R616-3-10. Hydraulic Elevator Piping

A. This rule establishes minimum standards for hydraulic fluid piping in hydraulic elevators. The piping specifications referred to in this rule are governed by ASME or ASTM piping specifications (e.g. ASME Specification SA-53 Table X2.4).

B. Hydraulic elevators not incorporating a safety valve may use schedule 40 piping.

C. For newly installed hydraulic elevators that do incorporate a safety valve:

1. Where piping is protected by the safety valve, schedule 40 piping may be used;

2. Where grooved or threaded connections are used in piping that is unprotected by the safety valve, i.e. between the safety valve and the hydraulic jack(s), nominal pipe size (NPS)3 or schedule 80 piping may be used;

3. Where piping is unprotected by the safety valve, but welded or bolted flange connections are used, schedule 40 piping may be used.