Product Overview

DAMEI Valve & Pipe Powder Coating is a specialized heavy-duty anticorrosive formulation designed for industrial valves, pipelines, and piping components subjected to harsh chemical, moisture, and environmental conditions. Our advanced resin technology provides exceptional corrosion protection, ensuring decades of reliable service in critical industrial applications.

Industrial valves and pipes face extreme challenges: chemical exposure, underground burial, high humidity, temperature cycling, and mechanical stress. Standard coatings fail prematurely, leading to costly maintenance, leaks, contamination, and system shutdowns. DAMEI's specialized formulations deliver proven performance:

Three Specialized Grades Available:

1. Drinking Water Grade (Potable Water Systems)

• NSF/ANSI 61 compliant for drinking water contact
• No leaching of harmful substances
• Safe for municipal water systems
• Suitable for water treatment plants

2. Fire Protection Grade (Fire Sprinkler Systems)

• Modified epoxy for internal/external coating
• Excellent water immersion resistance
• Available in fire protection red
• Compatible with EPDM gaskets

3. Mining Antistatic Grade (Explosive Atmospheres)

• Surface conductivity: 10³-10⁷ Ω (antistatic)
• Prevents static electricity buildup
• Safe for coal mines and explosive environments
• Meets mining industry safety standards

Universal Performance Features:
- ✓ Superior corrosion resistance: >1000 hours salt spray
- ✓ Excellent chemical resistance to acids, alkalis, solvents
- ✓ Outstanding mechanical properties (impact, flexibility, adhesion)
- ✓ Wide color range including custom color matching
- ✓ Fast curing for high-volume production
- ✓ Suitable for complex valve geometries

Key Features & Benefits

✓ Heavy-Duty Anticorrosive Formulation

Engineered with premium anticorrosive pigments and high-performance resins:
- Zinc phosphate pigments - Active corrosion inhibition
- Micaceous iron oxide - Barrier protection against moisture
- High crosslink density resins - Impermeable protective film
- Epoxy or polyester base - Optimized for application requirements
- Salt spray resistance: >1000 hours (some grades >2000 hours)

✓ Excellent Chemical Resistance

Withstands exposure to aggressive chemicals commonly found in industrial piping:
- Acids: Sulfuric, hydrochloric, phosphoric (mild to moderate concentrations)
- Alkalis: Sodium hydroxide, potassium hydroxide solutions
- Solvents: Alcohols, ketones, esters (limited exposure)
- Water: Fresh, brackish, seawater (continuous immersion approved)
- Oils & Fuels: Mineral oils, hydraulic fluids, diesel fuel

✓ Superior Mechanical Properties

Critical for valves subjected to installation and operational stresses:
- Impact Resistance: 50 kg·cm (withstands installation impacts)
- Adhesion: Grade 0 (ISO 2409) - no delamination under stress
- Flexibility: Pass 1T bend test (accommodates thermal expansion)
- Hardness: >2H pencil hardness (scratch and abrasion resistant)
- Thermal Stability: No degradation from -20°C to +120°C operating range

✓ Optimized for Complex Valve Geometries

Valve bodies have intricate shapes with recesses, threads, and sealing surfaces:
- Excellent edge coverage on sharp edges and corners
- Faraday cage penetration into recessed areas
- Uniform film thickness even on complex 3D surfaces
- Minimal orange peel for smooth, professional appearance
- Good flow properties for self-leveling on irregular surfaces

✓ Antistatic Grade for Mining Applications

Specialized formulation prevents dangerous static electricity buildup:
- Surface Resistivity: 10³-10⁷ Ω (controlled conductivity)
- Prevents Spark Generation: Critical in explosive atmospheres
- Permanent Antistatic Properties: Does not degrade over time
- Coal Mine Approved: Meets mining safety standards
- Applications: Mining pipes, mine water pumps, ventilation ductwork

✓ Drinking Water Grade for Potable Systems

Certified safe for drinking water contact:
- NSF/ANSI 61 certified (optional, upon request)
- No Heavy Metals: Lead-free, cadmium-free formulation
- No Leaching: Will not contaminate potable water
- Taste & Odor Free: No impact on water quality
- Applications: Water treatment valves, distribution pipes, pumping stations

Technical Specifications (Based on Product Catalog Data)

Note: All specifications based on DAMEI actual product catalog data for valve and pipe powder coating.

