Set Hangers and Supports Conventions

Design Conventions for Catalogues and Specifications

Set Hangers and Supports Conventions

Set Hangers and Supports Conventions

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.

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.


P-Point	Connection Types:
NONE	No connection
WELD	Welded connection
FPIN	Female pin
MPIN	Male pin
BOLT	Bolted connection
RHOL	Right-hand-threaded hole
RROD	Right-hand-threaded rod
LHOL	Left-hand-threaded hole
LROD	Left-hand-threaded rod
CLAM	Clamped connection
HOLE	Hole (for rod)
FSWA	Female spherical washer
MSWA	Male spherical washer

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

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, etc.; and the TTEX attribute to store details of additional items which form part of the component but which need to be ordered separately.

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:

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

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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:


POD	Pipe outside diameter (e.g. for lugs)
SWID	X -width of attached steel section (SCTN)
FLTH	Flange thickness of attached steelwork
CRAD	Component bend radius (e.g. for lugs/trunnions attached to bends)
RINA	Rod insertion distance at P1 *
RINB	Rod insertion distance at P2 *
VSLO	Variable spring load (Note: PUNIT attribute should be set)
VSEX	Variable spring extension/compression distance
DATA	A special case where the design parameter is not set automatically, but rather prompts the user to enter the data.

(* 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 ADP (automatic drawing production) 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:


RTVA	Rod take-out value at P1 #
RTVB	Rod take-out value at P2 #
THLA	Thread length at P1
THLB	Thread length at P2
VSPR	Variable spring rate (units as set for VSLO)
MNLO	Minimum load in working range
DHEI	Loaded default height (for components which are adjusted, regardless of load, to a fixed height)

(# 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:


OLEN	Component overall length
HEIG	Height
DIMA	Dimension A (as defined in the paper 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.

1974 to current year. AVEVA Solutions Limited and its subsidiaries. All rights reserved.