7/27/2019 Isometrics Check List
3/3
21. The corresponding continuation Isometric drawing number
should be indicated with each
continuation
DIMENSION PROCEDURE:
1. Every nozzle should be indicated X and Z axis reference
dimension and elevation (Y axis) with
each equipment or nearest column
2. Every terminal point should indicate with physical reference
dimension (X,Y & Z axis) with
nearest column.
3. End to end dimension must required even split up dimension is
there.
4. Do not match the support dimension with fitting to fitting
dimension. Support dimension
should take end of the each X-Z plane or elbow.
5. Location of the line with respect to column grid lines (X
&Z) . However the stand by
equipment of the line with respect to main equipment to be
indicated instead of grid lines.
Valve & Instrumentation Table:
Valve & instrument table to be indicated in the isometric,
Which contains
1. Total no of Instruments / valves as per P&ID
2. Orientation of valves & Instruments
General:
1 Design data should be right top cornor of the tittle block. If
it is IBR drawing IBR note should
come first.
2 Reference drawings of Project related to be indicated in the
Isometrics.
3 General notes as per IBR & N-IBR to be indicated in the
Isometrics
4 Drain & Vents notes to be indicated in the Isometrics
5 If it is orthographic Support Notes to be indicated in the
Isometrics
6 Holds for any incomplete/unverified information to be
indicated in the Isometrics