Application Areas by Grade

Drinking Water Grade Applications

Municipal Water Systems:
- Gate valves, butterfly valves, check valves
- Water distribution pipelines
- Pump station piping and valves
- Water treatment plant equipment

Water Treatment Facilities:
- Filter valves and piping
- Chemical dosing system pipes
- Backwash system components
- Clearwell storage tank piping

Building Plumbing (Commercial):
- Main water supply valves
- Pressure reducing valves
- Backflow prevention devices
- Hot water system piping

Advantages:
- Complies with drinking water safety regulations
- No taste or odor impact on water
- Long service life (20-30 years)
- Reduces maintenance and replacement costs

Fire Protection Grade Applications

Fire Sprinkler Systems:
- Fire sprinkler control valves (OS&Y, PIV, butterfly)
- Alarm check valves
- Dry pipe valves
- Deluge valves and pre-action valves

Standpipe & Hose Systems:
- Standpipe valves and connections
- Fire department connections (FDC)
- Hose valves and cabinets
- Pressure reducing valves

Fire Pump Systems:
- Fire pump suction and discharge piping
- Control valves on pump systems
- Jockey pump piping
- Fire water storage tank valves

Advantages:
- Fire protection red color for code compliance
- Excellent water immersion resistance
- Internal and external coating capability
- Proven 20+ year service life

Mining Antistatic Grade Applications

Coal Mining Operations:
- Mine water drainage pipes
- Dewatering pump systems
- Ventilation ductwork valves
- Compressed air distribution

Explosive Atmosphere Environments:
- Chemical plant piping in hazardous zones
- Grain elevator dust collection systems
- Paint booth exhaust ductwork
- Pharmaceutical manufacturing piping

Advantages:
- Prevents static electricity spark generation
- Reduces risk of dust explosion or gas ignition
- Permanent antistatic properties
- Meets mining safety certifications

General Industrial Applications

Chemical Processing:
- Process piping and valves
- Storage tank inlet/outlet valves
- Chemical transfer lines
- Wastewater treatment piping

Oil & Gas:
- Wellhead valves
- Pipeline valves (above ground)
- Tank farm piping
- Compressor station piping

Power Generation:
- Cooling water system valves
- Condensate piping
- Auxiliary system piping
- Steam system valves (with temperature limitations)

HVAC Systems:
- Chilled water valves and piping
- Hot water heating system valves
- Condenser water piping
- Control valves

Why Industrial Valve Manufacturers Choose DAMEI

Challenge 1: Corrosion in Buried Valves

Problem: Underground valves face severe soil corrosion, moisture, and stray electrical currents. Standard coatings fail within 5-10 years, requiring expensive excavation and replacement.

DAMEI Solution: Heavy-duty anticorrosive formulation with zinc phosphate and micaceous iron oxide provides >1000 hours salt spray resistance. Real-world performance shows 20-30 year service life in buried applications with proper surface preparation.

Challenge 2: Chemical Attack in Process Systems

Problem: Valves in chemical plants face continuous exposure to acids, alkalis, and solvents. Standard coatings blister, crack, and delaminate, leading to valve body corrosion.

DAMEI Solution: Chemical-resistant epoxy or hybrid formulation withstands exposure to common industrial chemicals. 24-hour immersion testing in 3% acid and alkali solutions shows no degradation. Solvent resistance suitable for limited exposure applications.

Challenge 3: Coating Complex Valve Geometries

Problem: Valve bodies have deep recesses, threaded connections, and seating surfaces. Standard powders leave thin spots or bare areas that corrode first.

DAMEI Solution: Optimized particle size distribution and charging characteristics ensure excellent Faraday cage penetration. Uniform 60-80μm coating even in recessed bonnet areas, stem threads, and flange faces.

Challenge 4: Static Electricity in Mining Applications

Problem: Standard non-conductive coatings on mining pipes and valves can accumulate static charge, creating spark ignition risk in coal dust or methane atmospheres.

DAMEI Solution: Specialized antistatic grade powder with controlled surface conductivity (10³-10⁷ Ω) safely dissipates static charge. Permanent antistatic properties meet coal mine safety standards. Used in thousands of mines with zero static-related incidents.

Challenge 5: Drinking Water Safety Certification

Problem: Valves and pipes in potable water systems require certified non-toxic coatings. Standard industrial coatings may leach harmful substances into drinking water.

DAMEI Solution: Special drinking water grade formulation with NSF/ANSI 61 certification (optional). Lead-free, cadmium-free composition with verified zero leaching. Safe for lifelong drinking water contact.

