(*) The Piping Classes Specification is a vital document in the project lifecycle.
(*) The Piping Classes Specification normally contains at least the following sections:
– General Overview
– Fluid List
– Wall Thickness Tables (Use KW Piping Calculators for Pipe Wall Thickness Calculations: KW Piping Calculators)
– Branch Tables
– Components Description
– Special Notes
(*) Many companies have their general Piping Classes that they use in almost all projects due to the similarity between projects, while many other companies create a piping class specification for each project.
(*) The creation of Piping Class Specifications requires in-depth knowledge in the areas of Codes, Standards, Industry Practices, and Manufacturers’ Practices.
(*) Piping Classes are involved in:
– 3D Model
– Technical Procurement Activities
– Inspection Activities
– PO Preparation and others
– and more…
(*) The selection of Base Material is the responsibility of the Material Selection and Corrosion team and/or the Process Team based on the company’s philosophy.
(*) Each Piping Class contains a list of Piping Components that are selected and prepared to be used by the Piping Designer or Piping Design Engineer during their design work.
(*) When mentioning Selection, we mainly refer to:
– Type of Construction
– Type of End Connection
– Design and Dimension Standard
– Material Standard
– Testing Standard
– and more…
(*) Each Material Standard (e.g. ASTM standards) has a different set of requirements. Some Material Standards only cover Seamless types, while others cover both Seamless and Welded types. Additionally, some of them cover a certain type of welding. Therefore, the Specs Engineer must fully understand the Material Standard before specifying it.
(*) Each base material has a different set of grade combinations based on the forms and alloys. This should be understood by the Specs Engineer. For example, if the Pipes material is ASTM A106 GR.B, you should be aware that the Forged form will be ASTM A105, the Wrought form should be ASTM A234 GR. WPB, and the Casting form should be ASTM A216 GR. WCB.
