Piping isometric dwg

Standards, as applicable.The correct isometric revision number is mentioned in the title block.Pipe class printed at the bottom of the drawing matches that in the line number.Line data (e.g. process parameters, P&ID no., PWHT & testing requirements, insulation & painting specs, etc.) match with the Line List, if given in the isometricApplicable reference documents (e.g. Line List, Isometric Index, Pipe Supports Spec, etc.) are mentioned.Data such as inch-dia, inch-meter, etc. appear at the bottom of the isometric.The isometric print is readable (if required, the isometric should be split into more sheets).Dimensions and elevations are adequately given. At least one elevation is mentioned and WP elevations for sloped lines are marked.There are no HOLDs in the isometric (issue of any isometrics with HOLD requires approval by HOD/PEM).Online Video Course on Piping IsometricsIf you wish to explore more about piping isometrics, you can opt for the following online video coursePiping Design Engineering and Piping Isometrics MasterclassPiping Isometrics DemystifiedPiping Fabrication with IsometricsVideo Tutorial on Piping Isometric DrawingRefer to the following video tutorial for a better understanding of piping isometric drawing.*{padding:0;margin:0;overflow:hidden;}html,body{height:100%;}img{position:absolute;width:100%;top:0;bottom:0;margin:auto;}.play-icon{top:50%; left:50%; position:absolute; height:100px; width:100px; margin-top:-50px; margin-left:-50px;}.play-icon:hover{height:125px; width:125px; margin-top:-62px; margin-left:-62px}">Video tutorial on piping isometricFew more useful resources for you.Piping Design Basics- Isometric DrawingsTypes of Piping DrawingsSalient Points to check while reviewing Piping Isometric DrawingsJoin us on TelegramAnup Kumar DeyI am a Mechanical Engineer turned into a Piping Engineer. Currently, I work in a reputed MNC as a Senior Piping Stress Engineer. I am very much passionate about blogging and always tried to do unique things. This website is my first venture into the world of blogging with the aim of connecting with other piping engineers around the world.Recent Postslink to GRE Design Envelope and Failure EnvelopeGRE Design Envelope and Failure EnvelopeGRE Design Envelope (Failure envelope) is a 2-dimensional (2D) graphical plot of hoop stress

Project. For e.g. :For fabrication: To fabricate spoolsPlanner: To extract essential data for smooth planning and execution.Site Engineer: To Plan job as per priority, Erection of spool, Alignment, and Supporting.Procurement Team: To extract MTO for required material in the project.Billing Team: For the preparation of a bill to claim.To Know more about Piping Isometric, please follow our this Article Specially written about IsometricsChecklist for Piping Isometric drawingUnlike all other drawings, checking of Piping Isometric Drawing before the final release is the most important thing from a construction point of view. A correct error-free Piping isometric improves quality and saves time on the job. Most of the design companies follow a checklist to help Piping isometric checker. This checklist contains the following important points to look for:North direction markupLine numbers and Line specificationStart and Endpoint of Isometric with proper connecting details, coordinates, and ElevationBranch connection and other tapping points if applicable.Flow directionCorrect symbols for applicable fitting in isometric.Support location and Its tag numbers.Insulation details; If applicable.Flow direction.Instruments and Equipment tag number and connection details.High point vent and Low point drain for Hydrotest purpose.Details of Piping component its tag number, Size, specification, and standard codes.Slope or free-draining requirements.Drawing details of P&ID and GAD numbers.Details of any removable spool for maintenance purposes.Any special requirement of the piping system.Special piping components with Tag number and description.Special notes for stress critical lines.Status of Isometric. i.e. In Review or Released for constructionLatest revision number and cloud marking on changes from last revision.The requirement of electrical tracing.Difference Between GA and P&IDGADP&IDThis gives the actual direction of piping arangementPiping direction and layout can’t be determined with help of P&IDVarious information about dimensions can be obtainedNo information about dimensionEquipment nozzle details can’t be obtainedAll details about piping to equipment connection are presentGives info about Support type to be installedNo information about supportWe can prepare piping MTO from thisMaterial requirements can’t be fixedThe exact position of the pipe on the rack or unit can be determinedThis doesn’t give any information about the positioning of pipesConclusionYet all drawings are not in use at the same time but sometimes all those drawings need to bring together for better clarity and understanding of the piping system in the process plant. From the above article, we can conclude the following things for a better understanding of this article.A piping isometric drawing is co-related with P&ID, GAD, and PFD.Piping Isometric is not drawn on a scale.P&ID is a schematic diagram that gives information about the piping system connecting from one equipment to another and its flowPFD or process flow diagram tells us about state and chemical process details of the main equipment installed in the plant.General arrangement drawing or piping plan drawing is given a