Application Process Guidelines

Surface Preparation - Critical for Valve Coating

1: Degreasing
Remove all machining oils, cutting fluids, and protective coatings:
- Hot Alkaline Degreasing: 60-80°C immersion or spray
- Ultrasonic Cleaning: For complex valve internals (optional)
- Multi-Stage Rinse: Hot water rinse, then cold water rinse
- Verification: Water break test (no beading = oil-free surface)

2: Rust & Scale Removal
Complete removal of all surface contaminants:
- Preferred Method: Abrasive blasting to Sa 2.5 surface cleanliness
- Alternative: Chemical pickling (for cast iron valves)
- Remove Casting Defects: Grind any surface irregularities
- Clean Internal Passages: Ensure all valve cavities are cleaned

3: Conversion Coating (Phosphating)
Essential for maximum corrosion protection:
- Zinc Phosphate (strongly recommended): 3.0-5.0 g/m² coating weight
- Best corrosion resistance
- Ideal for buried or immersed valves

• Iron Phosphate (acceptable): 1.0-2.0 g/m²
• Good adhesion
• Suitable for indoor or protected environments
• Process: Immersion or spray phosphating
• Rinse: Thorough multi-stage rinsing to remove all phosphating chemicals
• Quality Check: Uniform gray crystal structure, no bare spots

4: Drying
Complete moisture removal before powder coating:
- Oven Drying: 120-150°C for 15-20 minutes
- Forced Air Drying: For large valves that don't fit in oven
- Verification: No water spotting or moisture in valve cavities
- Cool to Touch: 40-60°C before powder application

Powder Application for Valves

Equipment & Setup:
- Corona Charging Gun: Most common for valve coating
- Tribo Charging Gun: Alternative for Faraday cage penetration
- Multiple Application Angles: Necessary for complete coverage
- Proper Grounding: Critical - verify <1MΩ resistance to ground
- Reclaim System: For powder recovery and recycling

Application Parameters:

Application Technique:
1. First Pass: Overall coverage of main valve body
2. Second Pass: Focus on bonnet, recesses, internal areas
3. Third Pass: Threads, flange faces, small details
4. Fourth Pass: Touch-up any thin spots or bare areas
5. Target Thickness: 60-80 μm standard, 80-120 μm heavy-duty

Critical Areas Requiring Special Attention:
- Bonnet and body junction recesses
- Stem threads (if coating threaded area)
- Flange bolt hole interiors
- Valve cavity and seat area (if coating internally)
- Behind hand wheel or actuator mounting lugs
- Sharp edges and corners

Curing Process

Standard Cure Cycle:
- Preheat: Gradual temperature increase to prevent thermal shock
- Cure Temperature: 180-200°C (object temperature, not air temperature)
- Cure Time: 10-15 minutes at temperature
- Dwell Time: Additional 2-3 minutes to ensure complete cure
- Cooling: Natural air cooling or controlled cooling

Oven Configuration:
- Type: Convection oven (gas or electric)
- Temperature Uniformity: ±5°C maximum variation
- Air Circulation: Adequate for even heat distribution
- Loading: Proper spacing between valves for air flow
- Temperature Monitoring: Continuous recording recommended

Cure Verification Methods:
- MEK Double Rub Test: No coating removal or softening
- Crosshatch Adhesion Test: Grade 0-1 required
- Visual Inspection: Uniform gloss, no soft spots, no wrinkles
- Film Thickness: Verify 60-80 μm (or spec thickness)
- Cut Sample: For critical applications, section a test valve

Available Colors & Finishes

Standard Industrial Colors

Most Common Valve Colors:
- Black: RAL 9005 - Most popular for oil & gas valves
- Blue: RAL 5015, RAL 5010 - Water system identification
- Red: RAL 3000, RAL 3009 - Fire protection systems
- Green: RAL 6029, RAL 6032 - Chemical systems
- Gray: RAL 7035, RAL 7037 - General industrial
- Yellow: RAL 1021, RAL 1023 - Gas systems, caution

Custom Color Matching

• RAL Color System: All 200+ RAL Classic colors available
• Pantone Matching: Match to Pantone color references
• Customer Sample: Match to your physical sample (ΔE <1.0)
• Industry Standards: Match to specific industry color codes
• Minimum Order: 200 kg for custom colors

Finish Options

• Semi-Gloss (40-60%): Standard for industrial valves
• High Gloss (70-90%): For decorative or architectural applications
• Matte (10-30%): For non-reflective surfaces

Special Effect Finishes (Optional)

