficient Drainage

• Customization: Available
• After-sales Service: Support
• Warranty: 50 Years
• Model NO.: PE Siphone Drainage Fitting
• Connection: Welding
• Flexible or Rigid: Flexible
• Material: PE
• Standard: Standard
• Product Name: PE Siphone Drainage Fitting
• Keywords: Electrofusion Fitting
• Usage: Industrial and Warehouse Facilities
• OEM: Available
• Color: Black
• Transport Package: Standard Packaging or Customized
• Specification: Standard Specifications or Customized
• Trademark: FENGFENG PIPE
• Origin: Zhejiang, China
• HS Code: 3917400000
• Production Capacity: 2000000 Pieces/Year
• Package Size: 49.00cm * 36.00cm * 37.00cm
• Package Gross Weight: 25.000kg

Product Description

Product Description

HDPE PE SIPHONE DRAINAGE FITTINGS

High-performance polyethylene fitting for siphonic (vacuum-assisted) roof and storm drainage systems.

Designed for full-flow, high-capacity discharge with smooth profiles and precision hydraulics, reducing pipe sizes and roof outlet counts, preventing backflow.

Common search terms: PE siphonic drainage fittings, siphonic roof drain, PE roof drainage, high-flow siphon fittings, stormwater siphonic system.

Optimized for easy installation, long service life, and low maintenance—ideal for commercial, industrial, and large-span roofing projects.

Application

Siphonic roof drainage for commercial buildings
Office towers, malls, and airport terminals needing efficient stormwater removal.

Industrial and warehouse facilities
Factories and distribution centers benefit from fewer downpipes and simplified drainage.

Covered car parks and podium decks
Fast drainage and low visual impact suit multilevel car parks and podiums.

Public buildings and stadia
Sports venues, exhibition halls, and stations needing reliable, high-capacity roof drainage during heavy rain.

Retrofitting and roof upgrades
Upgrading older gravity systems to siphonic increases capacity without major structural work.

Product Parameters

HDPE SIPHONE DRAINAGE FITTINGS	SIZE
	50-315MM

Detailed Photos

HIGH FLOW, SPACE-SAVING DESIGN

SMOOTH, CLOG-RESISTANT INTERIOR

Max discharge capacity with fewer downpipes and smaller diameters saves material and space.

Polished PE paths reduce deposition, allowing rapid rainwater removal and lowering maintenance.

DURABLE PE CONSTRUCTION

RELIABLE SIPHONIC PERFORMANCE

Corrosion-resistant polyethylene resists chemical attack and degradation, ensuring long outdoor and buried service life.

Hydraulic geometry and design ensure vacuum-assisted flow, preventing air ingress and maintaining full-pipe flow.

FAQ

1. Why choose us?
Factory Direct Pricing, Large Stock, Quality
(1).Manufacturer: Fittings from 20mm to 1400mm, rated PN10 to PN25.
(2).Custom branding & products, supported by three plants.
(3).Large inventory
(4).Competitive pricing with strict in-house quality control.
We rapidly source and consolidate all related piping products.

Common Uses of HDPE/PE/PPR/PERT II pipe & fittings?
Zhejiang Fengfeng Pipe Industry's HDPE/PE/PPR/PERT II pipe & fittings excel in construction, household, and agricultural applications. With strength and versatility, they serve urban and rural water projects, sewage systems, drainage, storm-water management, firewater pipelines, infrastructure, airports, railways, highways, sports venues, irrigation, geothermal systems, solar/wind farms, municipal water networks, agricultural irrigation, gas networks, natural gas pipelines, industrial systems, chemical plants, mining, and power plants.

Key Benefits of Electrofusion Fitting?
Zhejiang Fengfeng Pipe Industry's electrofusion fittings form a zero-leakage, permanent joint through a precisely controlled process, achieving a monolithic molecular bond between fitting and pipe, beyond mechanical sealing.

Detailed breakdown of the leak-proof connection process:

Core Principle: Molecular Diffusion & Interfusion:
Thermal fusion is key. When heated (~200-220°C), HDPE/PPR becomes viscous, allowing polymer chains to interdiffuse and entangle. Cooling fuses them into a continuous mass without seams.

Step-by-Step Zero Leakage Process

Role of "Smart" Technology in Ensuring Integrity:
Modern electrofusion uses embedded data in fittings, read by intelligent welders, ensuring leak-proof processes:
Barcode/Data Matrix: Holds welding parameters (voltage, time) specific to fitting size/material.
Automatic Process Control: Welder reads code, executes cycle automatically, removing human error.
Real-Time Monitoring: Welder checks resistance, temp, energy. Deviations signal cycle failure, preventing defects.
Data Logging: Digital record (date, time, location) ensures traceability and proof of correct installation.

