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Title: Gas Services- As-Built Testing For Capacity
Author: Steven J. Troch
Source: American Gas Association 1998
Year Published: 1998
Abstract: In the past thirty years, the characteristics of a typical gas service has changed dramatically. At Baltimore Gas and Electric, our services have evolved from a majority being either steel or copper (1960s-early 1970s), steel or plastic (1970s-early 1980s) to the current practice of almost exclusively installing plastic services connected to plastic mains. Today the installation of new gas mains is 95% plastic pipe (with the remainder being large diameter or higher pressure mains requiring steel pipe) and 99% of all new services are plastic pipe/tubing. Throughout this transition the physical components of services have changed accordingly. Where once welded steel tees were the most common means of service connections, we transitioned to plastic sidewall fused tees and more recently to electrofusion tapping tees with standard tap sizes. The typical gas service today also consists of an outside pre-fabricated riser and valve at the building wall with an outside meter/regulator set. This differs from past typical gas services installed with underground service valves and inside meter/regulator locations.

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