U-PVC Loose Flange (Backing Ring)

Code	Size (Ø)
ТР 100 000 123	50
ТР 100 000 124	63
ТР 100 000 125	75
ТР 100 000 126	90
ТР 100 000 127	110
ТР 100 000 128	125
ТР 100 000 129	140
ТР 100 000 130	160
ТР 100 000 131	200
ТР 100 000 132	225
ТР 100 000 133	250

Категория: PVC pipes and fittings

The loose flange (backing ring) is a heavy-duty structural connection component engineered to construct detachable, high-strength joints on primary distribution and main pipelines. Manufactured from high-impact unplasticized polyvinyl chloride (U-PVC), this flange is designed to be used in conjunction with a flange adaptor (stub flange), securing the system nodes via a standardized bolted configuration.

For the agricultural sector, U-PVC backing rings represent the ideal alternative to traditional metallic flanges, completely eliminating the risks of oxidation and rust when operating under high humidity and continuous contact with dissolved mineral fertilizers. The precision-drilled bolt-hole configuration fully complies with international standards, allowing seamless mating of U-PVC lines with gate valves, non-return check valves, and pumping assemblies from any global manufacturer. The product features exceptional structural rigidity and resistance to warping, ensuring uniform compression of the sealing gasket across the entire perimeter of the joint.

Application: Bolted structural connection of pipeline nodes and integration of isolation/control valves
Type: Loose (slip-on / backing) flange
Operating pressure: Up to 16 bar (PN16) — high load and stress resistance
Material: Impact-resistant, 100% virgin U-PVC
Standardization: Fully compliant with metric ISO/DIN dimensional standards
Resistance: Absolute resistance to UV radiation, weathering, and aggressive groundwater conditions
Service life: Exceeds 50 years under standard operational conditions

Loose flanges are widely utilized in installing central irrigation mainlines, manifold piping for large-scale filtration stations, and connecting heavy-duty, high-capacity pumping aggregates. They are absolutely indispensable at pipeline sections requiring regular dismantling for routine technical maintenance or seasonal winterization. Agricultural Logistics: Thanks to their complete chemical inertness and structural strength, these backing rings are heavily utilized in industrial farming, modern greenhouse complexes, and water treatment plants. Installation Efficiency: Deploying plastic backing rings within agricultural systems significantly reduces the overall weight of the piping network, substantially simplifying open-field installation works while delivering operational reliability and longevity comparable to carbon steel alternatives.