ANSI AGA B 109.1:2000 pdf download.DIAPHRAGM-TYPE GAS DISPLACEM ENT METERS (Under 500 Cubit Feet Per Hour Capacity).
Connection dimensions for those listed above as standard, as well as for others commonly used, are tabulated in Appendix A and B.
Pipe threads specified are in accordance with ANSI/ASME B 1.20.1, “Pipe Threads. General Purpose (inch).”
2.2.2 TopMounted Connection Tolerances. Meters with top-mounted connections shall conform to the following center-to-center tolerance Iimits (Dimension A. Figure 1):
To and including 6.0 inches (152.4 mm) center to center ± 1132 inch (0.8 mm).
Over 6.0 inches (152.4 mm)to and including 12.0 inches (304.8 mm) cenier to cen(er= ± 1/16 inch (1.6 mm).
Over 12.0 inches (304.8 mm) to and including 18.0 inches (457.2 mm) center to center = ± 3132 inch (2.4 mm).
The axis of the threads on the connections shall be perpendicular to the gasket face within 2 degrees. (Dimension B Figure 1.)
The gasket surfaces of top-connected meters shall not permit a gap exceeding 0.050 inch (1.3 mm) from a plane formed by a fiat plate resting on both connections. That plane is to be perpendicular to a plane formed by the nominal axes of the connections. (Dimensions C,. C2, C3 Figure 1).
It is the intent of these specifications that a suitable sealing gasket be used between the meter connection and mating swivel connection.
2.3 METER IDENTWICATION
2.3.1 Identifying badges shall be readable from the same general position as the index.
2.3.2 Manufacturer’s Badge. The manufacturer’s badge shall contain identification information in a permanern and legible form. It shall be permanently affixed to the meter so as to be readable from the same general position as the index and also to minimize damage during handling. Numbers shall be of the type shown in Figure 2. The meter serial number shall be at least 0.25 inch (6.3 mm) high and shall be embossed on the badge and shall he visible within an angle of 45 degrees from the perpendicular tO the plane of the badge. The following information shall be contained on the badge:
a. Meter Class.
b. Manufacturers name or trademark.
C. Meter serial number.
d. Year of manufacture.
e. Maximum Allowable Operating Pressure (MAOP) rating.
f. If the gas meter is a temperature-compensating model, the badge shall be a durable red color and shall state that the meter is “temperature compensating.”
g. Meter capacity at a 0.5-inch (125 Pa) water column pressure differential.ANSI AGA B 109.1 pdf download.