| Customization: | Available |
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| Material: | PVC |
| Hardness: | Hard Tube |
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Crafted with precision, the high-performance rigid PVC-UH water supply pipes from Hebei Anduan Technology Industry Co., Ltd. redefine quality in water supply solutions. These pipes, meticulously fabricated from polyvinyl chloride polymer materials infused with essential additives, boast a robust MRS of ≥ 25Mpa. Utilizing cutting-edge extrusion and molding techniques, these innovative pipes not only uphold but enhance the mechanical properties of traditional PVC-U and PVC-M pipes, setting a new benchmark in water supply technology.
Our PVC-UH water supply pipes are a marvel of engineering, sculpted by redefining the molecular chain structure of polyvinyl chloride. This advancement endows the pipes with exceptional strength and a remarkable capacity to withstand high pressure, both internally and externally. With superior ring stiffness and a unique blend of toughness and flexibility, these pipes excel in pipe gallery installations. Their resilience against impact and adaptability to temperature-induced stress ensure longevity and reliability. Moreover, the pipes feature built-in plastic inspection wells that offer unparalleled sealing performance, assuring a leak-proof system. The streamlined installation process and swift construction, paired with low maintenance costs, highlight the economic efficiency of our pipes. Designed to last over 50 years, these pipes promise an investment that combines minimal risk with high returns, making them a paragon of cost-effectiveness.
| NO | item | technical specification |
| 1 | density (kg/m3) | 1350~1460 |
| 2 | Vicat softening temperature /ºC | ≥80 |
| 3 | Vertical retraction rate/ (%) | ≤5 |
| 4 | dipping test (15ºC,15min) | Surface change is not inferior to 4N |
| 5 | Drop weight impact test(0ºC)TIR/(%) | TIR≤5 |
| 6 | hydrostatic strength | No rupture, no leakage |
| 7 | Suitability (connection seal test, deflection test, negative pressure test) | No rupture, no leakage |
PVC-UH Water Supply Pipe: Trench Excavation Standards & Optimal Soil Backfilling Quality
1. Trench Excavation: Adherence to Premier Standards
To avert complications from pipelines being placed in permafrost zones, it's imperative to gauge trench excavation depth meticulously, leveraging comprehensive local insights. This ensures that when backfilling is executed and tamped as per protocols, it mitigates any risk of pipeline and interface fractures from bending stress. Thus, it is essential that:
(1) The trench must maintain a straight alignment. The base width of the trench should exceed the pipe's outer diameter by at least 0.5m, with an overall width of no less than 0.7m.
(2) Precision in controlling the trench's groove depth is crucial; deviations cannot be tolerated. Should excessive gravel depth occur, it must be backfilled and solidified to the prescribed depth. In terrains with hard soil or where obstructions like stones are present, construction can be challenging. Workers might carve trenches into curves or small radius bends, jeopardizing trench depth. These scenarios can induce pipe bending, subjecting pipes, fittings, and joint sockets to bending stress. Increased water supply and pressure exacerbate risks, potentially leading to joint leaks or rupture of pipes and fittings.
2. Prevent Permafrost Foundation & Avoid Pipe Trench Settlement: For winter constructions, ensuring that the pipe trench bottom sits on undisturbed soil or a compacted surface after backfilling and grooving is critical. If soil moisture is high and the foundation lacks density, subsequent temperature rises can melt permafrost, causing trench foundation sinking. This can lead to pipe subsidence, bending, or joint breakage, introducing additional stress. In minor cases, joints may simply leak; in severe cases, pipes can burst.
3. Winter Pipeline Bonding: Regulatory Compliance Required
The PVC-UH pipe adhesive primarily comprises PVC-UH solvent. Its binding process involves applying adhesive on both the socket's inner and outer surfaces, which causes the PVC-UH-polyurethane tube surfaces to expand or dissolve. During socket insertion, extrusion pressure melds the two expanded surfaces into a seamless unit. The volatile adhesive solvent solidifies post-volatilization, restoring the shallow surfaces to their original hard state, thereby ensuring the bonding strength aligns with pressure-bearing requisites.
Adhesive application must strike a delicate balance: too little compromises sealing and strength, too much may overflow, corroding or softening the pipe walls. This softening can result in cracks upon water or pressure application. Cold weather exacerbates risks, as low temperatures decelerate adhesive volatilization, deepening pipe wall penetration, markedly diminishing strength.
