{"id":13891,"date":"2026-03-31T03:18:22","date_gmt":"2026-03-31T03:18:22","guid":{"rendered":"https:\/\/www.pvcconduitmanufacturer.com\/?page_id=13891"},"modified":"2026-03-31T03:23:43","modified_gmt":"2026-03-31T03:23:43","slug":"ppr-coupling","status":"publish","type":"page","link":"https:\/\/www.pvcconduitmanufacturer.com\/vi\/ppr-coupling\/","title":{"rendered":"Kh\u1edbp n\u1ed1i PPR"},"content":{"rendered":"\t\t
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\u00a0Home <\/a>-> Plumbing Pipe Fittings<\/a>\u00a0<\/a> -> \u00a0PPR Stop Valve<\/a><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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PPR Coupling NSF & WATERMARK Certified Pipe Fittings Factory<\/h1>\t\t\t\t<\/div>\n\t\t\t\t
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– NSF & WRAS & WATERMARK Certified<\/p>

– DVGW & DIN & TCVN & ISO Certified<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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Features<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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A PPR (Polypropylene Random Copolymer) coupling is a type of PPR pipe fitting used to quickly connect two PPR pipes of the same or different diameters to form a leak-proof and durable connection in hot and cold water transportation. Typically used in residential or commercial piping systems, it involves heat fusion welding to create a permanent, corrosion-resistant piping system.<\/p>

\u2022\u00a0 Operating temperature ranges from 3 \u2103 to 95 \u2103, widely adaptable to both cold and hot water supply needs.
\u2022 \u00a0Certification and compliance. Ctube PPR coupling comply with NSF, WRAS, DVGW, DIN, TCVN and ISO requirements.
\u2022\u00a0 Excellent hydrophobicity. Patented technology improves hydrophobicity efficiency by 10%-15%, making it the smart choice for builders and contractors.
\u2022 \u00a0Non-toxic and Corrosion-Resistant. PPR material is non-toxic and additive-free, and is corrosion- and rust-resistant with a service life of over 50 years.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Product Details<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Multi-Certified & High Quality<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Certified by NSF, WRAS, DVGW, DIN, TCVN and ISO. Compatible with standards in North America, Europe and Southeast Asia, ensuring your product can be installed smoothly.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Excellent Temperature Range<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Excellent temperature range. Minimum operating temperature is 3\u00b0C (37.400\u00b0F), maximum continuous operating temperature reaches 70\u00b0C (158.00\u00b0F), and peak operating temperature reaches 90\u00b0C (194.00\u00b0F). Fully meets the requirements for cold and hot water delivery, ensuring long-term stable operation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Highly Effective Hydrophobic<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The Ctube\u00ae series PPR pipes utilize a proprietary patented technology to enhance hydrophobicity, allowing for smoother water flow. Real-world testing has shown that it can increase water flow speed by 10-15%, resulting in smoother water flow.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Non-toxic & Corrosion-Resistant<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Made with 100% new raw materials and free of heavy metals, it is non-toxic and odorless, ensuring safe drinking water. The PPR material is corrosion-resistant, guaranteeing a service life of over 50 years, and is recyclable, reducing waste and pollution.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Performance Data Sheet<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Material<\/strong><\/td>PPR (Random Polypropylene)\u00a0<\/td><\/tr>
Size<\/strong><\/td>DN16 to DN160 (16mm to 160mm)<\/td><\/tr>
Type<\/strong><\/td>Pipe Coupling<\/td><\/tr>
Brand Name<\/strong><\/td>Ctube<\/td><\/tr>
Colors<\/strong><\/td>Green, Orange<\/td><\/tr>
Application<\/strong><\/td>Cold and Hot Water Supply<\/td><\/tr>
Standard<\/strong><\/td>NSF\/ANSI\/CAN 61, ISO 15874,EN ISO,DIN 8077, DIN 8078,WRAS, DVWG, WaterMark, GB\/T<\/td><\/tr>
Pressure Rating<\/strong><\/td>1.25MPa, 1.6MPa, 2.0MPa, 2.5MPa,<\/td><\/tr>
Density<\/strong><\/td>23\u00b0Cg\/cm3<\/td><\/tr>
Melting Flow Index MFI<\/strong><\/td>190\u00b0C, 5 kg, 230\u00b0C, 2,16 kg, 230\u00b0C, 5 kg<\/td><\/tr>
Tensile Stress<\/strong><\/td>23\u00b0C, 50 mm\/dk, 50 mm\/min. \u226520Mpa<\/td><\/tr>
Working Temperature<\/strong><\/td>70\u2103 (Sustained) to 95\u2103 (Transient)<\/td><\/tr>
Specific Gravity<\/strong><\/td>0.89-0.91 (20\u00b0C)<\/td><\/tr>
Modulus of Elasticity<\/strong><\/td>800 N\/mm2 (20\u00b0C)<\/td><\/tr>
Thermal Conductivity<\/strong><\/td>0.23-0.24 w\/(m-k) (20\u00b0C)<\/td><\/tr>
Coefficient of Linear Expansion<\/strong><\/td>0.14-0.16 mm\/(m.k)<\/td><\/tr>
Longitudinal Reversion<\/strong><\/td>\u22642% (135\u00b0C, 2h)<\/td><\/tr>
Place of Origin<\/strong><\/td>Guangdong, China<\/td><\/tr>
Shipping<\/strong><\/td>By sea<\/td><\/tr>
Samples<\/strong><\/td>Available<\/td><\/tr>
Customized Services<\/strong><\/td>Available<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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PPR Stop Valve Size Chart<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Item No.<\/strong><\/td>dn (mm)<\/sub><\/strong><\/td>L(mm)<\/strong><\/td>PCS\/CTN<\/strong><\/td><\/tr>
CTPPRCA<\/td>20<\/td>31.0<\/td>870<\/td><\/tr>
CTPPRCB<\/td>25<\/td>33.5<\/td>520<\/td><\/tr>
CTPPRCC<\/td>32<\/td>37.5<\/td>300<\/td><\/tr>
CTPPRCD<\/td>40<\/td>42.0<\/td>260<\/td><\/tr>
CTPPRCE<\/td>50<\/td>46.5<\/td>210<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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PPR Pipe Technical Specification Chart (DIN 8077\/8078)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Outer Diameter<\/strong><\/td>PN 10 (SDR 11)<\/strong><\/td>PN 12.5 (SDR 9)<\/strong><\/td>PN 16 (SDR 7.4)<\/strong><\/td>PN 20 (SDR 6)<\/strong><\/td>PN 25 (SDR 5)<\/strong><\/td><\/tr>
