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Joint Installation Procedures for HDPE Double‑Wall Corrugated Pipes    1.The rubber ring shall be installed in the groove between the second and third corrugations of the spigot end. The number of sealing rings to be installed shall be determined according to design requirements. When two sealing rings are adopted, it is recommended to leave one corrugation interval between them.   2.Before joint assembly, clean the inner and outer surfaces of the socket and spigot end thoroughly. Fit the sealing ring onto the spigot end, then apply lubricant (ordinary soapy water is sufficient) to the working surface inside the socket and the surface of the rubber ring. Align the pipe with the centerline of the socket in the direction of water flow, then slowly insert the pipe to be installed fully into the socket—either manually or by setting up a wooden baffle and using a crowbar—until it reaches the bottom stop.   3.After the joint assembly is completed, backfill the reserved groove compactly with the same type of soil immediately.   4.For the installation of bell-and-spigot pipes, the spigot end shall face the direction of water flow, the socket shall face against the direction of water flow, and the pipes shall be installed sequentially from the downstream to the upstream.   5.Pipes shall be laid in a straight line, and the allowable deflection angle between the axes of two adjacent pipe sections shall generally not exceed 2 degrees. To prevent the axial displacement of the laid pipes when the joints are closed, pipe stabilization measures must be adopted. Woven bags filled with sand can be used and pressed on top of the laid pipes after sealing; the quantity shall be determined according to the pipe diameter. After pipe joint assembly, the pipe bottom elevation and axis shall be rechecked to ensure compliance with requirements. If displacement, floating or joint pulling occurs, rework shall be carried out immediately.   Besides HDPE double‑wall corrugated pipe, our product portfolio also includes HDPE water supply pipe(PE water supply pipe), PVC water supply pipe, PVC‑U industrial pipe, PVC‑UH water supply pipe, PVC‑UH drainage pipe, PPR pipes, PERT floor heating pipe, PERT‑II thermal pipe and other plastic pipe. Full range of specifications are available. Please visit our official website for complete specifications and technical data. We can offer quotation according to your project requirements.

Shandong, China – To meet growing global demand for corrosion‑resistant industrial plastic piping,Shandong Luyu Plastic has optimized its production lines for PVC‑U industrial and chemical pipes,improving output efficiency and shortening lead time for bulk and project‑based orders.   Our PVC‑U chemical pipes adopt virgin PVC‑U raw material. Every production procedure includes online dimension monitoring and offline sample testing to keep consistent quality. Standard export packaging is applied;custom packing requirements are acceptable.   Besides PVC‑U chemical pipes, our product portfolio also covers PE Water Supply Pipes,PE Double Wall Corrugated Pipe,UPVC Water Supply Pipes,UPVC Chemical Pipe,PVC-M Water Supply Pipes,PVC‑UH pipes,PE-RT Floor Heating Pipes,PE-RTII Insulation Pipe,Hot Water PPR Pipe,Cold Water PPR Pipe,delivering one‑stop plastic‑piping procurement for municipal,industrial and infrastructure projects.   Flexible MOQ is available for global distributors and engineering clients. Feel free to contact us for factory visit arrangement,product samples and formal quotation.

The below installation points apply to both PVC‑U and PVC‑M water supply pipes.   PVC Water Supply Pipe Installation Key Points   Cutting & Preparation: Cut squarely with PVC cutter or fine‑tooth saw. Remove burrs and chamfer pipe end for good sealing.   Jointing: Small‑size pipes use solvent cement. Clean surfaces, apply special PVC cement, insert with 1/4 turn twist, hold in place, wait for full curing before pressure test. Large‑diameter pipes adopt rubber‑ring push‑fit joint, ensure seal ring well‑seated.   Buried Laying: Lay sand bedding in trench, keep away from sharp stones. Backfill with fine sand first to protect pipes. Keep proper burial depth against frost and external load.   Support & Thermal Compensation: Fit pipe clamps at required intervals, add supports at elbows and tees. Install expansion joints for long pipelines to absorb thermal expansion‑contraction.   Pressure Test & Flushing: Carry out hydrostatic test after installation. Flush pipeline thoroughly before commissioning.   Handling & Storage: Handle pipes gently, no dropping. Avoid long‑term direct sunlight exposure during storage.   Our main products cover PE water supply pipes, PE double‑wall corrugated pipes, PVC water supply & drainage pipes, PPR pipes, PERT floor heating pipes, PERT‑II thermal heating pipes and more. Please visit our official website for full product details.

