scope:

PREFACE

The standards set forth herein apply to the first edition of the Standard for GAS Appliance Pressure Regulators, ANSI Z21.18-1995 . CGA-6.3-M95, and supersede corresponding standards therein. Following their preparation by the supervising subcommittee, they were accepted by ANSI and the Interprovincial GAS Advisory Council, and subsequently approved.

NOTE: Changes, other than editorial, are denoted by a vertical line the margin.

On June 30, 1997, the Canadian Standards Association (CSA) acquired International Approval Services (IAS) which was until then a joint venture of the American Gas association (A.G.A) and the Canadian gas Association (CGA). Under this agreement CSA acquired the complete range of IAS standards administration, certification and registration products and services for appliances and accessories fueled by natural and liquefied petroleum gases.