Toronto, ON — The Technical Standards Safety Authority (TSSA) released its updated guidelines for “Registration of Pressure Piping,” which address P-standard registrations.
The guideline states that a P-number is an Ontario piping system design registration number specific to the final installation site. It is specific to the name of a piping certificate of authorization holder or the name of a trade association that is taking responsibility for the design.
The guideline also states all drawing submissions be submitted in electronic PDF format, together with the system specifications and a letter of application requesting registration.
General information required on these drawings will include, but is not limited to the following:
- Construction code information the latest edition (i.e. ASME B31.1, B31.3 or B31.5) (excludes B31.9 Building Services Piping)
- Service fluid information (e.g. air, water, steam or specific gas or liquid)
- Fluid service category ( B31.3 only)
- Design pressure
- Design temperature (minimum and maximum)
- Test pressure
- Type of test (e.g. pneumatic, hydrostatic)
- Safety/relief valve setting and location
- Statement regarding overpressure protection
The guideline adds that pipe specifications shall indicate, as a minimum, the following:
- Pipeline identification
- Pipe sizes and schedules
- Pipe material (following ASME or ASTM material specification), including description, specification, type, and grade as applicable
- Fittings classification, identification and rating
- Statement attesting that only registered fittings are used
- Pipe joining methods and details (welding, brazing, threaded, or others to specify)
The TSSA adds that “anyone, or any company, intending to design, fabricate, and/or install a piping assembly in Ontario should firstly refer to the Ontario regulations made under the Technical Standards and Safety Act, 2000, which govern such actions.”
Additionally, the notes made in the guideline are “intended to interpret and explain some of these requirements for the design registration of a piping system. They are not a substitute for the governing documents themselves.”
To read the full document, visit the Guideline for Registration of Pressure Piping.