Water tank product quality standards and testing systems are important foundations for ensuring product safety and reliability. Understanding relevant national standards and testing items for water tank products helps users make informed choices when purchasing, and helps construction parties grasp key indicators during acceptance.

SMC FRP Water Tank Related Standards

Main standards for SMC FRP water tanks include: GB/T 17904-1999 (current latest version) "Glass Fiber Reinforced Plastics (FRP) Water Tanks for Building Water Supply" and "Glass Fiber Reinforced Thermosetting Composite Materials" series standards.

Main testing items:

• Tensile strength: ≥60 MPa
• Flexural strength: ≥120 MPa
• Impact strength: ≥80 kJ/m²
• Leakage test: No leakage after 72 hours full water
• Hygiene performance: According to GB/T 17219 Safety Evaluation Standards for Drinking Water Supply and Distribution Equipment and Protective Materials

Enamel Steel Panel Water Tank Related Standards

Implements JB/T 11453 "Enamel Steel Panel Drinking Water Tanks," main testing items:

• Enamel layer adhesion: No peeling in bending test
• Acid resistance (4% acetic acid solution 24h immersion): No discoloration or blistering
• Alkali resistance (0.5% NaOH solution 24h immersion): No appearance changes
• Glaze hardness: ≥Mohs scale 6
• Leakage test: No leakage after 48 hours full water

Stainless Steel Water Tank Related Standards

Mainly implements GB/T 8165 "Stainless Steel Clad Steel Plate" and stainless steel welding specifications; testing items include:

• Panel thickness and specifications: Comply with design drawings
• Weld quality: Appearance inspection + penetrant testing (PT) or ultrasonic testing (UT)
• Water pressure test: 1.5 times working pressure, hold pressure 30 minutes without leakage
• Panel chemical composition: Spectral analysis confirming 304 or 316L material

General Hygiene Performance Requirements

Regardless of material, water tanks for storing domestic drinking water must meet hygiene performance requirements of GB/T 17219, including: turbidity increase value, color increase value, oxygen consumption increase value, heavy metal (lead, arsenic, etc.) migration volume, organic compound migration volume.

Procurement Acceptance Recommendations

When purchasing water tanks, request suppliers to provide: factory quality inspection report (per batch); type inspection report (issued by third-party testing institution, valid within one year); material quality certification documents; sanitary permit (for domestic drinking water use).

All Beijing Yuanhui FRP products pass inspection and certification by national-level testing institutions, with complete quality certification documents available upon request.