PVC Pipe Workshop
Product Overview
CPVC Pipe Fittings Blind Flanges (End Caps) are manufactured from high-purity chlorinated polyvinyl chloride (CPVC) in compliance with GB/T 18993.2 standards. Available in nominal diameters ranging from 20 to 110 mm, with a working pressure ≤1.6MPa and sealing surface flatness tolerance ≤0.02mm. They are designed to seal matching CPVC pipe ends, with a temperature resistance range of -40°C to 90°C, ensuring reliable temporary or permanent sealing for piping systems.
Fitting Characteristics
Compressive strength ≥60MPa, impact resistance ≥9kJ/m², withstands corrosion from 95% nitric acid and 30% sodium hydroxide solutions. Sealing leakage rate <1×10⁻⁶Pa·m³/s, oxygen index ≥40% achieving B1 flame retardant rating. Weighs only 1/5 of steel plugs of equivalent specifications. Features a smooth, impurity-free inner wall with no metal ion leaching, eliminating loosening risks post-installation.
Manufacturing Process
Utilizes CPVC resin with polymerization degree ≥1000, precision injection molded at 195-215°C. Sealing surfaces undergo mirror polishing (roughness Ra ≤0.8μm). Segmented cooling and setting at 25-35°C. Each batch undergoes sampling for 1.8 times nominal pressure hydrostatic testing (30-minute pressure retention with zero leakage). Dimensions verified via caliper inspection (±0.03mm tolerance) before packaging.
Application Scenarios
Chemical Pipeline Systems: Seals temporary ports on CPVC chemical pipes, withstands acid/alkali corrosion, provides reliable sealing at 1.6MPa pressure to prevent chemical leakage and ensure production safety.
Pharmaceutical Pipeline Maintenance: Used for port sealing during CPVC pharmaceutical pipeline repairs, complies with GB/T 17219 sanitary standards, free from metallic contamination to safeguard pharmaceutical production cleanliness.
Electronic Ultra-Pure Water Systems: Seals unused ports in CPVC ultra-pure water pipelines. Low contamination and no leaching prevent impurities from entering pipes, meeting electronic production water quality requirements.
Electroplating Waste Liquid Treatment: Seals standby ports in CPVC waste liquid pipelines. Resists strong corrosion with leak-proof sealing to prevent waste liquid seepage, supporting stable electroplating wastewater treatment systems.
Construction Industrial Piping: Used for temporary sealing during CPVC industrial piping installation in buildings. Withstands temperatures from -40°C to 90°C, preventing impurities from entering pipes during construction and affecting subsequent use.
Usage Precautions
Before installation, inspect the sealing surface for flatness and remove surface dust and burrs. Apply CPVC-specific sealing compound (0.1-0.2mm thickness) when connecting to pipes to ensure tight adhesion. Do not use above 90°C or 1.6MPa. For long-term sealing, inspect the seal condition every 6 months and replace immediately if aging is detected. Avoid forceful prying during removal to prevent damage to pipe ports.
Our customization services cover every aspect of your needs, including color options, spray codes, brass materials, fitting molds, functionality, brand logos, and packaging.
Our piping systems are developed together with you, based on your performance targets or design goals, to ensure the final product delivers both technical consistency and aesthetic appeal—across every stage of production.
We have our own production workshops and warehouses, equipped with complete production and quality inspection equipment.
FRP composite pipe
Product Showroom
Pipeline storage area 
Pipe fittings storage area 
CNAS laboratory 
SZNY proudly stands as a trusted partner to globally renowned pipeline suppliers and leading brands. Our products reach over 80 countries and regions worldwide, backed by a robust domestic network of distributors and sales points across China, ensuring comprehensive product availability and full-service support.
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Providing users with safe, durable, and intelligent industrial piping systems
