In modern commercial construction across Canada, HVAC systems account for a significant portion of total project costs. While performance and reliability remain critical, many projects suffer from over-specification of piping materials, leading to unnecessary budget increases.
This case study explores how a Toronto-based mechanical contractor optimized their HVAC piping design by adopting Schedule 20 galvanized steel pipe, achieving 15% cost savings, improving installation efficiency, and maintaining full system performance for low-pressure applications.
Project Background
Project Location: Toronto, Canada
Project Type: Commercial Office Building (18 Floors)
System: HVAC Chilled Water & Cooling System
Customer Type: Mechanical Contractor
The project included:
Central chilled water circulation system
Air handling units (AHU)
Cooling distribution pipelines
The piping system required:
Stable performance under low pressure
Corrosion resistance
Easy installation in confined building spaces
Customer Pain Points
1. Over-Designed Piping System
Initial design used Schedule 40 pipes, which caused:
Excessive material cost
Higher transportation and handling expenses
No significant performance advantage for low-pressure HVAC
👉 Overdesign increased total piping cost by ~15%
2. Installation Difficulty in High-Rise Building
Mechanical rooms were compact
Pipe routing complex
Heavy pipes increased labor intensity
3. Project Budget Constraints
Strict budget control from developer
Need to reduce costs without compromising performance
4. Corrosion Concerns in Closed-Loop Systems
Even though HVAC systems are closed-loop:
Condensation risk exists
Long-term durability required
Our Engineering Solution
We proposed a low-pressure optimized piping solution:
✔ Schedule 20 Galvanized Steel Pipe
✔ Mixed Connection System (Threaded + Grooved)
Technical Specification Table
| Parameter | Specification |
|---|---|
| Product | HVAC Galvanized Steel Pipe |
| Standard | ASTM A53 Grade B |
| Sizes | 2" – 8" (DN50–DN200) |
| Outer Diameter | 60.3 – 219.1 mm |
| Wall Thickness | 2.77 – 3.76 mm |
| Length | 6 meters |
| End Type | Threaded / Grooved |
| Zinc Coating | ≥ 60 μm |
| Quantity | 110 Tons |
HVAC System Optimization Strategy
1. Low-Pressure System Matching
HVAC chilled water systems typically operate at:
Pressure: < 1.6 MPa
Temperature: 5–45°C
👉 SCH 20 is fully sufficient for such conditions
2. Weight Reduction & Handling Efficiency
| Item | SCH 20 | SCH 40 |
|---|---|---|
| Weight | ↓ 20–25% | Heavier |
| Transport Cost | Lower | Higher |
| Installation | Easier | Harder |
3. Flexible Connection Methods
Threaded (≤2") → small diameter pipes
Grooved (>2") → fast installation
👉 Hybrid system improved efficiency significantly
4. Corrosion Protection Strategy
Hot dip galvanized coating
Suitable for:
Condensation environments
Long-term operation
Installation Optimization
Traditional Method:
Full welding
Heavy lifting
Slow installation
Our Approach:
Pre-threaded pipes
Grooved connections
Reduced welding
👉 Result: Faster and cleaner installation
Project Execution Timeline
| Stage | Duration |
|---|---|
| Technical Design Adjustment | 3 days |
| Production | 12 days |
| Processing | 5 days |
| Shipping | 25 days |
👉 Total Lead Time: ~45 days (optimized supply chain)
Final Results
💰 Cost Reduction
Total savings: 15%+
Reduced material and labor costs
⚡ Installation Efficiency
Installation time reduced by 25%
Labor workload significantly lowered
🛡️ System Reliability
Stable operation in HVAC system
No leakage or corrosion issues
📦 Supply Chain Advantage
Stable delivery
High product consistency
Customer Feedback
"Using Schedule 20 galvanized pipe was a smart optimization. It met all system requirements while significantly reducing costs and installation time."
Why SCH 20 Pipe is Ideal for HVAC Systems
Designed for low-pressure systems
Lightweight and easy to install
Cost-efficient alternative to SCH 40
Durable with galvanized protection
FAQ Section
1. Can Schedule 20 pipe be used in HVAC systems?
Yes. It is widely used in low-pressure chilled water and cooling systems, offering excellent cost-performance balance.
2. What is the pressure limit for SCH 20 pipe?
It depends on size, but typically suitable for low to medium pressure systems (<1.6 MPa).
3. Is galvanized pipe necessary for HVAC?
Yes, especially to prevent:
Internal corrosion
Condensation damage
4. SCH 20 vs SCH 40 for HVAC?
SCH 20 is more economical and easier to install, while SCH 40 is used only when higher pressure is required.
Call To Action
Looking for a reliable HVAC galvanized steel pipe supplier for Canada or North America?
✔ ASTM standard pipes
✔ Threaded & grooved processing
✔ Fast delivery
✔ Competitive pricing
👉 Contact us now to get a custom HVAC piping solution within 12 hours
+8615769214734
office@dongmjd.com
