It might have to do with the dlevel 6. I am not sure about it but below is an extract from the draft user guide part 1.
The STYL attributes, with their defaults, are as follows:
Tube flag TUBEF OFF Centreline flag CLIN ON Piping Symbol flag PSYM ON Obstruction flag OBSTF OFF Insulation flag INSU OFF Profile flag PRFG OFF P-line flag PLFG ON Drawing Level DLEV 0 Frontface Pen FFPEN Pen 1 Centreline Pen CLPN Pen 4 Backface Pen BFPEN OFF Obscured Pen OBPN OFF P-line Pen PLNP 5 Member line Pen MLNP OFF
TUBEF, CLIN, PRFG, PLFG, PSYM, OBSTF and DLEV are standard PDMS display representation controls and are not described here. (See the PDMS DESIGN Reference Manual for details.)
If INSU is ON, Piping Component Insulation will be drawn using the frontface pen (FFPEN). The outline of the piping Components will be hidden by the insulation in hidden-line views. If insulation and Components are required to be displayed, two similar views (that use different Styles) will need to be defined and superimposed
It might have to do with the dlevel 6. I am not sure about it but below is an extract from the draft user guide part 1.
The STYL attributes, with their defaults, are as follows:
Tube flag TUBEF OFF Centreline flag CLIN ON Piping Symbol flag PSYM ON Obstruction flag OBSTF OFF Insulation flag INSU OFF Profile flag PRFG OFF P-line flag PLFG ON Drawing Level DLEV 0 Frontface Pen FFPEN Pen 1 Centreline Pen CLPN Pen 4 Backface Pen BFPEN OFF Obscured Pen OBPN OFF P-line Pen PLNP 5 Member line Pen MLNP OFF
TUBEF, CLIN, PRFG, PLFG, PSYM, OBSTF and DLEV are standard PDMS display representation controls and are not described here. (See the PDMS DESIGN Reference Manual for details.)
If INSU is ON, Piping Component Insulation will be drawn using the frontface pen (FFPEN). The outline of the piping Components will be hidden by the insulation in hidden-line views. If insulation and Components are required to be displayed, two similar views (that use different Styles) will need to be defined and superimposed
