Types of Piping Drawings

//Types of Piping Drawings

Types of Piping Drawings

Piping design and drafting services involve the creation of detailed drawings that serve as schematic representations depicting the functional relationships in a pipeline system. The primary purpose of these piping drawings is to communicate the construction and fabrication requirements in a simple manner. The drawings are done in such a way that even a non-technical person can comprehend, understand, and execute the same.

Types of piping drawings:

To design the piping process, five types of drawings are developed in a sequence as follows,

  • Process flow diagram:

A process flow diagram is a schematic representation explaining the liquid transfer process inside the piping. It will explain the relationship between the different equipment and convey the fluid flow direction and connectivity between various equipment in the piping system. It will include the details such as fluid material inside each piping segment, flow rate, plant equipment requirements, capacity and operating information, specifications of basic parameters like pressure and temperature, critical valve requirements inclusive of control valves, and many more. It also explains the various tasks to be performed and denotes the need to repeat specific tasks to achieve the end goal.

  • Piping and instrumentation diagram:

A piping and instrumentation diagram, also mentioned as P&ID, is similar to a process flow diagram, except that it is more detailed. A P&ID is a single-line schematic diagram that includes all in-depth details of the instruments and controls, valves, line size, equipment, and pipe specifications. A P&ID shows accurate information about the physical sequence of reducers, branches, valves, instruments, and equipment. It serves as a guiding document that helps operate the piping system. It also serves as the master important document that carries all critical information required to develop other related engineering drawings like isometric or fabrication drawings of the same piping system.

  • Plot plan layout:

A plot plan layout, also known as a site plan drawing, is a schematic that shows the arrangement of the equipment and its supporting facilities like buildings, boundaries, structures, roads, utility runs, and pipe racks within the battery limit. It is used to understand the brief overview of the entire plant. The drawings are done at an adequately defined scale. Since the whole process plant with intricate details can’t be accommodated in a single drawing, the plot plan layout comprises two drawings, namely the overall and detailed plot plans. The former is like a city’s roadmap that shows the overall layout, boundaries, important street names, buildings, and parks, while the latter also includes details of the house numbers and each building.

  • 3D Modelling:

3D modelling is the process of adapting the 2D plans to their respective 3-dimensional versions. While 2D plans only help fetch a basic understanding of the layout, 3D modelling can help better visualise the actual scope of the design. 3D designs are understandable to even the members of the team who do not have sufficient knowledge of design and construction.

  • Piping isometric drawing:

Piping isometric drawings provide the complete details of the pipe route along with additional information on the equipment connections, piping components, support details and any special items required for the piping network. They also specify the type and scope of joints in the field of the fabrication shop. Piping isometric drawings are not on-scale drawings and are done in the form of single-line diagrams.

  • General arrangement drawings:

The purpose of the general arrangement drawings is to provide clarity on the assembly of the piping requirements. This is why they are synonymously mentioned as piping layout drawings. They show all the major equipment involved with their respective direction of placement. All main piping items including but not limited to fittings, valves, access ladders, instrumentation, and platforms leading to and from the equipment, are shown in the drawing. The top view with side elevations and sectional details like the direction of flow, line numbers, specifications, and sizes are usually shown in the drawings. This helps the design engineers fetch a clear idea to proceed with the next set of detailed drawings.

  • Bill of Materials:

A bill of materials is a comprehensive list mentioning the specifics, namely the materials, labour, and cost involved in constructing the piping structure. The information required to assess the same is gathered from the architectural drawings, blueprints, and different layout plans. Bill of Materials helps foresee the project’s requirements in advance so that the stakeholders involved have a clear picture to plan the execution, leaving no scope for errors.

At Prozus, our expert team understands the crucial importance of the drawings mentioned above in executing and running the piping system to achieve the desired goals. Hence, we ensure that they are keenly completed with utmost precision making them error-free and execution-ready.