PVC‑U Industrial Pipe (Full name: Unplasticized Polyvinyl Chloride Industrial Pipe) is a rigid thermoplastic anti‑corrosion industrial pipe extruded from non‑plasticized PVC resin as the main raw material, with stabilizers, impact modifiers and other additives incorporated. It complies with national standard GB/T 4219.1‑2008.   Designed for working conditions such as factory acid‑alkali media, circulating water and industrial wastewater, it is a widely‑used acid‑alkali resistant PVC pipe for chemical fluid transportation. Different from civil water‑supply‑and‑drainage PVC pipes, the industrial‑grade formulation features thicker wall, higher pressure resistance and superior anti‑corrosion performance.   Luyu Plastics specializes in the production of PVC‑U industrial pipes. We select high‑quality raw materials and conduct strict testing relying on our in‑house national‑level CNAS‑accredited laboratory. With a complete range of specifications, we can deliver stable and reliable piping solutions for industrial‑wastewater projects. Customers are welcome to make inquiries and visit our factory for business discussions.  

Our national standard PVC-U water supply pipes  are widely adopted for farmland irrigation, rural drinking water renovation and community low-pressure water supply systems, with outstanding comprehensive strengths: Ultra-light weight for easy handling & cutting Much lighter than metal pipes, the pipes are simple to transport and cut on site. Labor construction costs can be reduced by half compared with steel pipelines. Super smooth inner wall, energy-saving & anti-scaling The extremely smooth inner surface minimizes water flow resistance. No mineral scale builds up after long-term operation, lowering power consumption of water pumps effectively. Excellent acid & alkali corrosion resistance Inherently resistant to acid, alkali and saline soil corrosion. Extra anti-corrosion coating treatment is unnecessary even when buried in saline-alkali land. Fast leak-free rubber ring socket connection Flexible rubber ring joint design requires no adhesive during installation, greatly speeding up construction progress while achieving tight, long-term waterproof sealing. Extra Highlights All our PVC pipes adopt lead-free eco-friendly formula, fully compliant with national sanitary standards for potable water. With prominent cost performance, they stand as the top choice for small and medium-scale water supply projects worldwide. Shandong Luyu Plastic supplies complete matching PVC-U water supply pipe fittings for one-stop pipeline procurement, supporting stable bulk export orders for global agricultural and municipal water projects. Upvc Water Supply Tube UPVC water supply pipe Plastic Grey Color Pipe

Three Main Reasons for Extra Glossy Outer Surfaces of PE Water Supply Pipes 1. Harmless & compliant soft gloss (high-quality virgin PE100 pipe) The mild, oily and non-dazzling gloss on standard PE pipes comes from pure virgin PE100 material, high-precision polished molds and a small amount of qualified lubricants. These professional additives only optimize extrusion quality, eliminate pockmarks and ensure uniform plasticization. They do not affect pipe toughness, pressure resistance or drinking water safety. This is the standard surface state of qualified new material pipes. 2. Glaring mirror gloss (inferior filled & recycled pipe) Pipes with extremely bright, mirror-like surface are mostly low-cost products filled with a large proportion of calcium carbonate or talc powder. Manufacturers use fillers and fluorescent brighteners to cover defects of recycled materials. Such pipes have poor toughness, low pressure resistance and unstable welding performance. They sink in water, shed white powder when scratched, and cannot reach the 50-year service life standard, bringing hidden leakage and water safety risks. 3. Abnormal bright surface (process & equipment defective pipe) Partial or over-bright surface can also be caused by unstable production parameters. Excessive vacuum, over-cooling or over-high die temperature will cause instantaneous super cooling and uneven melt flow. This forms an abnormal glossy layer with water ripples and uneven wall thickness, which belongs to unqualified process defective products.   The main products of our company include PE pipe,PVC-U pipe,PVC-M pipe,PE-RT Pipe,PPR pipe and Pipe fittings.

Steady productivity is the core guarantee for overseas export business. Shandong Luyu Plastic owns standardized production workshops and automatic production lines, covering PPR, PE-RT, PVC-UH, PVC-U, HDPE pipes and matched fittings. We realize full independent production from raw material processing to finished packaging. Sufficient raw material inventory and standardized production management can support bulk FCL orders and mixed container orders. No delivery delay risk, stable product quality, competitive factory direct price. We sincerely cooperate with global distributors and importers. Our main product range includes: 1.HDPE Water Supply Pipes 2.HDPE Sewage Pipe 3.UPVC water supply pipe 4.UPVC irrigation pipe 5.PVC-UH Water Pipes 6.PVC-UH sewage pipes 7.PVC-M Water Supply tube 8.PE-RT Pipes and Pert Type II Pipes 9.PPR pipes