• Metallic: Silver, bronze, copper metallic finishes
• Textured: Fine texture for surface imperfection masking
• Wrinkle: Decorative wrinkle finish for art valves

Quality Assurance & Testing

Incoming Valve Inspection

• Material certification review (cast iron, ductile iron, steel)
• Dimensional verification
• Surface condition assessment
• Casting defect identification

Pre-Coating Quality Control

• Degreasing effectiveness verification (water break test)
• Phosphate coating weight measurement (coulometric method)
• Phosphate uniformity inspection (visual)
• Moisture content check (before powder application)

In-Process Monitoring

• Electrostatic parameters (voltage, current) continuous monitoring
• Film thickness measurement (every nth part)
• Coverage inspection (visual check of recessed areas)
• Oven temperature recording (chart recorder or digital logger)

Final Product Testing (Per GB/T Standards)

Mechanical Properties:
- Pencil Hardness (GB/T 6739-1996): Target >2H
- Impact Resistance (GB/T 1732-1993): 50 kg·cm minimum
- Flexibility (GB/T 6742-1986): Pass at 1T mandrel bend
- Adhesion (GB/T 9286-1998): Grade 0 required

Corrosion Resistance:
- Salt Spray (GB/T 1771-1991): >1000 hours (neutral salt spray)
- Water Immersion (40°C, 240 hours): No blistering, no rust
- Humidity Resistance (100% RH, 40°C, 500 hours): No degradation

Chemical Resistance:
- 3% Sulfuric Acid: 24-hour immersion, no blistering
- 3% Sodium Hydroxide: 24-hour immersion, no blistering
- Water: 240-hour immersion @ 40°C, no degradation

Special Tests (Grade-Specific):
- Antistatic Grade: Surface resistivity 10³-10⁷ Ω
- Drinking Water Grade: Leaching test per NSF/ANSI 61
- Fire Protection Grade: Extended water immersion (1000+ hours)

Documentation Provided

• Certificate of Analysis (COA) with actual test data
• Test reports for all GB/T standard tests
• Material composition declaration
• RoHS/REACH compliance certificates
• NSF/ANSI 61 certificate (drinking water grade, if requested)
• Traceability to raw material batches

Packaging & Delivery

Standard Packaging

• Box Size: 25 kg net weight per carton box
• Inner Protection: Heat-sealed polyethylene bag with desiccant pack
• Outer Packaging: 5-ply corrugated cardboard box with product label
• Box Marking: Product name, color, lot number, production date
• Pallet: 1250 kg per wooden/plastic pallet (50 boxes)
• Container Load: 10-12 metric tons per 20' container

Minimum Order Quantities

Standard Grades:
- Black RAL 9005 (stock color): 200 kg (8 boxes)
- Blue, Red, Green, Gray (common colors): 200 kg (8 boxes)
- Custom RAL Colors: 200 kg (8 boxes)

Specialized Grades:
- Drinking Water Grade: 200 kg minimum (requires certification)
- Antistatic Mining Grade: 200 kg minimum (specialized formulation)
- Fire Protection Grade: 200 kg minimum (red color stock available)

Sample Quantities:
- Testing Samples: 5 kg available for evaluation
- Color Approval: 5 kg sample for color matching approval

Lead Time & Delivery

Production Lead Time:
- Stock Colors (Black, Blue, Red): 3-5 working days
- Common RAL Colors: 7-10 working days
- Custom Colors: 10-14 working days (including color matching)
- Specialized Grades: 14-21 working days (certification documentation)
- Large Orders (>5 tons): 21-30 working days
- Emergency Orders: Expedited production available (surcharge applies)

Shipping Options:
- Domestic China: Truck delivery, 5-10 days depending on location
- International Sea Freight: 25-40 days (economical for large orders)
- International Air Freight: 5-10 days (for urgent orders)
- Express Courier (samples): 3-5 days via DHL/FedEx/UPS

Storage & Handling

Proper Storage Conditions

• Temperature: Store below 30°C (avoid temperature fluctuations)
• Humidity: Relative humidity <70% (dry, well-ventilated warehouse)
• Sunlight: Avoid direct sunlight exposure (UV degradation risk)
• Heat Sources: Keep away from heaters, boilers, steam pipes
• Fire Safety: Separate from ignition sources, no smoking area
• Stacking: Maximum 5 pallets high on level, stable surface
• Floor Protection: Store on pallets, not directly on floor

