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Winterization design guide

PROCESS TECHNOLOGY PROCEDURES DEPARTMENT SUBJECT PROCESS ENGINEERING WINTERIZATION DESIGN GUIDE PROCEDURE NO PTD-DGS - PREPARED BY W McMechen APPROVED BY A Bourji REVISION DATE June PAGE OF DATE November REV Table of Contents SCOPE RESPONSIBILITIES DEFINITIONS PROCEDURE General Information Protection Methods Evaluation Considerations HEAT TRACING General Steam Tracing Electric Tracing PROTECTION OF PIPING Underground Piping Process Piping Above Grade Protection Guidelines Protection with Heat Tracing and Insulation Protection with Other Methods Water Piping Protection Guidelines Utility Piping Fire Water systems PROTECTION OF EQUIPMENT Tanks Vessels Pumps Air Cooled Heat Exchangers Machinery PROTECTION OF INSTRUMENTS General Requirements Speci ?c Requirements doc CWINTERIZATION DESIGN GUIDE PROCEDURE NO PTD-DGS - REV DATE PAGE OF June SCOPE This design guide covers minimum general requirements for design of cold weather protection for piping equipment and instruments Speci ?c requirements for protection devices or installation details are not covered in this guide The purpose of winterization is to provide a facility that is both operable and maintainable during extended periods of low ambient temperature giving due consideration to the design doc CWINTERIZATION DESIGN GUIDE PROCEDURE NO PTD-DGS - REV DATE PAGE OF June of equipment and piping systems such that low temperatures do not impair performance or operation The facility should be designed to protect against the following conditions ? Freezing of process and utility uids ? Congealing of viscous uids ? Pour point suppression ? Condensation that may lead to corrosive compounds ? Any undesirable separation that may occur at low ambient temperatures ? Start-up problems under severe winter conditions doc CWINTERIZATION DESIGN GUIDE PROCEDURE NO PTD-DGS - REV DATE PAGE OF June ? Hydrate formation RESPONSIBILITIES The Process Engineer establishes requirements with the Client for winterizing and the minimum design and maximum ambient temperatures to be used in designing the piping instrumentation and equipment The Process Engineer also determines where thermal insulation is required and describes the details on the P IDs and line lists for piping instrumentation and equipment doc CWINTERIZATION DESIGN GUIDE PROCEDURE NO PTD-DGS - REV DATE PAGE OF June The Mechanical Engineer prepares the speci ?cations for insulation materials and thickness coordinates the winterizing insulation requirements with the equipment suppliers and reviews the P IDs vendor drawings to ensure the correct depiction of equipment requirements The Control Systems Engineer reviews the P IDs and instrument drawings to ensure the correct depiction of the instrument winterization insulation requirements doc CWINTERIZATION DESIGN GUIDE PROCEDURE NO PTD-DGS - REV DATE PAGE OF June Piping Design establishes the con ?guration details for winterizing pipe indicates the insulation and winterizing requirements on its drawings and assists in the ?nal review of winterizing and insulation design DEFINITIONS Process The term ??Process ? is used to denote the department group or engineer who develops the PFDs and P IDs The term ? Process ? could refer to Process Engineers Process Systems Engineers or Mechanical Systems Engineers doc CWINTERIZATION DESIGN GUIDE PROCEDURE NO PTD-DGS - REV DATE PAGE OF June Mechanical The term ??Mechanical ? is used to