Recently, Shandong Luyu Plastic ushered in another export peak. The whole workshop is in full swing, workers orderly inspect, pack and seal plastic pipe products. All cartons are wrapped with waterproof plastic film for moisture-proof protection during long sea transportation. This shipment covers our core export products: PE-RT Type II heating pipes, PVC-U water supply pipe,PVC-UH drainage pipes,Cold and Hot Water PPR Pipes,HDPE pipes and full-range pipe fittings. We stick to strict quality inspection before delivery, to guarantee all goods arrive at destination ports intact. We keep stable production capacity and fast delivery cycle to support global wholesale and engineering orders.   Our company specializes in PE Pipes,PVC Pipes,PE-RT Pipes,PPR Pipes and Fittings.The company offers a wide range of products with extensive applications,covering municipal water supply,fire protection,landscaping,industry,sewage,gas,heating;water conservancy construction,rural drinking water,  agricultural irrigation; building water supply and drainage,electrical conduit,floor heating; high-end home decoration water supply and drainage,floor heating,electrical conduit and other application fields.   

Shandong Luyu Plastic specializes in PE water supply pipes ,PVC-U chemical pipes, PVC-H pipes,PERT pipes,PPR pipes. Made of high-purity rigid PVC, our PVC-U chemical pipes resist acids and alkalis (pH 2–12) at ambient temperature, ideal for chemical wastewater, electroplating solutions and sewage treatment. With smooth inner wall, pressure rating 1.0–1.6MPa, working temperature -5℃ to 45℃ and service life over 50 years. Lightweight and easy to install, they are the reliable choice for industrial corrosion-resistant piping.

Shandong Luyu Plastic specializes in PE water supply pipes ,PVC-U chemical pipes, PVC-H pipes,PERT pipes,PPR pipes. Made of high-purity rigid PVC, our PVC-U chemical pipes resist acids and alkalis (pH 2–12) at ambient temperature, ideal for chemical wastewater, electroplating solutions and sewage treatment. With smooth inner wall, pressure rating 1.0–1.6MPa, working temperature -5℃ to 45℃ and service life over 50 years. Lightweight and easy to install, they are the reliable choice for industrial corrosion-resistant piping.

May 2026, Shandong, China — Amidst a bustling production season, Shandong Luyu Plastic Co., Ltd. is operating at full capacity to fulfill a wave of international orders. The factory floor buzzes with activity as dedicated workers carefully package pipe fittings, preparing large-scale shipments for global clients. Full Steam Ahead for Global Delivery Our production and packaging lines are running non-stop, with teams meticulously preparing orders for export. Every PE water pipe, PVC water pipe, PVC industrial pipe, and corresponding PVC & PE fitting is carefully inspected, packed, and secured with protective plastic film wrapping to ensure full moisture resistance and damage prevention during long ocean transit. Our Core Export Products： PPR Hot & Cold Water Pipe PERT Underfloor Heating Pipe & PE-RT Type II Heating Pipe PVC-UH Water Supply Pipe & PVC-UH Drainage Sewer Pipe  PVC-U Water Supply Pipe PVC Chemical Pipe HDPE Water Supply Pipe Pipe Fittings Looking Ahead With ongoing strong global demand, Luyu Plastic will continue expanding production and export capabilities to support international partners. We welcome new inquiries and cooperation from distributors, contractors, and project developers worldwide.

As urban and rural water supply projects continue to upgrade globally, the demand for durable, efficient and cost-effective piping solutions is surging. Shandong Luyu Plastic Co., Ltd., as a professional manufacturer of plastic pipes, grandly recommends its high-quality PVC-U water supply pipe series, which have become the preferred solution for numerous water conveyance projects around the world. Our UPVC water supply pipes are exquisitely made of high-quality unplasticized polyvinyl chloride (UPVC) raw materials, strictly complying with international standards. Among them, the classic plastic grey color pipe is widely recognized for its sleek appearance, excellent corrosion resistance and strong pressure-bearing capacity, suitable for indoor and outdoor water supply systems. Compared with other pipe materials, our PVC-U water supply pipes have unparalleled advantages: the smooth inner wall significantly reduces water flow resistance and ensures water conveyance efficiency; the high-quality plastic material is non-toxic and odorless, meeting the safety standards for drinking water contact; the lightweight design simplifies the transportation and installation process, greatly reducing project costs and construction periods. As a trusted supplier of PVC pipes, we provide full-specification PVC-U water supply pipes, including plastic grey color pipes, to meet the diverse needs of residential, municipal and industrial water supply projects. All products undergo strict quality inspection before leaving the factory to ensure long service life and stable performance even in harsh environments. "The adherence to quality and innovation has made our UPVC water supply pipes stand out in the global market," said a representative of Shandong Luyu Plastic Co., Ltd. "We will continue to optimize our PVC pipe series and provide more reliable and cost-effective solutions for the water supply needs of global customers." For more details about PVC-U water supply pipes (including PVC-UH water supply pipes, plastic grey color pipes and other PVC pipes), please visit our official website and leave a message, and we will serve you as soon as possible.

