Draft Details

1.1 Inclusions

These provisions apply to the construction, materials, performance, and testing of NPS 1-1/4 in (32mm) and smaller self-acting service-type regulators with overpressure protection devices utilized to control the pressure of gas delivered to a customer’s piping at a delivery pressure of 2 psi or less (14 kPa).

1.2 Temperature ratings

This standard includes regulators capable of operation over an ambient temperature range of –40 to 150°F (–40 to 65.6 °C) up to the pressure recommended by the manufacturer, but not exceeding 125 psi (861.8 kPa).

1.3 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.

1.4 Units of measurement

The yard-pound units provided are the standard. The SI (metric) equivalents in parentheses may be approximate values and are provided for information only, or for markings where both units of measurement are required.