Section 3.19 Valves, Pressure Piping, and Fittings
NOTE (126.96.36.199): Examples of two acceptable pipe standards are ASTM A106 and ASTM A53, Type E or Type S.
(a) A pressure gauge fitting shall be provided on the jack side of the check valve in or immediately adjacent to the hydraulic control valve.
(2) a pressure-sensing means display, and the pressure gauge fitting shall be located either inside or outside the hoistway
(a) protect the specified piping, tubing, or fittings from damage, which would cause unsafe elevator operation
(b) prevent uncontrolled movement of the elevator in the event of failure of the specified piping, tubing, or fittings
(a) not be installed within the hoistway nor project into or through any wall. Installation shall be accomplished without introducing any twist in the hose and shall conform to the minimum bending radius of SAE 100, R2-type, high-pressure, steel-wire-reinforced, rubber-covered hydraulic hose specified in SAE J517.
(b) have a bursting strength sufficient to withstand not less than 10 times the working pressure (see Section 1.3). They shall be tested in the factory or in the field prior to installation at a pressure not less than 5 times the working pressure and shall be marked with the date and pressure of the test.
(c) conform to the requirements of SAE 100, R2-type hose specified in SAE J517 and be compatible with the fluid used.
(d) be nonreusable-type fittings.
(e) be permanently labeled/marked, indicating
(1) the name or trademark by which the manufacturer of the hose and fittings can be identified
(2) the type of hose and fitting
(3) the minimum factory test pressure
(4) the minimum bending radius of the hose
(5) the date of installation
(6) the inspection procedure
(7) the name of the elevator contractor
(a) Type and Location. The relief valve shall be located between the pump and the check valve and shall be of a type and so installed in the bypass connection that the valve cannot be shut off from the hydraulic system.
(b) Size. The size of the relief valve and bypass shall be sufficient to pass the maximum rated capacity of the pump without raising the pressure more than 50% above the working pressure. Two or more relief valves shall be permitted to be used to obtain the required capacity.
(c) Sealing. Relief valves shall be sealed after being set to the correct pressure.
(a) certifying organization's name or identifying symbol
(b) the name, trademark, or file number by which the organization that manufactured the product can be identified
(c) statement of compliance with ASM E A17.1/CSA B44
(d) type designation
(a) Single-Jack Arrangements. Where a single valve is used, it shall be located in the pressure piping within 300 mm (12 in.) of the hydraulic jack. Multiple parallel valves are permitted in lieu of a single valve. These shall be located to minimize the distance from the valves to the hydraulic jack.
(b) Multiple-Jack Arrangements. Multiple-jack arrangements shall conform to one of the following:
(1) A single overspeed valve shall be located in the pressure piping within 300 mm (12 in.) of each hydraulic jack. Multiple parallel valves are permitted in lieu of single valves at each hydraulic jack. These shall be located to minimize the distance from the valves to each hydraulic jack.
(2) A single overspeed valve shall be located in the pressure piping on the hydraulic machine side of, and immediately before, the tee junction, wye junction, or branch junction that connects the branch pressure pipes to the jacks. Multiple parallel valves are permitted in lieu of a single valve at the junction. For dual-hydraulic-jack systems, the total length of branch pressure pipe between the tee junction or wye junction and the jacks shall not exceed the distance between the jacks, measured horizontally, plus 1 m (39 in.). For multiple-jack systems, the length of branch pressure piping shall be minimized.
188.8.131.52.4 Strength of Overspeed Valve Pressure Piping and Fittings Between the Overspeed Valve and the Jacks
(a) The overspeed valve tripping speed shall be not less than 110% nor greater than 140% of the elevator operating speed in the down direction, but in no case shall exceed 0.3 m/s (60 ft/min) above the rated elevator speed.
(b) The average deceleration rate shall be not less than 1.96 m/s2 (6.44 ft/s2) nor more than 9.81 m/s2 (32.2 ft/s2).
(c) Any peak deceleration rate in excess of 24.53 m/s2 (80.5 ft/s2) shall have a duration not greater than 0.04 s.
(a) monitored cathodic protection
(c) a protective casing, immune to galvanic or electrolytic action, salt water, and other known underground conditions, completely surrounding the exterior surfaces of the piping
Hydraulic control valves shall conform to the electrical requirements in Clause 4 of CSA C22.2 No. 139.