Affected by ongoing Middle East regional tensions, global logistics and raw material supply chains face obvious instability, bringing challenges to the delivery of plastic pipes for overseas engineering projects. As a professional PVC-U water supply pipe and HDPE pipe manufacturer, Shandong Luyu Plastic has taken proactive measures to stabilize production and shipment. The company operates at full capacity, optimizes production scheduling, and reserves sufficient raw materials to guarantee orderly production of piping products. All core pipes feature corrosion-resistant, lightweight, non-toxic, anti-aging and easy to install, meeting international water supply and drainage standards. Luyu’s foreign trade team adjusts shipping plans flexibly to offset logistics risks, ensuring on-time delivery for Middle East, Africa and Southeast Asian clients. Despite complex global situations, Shandong Luyu continues to deliver reliable plastic pipe solutions, and sticks to stable supply for municipal, irrigation and construction projects worldwide. Besides PE Water Supply Pipe, we also manufacture a full range of plastic pipeline products, including PE Double Wall Corrugated Pipes,UPVC water supply pipes,PVC chemical pipes,PVC-UH Water Supply Pipe,PVC-UH sewage pipes,PVC-M Water Supply tube,PERT floor heating pipes,PE-RT Type  II Thermal Insulation Pipe,PPR Water Supply Pipes.

DONGYING, SHANDONG – April 2026 – Shandong Luyu Plastic has achieved steady export growth, with plastic pipe shipments increasing 9.6% year-on-year in 2024, benefiting from the booming global infrastructure market. The company’s core export products are well-received by international buyers, thanks to their cost-effectiveness and long service life. Key export markets include Southeast Asia, where PPR pipes are in high demand for residential construction; the Middle East and Africa, which need large quantities of HDPE water pipes and PVC irrigation pipes for government water projects; and Central Asia, where PE gas pipes are widely used for utility upgrades. Luyu provides custom solutions, including different diameters and pressure ratings, to meet diverse project needs.   Equipped with 60 extrusion lines and 40 injection machines, Luyu ensures efficient production and on-time delivery. The export manager stated, “Our goal is to become a trusted plastic pipe supplier for global customers, offering one-stop solutions from product design to after-sales service.”

DONGYING, CHINA – April 2026 – Shandong Luyu Plastic Co., Ltd., a professional plastic pipe manufacturer based in Shandong, China, is further expanding its global reach by providing high-performancePE pipes, PVC pipes and PPR pipes to international markets. Luyu has built two industrial parks covering 220 acres, with an annual production capacity of 150,000 metric tons, making it a key player in China’s plastic pipe industry. The company’s product range includes HDPE pipes for municipal water supply and gas transmission,UPVC pipes for drainage systems, PPR pipes for residential hot and cold water, and PE-RT pipes for underfloor heating. All products are ISO-certified, complying with international standards, and have been widely used in infrastructure, construction and agricultural projects across 60+ countries in Southeast Asia, the Middle East and Africa.   “We focus on quality and reliability to meet global demand for durable plastic piping solutions,” said a company spokesperson. As a high-tech enterprise in Shandong, Luyu holds 13 patents in plastic processing, ensuring stable supply and premium product performance for global partners.

We are an integrated manufacturing enterprise with independent R&D team and self-owned factory,specializing in the production of full-series plastic pipes. Our main product range covers: ✅ PE water supply pipes,PE double wall corrugated pipes; ✅ PVC series pipes: PVC-M,UPVC,PVC-UH water supply pipes and PVC-UH sewage drainage pipes; ✅ PPR cold water pipes & PPR hot water pipes for household plumbing; ✅ PERT floor heating pipes and PERT Type Ⅱ thermal insulation heating pipes. We support complete specifications with production diameter from 20mm to 1200mm. Customized size,pressure grade,color and project-oriented pipes are all available. All products comply with international quality standards,featuring high pressure resistance,corrosion resistance and long service life,widely used in municipal water conservancy,urban water supply,sewage drainage,farmland irrigation,residential heating and thermal engineering projects. We warmly welcome global customers to inquire about products,request samples and visit our factory for long-term cooperation.

