SIFFO is a leading manufacturer specializing in high-performance plastic piping systems, dedicated to providing safe, durable, and eco-friendly UPVC water supply pipes for global clients. With advanced production technology, stringent quality control, and exceptional customer service, SIFFO has become a trusted brand in the industry, serving municipal, construction, agricultural, and industrial applications.

SIFFO ASTM D1785 is a standard specification for polyvinyl chloride (PVC) plastic pipes, specifically designed for pressure applications such as water supply, irrigation, and industrial piping systems. UPVC (Unplasticized Polyvinyl Chloride) pipes under this standard are known for their rigidity, durability, and resistance to corrosion and chemicals. These pipes are widely used in municipal water supply, building drainage, and industrial fluid transportation due to their excellent mechanical properties and long service life. Their core characteristics include:

Hygienic & Safe for Potable Water: Certified for drinking water, the smooth, non-migrating interior inhibits bacterial growth and biofilm formation, helping to improve water quality by reducing bacterial counts by more than 60%.

Outstanding Mechanical Strength: Offering 1.5 times the pressure resistance of conventional PVC, our pipes ensure reliable operation under high-pressure conditions (e.g., 1.6MPa) with minimal maintenance needs.

Exceptional Corrosion Resistance: Formulated with non-lead stabilizers, our pipes withstand acids, alkalis, salts, and organic solvents. Proven in harsh conditions, such as high-acidity wastewater lines, they show no corrosion or leakage after years of service, far outlasting traditional metal pipes.

High Fluid Efficiency: The ultra-smooth interior (friction coefficient: 0.009) enhances flow capacity by up to 30% versus cast iron. This ensures superior drainage efficiency, preventing water accumulation and structural damage.

Lightweight & Cost-Effective Installation: At only 1/5 the density of iron, our pipes reduce handling and installation time by up to 60%, lowering overall project costs significantly.

Long Service Life & Low Maintenance: Designed for over 50 years of use, our pipes feature UV and aging resistance. Real-world installations show less than 5% performance degradation after 20 years, reducing lifecycle maintenance costs by over 40%.

Fully Recyclable & Sustainable: We support a circular economy—100% of pipe material can be recycled. Pipes made from recycled content meet the same performance standards as new ones while reducing carbon footprint by 28% per kilometer.

Flame Retardant & Safe: With an oxygen index ≥45, the pipes are self-extinguishing within seconds upon flame removal, enhancing fire safety and helping to contain hazards.

ASTM D1785 UPVC Pipe Specifications

Material：   UPVC (Unplasticized Polyvinyl Chloride)

Connection Methods: Rubber Ring Socket Joint,Solvent cement jointing

Size Range：1/2inch to 24inch

Standard: ASTM D1785 – Standard specification for PVC plastic pipes, Schedule 40, 80, and 120

Operating Temperature：-20°C ~ +70°C

Color：Grey,Blue, White,Green (custom colors also are available)

Application Fields

Municipal Water Supply and Drainage Systems

Municipal Water Supply Networks: With excellent hygienic performance, corrosion resistance, and long service life, they are widely used in main urban water supply pipes, branch networks, and direct drinking water systems to ensure safe and stable water quality.

Drainage and Sewage Treatment: High corrosion resistance and a smooth inner wall make them ideal for sewage and rainwater discharge and sewage treatment plant piping, especially suitable for conveying industrial wastewater and domestic sewage.

Industrial Piping Engineering

Chemical and Electronic Industries: Excellent resistance to acid, alkali, and solvent corrosion makes them perfectly suited for process wastewater, exhaust gas emissions, and chemical media transportation pipelines in chemical plants, electronics factories, and electroplating plants.

Industrial Park Piping Networks: High compressive strength and durability meet the needs of centralized water supply, circulating water systems, and high-pressure water supply networks within industrial parks.

Building Construction

Building Water Supply and Drainage: Lightweight, easy to install, and flame-retardant, making it widely used in indoor and outdoor water supply, drainage, and rainwater systems of high-rise buildings, residential communities, and commercial complexes.

Fire Sprinkler Systems (Specific Certified Products): Products that meet flame-retardant standards and have strong pressure resistance, suitable for branch pipes and other parts of fire sprinkler systems.

Agricultural Irrigation and Water Conservancy Applications

Water-Saving Irrigation Pipelines: Smooth inner walls and low hydraulic loss facilitate long-distance water transport and efficient water-saving irrigation, suitable for water supply pipelines in greenhouses, farmland, and orchards.

Ventilation and Cable Protection

Building Ventilation Ducts: Excellent flame-retardant and self-extinguishing properties, suitable for ventilation and exhaust ducts in basements, parking lots, and commercial buildings.

Cable Protection Conduits: Corrosion resistant, with good insulation and high strength, commonly used for underground or exposed protection conduits for power and communication cables.