ASME A112.4.1:2009 pdf free download

ASME A112.4.1:2009 pdf free download.Water Heater Relief Valve Drain Tubes.
ASME A112.4.1 establishes performance requirements and test methods applicable to water heater relief valve drain (or runoff) tubes for use with relief valves having a steam rating of 105,000 Btu/hr or less
1.2 Reference Standards
The following reference standards shall be used to evaluate the product, and are cited herein. Unless indicated, the latest edition of these standards shall be applicable for certification to this Standard.
ANSI Z21.22, Relief Valves for Hot Water Supply
Systems
Publisher: International Association of Plumbing and Mechanical Officials (IAPMO), 20001 Walnut Drive, South Walnut, CA 91789-2825 (www.iapmo.org)
ASME Bl.20.1, Pipe Threads, General Purpose (Inch)
Publisher: The American Society of Mechanical
Engineers (ASME), Three Park Avenue, New York, NV
10016-5990; Order Dept: 22 I.aw Drive, P.O. Box 2900,
Fairfield, NJ 07007-2900 (www.asme.org)
2 REQUIREMENTS
2.1 Size
The drain tube shall have a minimum inside diameter of 3’ in. and a minimum length of 48 in.
2.2 Material
The material that is used in the composition of the drain tube shall be capable of withstanding the tempera- hire tests cited in section 3 without collapse or permanent distortion. Materials shall be corrosion resistant.
2.3 Joints
Any joints within the tube shall be firmly affixed and shall withstand the temperature tests without separation or leakage. Assembly of the drain tube to the relief valve shall be possible by hand-tightening only. Connecting threads shall comply with ASME 81 .20.1 for in. NPT pipe threads.