2024 Ontario Building Code Steel Piping Regulations | empcontracting.ca Inc. London Ontario
Sarah's Expert Insight
OBC Compliance Specialist
"In aging neighborhoods across London and during lakeside developments in Muskoka, we often see older galvanized systems that no longer meet modern water distribution standards. As empcontracting.ca Inc. your construction contractor in London, Ontario, we recommend transitioning to 316L stainless steel for specialized projects or modern synthetics for residential drainage to avoid the corrosion issues common with older steel implementations."
Navigating the complexities of the 2024 Ontario Building Code (OBC) is essential for any successful plumbing or drainage project. At empcontracting.ca Inc. your construction contractor in London, Ontario, we prioritize compliance to ensure long-term durability and safety.
7.2.6.7. Standards for Galvanized and Welded Steel Pipe
According to the OBC, welded and seamless steel pipes are generally prohibited in plumbing systems. However, there are specific exceptions regarding galvanized steel:
Drainage and Venting Systems
Galvanized steel pipe is permitted for use in drainage or venting systems, provided it is installed above ground and inside the building. For drainage applications, it must be used in conjunction with specific drainage fittings.
Water Distribution Restrictions
The use of galvanized steel in water distribution is strictly limited. It is only permitted in industrial occupancy buildings or for the essential repair of existing galvanized systems. All pipe of NPS 4 or smaller must meet Schedule 40 requirements.
7.2.6.8. Corrugated Steel Pipe for Storm Drainage
Corrugated steel pipe usage is restricted to underground applications outside of a building, specifically for storm drainage systems. These must conform to CAN/CSA-G401 standards. The couplings used must be engineered to:
- Maintain precise pipe alignment.
- Resist separation of pipe lengths.
- Prevent root penetration and material infiltration.
7.2.6.9. Sheet Metal Leaders
The OBC specifies that sheet metal leaders are only permitted for use above ground and outside the building structure.
7.2.6.10 & 7.2.6.11. Stainless Steel Pipe and Fittings
Stainless steel remains a high-performance option for specific construction needs. Under the code:
- Only grades 304/304L or 316/316L stainless steel are permitted.
- Pipes must conform to ASME B36.19M and ASTM A312/A312M standards.
- Butt weld fittings must match the specific grade of the pipe used to ensure chemical and structural consistency.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.