Shelf Life Management

• Unopened Packaging: 6 months under proper storage conditions
• Opened Bags: Immediately reseal with heat sealer or clamp, use within 2 months
• Extended Storage: After 6 months, retest powder before use
• Quality Indicators: Flowability, melt flow, cure characteristics
• Acceptance: Powder passing retest is suitable for production use

Handling Best Practices

• Moisture Protection: Most critical - moisture causes irreversible clumping
• Contamination Prevention: Never mix different powder batches without testing
• Bag Sealing: Always completely seal bags immediately after use
• Transfer Equipment: Use clean, dry scoops and containers
• Equipment Cleaning: Thoroughly clean all equipment between color/product changes
• Inventory Rotation: First-In-First-Out (FIFO) system to minimize aging
• Spill Cleanup: Immediately clean up any spilled powder (slip hazard)

Health, Safety & Environment

Product Safety Classification

• Hazard Rating: Non-hazardous material (powder form)
• Toxicity: Non-toxic in powder and cured forms
• Flammability: Combustible dust - follow dust explosion prevention protocols
• Skin/Eye Irritation: Mechanical irritation only (not chemical)
• Respiratory: Nuisance dust requiring respiratory protection

Personal Protective Equipment (PPE)

Minimum Required PPE:
- Respiratory Protection:
- N95 or P95 disposable respirator (minimum)
- Powered air-purifying respirator (PAPR) recommended for extended use
- Full-face respirator for high-dust environments

• Eye Protection:
• Safety glasses with side shields (minimum)
• Goggles for overhead work
• Face shield for heavy dust conditions
• Skin Protection:
• Long-sleeve shirt and long pants (minimum)
• Nitrile or latex gloves (optional, for skin sensitivity)
• Disposable coveralls for heavy exposure
• Foot Protection:
• Non-slip safety shoes or boots
• Conductive footwear in antistatic environments

Workplace Safety Measures

Ventilation:
- Local exhaust ventilation in spray booth (minimum 100 FPM face velocity)
- General ventilation in work area
- Powder reclaim system properly designed and maintained

Dust Explosion Prevention:
- Ground all equipment and containers (verify <10Ω resistance)
- Eliminate all ignition sources (no smoking, no open flames, no hot work)
- Prevent dust cloud formation (good housekeeping)
- Use explosion-proof electrical equipment in spray booth
- Regular cleaning to prevent dust accumulation

Housekeeping:
- Daily cleaning of spray booth and work areas
- Weekly deep cleaning of equipment and surroundings
- Use vacuum cleaners (not compressed air) to prevent dust clouds
- Dispose of waste powder properly

Fire Safety:
- ABC dry chemical fire extinguishers readily available
- Know evacuation routes and assembly points
- No smoking policy in powder coating area
- Hot work permits required for any welding/cutting nearby

First Aid Procedures

Inhalation:
- Move person to fresh air immediately
- Allow to rest in comfortable position
- If breathing difficulty persists, seek medical attention
- Provide oxygen if trained and available

Eye Contact:
- Rinse eyes with clean water for at least 15 minutes
- Hold eyelids open to ensure thorough rinsing
- Remove contact lenses if present and easy to do
- Seek medical attention if irritation persists

Skin Contact:
- Wash thoroughly with soap and plenty of water
- Remove contaminated clothing
- If skin irritation develops, seek medical attention
- Launder contaminated clothing before reuse

Ingestion (Accidental):
- Rinse mouth with water
- Drink 1-2 glasses of water to dilute
- Do NOT induce vomiting
- Seek medical attention immediately
- Bring product SDS to medical personnel

Environmental Responsibility

Zero VOC Coating:
- No volatile organic compounds during application or curing
- Complies with strictest air quality regulations
- No environmental permits required for VOC emissions

Waste Minimization:
- Overspray powder can be recovered and reused (with proper filtering)
- Typical powder utilization: 95-98% (vs. 40-60% for liquid paint)
- Minimal material waste

No Hazardous Waste:
- Cured powder coating is non-hazardous solid waste
- Can be disposed in normal solid waste stream
- No special hazardous waste handling required

Energy Efficiency:
- Single-coat application (vs. multiple coats for liquid)
- Fast cure cycle (10-15 minutes vs. hours for air-dry paint)
- Lower energy consumption per coated part

Sustainable Manufacturing:
- ISO 9001:2015 certified quality system
- Waste reduction initiatives
- Energy conservation programs
- Responsible raw material sourcing

Certifications & Standards Compliance

Quality Management

• ISO 9001:2015: Quality Management System certified
• Annual Third-Party Audits: Maintaining certification
• Continuous Improvement: Kaizen and Six Sigma methodologies
• Customer Satisfaction: >95% customer satisfaction rating