About Us Shandong Luyu Group is a leading industrial conglomerate headquartered in Dongying City, Shandong Province, China. With core businesses covering plastic pipes, non-woven materials, and related equipment manufacturing, the group integrates R&D, production, sales, and service into a one-stop synergistic operation model, achieving strategic industrial coordination effects. As a core subsidiary of Shandong Luyu Group, Shandong Luyu Plastic Co., Ltd.specializing in the R&D and production of various plastic pipes. With a registered capital of 105 million RMB and a total factory area exceeding 133,333 square meters (200 mu), we operate two industrial parks equipped with 60 pipe production lines and 40 pipe fitting injection molding machines. Our product range covers diameters from 16mm to 1200mm, with an annual production capacity of 150,000 tons. We are recognized as one of the top manufacturers in China's plastic pipe industry in terms of production and sales volume, ranking among the forefront in comprehensive strength. Committed to providing high-quality products and professional services to global clients, our business spans key sectors including municipal infrastructure, agriculture, and construction. Our products have been exported to more than 50 countries and regions across Europe, Southeast Asia, the Middle East, Africa, and South America, establishing long-term stable cooperative relationships with local distributors, engineering companies, municipal authorities, and industrial enterprises.

About Us Shandong Luyu Group is a leading industrial conglomerate headquartered in Dongying City, Shandong Province, China. With core businesses covering plastic pipes, non-woven materials, and related equipment manufacturing, the group integrates R&D, production, sales, and service into a one-stop synergistic operation model, achieving strategic industrial coordination effects. As a core subsidiary of Shandong Luyu Group, Shandong Luyu Plastic Co., Ltd.specializing in the R&D and production of various plastic pipes. With a registered capital of 105 million RMB and a total factory area exceeding 133,333 square meters (200 mu), we operate two industrial parks equipped with 60 pipe production lines and 40 pipe fitting injection molding machines. Our product range covers diameters from 16mm to 1200mm, with an annual production capacity of 150,000 tons. We are recognized as one of the top manufacturers in China's plastic pipe industry in terms of production and sales volume, ranking among the forefront in comprehensive strength. Committed to providing high-quality products and professional services to global clients, our business spans key sectors including municipal infrastructure, agriculture, and construction. Our products have been exported to more than 50 countries and regions across Europe, Southeast Asia, the Middle East, Africa, and South America, establishing long-term stable cooperative relationships with local distributors, engineering companies, municipal authorities, and industrial enterprises.

I. Strong Pressure Bearing Capacity   As a new type of innovative water supply pipe, PVC-UH pipe features high strength and high pressure resistance, with good resistance to internal and external pressure. It can withstand high-intensity water flow impact, which is crucial in water conservancy construction.   II. Excellent Toughness and High Tensile Strength   Compared with pipes of other materials, PVC-UH pipes have more than 40% higher ring flexibility. They offer better resistance to external impact, accommodate material stress relief caused by temperature changes inside the pipe, and adapt to water conservancy projects under different conditions and locations.   III. Simple and Reliable Connection Method   PVC-UH high-performance polyvinyl chloride pipes have improved mechanical properties on the basis of traditional PVC-U and PVC-M pipes, with optimized connection methods. They adopt either adhesive bonding or elastic sealing ring connection, enabling easy, secure installation and fast construction.   IV. Safety and Hygiene   At present, the country advocates the construction of sponge cities and promotes the development of urban underground utility tunnels, where safety and hygiene are top priorities for urban water supply. PVC-UH pipes are manufactured with a lead-free formula to ensure the safety of conveyed water quality.   V. Low Cost and High Cost Performance   PVC-UH pipes have a smooth inner wall with a roughness coefficient of only 0.009, resulting in low fluid resistance and reduced system operating costs. In addition, the designed service life of the pipeline system is no less than 50 years with low maintenance costs, making it more suitable for water conservancy projects.   PVC-UH pipes are available in two categories: PVC-UH pipes for water supply PVC-UH low-pressure pipes for sewage and drainage

Luyu Plastic: Full Production Resumes After Chinese Lunar New Year At the start of the Chinese Lunar New Year, all production workshops of Shandong Luyu Plastic Co., Ltd. are fully operational. Machinery roars on the production lines of PE water supply pipes, PE sewage pipes, PVC water supply pipes, PVC drainage pipes, PPR pipes, PE-RT pipes, PE pipe fittings, PVC pipe fittings and PVC-PPR pipe fittings, with workers busy working to ensure the timely, high-quality and sufficient supply of engineering pipes for customers.