Design standards, typical standards & connecting details of the instruments to measure flow, pressure, temperature, level etc.Structural drawings of platforms, equipment supports & pipe bridge.Civil drawings like layout & details of buildings, columns, beams, foundations and drainage system.Process Equipment specifications and Equipment drawings.Overall plot plan and Area / Unit plot plan(s).The following are the data required to complete a GA drawing. Input required for generating piping General Arrangement drawing Usually, Tanks farms and cooling towers are located in the offsite area. Offsite behaves as a part of plant itself or an auxiliary service area for the plant area. The area apart of the plant area is called the offsite.It is the area, within the unit plot plan where some process is taking place. The area in which main equipment are located is called the plant area.The piping should satisfy the requirements of PEFS/ P&ID. The connecting details of equipment input & out put to other equipment or environment is called the piping.

The term equipment is given to the items listed in the equipment list and includes vessels, heat exchangers, reactors, tanks, columns, pumps, blowers, compressors, etc.Match lines are represented by co-ordinates in the horizontal plane and by elevation/ elevation ranges in the vertical plane. The matching line of boundaries of two drawings is called the match line.It may be the boundary of in plant area or an offsite. The battery limit is defined as the boundary of a plant area.Some terminology used in piping drawings are explained as follows. Then the lines from racks to equipment are drawn based on the best layout of lines. On the plot plan the piping routing is sketched free hand before beginning the drawings. The drawing shall contain all the piping and equipment in the area for which it is prepared. Sections are taken through the piping and elevations are drawn if so required by the client.

Plan view at different elevations are prepared.

The plan and section method is the conventional or classical drawing procedure of orthogonal projections. Piping GA drawings describe the arrangement of piping and may be drawn as plans and elevations. Having considered these factors, the number of flanges, fittings, valves and welds shall be minimized. Piping shall be routed so that the optimum piping layout is achieved in terms of process requirements, ergonomics, operation, inspection and maintenance. This post gives introduction to piping general arrangement drawings, like inputs required for generating any piping plans, presentation of piping plans, civil, structural details, instrumentation trenches, underground piping, supports, pipe racks etc. Introduction to Piping General Arrangement Drawings

Pdf piping isometric drawing