It is easy,

-for lines up to 500 mm dia use 0.2 bar with "wind shape factor" = 1.5
-for lines above 500 mm dia use the same 0.2 bar but for "wind shape factor" = 1.875 (0.25/0.2 x 1.5)


There is another way but is more difficult to implement, to transform the pressure in uniform load

Best regards,