Welds - Intergraph Spoolgen - Help

Intergraph Spoolgen Help

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English
Product
Intergraph Spoolgen
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SmartPlant Foundation / SDx Version
10
I-Configure Version
6.0(2016)
Isogen Version
13.0(2016)
Smart Isometrics Version
7.2
Spoolgen Version
9.2

Placing welds is a common task used to break the pipeline into spools. You can add new welds or edit existing welds to define spool breaks. Inserting a field weld, or modifying a workshop weld to/from a field weld, affectively splits the existing spool into two or more spools. The software assigns a new spool number to the resulting spool based on the highest existing spool number in the current pipeline. The example below shows a pipeline that consists of four spool assemblies:

Spool-based splitting

If you make a modification to the pipeline by inserting a weld half-way between the pipe in SPOOL-B, the software responds by splitting that spool into two separate spools and assigning the new spool the name SPOOL-E, as shown in the example below.

Spool-based splitting B

Deleting a weld also affects spool contents. The software attempts to merge the two spools into one and assigns the lowest number, as well as the inherit attributes, to the merged spool.

  • Changing the category of a component to Erection results in splitting the existing spool.

  • Use Tools > Reassign Spool Identifiers to clear all existing spool names and reallocate the spools using the naming settings defined in I-Configure. For more information about these settings, see Define spool import settings using a drawing style.

  • At any time, you can click Update Curent View Update Current View to refresh the display of spool assemblies in the Pipeline Explorer and the Graphics window.

  • Pressing Ctrl+Shift during weld placement snaps the weld to the end of the pipe. Also, if there is ann open end at a fitting, such as a reducer, you can use Ctrl+Shift to place a weld there.

The commands on the Welding menu or the Welds toolbar allow you to place a weld in the pipeline. However, before you can place a weld, it must first exist in the materials database. The sample database delivered with the software contains most types of welds. If the type of weld you want to place does not currently exist in the database, you can use Material Editor to add it. For more information about adding materials, see the Material Editor Help.

Types of Welds

The following table lists the types of welds. The corresponding Isogen symbol key (SKEY) for each weld type is in parentheses.

Place Site Weld

Weld Site (WS), Weld Site Workshop Test (WSST), Tack Weld for Site (WST), depending what you select in the Weld Type list.

Place Workshop Weld

Weld Workshop (WW), Weld Workshop Shop Test (WWST), depending what you select in the Weld Type list.

Place Offshore Weld

Weld Offshore (WO), Weld Offshore Shop Test (WOST), Tack weld for Offshore (WOT), depending what you select in the Weld Type list.

Place Field Fit Weld

Weld Field Fit (WF), Weld Field Fit Shop Test (WFST), Tack Weld for Field Fit (WFT), depending what you select in the Weld Type list.

Place Offshore Field Fit Weld

Weld Offshore Field Fit (WOF), Weld Offshore Field Fit Workshop Test (WVST), Tack Weld for Offshore Field Fit (WOFT), depending what you select in the Weld Type list.

Weld Type List

Weld Type List changes the type of weld for each of the previous five weld types. You can select Normal, Shop Test, and Tack.

Place Special Site Weld

Special Site Weld (WWSP)

Place Workshop Automatic Weld

Automatic Weld (WWA)

Place Support Weld

Support Weld

Site Weld

A type of weld that is fabricated during erection on-site. Although the pipe is cut to the correct length and prepared for the weld in the workshop, the weld itself is actually added on-site. When editing the pipeline in Spoolgen, site welds are the most commonly used. Their main purpose is to create pipe spools by adding site welds at workshop weld positions in the pipeline. You can also add a site weld directly into a piece of pipe. In these cases, you must specify a reference point for the location dimension.

A site weld is also known as a field weld or erection weld.

Workshop Weld

A type of weld that is done by the fabricator in the workshop. The Weld - Workshop Weld command is used to do the following:

  1. Add a workshop weld in a piece of pipe, which requires that you specify a reference point for the location dimension.

  2. Change a site weld into a workshop weld. The change is saved to the POD file when editing is complete, and the file is saved.

  • Because most welds in a pipeline are usually workshop welds by default, the Weld - Workshop Weld command has limited use.

  • A workshop weld is also known as a fabrication weld.

Offshore Weld

A type of weld that is fabricated during erection offshore. Although the pipe is cut to the correct length and prepared for the weld in the workshop, the weld itself is added offshore. The practice is similar to that of a site weld, except that the weld is classified as an offshore weld.

Field Fit Weld

A type of weld that is performed on-site. For this type of weld, the pipe is prepared in the workshop slightly longer than needed and an allowance added. The pipe is cut to the exact length on-site before the weld is added. A field fit weld is also shown with the text FFW next to the weld. You can set the actual value of the allowance in the project as a default or on the fly for each field fit weld. Alternatively, you can use I-Configure to define a project setting that shows the additional in the dimension text. For more information about using I-Configure, see the I-Configure Help.

Offshore Field Fit Weld

A type of weld that is fabricated during erection offshore. For this type of weld--because the exact length of spool is unknown--the pipe is prepared in the workshop slightly longer than needed. The pipe is cut to the correct length and prepared for the weld on-site (offshore), before welding actually occurs. The process is similar to that of the offshore weld except an add-on allowance of 150 mm (6-inches in Imperial units) is added to the associated cut pipe length. Also, the default text FFW is output on the isometric pointing to the weld.

Shop Test Weld

A type of disposable weld that is used specifically for testing purposes, such as pressure testing. This type of weld also carries an allowance. It is a separate value to the FFW.

Tack Weld

A type of weld that is used to indicate components that are loosely attached during fabrication, with the final weld being done on site. Tack welds are used in conjunction with the other type of main welds by selecting the Tack Weld option on the Weld Type list on the Weld toolbar.

Special Site Weld

A type of weld that is used for a pipeline that has a long straight that needs to be broken into standard lengths. Special site welds are unique in that, unlike a site weld, they do not break the spool. As such, if it is unnecessary to produce a spool for each single length of pipe you can use a special site weld.

Automatic Weld

A type of butt weld that is made using a welding machine.

Support Weld

A type of weld that falls into one of the following categories:

  • Fillet Welds - Using the Add Support Weld dialog box, you can place up to nine fillet welds per support. You can also define the category and schedule for each fillet weld.

  • Trunnion Welds - You can also use the Add Support Weld dialog box to place four different types of trunnion welds. Prior to placement, you can define an angle for the trunnion, as well as a weld for the optional end plate.

Add Support Weld dialog box

 

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