Adherence to construction specifications is paramount when bonding pipes. The adhesive quantity should be calibrated to allow minor overflow at the edge when the socket is fully inserted, which should be promptly wiped clean with a cloth. Glue application within the socket should proceed from the inside out, averting adhesive intrusion into the pipe or fitting's inner walls.
4. Addressing Thermal Expansion & Contraction of Pipes
PVC-UH water supply pipes possess a thermal expansion coefficient of 0.07 mm (m·ºC), surpassing traditional pipe values. It is crucial to consider longitudinal deformation from temperature variations, especially in systems using surface water sources.
The challenge with the scalability of rubber ring connecting pipe interfaces is mitigated by their inherent flexibility. This flexibility ensures that concerns related to expansion or contraction are negligible. However, rigidly bonded pipes, especially when open, do not share this advantage. Post-bonding, these interfaces lose any capacity for expansion or contraction. Consequently, without an expansion joint, the stress induced by thermal expansion or contraction becomes a significant issue, exerting immense pressure on the pipe itself or its fittings. Addressing this is crucial for maintaining the integrity and longevity of the installation.
The realm of pipe connection techniques is diverse and adaptable, accommodating various methodologies to ensure optimal system performance. The primary methods include solvent adhesive bonding, elastic sealing ring integration, and unified rubber ring connections. Moreover, the versatility of these methods allows for seamless connection to alternative pipe types, such as robust cast iron pipes, through the use of strategically chosen flanges or other compatible adapters. This adaptability ensures that your piping system remains both flexible and resilient, capable of meeting diverse installation needs while maintaining durability and efficiency.
Connection Procedure: Begin by meticulously cleaning the working surface, ensuring it is free of debris and contaminants. Next, apply a thin, even coat of lubricant to facilitate smooth insertion. Finally, proceed with precise alignment and counterpart insertion, guaranteeing a secure and reliable connection that upholds the integrity of the system.
1. Prior to installation, it is pivotal to conduct a thorough examination of the quality of all pipes, fittings, and rubber rings. Additionally, ensure the complete removal of any debris from the working surface of both the socket and socket connection points. This meticulous preparation step is essential for achieving a flawless and secure installation.
2. During pipe installation, it is standard practice for the socket to be oriented in the direction from which the water is incoming. This orientation is critical for ensuring optimal flow and functionality within the piping system.
3. The application of lubricant to the rubber ring and insertion section must be approached with precision. Adequate lubricant application prevents undesirable flow into the socket groove, which could otherwise increase friction and risk overturning the rubber ring. Detergent and soapy water serve as the preferred lubricant agents, providing the necessary lubrication without compromising the integrity of the rubber ring or the socket groove wall.
4. Ensure that socket ports are impeccably aligned, maintaining a straight pipeline axis. This alignment is crucial for seamless connectivity and optimal performance, preventing any misalignment that could compromise the system.
5. Employ appropriate wire rope sleeves on each side of the socket, ensuring these are securely drawn into the reticle using a tightener or hand wrench. For medium-caliber pipes, consider using square wood to pad the port, and carefully drive it into the socket using a mallet. This approach ensures a robust and secure connection, enhancing the stability and durability of the entire piping system.
1,What's your minimum order quantity?
Our minimum order quantity is usually 1 CTN.
2,How long is the delivery cycle?
The delivery time is approximately 15 - 20 days. (If the quantity is less than 10 cartons, it will take about 3 - 5 days.)
3,Where is the port of shipment?
We ship the goods via Tianjin Port.
4,What are your payment terms?
We accept 30% telegraphic transfer as advance payment, 70% payment during the shipment period or 100% letter of credit.
5,How can I contact you?
You can contact us through the trade manager or click on "Contact Supplier" at the bottom to send us an email.
6,Where is your company located?
Our company is located in Cangzhou, Hebei Province, China. You are very welcome to visit us if you'd like.
7,How about the samples?
We can send samples to you. Most samples can be sent to most parts of China for free. If they are sent to other countries, the transportation cost should be borne by your side.
8,Why choose us?
Our products are genuine, of high quality and with competitive prices.
We have cooperated with customers all over the world and have a good understanding of the market.
You will be very satisfied with our after-sales service.
Any questions and feedback will be replied to within a very short time.
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