Part 255 Maintenance

Section	Description
255.701	Scope
255.703	General
255.705	Transmission lines: Patrolling
255.706	Transmission lines: Leakage surveys
255.707	Line markers for mains and transmission lines
255.709	Transmission lines: Record keeping
255.710	Transmission lines: Assessments outside of high consequences areas
255.711	Transmission lines: General requirements for repair procedures
255.712	Analysis of predicted failure pressure
255.713	Transmission lines: Permanent field repair of imperfections and damages
255.715	Transmission lines: Permanent field repair of welds
255.717	Transmission lines: Permanent field repair of leaks
255.719	Transmission lines: Testing of repairs
255.720	Distribution systems: Leak repair
255.721	Distribution systems: Patrolling
255.723	Distribution systems: Leakage surveys and procedures
255.724	Distribution systems: Service Lines
255.725	Test requirements for reinstating service lines
255.726	Inactive service lines
255.727	Abandonment or inactivation of facilities
255.729	Compressor stations: Procedures for gas compressor units
255.731	Compressor stations: Inspection and testing of relief devices
255.732	Compressor stations: Additional inspections
255.733	Compressor stations: Isolation of equipment for maintenance or alterations
255.735	Compressor stations: Storage of combustible materials
255.736	Compressor stations: Gas detection
255.737	Pipe-type and bottle-type gas holders
255.739	Pressure limiting and regulating stations: Inspection and testing
255.740	Pressure regulating, limiting, and overpressure protection - Individual service lines directly connected to production, gathering, or transmission pipelines.
255.741	Pressure limiting and regulating stations: Telemetering or recording gauges
255.743	Pressure limiting and regulating stations: Testing of relief device
255.744	Service regulators and vents: Inspection
255.745	Valve maintenance: Transmission lines
255.747	Valve maintenance: Distribution systems
255.748	Valve maintenance: Service line valves
255.749	Vault maintenance
255.750	Launcher and receiver safety
255.751	Prevention of accidental ignition
255.753	Caulked bell and spigot joints
255.755	Protecting cast iron pipelines
255.756	Replacement of exposed or undermined cast iron piping
255.757	Replacement of cast iron mains paralleling excavations
255.758	Joining plastic pipe by heat fusion, equipment maintenance and calibration