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Piping Checklist for 30% 3D Model Review

In all the EPC project which are been executed on 3D model, it is planned to have 3 formal model reviews at Stages 30%, 60% and 90% of design completion. These stages are linked to the project schedule in respect of the supply of engineering information from upstream disciplines (Process, Mechanical, Instruments etc.) being at a status of Preliminary, Intermediate and Final.

The objective of model review is to “freeze” the design at each of these stages, i.e. once comments from a specific review are resolved, the scope of facilities covered in that review will be frozen.

Below is the piping check point which shall be reviewed prior to 30% 3D model review:

Sr. No Check Points

General and layout related:

1 Major underground piping systems including pressurized and gravity lines are modeled and checked.
2 Major large bore and critical process piping determining the equipment location are modeled and checked.
3 Pipeline within plant area is modeled and checked.
4 Pipe racks, tracks and sleeper ways are modeled and checked.
5 All technological structures and platforms are modeled as simple outline and checked.
6 All Process equipment on equipment list are modeled as per data sheet/preliminary vendor drawings and checked. Packages modeled as boxes.
7 Nozzles, Manholes & associated platforms for static equipment are modeled and checked for orientations and Location.
8 Roads, main access ways are modeled and checked.
9 Dropout/laydown areas and davits are modeled and checked.
10 Bundle pulling areas are shown and checked.
11 Mobile and permanent maintenance equipment access area is modeled and checked.
12 Space for Construction and erection access is shown as translucent boxes.
13 Escape routes on grade and platforms are shown and checked.
14 All Ladders and stairs are modeled and checked.
15 Spray water rings on the static equipment in the required number and location are modeled and checked.
16 Concrete slabs and paving are modeled and checked.
17 Outlines of all Buildings is modeled and checked.
18 Major equipment structures, foundations are modeled and checked.
19 Shelters are modeled and checked.
20 Major underground drainage/sewage systems are modeled and checked.
21 Bund walls / fire wall is modeled and checked.
22 Space reservation for main electrical, instrumentation and telecom cable trays on racks is shown and checked.
23 Main electrical, instrumentation and telecom cable trenches, corridors are modeled and checked.
24 Fence gates, emergency exits are modeled and checked.
25 Muster point is modeled and checked.
26 ESDV conceptual location are modeled and checked.
27 Space for future facilities is modeled and checked.
28 Battery limit interfaces with others is shown appropriately and checked.
29 Spacing/inter distances between the equipment/structures are checked.
30 All critical piping requiring slopes and no pockets as per process requirements are checked.

31 Hard Standing Areas are defined and properly located and checked.
32 The major equipment/tech. structures constructability have been checked.
33 The requirement for operation, maintenance and access on equipment, structures, shelters and buildings has been checked.
34 Space for loading/unloading of catalysts, pickings, internals for columns/reactors provided and checked.
35 Modular design projects are checked for installation path modular envelops and modular setout points.
36 Thermo siphon re-boiler elevation checked with draw-off pan elevation
37 In case of Brown field the existing information is modeled and checked.
38 Interdisciplinary model review is conducted and all the comments are resolved

Safety and operation & maintenance related:

39 All escape route paths are obstruction free and no walk way has got head bumpers or tripping hazards.
40 All the exits through escape routes are going away from a main process area.
41 Proper opening/space is available for cranes to enter and maneuver.
43 All man-ways are within the reach of the crane/hoisting equipments esp. for vertical vessels and columns, etc.
44 Proper space on platform is available for turning the man-way covers and entering the equipment.
45 Accessibility for maintenance and operation of spectacle blinds is checked esp. if associated with equipments.
46 Adequate space for bundle pulling and transportation of bundles is kept for heat exchangers.
47 The removal of pump is not hindered due to configuration of connected piping.
48 The straight length requirement in the suction line for side suction and discharge and double suction pumps. Also ensure the accessibility to RS spool, valves and connected instruments around the pumps.
49 Remote shutdown devices (emergency shutdown valve) are located at safe place.

Mechanical Handling Related:

50 The adequate clearance availability for the maintenance and removal of rotors/shafts/internals etc (including the installation of temporary rigging beams, hoists, chain falls, etc.) is checked.
51 Requirements for equipment removal hatches and construction opening in floors, walls and roofs have been identified and shown.
52 Accessibility for mobile crane for maintenance of equipments (e.g. re-boilers, air coolers, exchangers on technological structures, etc.)
53 Adequate lay down areas are identified and located for use with cranes, gantries and monorails.
54 The equipment/heavy items dropdown area have been identified and located specially for Columns, Vertical Vessels & tech. structures etc.
55 The location of the local compressor panel is checked for operation and maintenance point of view.
56 The location of compressor lube oil system & seal oil tanks, etc. has been checked with respect to vendor specific requirement, if any.

Safety Specific requirement:

57 Location of fire hydrants, monitors of firefighting equipment are shown and reviewed.
58 The proper escape routes are provided from elevated equipment’s and all platforms.
59 The fire protection system deluge valve, hose racks, etc. have been identified and located in accordance with applicable design guidelines, codes and standards.
60 All locations are reachable by a fire truck if one road is blocked.
61 The fuel system day tanks located outdoors with sunshades as per Project specifications, if applicable.
62 The fuel unloading facilities, storage tanks etc. shall be enclosed with bunds, dykes and/or curbs with spillage collection sump as per project specification, if applicable.
63 At truck unloading facilities, the dimensions of vehicles being used have been verified to ensure that proper vertical clearances, width, and turning radii have been considered.
64 At least two exits as per the safety requirements are present on platforms which will be used regularly (esp. platforms on technological structures and underneath the air coolers etc.)
65 The drop out zones and davits are identified & modeled as translucent boxes.
66 All fire water deluge manifolds are safely located in relation to the equipment they are protecting.
67 Transportation of equipment through existing plants reviewed. (Brownfield only)
Prepared   Reviewed (Area Engineer)   Approved (Model Manager)
(Lead Designer)          

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