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Piping Checklist for 90% 3D Model Review

90% 3D model review is a final review in 3 sets of model reviews, 30%, 60% and 90%. 90% 3D model review held when the 3D model has basically been completed. This occurs when all equipment, piping, valves, instruments, electrical, structural and other items have been modeled in 3D environment. In this review, the items to be reviewed will include such things as the location and orientation of valve hand wheels for operability, the location of local instruments for maintainability.
Agreement on the location of all these critical items should precede the start of piping isometrics EXTRACTION or the preparation of instrument location plan drawings, if required.

Below is the piping check point which shall be reviewed prior to 90% 3D model review:


Check List for 90% Model Review

1 The comments of 60% model review are closed.
2 Inter discipline model review is conducted and comments of the same are incorporated.
3 All Equipment checked to IFC Vendor information.
4 All piping modeled including piping below 2”
5 All Pipe supports are modeled and checked
6 All Stress comment incorporated and checked
7 All Steel Structures are completed and checked with respect to IFC drawings
8 All Buildings are completed and checked with respect to IFC drawings
9 All Foundations are completed and checked with respect to IFC drawings
10 All Online, Off-line and equipment mounted Instruments are completed and checked with respect to approved vendor drawings.
11 All Telecom items including CCTV’s, PAGA speakers are shown and checked
12 All Lighting fixtures are completed and checked.
13 All electrical panels / Distribution Boards are completed and checked.
14 All Fire & Gas Equipment is completed and checked
15 All U/G facilities completed and checked.
16 Any exclusion from 60% model review is incorporated and checked.
17 All Utility Stations are identified, located and checked for the maximum length of hose with proper access.
18 All Safety showers and eye baths are identified, located and checked with proper access.
19 Location of mobile and portable /manual firefighting equipment are shown and checked.
20 All Sample connections are identified and modeled and checked for proper access.
21 The minor access platforms, if any are located and checked for proper access.
22 The offline instruments including analyzer enclosures/panels etc. are modeled at proper locations and checked.
23 The fire and gas detectors are shown and location of each is checked by HSE for function and by piping for obstruction.
24 The cable routing inside the building is complete and checked so that it is not obstructing any movement of crane or walkways.
25 All the instrument stands and supports are checked so that they are not obstructing the walkways on the platforms especially in case of platforms located on vertical vessels and columns.

26 Location of junction boxes is checked so that they are not obstructing the walkways.
27 Junction boxes/fire boxes are modeled with volume for door opening and does not enter into the hard standing/access areas located for crane/walkways, etc.
28 Cable conduits are checked so that they are not coming out in the middle of the road/ walkways.
29 Ensure that arrangement of small bore piping has been done in such a way that the pipe support is provided to prevent the breakage due to vibration.
30 Ensure purging connection is provided at the dead end of flare header.
31 Ensure that cooling water lines branch off from the header from top.
32 Ensure that there are no valves installed with the stem pointing below the horizontal plane in downward direction.
33 Ensure that the vents from an analyzer house/cabinet are located and routed to atmosphere at safe height from grade.
34 The vents of seal chambers of reciprocating compressors are properly routed and supported.
35 Unloading and storage of chemicals and additives is reviewed for any environmental impact.
36 Vendor trim piping around equipment is put in the model and checked.
37 Ensure Toe plate is modeled properly at platform opening.
38 Check that the Siren/safety alarm system is installed at top of highest building and at the centre of plant area.
39 The proper lighting poles and fixtures etc. are shown and checked.
40 The safety equipment like wind socks, breathing apparatus are strategically located as per escape and safety equipment layout.
41 The routing of branch cable trays to the instrument and support for the same is properly shown and checked.
42 The parking area, traffic barriers, boulders, etc. as applicable is modeled and checked.
43 Steam tracing manifolds and steam jacketing details are shown in model and checked.
44 All design change notices (DCNs) are taken care with respect to completeness.

Instructions for filling the check list for 90% model review:

1. This list is not intended for use in milestone reviews, it is for ensuring that the model is ready for the mile stone review and therefore it is required to be completed and signed before proceeding for milestone review.

2. Many check points in the check list do not specify the criteria or basis for checking. The points are listed with the intention to cover the full scope of model and that there are no miss-outs before proceeding for mile stone review. Separate check prints of points need to be maintained by Area Designers, Lead Designers and Area engineers to support the readiness of the model review.

3. This check list is to be prepared by piping Lead Designer for each area or WBS separately.

4. Though this check list is prepared by piping Lead Designer and checked by piping Area Engineer, it requires input from many disciplines. In such cases the piping lead designer has to obtain the confirmation from the designer of the respective discipline.

5. The Model Manager is the approver for the list.

6. The signed copy is to be preserved for record.

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