New print after correction is “back checked” for incorporation.In the following paragraphs, We will provide a few checkpoints which must be checked by the piping isometric checker for proper quality.Piping Isometric ChecklistA Piping isometric checklist is a list of checkpoints that are ensured while checking the piping isometric. A piping isometric checker must ensure the correctness of the below-mentioned points in the piping isometricLine numbers (nos.)Line specificationsStart point locationEndpoint locationBranch connectionPiping ReducersPiping spec break in the proper location as per P&ID, if any (preferably be at flange joints/valves, each isometric (iso) to contain only one spec).Valve accessibilitySupport locationInsulation (for the insulated line only)Instrument connectionFlow arrowHigh point vent, low point drainHydro test vent and drainEquipment nozzle connectionNozzle numbers.Equipment numbers.Coordinates and elevationsNorth directionBill of materialValve tag numbers.Sample Piping IsometricInstrument tag numbers.Continuation sheets or isometric numbers.Grid location and numbers.Tag numbers of special items (if applicable).Slope/no pocket/free draining requirement, if any.Minimum or Maximum distance, straight length requirements, etc. as specified in P&ID.Close/open position for spectacle blind or spacer & blind.Removable spool pipe requirement, if any.The sequence of branch connections (as agreed with Process in case of any changes).The special feature of valves (e.g. LO, LC, etc.)Insulation symbol for insulated lines.Insulating gaskets are selected as shown in P&IDsSpecific requirements mentioned in applicable P&ID notes (if any) have been complied with.Documents Required for isometrics checkingBefore starting the piping isometric checking activity, the engineer must be ready with the following drawings or documentsPiping and instrument diagram (P&ID): From this drawing, we will get information like line number, line size, insulation, fluid commodity, special notes (like no pocket, requirement of spectacle blind in equipment nozzles, pressure head, specific straight length requirement for instrument connections), etc.Piping layouts and Sectional Drawings: Piping layouts will provide information on the pipe route, dimension, elevation, valve orientation, and coordinates.Equipment drawings: To check details

Piping Isometric drawing is one of the most important deliverables of the piping discipline as it provides complete information of the piping route to be erected at the construction site. So Engineers and Designers must be aware of the isometric preparation steps. In this article, a few of the salient points are discussed.Piping isometrics are the three-dimensional representation of the line.The main purpose of an isometric is to provide all information necessary for the fabrication and erection along with the bill of material required to do so.Isometric is also used to work out the exact MTO requirement.Generally, isometrics are prepared/extracted by the design group.A draft person (piping designer/engineer) who knows to read the piping GA. and is conversant with a drafting tool can draft isometric.Input required for piping IsometricsPiping PlanPiping SpecificationLine List (Process)Latest P&ID/PEFS (Process) (Issued signed copy)General Information about Piping Isometric drawingsAn isometric drawing covers a complete line as per the line list and P&ID. It shows all information necessary for fabrication and erection.Isometrics are not drawn to scale but should be proportional to easy understanding.Dimension is given relative to the centreline of the piping.The following information must be included in piping isometric drawings:Plant North: The direction should be selected so as to facilitate easy checking of isometrics with GA.Drawing number & revision.Reference number of PEFS (P&ID), GA drawings, line numbers, the direction of flow, and insulation tracing.Design pressure, design temperature, test pressure, testing medium, radiography requirement, Heat treatment requirement, painting requirement, and internal coating requirement.Coordinates of equipment against equipment layout.Equipment number & appearance on the isometric drawing.Line specification changes.Scope breaks.Changes in the direction and angles of the line should be clearly shown.Representation is correctly made in line with the standard symbols.Location and identification of all instruments.Requirements of upstream/downstream straight lengths. Insulation requirements as per PEFS (P&ID).Details and section

