What is Piping Specifications
The Piping Specification is a document prepared during the design phase of any project. It provides the appropriate selection, specification and material grade of pipe and piping components for a given service. For all subsequent maintenance and repair on a section of pipe, the piping specification remains as the key to correct material selection.
Before commencing any job, reference to the piping specification is essential to specify and use the correct materials. For the job check that you are using the latest revision of the specification.
Do not rely on “what was installed before must be right” as this is not always the case! If a discrepancy is found, it should be reported.
Note that a piping specification only applies to the defined plant, site or installation. Forties, Magnus, Dimlington Terminal for example each have their own piping specifications and they are NOT interchangeable. To use the piping specification, reference must first be made to the Process and Instrument Diagram. Identify the section of pipe in the
P&ID and a line number will be quoted, e.g:
8’’-WF-1007-1A1E which is interpreted as follows:
8’’ - The nominal pipe size of the line.
WF - The service code. This refers to the contents of the pipe. In this instance,WF refers to Fire Water .
1007 - The pipeline number which is a unique number allocated to a specific section or run of pipe during the design stages.
1A1E - The piping specification number. This is a short-hand reference into the piping specification document, and is
also unique to that document. The letter normally refers to the pressure rating of the system.
Having determined the piping specification number , turn to the appropriate page in the piping specification document. There the correct type of gasket, the correct grade of studbolts, spectacle blinds, blind flanges, pipe material, pipe wall thickness and much more will be specified for the job in hand.
Reference : BP Amoco Piping Joints Handbook (Document No. D/UTG/054/00)
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