Product Performance Standards (China)

All products tested to Chinese National Standards:
- GB/T 1732-1993: Determination of impact resistance of film
- GB/T 9286-1998: Cross-cut test for paints and varnishes
- GB/T 6739-1996: Determination of film hardness by pencil test
- GB/T 6742-1986: Determination of flexibility of films (mandrel bend test)
- GB/T 1771-1991: Determination of resistance to neutral salt spray (NSS)
- GB/T 1740-1979: Artificial weathering test (QUV accelerated aging)

Drinking Water Safety (Optional)

• NSF/ANSI Standard 61: Drinking water system components
• GB/T 17219: Safety evaluation standard for drinking water distribution equipment
• Third-Party Testing: Certified by accredited laboratory
• Leaching Tests: Heavy metals, organic compounds within limits

Mining Industry Standards (Antistatic Grade)

• MT 113: Safety regulations for coal mine
• Antistatic Property: Surface resistivity testing per standard
• Mine Safety Certification: Available upon request

Environmental Compliance

• RoHS Directive 2011/65/EU: Restriction of hazardous substances
• REACH Regulation (EC) 1907/2006: Registration, evaluation, authorization of chemicals
• Lead-Free Formulation: <100 ppm lead content
• Cadmium-Free: <100 ppm cadmium content
• Chromium VI-Free: <1000 ppm hexavalent chromium

Why Choose DAMEI for Valve & Pipe Coating?

18 Years of Industrial Coating Expertise

Since 2007, DAMEI has specialized in heavy-duty powder coatings for industrial applications. Our valve and pipe coatings protect critical infrastructure in:
- Municipal water systems serving millions of people
- Chemical plants processing hazardous materials
- Coal mines operating in explosive atmospheres
- Fire protection systems in high-rise buildings
- Oil & gas facilities in harsh environments

World-Class Raw Materials

We source exclusively from global industry leaders:
- DSM (Netherlands): Premium epoxy and polyester resins
- Allnex (Belgium): Specialty anticorrosive resins
- Clariant (Switzerland): High-performance anticorrosive pigments
- BASF (Germany): Flow agents, degassing agents, texturing agents
- Sinopec/Chuanhua (China): High-purity titanium dioxide, color pigments

Comprehensive Grade Selection

Unlike most manufacturers offering one-size-fits-all coatings, DAMEI provides:
- Drinking Water Grade: NSF/ANSI 61 certified for potable water
- Fire Protection Grade: Modified epoxy for internal/external coating
- Antistatic Grade: Permanent antistatic properties for mining
- General Industrial: High-performance standard formulation
- Custom Formulations: Tailored to your specific requirements

Large-Scale Production with Quality Consistency

• Annual Capacity: 7,000 tons total powder coating production
• Automated Manufacturing: Computer-controlled batching and mixing
• Quality Lab: Fully equipped with modern testing instruments
• Batch Traceability: Complete documentation from raw materials to finished product
• Consistency: ΔE <1.0 color variation batch-to-batch

Technical Support & Service Excellence

Pre-Sales Support:
- Application consulting and recommendation
- Color matching and sample development
- Cost analysis and ROI calculations
- Coating system design assistance

Production Support:
- Application parameter optimization
- Operator training (on-site or at factory)
- Equipment recommendation and setup
- Quality troubleshooting and problem solving

After-Sales Support:
- Performance monitoring and feedback
- Field failure investigation and resolution
- Continuous improvement collaboration
- Long-term partnership development

Flexible Business Terms

• Competitive Pricing: Direct manufacturer, no middleman markup
• Flexible MOQ: 200 kg for stock colors, 200 kg for custom
• Payment Terms: Negotiable for established customers (L/C, T/T, O/A)
• Consignment Inventory: For high-volume customers
• Technical Support Included: No additional charge for expert assistance

Request Free Sample & Complete Documentation

What We Provide FREE of Charge:

Product Samples: 5 kg of valve & pipe powder coating
- Choose your grade: Drinking Water, Fire Protection, Antistatic, or General Industrial
- Select color: Standard or custom matched

Technical Documentation:
- Complete Technical Data Sheet (TDS) with all specifications
- Material Safety Data Sheet (MSDS/SDS) for workplace safety
- Certificate of Analysis (COA) with actual batch test data
- GB/T Test Reports (hardness, adhesion, salt spray, impact, etc.)
- Application Guidelines for valve coating

