Shanxi Kaisheng Plastic Co., Ltd. is one of the most reliable manufacturers and suppliers of ppr union fittings in China. Please feel free to buy CE approved ppr union fittings in stock here from our factory. All customized products are with high quality and competitive price. Contact us for quotation.
Product Overview
Ppr Union Fittings are used to connect PP-R piping while providing a serviceable union section for locations where future maintenance or component replacement may be required. They are suitable for PP-R water distribution and heating systems where the selected size, pressure class and connection configuration match the project requirements.
Product Specifications
|
Item |
Specification |
|
Product |
PPR Union Fittings |
|
Material |
PP-R |
|
Connection |
Heat Fusion / Threaded Union Connection |
|
Pressure Rating |
PN10 / PN12.5 / PN16 / PN20 / PN25 |
|
Size |
Customized / Available Sizes |
|
Measurement |
Metric |
|
Color |
Green / White / Yellow / Gray / Custom |
|
Application |
Water Supply / Heating / Irrigation |
|
Customization |
OEM / ODM |
|
Standard |
According to applicable PP-R system standard |
Why Procurement Teams Choose Our PPR Unions
Rated for continuous PN25 (2.5 MPa) operation, rigorously validated through 1-hour hydrostatic pressure testing at 1.5 times working pressure to guarantee long-term burst resistance.
Engineered for continuous operation at 70°C and safe structural handling of short-term thermal spikes up to 95°C without material degradation.
Produced via high-speed, automated temperature-controlled injection molding that prevents internal cold spots and ensures uniform, consistent wall thickness across all sizes from 20mm to 110mm.
Integrated high-grade brass or plastic inserts feature precisely machined ISO-standard threads, reducing the risk of cross-threading during metal-to-plastic pipeline transitions.
Installation Compatibility & On-Site Risk Mitigation
Socket Fusion Tolerance Margin: Designed with a precise 0.2 mm positive taper on the fusion socket, actively compensating for minor handheld heating iron deviations during complex site installations.
Torque-Resistant Hex Nut Profile: The union nut features reinforced external ribbing and a robust wall profile, allowing standard wrench tightening without fracturing or cracking the polymer structure under high torque.
Advanced Sealing Gasket Placement: Utilizes a high-elasticity EPDM O-ring or flat seat profile engineered to maintain a permanent hydraulic seal, absorbing minor pipeline thermal expansion and contraction cycles.
Real-World Application Scenarios & Engineering Pitfalls Avoided
Typical Job-Site Integration
Commercial Building Risers: Used in vertical water supply shafts where modular maintenance sections are required to isolate floors during servicing without shutting down the entire building network.
HVAC Mechanical Rooms: Deployed near pump connections and heat exchangers where vibration isolation and periodic component inspection are necessary.
How We Mitigate Common Installation Failures
The Issue: Overtightening metal-to-plastic union nuts with pipe wrenches often crushes polymer threads.
Our Solution: We engineered an optimized hexagonal wall profile with localized structural ribs that distribute wrench pressure evenly, minimizing the risk of on-site cracking during fast-paced installations.
Supply Chain Continuity & Packaging Resilience
Export-grade packaging specs: Packed in multi-layer corrugated cartons reinforced with corner protectors, then palletized and shrink-wrapped to withstand multi-leg container transit.
Stock visibility and buffer management: Maintains standard stock levels for 20mm to 63mm dimensions to support scheduled container consolidation without unexpected lead time extensions.
Clear carton labeling: Each master box displays item codes, batch numbers, net/gross weights, and barcode tracking to streamline warehouse intake at the destination port.
Frequently Asked Questions
Q: Do you provide samples for site qualification?
A: Yes. We ship samples via courier for testing. Please contact our engineering department with your project requirements so we can send the correct size and pressure rating.
Q: What is the average lead time for a 20-foot container?
A: For standard items in stock, shipment is usually prepared within 10-15 business days. Customized orders require 25-30 days for tooling setup and production.
Q: What documents are included with the shipment for customs clearance?
A: Commercial invoices, packing lists, Certificates of Origin (CO), and batch-specific Certificates of Analysis (COA) are provided with every order.
Q: Can the union fittings withstand freeze-thaw cycles during unheated winter construction?
A: The random copolymer structure resists minor low-temperature impacts, though systems must be properly drained and insulated before freezing conditions occur.
Q: Are your union fittings compatible with pipes from other manufacturers?
A: Yes, as long as the mating pipes strictly adhere to external diameter and wall thickness specifications outlined in ISO 15874.
Q: What is your standard minimum order quantity (MOQ) for custom-colored fittings?
A: Custom color runs require a specific masterbatch preparation, typically starting at 1,000 pieces per size depending on the diameter.
Q: How do you handle transit damage or missing items upon container arrival?
A: We photograph pallet configurations prior to loading and accept third-party port arrival reports to process immediate replacements or credit notes.
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