Collapse to view only § 61.15-12 - Nonmetallic expansion joints.
- § 61.15-1 - Scope.
- § 61.15-5 - Steam piping.
- § 61.15-10 - Liquefied-petroleum-gas piping for heating and cooking.
- § 61.15-12 - Nonmetallic expansion joints.
- § 61.15-15 - Other piping.
§ 61.15-1 - Scope.
In conducting hydrostatic tests on piping, the required test pressure must be maintained for a sufficient length of time to permit an inspection to be made of all joints and connections. The setting of the relief valve or safety valve will be considered as establishing the maximum allowable working pressure of the system.
§ 61.15-5 - Steam piping.
(a) Main steam piping must be subjected to a hydrostatic test equal to 1.25 times the maximum allowable working pressure at the same periods prescribed for boilers in § 61.05-10. The hydrostatic test must be applied from the boiler drum to the throttle valve. If the covering of the piping is not removed, the test pressure must be maintained on the piping for a period of ten minutes. If any evidence of moisture or leakage is detected, the covering must be removed, and the piping thoroughly examined.
(b) All steam piping subject to pressure from the main boiler should be subjected to a hydrostatic test at a pressure of 1.25 times the maximum allowable working pressure of the boiler after every five years of service except as otherwise provided for in paragraph (a) of this section. Unless the covering of the piping is removed, the test pressure must be maintained on the piping for ten minutes. If any evidence of moisture or leakage is detected, the covering should be removed, and the piping thoroughly examined. No piping with a nominal size of 3 inches or less need be hydrostatically tested.
(c) The setting of safety and relief valves installed in piping systems must be checked by the marine inspector at each inspection for certification for vessels whose Certificates of Inspection are renewed each year. For other vessels, the setting must be checked twice within any 5-year period, and no more than 3 years may elapse between any check and its immediate predecessor.
§ 61.15-10 - Liquefied-petroleum-gas piping for heating and cooking.
(a) Leak tests as described in paragraph (b) of this section must be conducted at least once each month, at each inspection for certification, and at each periodic inspection. The tests required at monthly intervals must be conducted by an appropriately credentialed officer of the vessel or qualified personnel acceptable to the Officer in Charge, Marine Inspection. The owner, master, or person in charge of the vessel must keep records of such tests showing the dates when performed and the name(s) of the person(s) and/or company conducting the tests. Such records must be made available to the marine inspector upon request and must be kept for the period of validity of the vessel's current certificate of inspection. Where practicable, these records should be kept in or with the vessel's logbook.
(b) Test the system for leakage in accordance with the following procedure: With the appliance valve closed, the master shutoff valve on the appliance open, and one cylinder valve open, note pressure in gauge.
§ 61.15-12 - Nonmetallic expansion joints.
(a) Nonmetallic expansion joints must be examined externally at each inspection for certification and periodic inspection for signs of excessive wear, fatigue, deterioration, physical damage, misalignment, improper flange-to-flange spacing, and leakage. A complete internal examination must be conducted when an external examination reveals excessive wear or other signs of deterioration or damage.
(b) A nonmetallic expansion joint must be replaced 10 years after it has been placed into service if it is located in a system which penetrates the side of the vessel and both the penetration and the nonmetallic expansion joint are located below the deepest load waterline. The Officer in Charge, Marine Inspection may grant an extension of the ten-year replacement to coincide with the vessel's next drydocking.
§ 61.15-15 - Other piping.
(a) All other piping systems shall be examined under working conditions as required by the marine inspector.
(b) [Reserved]