Identification match.“Match line” provision and accuracy.Accuracy of BOM in Isometrics.Weld points & field welds.Insulation class, Insulation thickness & Flow direction are indicated.Give the details of the flange on the equipment if the specification is different from the connecting piping.Size and type of every valve/direction of operation.Size and tag of the control valve.Field weld– Location.High-point vents and low-point drains.Special support like support from flange or welded supports details to be shown.If the line is stress-critical, stress analysis results are incorporated.All the symbols are used as per Legend.Slope showed as per P&ID/PEFS.Spectacle blind, spacer, and blind open/close position as per PEFS/P&ID.High-point vents and low-point drains have been provided for lines that will be hydro tested. (e.g. Instrument Air, Flare, and Nitrogen lines may not be hydro tested, but pneumatically tested).Orifice tapping orientation is as per instrument standards for gas and liquid lines.Flow direction for items such as check valves, globe valves, strainers, etc. is clearly marked.Isometric issued for Re-IFC to be marked with cloud and revision triangle.Insulation gasket demarcation is to be shown.General notes.Bill of Material.Tie-in numbers.Checking of Piping Isometric DrawingsChecking Piping Isometric Drawings before finally releasing them to the Construction team is very important. It minimizes errors and improves quality. Most of the design companies involved with isometrics prepare a piping isometric drawing checklist or isometric checklist to help Piping Isometric Checker in their activity. Also, many times piping isometrics are extracted directly from Piping Design Software. It is mandatory for the Senior Piping Checkers to check the piping isometrics thoroughly. In the tight schedule, It has to be ensured that the isometric drawings are released/ issued to clients with quality.Checking shall be done only on a hard print as per the color code procedure by an experienced engineer/designer. Normally checklists are followed to ensure the quality of the isometrics. The

After designing a complete 3D model on software like SP3D, PDMS, Autodesk, etc it is important to communicate the same information to the fabrication and construction team with enough clarity. Sometimes it is not possible to convey all the information through a single drawing. To resolve this problem designers developed many other drawings that can collaboratively give the required information to the end-user of drawings.In process or power piping mostly 05 types of drawings are developed which help the execution person to understand the concept developed by the designer. These drawings give information with help of:Schematics drawingsDrawings describing Basic design basis andSpecification for pipingIn this article, we will explore all those piping drawings that are required to execute piping work.General Arrangement Drawing (GAD)/Piping plan drawingProcess flow diagram (PFD)Piping and Instrumentation Drawing (P&ID)Plot plan layoutPiping Isometric drawingAt the end of this article, you will be able to understand and learn the following information about all drawing types frequently used in piping.What are these types of drawings drawing?What information do we get from each of these drawings?What checkpoint we must look for in every drawing?Is there any limitation of every drawing? If yes, what are these limitations?More to Read: What Is RF Pad? How To Calculate Reinforcement pad dimensions?Table of ContentsTypes of Piping DrawingBrief on GA drawing/Piping Plan drawing/Piping Layout drawingSome terminology frequently used in Piping GAD are:Information we gain from Piping General arrangement drawing/Piping Plan drawingLimitations of General arrangement drawing/ Piping Plan drawingChecklist for General arrangement drawingsBrief on Process flow diagram (PFD)Terminology frequently used for PFDInformation we gain from the Process flow diagramLimitations of Process flow diagramChecklist for Process flow diagramBrief on Piping and Instrumentation Drawing (P&ID)Information we gain from P&IDLimitations of P&IDChecklist for P&IDBrief on Plot plan LayoutInformation we gain from the Plot plan layoutLimitations of Plot plant layoutChecklist for Plot plan layoutBrief on Piping Isometric drawingTo Know more about Piping Isometric, please follow our this Article Specially written about IsometricsChecklist for Piping Isometric drawingDifference Between GA and P&IDConclusionFor planning and constructing a project, we need to refer to multiple drawings to extract all data required. A single drawing is never enough for defining the nature, scope, and layout of a project construction site. The types of piping drawing required are as follows:General Arrangement Drawing (GAD) or Piping Plan drawingProcess flow diagram (PFD)Plant and Instrumentation diagram (P&ID)Plot PlanPiping IsometricsBrief on GA drawing/Piping Plan drawing/Piping Layout drawingPiping General arrangement drawings or Piping plan drawings of either piping system or equipment are developed by piping designers with the vision of giving clarity of complete assembly of the piping system.These drawings represent the main dimension of the piping system using a 2D view of Top and side interface and sometimes the front view