Abstract： ASME A112.4.1:2009 pdf download.Water HeaterRelief Valve Drain Tubes. 2.4 Installation Instructions Installation instructions, including post-installation relief valve testing procedures, shall be provided with the unit. A permanent tag or...

ASME A112.4.1:2009 pdf download.Water HeaterRelief Valve Drain Tubes.

2.4 Installation Instructions

Installation instructions, including post-installation relief valve testing procedures, shall be provided with the unit. A permanent tag or label relating to the relief valve test procedures shall be provided with the device.

2.5 Marking and Identification

2.5.1 The manufacturer’s name or trademark shall be permanently marked on the drain tube.

2.5.2 For products intended for other than OEM applications, the limitations of installation for the drain tube

shall be permanently marked on the tube in lettering not less than 0.125 in. in height. For example, “HAND-TIGHTEN ONLY,” USE ONLY ON T & P VAI.VFS WITH 105,000 Btu/hr OR LESS RATING,” or “NO PIPE SEALANTS.”

3 TEST METHODS AND PERFORMANCE REQUIREMENTS

3.1 Temperature Test

3.1.1 Test Equipment. A steam-generating source capable of producing 105,000 Btufhr at 15 psig pressure and 250°F temperature shall be used to conduct this test. The steam source shall be fitted with instruments that measure

pressure and temperature. The steam source shall be connected to a -in. relief valve that complies with ANSI Z21.22. The relief valve shall be mounted horizontally and the drain Lube shall be installed in a downward position.

For drain tubes intended for installation in relief valve locations at the top of a water heater, the test

assembly shall be installed with the relief valve in a vertical position and the drain tube connected and tested accordingly.

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