The Hanger Catalogue

The Hanger catalogue is analogous to the Piping catalogue. Components are created in much the same way, using the element types PCLA (Pipe Clamp), HELE (Hanger Element), ROD, and SCLA (Steel Clamp). You are advised to study the sample catalogue provided by AVEVA, together with these notes, before creating your own catalogue components.

Component Point Sets

In general, arrive and leave p-points should be in the same direction as the axes about which the component can be rotated at the respective ends. For variable height components, the positions of arrive and leave p-points should be related to the distance between the leave of the previous and the arrive of the next, and not the actual height. If a maximum or minimum distance is applicable to the component, p-points should be provided from which this distance can be measured.

Bores

For hangers, the PBOR attribute is interpreted as the equivalent hanger rod diameter. It is valid to have a zero-bore rod and still successfully use the CHOOSE command. Items which are not sized by rod (or pin) diameter or which do not have a concept of rod diameter (such as pipe shoes and welded attachments) should have PBOR set to zero. In such cases, the system will not attempt to set the LSRO attribute of the component.

Pipe Clamps (PCLAs)

Pipe clamps should always have their P1 pointing in the direction of flow in the pipe as this is the direction used for the hanger head. For PCLAs to be used on implied tube, the P2 will be perpendicular to the P1. For PCLAs to be used on piping components (e.g. ELBOs) the P2 will be opposite in direction to the P1. The PBOR of the pipe end of the PCLA (P1) should be set to the equivalent nominal bore of the pipe. Some PCLAs (such as U-Bolts) can be applied to sloping pipes and the angle between the P1 and P2 will be variable. In such cases, put the DDANG on the P2.

Steel Clamps (SCLAs)

A p-point should be provided which will be used to orientate the SCLA with respect to the steelwork to which it is attached. The direction should be that of the attached steel when connected to the flange.

Material Texts

The supplied catalogue uses the XTEX attribute of HMTE elements to store material data

Detail Texts

The supplied catalogue uses the RTEX attribute of HDTE elements to store long descriptions of components for drawings, etc.; the STEX attribute to store concise ordering codes for MTO; and the TTEX attribute to store details of additional items which form part of the component but which need to be ordered separately.

Datasets

The Hangers & Supports application makes great use of the catalogue Datasets. The following rules apply to their use.

For Datakeys which tell the appware to set certain Design Parameters:

• The PPROP attribute must be set to an expression which gives the value of the design parameter; for example, (ATTRIB DESPARA[1]).

• The PURP attribute must be set to DESP.

• The NUMB attribute must be set to the number of the relevant design parameter.

The following Datakeys are reserved for use by the application and have the special meaning shown:

(* These values are calculated from the ‘Rod take-out values’ of the Prev/Next components and represent the distance between the P1/P2 points and the actual ends of the component.)

Datakeys which give information either to Model appware for sizing purposes or to Automatic Drawing Production (ADP) appware for drawing data etc. are usually set to component parameters or hard data. The PURP attribute is set to PARA to indicate that, while the information is used by the Model appware, it is not required for ADP or MTO:

(# These values represent the distances from P1/P2 that attached rods should extend in the ‘fitted’ position.)

Other Datakeys may be defined as a means of forcing an ADP application to output database information on drawings and MTO lists. The PURP attribute of these Datakeys should be set to DATA. The following settings of this type are used in the supplied catalogue:

Naming Conventions

A naming convention for catalogue components has been developed following the conventions of the ISOCAT style in use by AVEVA and a number of customers for many years. This convention is detailed later in this section.