Certification Documents:
- ISO 9001:2015 certificate
- RoHS compliance declaration
- REACH compliance documentation
- NSF/ANSI 61 certificate (for drinking water grade, if applicable)

Commercial Information:
- Detailed pricing quotation based on volume
- Lead time for production and delivery
- Packaging and shipping options
- Payment terms and conditions

Sample Request Process:

1: Contact Us with your specific requirements:
- Valve/pipe type and size
- Application environment (buried, immersed, chemical exposure, etc.)
- Required grade (drinking water, fire protection, antistatic, or general)
- Color preference
- Estimated annual volume

2: Specification Confirmation:
- Our technical team will recommend optimal formulation
- Discuss any special requirements or certifications needed
- Confirm color and finish

3: Sample Shipment:
- We prepare 5 kg sample with complete documentation
- Express shipping within 3-5 business days
- Tracking number provided

4: Evaluation & Testing:
- Apply coating on your actual valves/pipes
- Conduct your standard performance tests
- Evaluate appearance, coverage, and durability

5: Technical Review:
- Our engineers discuss your test results
- Adjust formulation if needed
- Finalize specifications

6: Production Order:
- Receive formal quotation and lead time
- Place order with confidence
- Ongoing technical support throughout production

Contact DAMEI Powder Coating

Ready to protect your valves and pipes with proven anticorrosive coating?

📧 Email: sales@dameipc.com
📱 Phone: +86-139-6365-5580
📠 Fax: +86-139-6365-5580
📱 Mobile/WhatsApp/WeChat: [+86-139-6365-5580]

🏭 Factory Address:
No. 1788 Weichang Road,
Lebushan Ecological Economic Development Zone,
Weicheng District, Weifang City,
Shandong Province, 261000, China

🌐 Website: www.dameipc.com

⏰ Business Hours:
Monday-Saturday, 8:00 AM - 6:00 PM (GMT+8)
Sunday: Closed (Emergency contact available)

🏢 Factory Visits Welcome:
Schedule a visit to our 22,000 m² manufacturing facility. See our production process, quality lab, and meet our technical team.

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Frequently Asked Questions

Q: What's the difference between drinking water grade and standard valve coating?

A: Drinking Water Grade is formulated specifically for potable water contact with NSF/ANSI 61 certification. It uses lead-free, cadmium-free pigments and resins that will not leach harmful substances into drinking water. Standard Grade uses the most cost-effective industrial pigments and is suitable for non-potable applications (fire protection, industrial process, wastewater, etc.). Chemical composition, leaching properties, and certifications are the main differences.

Q: Can antistatic powder coating lose its conductivity over time?

A: No, our antistatic formulation provides permanent conductivity. Unlike topical antistatic sprays that wear off, our antistatic pigments are incorporated throughout the coating matrix. Surface resistivity remains in the 10³-10⁷ Ω range for the life of the coating. This has been verified through long-term testing and real-world mining applications over 10+ years.

Q: What's your minimum order quantity for drinking water grade powder?

A: The MOQ for drinking water grade is 200 kg (8 boxes of 25 kg each). This specialized formulation requires separate production to avoid cross-contamination with industrial grades. However, we can provide 5 kg samples for testing and NSF/ANSI 61 certification documentation review before committing to full production order.

Q: Can this coating be applied to cast iron valves?

A: Yes, absolutely. Our valve powder coating adheres excellently to cast iron, ductile iron, carbon steel, and stainless steel. Cast iron requires thorough surface preparation:
1. Remove casting sand and scale (abrasive blasting preferred)
2. Grind any surface defects or porosity
3. Degrease completely
4. Apply zinc phosphate conversion coating
5. Powder coat and cure per standard schedule

Cast iron's porosity actually provides excellent mechanical keying for superior adhesion.

Q: How thick should the coating be for buried valve applications?

A: For underground/buried applications, we recommend 80-120 μm film thickness (vs. 60-80 μm standard). Thicker coating provides:
- Extended corrosion barrier
- Better resistance to soil chemicals
- Protection against mechanical damage during burial
- Holiday (pinhole) elimination

However, soil conditions matter: highly corrosive soil (high sulfate, low pH, high chloride) may require additional protection like cathodic protection or polyethylene wrapping over the powder coating.

Q: What colors are available for fire protection valves?

A: Fire protection valves typically use:
- Fire Protection Red (RAL 3000, RAL 3002, RAL 3009) - Most common
- Blue (RAL 5010, RAL 5015) - For potable water connections
- Green (RAL 6032) - For non-potable water
- Yellow (RAL 1021) - For gas connections

We stock fire protection red with 3-5 day lead time. Other colors require 10-14 days for custom production (200 kg minimum).