(4).Comparison: Why Mechanical Fittings Can Leak:Electrofusion is superior:Feature Electrofusion Joint.Mechanical/Gasketed Joint.Sealing Mechanism Homogeneous molecular bond. Elastomeric seal compression against pipe surface.Weakness None, if procedure is correct. Seal aging, hardening, and creep over time. Vibration and thermal cycling sensitivity causing bolts to loosen.Performance Static or improves over time. Lifetime equal to pipe (50+ years). Degrades over time. Needs periodic re-torquing and seal replacement.

Conclusion: The Zero Leakage Assurance
Zhejiang Fengfeng Pipe Industry's electrofusion joint ensures no leaks by eliminating leakage interfaces. It's not a seal but a seamless union. Material science (molecular fusion), precision engineering (embedded coil & bead), and process intelligence (automated welding with data traceability) create an intrinsic, permanent, verifiable joint. This method is essential for leak-sensitive uses like gas, potable water, and chemical pipelines.

4.What is the Process Purpose & Anti-Leak Mechanism?
Step 1: Surface Preparation Pipe end is scraped to expose clean material, removing contamination that hinders molecular diffusion and causes weak bonds.

Step 2: Clamping & Alignment:
Pipe and fitting are securely clamped straight and aligned with a precise gap. Prevents stress and misalignment that cause voids or thin spots.

Step 3: Initiation & Heating:
Voltage is applied to the resistance wire coil in the fitting. The coil heats uniformly, melting the fitting's inner and the pipe's outer surfaces. Ensures a precise, uniform melt zone. Controlled heating prevents cold spots, incomplete fusion, and leaks.

Step 4: Melting & Interfusion:
Molten materials merge. Internal pressure ensures intimate contact, forcing materials to intermix. Fusion bead melts to fill gaps, compensating for surface irregularities, ensuring no voids.

Step 5: Controlled Cooling:
Power is cut, allowing natural, uniform cooling under restraint. Polymer chains solidify, preventing stress cracks. A stress-free joint maintains integrity under cyclic pressure and temperature changes.

5.What is HDPE?
High-Density Polyethylene (HDPE) is a strong yet lightweight thermoplastic made from petroleum. Known for its high strength-to-density ratio, HDPE has been popular since the 1950s due to its durability, impact resistance, and ability to withstand various conditions.
Using virgin HDPE from top producers like SHANGHAI JINFEI PETROCHEMICAL and ZHEJIANG PETROLEUM & CHEMICAL (grades: BH 1064, TR480AT 1768, 23050 HDPE 2125366, 07111) is key to the performance, safety, and value of pipe fittings for Zhejiang Fengfeng Pipe Industry, bringing measurable benefits.

(1).Guarantee of Core Performance & Longevity
Virgin Material Role: Maintains LTHS, ensuring PE100/PE100RC classification for 50+ years at PN16, PN25. Recycled material risks strength loss, failure, and SCG, leading to bursts.

(2).Environmental Stress Crack Resistance (ESCR).Virgin polymers resist chemicals, extending lifespan. Low ESCR in recycled materials can cause stress-initiated cracks.

(3).Consistent Electrofusion Quality: Stable MFR ensures uniform heating and fusion, creating a strong bond. Impurities lead to uneven heating and leaks.

(4).Dimensional Stability & Low-Temperature Toughness: Predictable shrinkage and impact resistance prevent fractures at -20°C. Recycled materials risk warpage and brittleness.

2. Critical Value for Projects & Business:
(1).Risk Mitigation & Safety Assurance:
Role: Virgin material is essential in gas, water, or chemical pipelines to prevent catastrophic failures.
Value: Protects reputation and avoids costs from failures, liability claims, and environmental damage.

(2).Passport to International Certification & Markets:
Role: Certifications (CE, ISO, WRAS) demand traceability and performance data, achievable only with virgin resin.
Value: Essential for entry into regulated markets like the EU, Middle East, and North America.

(3).Lowest Total Cost of Ownership:
Role: Higher initial cost ensures a maintenance-free system for 50+ years, saving on repairs.
Value: Reduces lifetime costs significantly; a single repair costs more than the price difference.

(4).Foundation for Credible Quality Commitment:
Role: Traceability to top producers guarantees quality.
Value: Provides compelling proof to engineers and contractors, building trust and justifying a premium.

Conclusion: The Strategic Message
Highlighting traceable, virgin raw materials sends a strong message to clients, especially international buyers:
Zhejiang Fengfeng Pipe Industry's reliability is crafted at the molecular level. We invest in higher material costs to protect your projects against decades of risk and potential catastrophic expenses. This isn't just a fitting—it's a 50-year performance warranty.
This shifts the competitive focus from price to value, responsibility, and risk management, positioning Zhejiang Fengfeng Pipe Industry as a provider of critical infrastructure solutions, beyond mere commodities.