Applications<\/td>Cold Water<\/td>Cold water\/Low Pressure<\/td>Hot & Cold Water<\/td>High-pressure Hot Water\/Heating<\/td>Special High Voltage Projects<\/td><\/tr>
(mm)<\/td>T (mm)<\/td>T\u00a0 (mm)<\/td>T\u00a0 (mm)<\/td>T\u00a0 (mm)<\/td>T\u00a0 (mm)<\/td><\/tr>
20<\/td>1.9<\/td>2.3<\/td>2.8<\/td>3.4<\/td>4.1<\/td><\/tr>
25<\/td>2.3<\/td>2.8<\/td>3.5<\/td>4.2<\/td>5.1<\/td><\/tr>
32<\/td>2.9<\/td>3.6<\/td>4.4<\/td>5.4<\/td>6.5<\/td><\/tr>
40<\/td>3.7<\/td>4.5<\/td>5.5<\/td>6.7<\/td>8.1<\/td><\/tr>
50<\/td>4.6<\/td>5.6<\/td>6.9<\/td>8.3<\/td>10.1<\/td><\/tr>
63<\/td>5.8<\/td>7.1<\/td>8.6<\/td>10.5<\/td>12.7<\/td><\/tr>
75<\/td>6.8<\/td>8.4<\/td>10.3<\/td>12.5<\/td>15.1<\/td><\/tr>
90<\/td>8.2<\/td>10.1<\/td>12.3<\/td>15<\/td>18.1<\/td><\/tr>
110<\/td>10<\/td>12.3<\/td>15.1<\/td>18.3<\/td>22.1<\/td><\/tr>
160<\/td>14.6<\/td>17.9<\/td>21.9<\/td>26.6<\/td>32.1<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Notes:<\/em><\/strong>
SDR = D\/S<\/em>
D means Outer Diameter\uff0cS means Wall Thickness<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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Applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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  • Residential Building;<\/li>
  • Commercial Building;<\/li>
  • Shopping Mall;<\/li>
  • Industry Plants;<\/li>
  • Hospital;<\/li>
  • Schools;<\/li>
  • Hotels;<\/li>
  • Laboratories and Chemical.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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    FAQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Are your couplings rated for high-pressure commercial systems (PN20 \/ PN25)? <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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    Yes, all our standard PPR couplings are engineered with a PN25 pressure rating<\/b>. We maintain a heavily reinforced, uniform wall thickness throughout the entire fitting. This structural integrity ensures the coupling can easily withstand the high pressure and water hammer effects common in commercial high-rise buildings and industrial booster pump networks.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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    Do you use any recycled regrind material to lower the cost of basic fittings like couplings? <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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    Absolutely not. We operate under a strict zero-regrind policy. Even for high-volume basic fittings like couplings, we use 100% virgin PPR-C material<\/b> sourced from industry leaders like Borealis or Hyosung. This ensures the fittings remain highly impact-resistant, non-toxic, and fully certified for potable (drinking) water systems without becoming brittle over time.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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    How do you prevent thread stripping in your Female\/Male Threaded Couplings (Transition Sockets)? <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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    For threaded transition couplings, we utilize heavily knurled CW617N brass inserts<\/b>. During the injection molding process, the PPR material flows into the deep anti-slip grooves of the brass, creating an inseparable mechanical lock. This prevents the brass insert from twisting, stripping, or leaking when contractors apply high torque during installation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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    Couplings packed loosely in large sacks often suffer from ovality (becoming out-of-round) under the immense weight of a stacked 40HQ container. We solve this by packing our couplings in heavy-duty polybags, which are then placed into reinforced 5-ply corrugated export cartons<\/b>. This rigid packaging structure absorbs the physical stress of international shipping, ensuring every coupling arrives perfectly round and ready for fusion.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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    Can we emboss our own brand logo and insertion depth lines on the couplings? <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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    Yes, we provide comprehensive OEM services for global distributors. We can customize the injection molds to feature your embossed brand logo<\/b>, the exact pressure rating (e.g., PN25), and standard compliance marks. Additionally, we can include visible insertion depth indicators on the coupling exterior to help your contractors achieve a perfect, standardized weld every time.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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    Is there any variation in quality or wall thickness across massive bulk orders? <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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    To guarantee absolute consistency across massive batches, our production lines utilize fully automated injection molding machines with advanced hot runner systems. Every batch is subjected to random ultrasonic wall-thickness testing and hydrostatic burst tests. We guarantee that the millionth coupling is identical in quality and performance to the very first one.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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    What is the standard lifespan of your couplings in aggressive water environments? <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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    When installed correctly at standard operating parameters (20\u00b0C \/ PN10), our virgin PPR couplings have a design life exceeding 50 years<\/b>. Because the material is exceptionally smooth and chemically inert, it is completely immune to galvanic corrosion, rust, and the severe hard-water scaling that frequently destroys traditional metal couplings.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t