Q: Is your coating suitable for high-temperature steam valves?

A: Standard powder coating is suitable for continuous temperatures up to 120°C and intermittent exposure to 150°C. For steam applications:
- Low-pressure steam (<50 PSI, <120°C): Standard coating acceptable
- Medium-pressure steam (50-150 PSI, 120-180°C): Special high-temp silicone formulation required
- High-pressure steam (>150 PSI, >180°C): Powder coating not recommended; use high-temp liquid coatings or metallic coatings

For most industrial steam applications, we recommend coating external valve surfaces only, leaving internal wetted surfaces uncoated or using high-temp liquid coating.

Q: Can you match my company's custom color for valve identification?

A: Yes, we offer precise color matching service. Send us:
- Physical color sample (coated metal panel preferred), OR
- Pantone/RAL color code, OR
- Color specification (Lab* values)

We'll formulate a custom powder and provide color chips for approval before production. Color tolerance is typically ΔE <1.0 for excellent batch-to-batch consistency. Minimum order for custom colors: 200 kg.

Q: How do I verify the coating is fully cured on my valves?

A: Four verification methods:

1. MEK Double Rub Test (most common):
   - Saturate cloth with MEK (methyl ethyl ketone) solvent
   - Rub coating surface with moderate pressure, 50 double rubs
   - Properly cured coating shows no softening or removal
   - Partially cured coating will soften or dissolve
2. Crosshatch Adhesion Test (GB/T 9286):
   - Cut grid pattern through coating to substrate
   - Apply and remove adhesive tape
   - Grade 0-1 = excellent cure, Grade 4-5 = under-cured
3. Visual Inspection:
   - Uniform gloss (no matte spots indicating under-cure)
   - No soft spots when pressed with fingernail
   - No wrinkles or texture defects
4. Hardness Test:
   - Pencil hardness should be >2H when fully cured
   - Under-cured coating shows <H hardness

If coating fails verification, increase oven temperature or cure time.

Q: Do you provide on-site technical support for application problems?

A: Yes, for significant projects or recurring quality issues, we offer on-site technical support:

What we provide:
- Application audit (surface prep, powder application, curing)
- Equipment setup and optimization
- Operator training
- Quality troubleshooting
- Process improvement recommendations

Availability:
- Domestic China: Usually within 3-5 days of request
- International: Requires advance planning and travel arrangements
- Cost: Negotiable based on project scope (may be no charge for large customers)

Most application issues can be resolved via email/phone support with photos and detailed description.

Case Studies & Success Stories

Municipal Water System Valve Replacement Project

Client: Large city municipal water utility
Project Scope: 5,000+ gate valves and butterfly valves (4"-48" diameter)
Coating: DAMEI drinking water grade powder, NSF/ANSI 61 certified
Challenges: Strict water quality requirements, high-visibility public project
Results:
- All valves passed NSF certification testing
- Zero coating failures after 8 years of service
- Estimated 30-year service life (vs. 15 years for liquid epoxy)
- Cost savings: $2 million over life cycle vs. recoating

Coal Mine Dewatering System

Client: Underground coal mining operation
Project Scope: 3,000 meters of mine dewatering pipes and valves
Coating: DAMEI antistatic grade powder (black, 80 μm)
Challenges: Explosive atmosphere (methane and coal dust), high humidity
Results:
- Zero static-related incidents in 6+ years
- Surface resistivity stable at 10⁵ Ω (tested annually)
- Coating shows no corrosion despite 95%+ humidity
- Approved by mine safety inspectors
- Operational cost savings vs. metal pipe replacement

Chemical Plant Expansion

Client: Chemical manufacturing facility
Project Scope: 800+ process valves for sulfuric acid and caustic soda service
Coating: DAMEI chemical-resistant epoxy powder (customized formulation)
Challenges: Exposure to 30% sulfuric acid and 20% caustic soda
Results:
- Coating passed 72-hour acid/alkali immersion testing
- No failures after 5 years of continuous chemical exposure
- Superior performance vs. PTFE-lined valves (lower cost, no liner failure)
- Customer expanded DAMEI coating to entire plant valve inventory

Last Updated: 2025-10-04
All product specifications based on DAMEI actual catalog data
Technical information subject to continuous improvement

DAMEI Powder Coating - Protecting Critical Industrial Infrastructure Since 2007