Part 255 Design of Pipeline Components

255.141

Scope

255.143

General requirements

255.144

Qualifying metallic components

255.145

Valves

255.147

Flanges and flange accessories

255.149

Standard fittings

255.150

Passage of internal inspection devices

255.151

Tapping

255.153

Components fabricated by welding

255.155

Welded branch connections

255.157

Extruded outlets

255.159

Flexibility

255.161

Supports and anchors

255.163

Compressor stations: Design and construction

255.165

Compressor stations: Liquid removal

255.167

Compressor stations: Emergency shutdown

255.169

Compressor stations: Pressure limiting devices

255.171

Compressor stations: Additional safety equipment

255.173

Compressor stations: Ventilation

255.179

Valves on pipelines to operate at 125 PSIG (862 kPa) or more

255.181

Distribution line valves

255.183

Vaults: Structural design requirements

255.185

Vaults: Accessibility

255.187

Vaults: Sealing, venting, and ventilation

255.189

Vaults: Drainage and waterproofing

255.190

Calorimeter or calorimixer structures

255.191

Design pressure of plastic fittings

255.193

Valve installation in plastic pipe