Installation Detail Drawings – Comprehensive I&C Engineering Checklists for EPC Projects

Installation Detail Drawings — Final Self-Verification Checklist

Use this before the first formal review (internal/external). Applicable to instrument stands, local panels/JBs, analyzer skids/shelters, instrument air sets, penetration details (MCT), small-bore tubing, and electrical/mechanical fixings.

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Header & Document Control

Title and document number follow project standard; “Installation Detail” identifies tag(s)/equipment, unit/area, sheet X of Y.
Revision and purpose (IFR/IFA/IFC/IFD) correct; prepared/checked/approved names & dates completed; change log updated.
References listed with numbers & revs (P&IDs, GA/Plot Plans, Structural/Architectural, Hook-Ups, Termination/Loop, Tray/Trench, Area Classification, Earthing/Lightning, Vendor drawings, Client standards).

Scope & Basis of Design

Scope clearly states what is covered (stand/pedestal, panel/JB mounting, penetration/MCT, small-bore tubing, air set, heater/trace, weather hood) and what is excluded (vendor internals, large-bore piping).
Design basis/standards cited (project + applicable IEC/ISO/ASME/ASTM/NACE/EN/NFPA/local authority); client deviations captured in notes.

Location, Orientation & Elevations

Coordinates/levels tie back to GA/3D model; north arrows and grids shown; clear distance to obstructions/door swings/egress maintained.
Orientation of instruments/panels supports readability, drainage and access; required sightlines and display angles acceptable.

Supports, Foundations & Fixings

Support type defined (stanchion, wall bracket, Unistrut, skid frame, pedestal) with member sizes, base plate, gussets, and anchor/bolt details.
Fixing method correct (cast-in bolts, chemical anchors, welded lugs) with grade/size, embedment and edge distances; concrete strength/steel grade stated.
Deflection/vibration limits considered; seismic/wind/snow (if applicable) addressed; lifting/installation sequence feasible.

Materials, Coatings & Corrosion Protection

Material specs listed (SS316/316L, CS, FRP, alloy) for all parts (stand, fasteners, brackets); galvanic compatibility considered with isolation where required (nylon/EPDM pads).
Coating/finish specified (HDG, paint system DFT, passivation); offshore/onshore salt/sand/UV exposure addressed; CUI precautions near hot lines noted.

Process Connections & Piping Interface

Nozzles/tappings/valve manifolds depicted per Hook-Up; ratings, MOP and materials match line class; reinforcement/weldolet/pad details present if new tapping.
Thermowell insertion, clearances and removal space shown; orientation prevents liquid traps/gas pocketing as applicable; drains/vents routed to safe location if required.

Tubing / Impulse / Pneumatic Details

Tubing size/material and fitting type per spec; slopes and equal lengths for DP maintained; high-point vents/low-point drains and bleed/test points accessible.
Clamp spacing, bend radii, and separation from hot/vibrating services respected; tubing supports tied back to structure; ID ferrules/labels indicated.
Pneumatic air set (filter/regulator/gauge/lock-up/booster) configured per typical; drain routing and condensate management shown; fail action noted.

Electrical Installation (Cabling, Glands, Conduits)

Cable entry orientation and gland plate layout shown; gland types/sizes rated (A1/A2, barrier, Ex d/e, IP/NEMA); unused entries with rated stopping plugs.
Conduit/tray/ladder connection points and supports shown; bends and pull-box spacing within limits; flexible/EMC glands used as specified.

Earthing, Bonding & Lightning

Protective earth studs/lugs shown for instruments, stands and panels; conductor sizes/IDs indicated; clean earth/IS bonding points identified where applicable.
Shield/armour termination philosophy followed (single/both ends); separation from lightning down conductors maintained; bonding jumpers across mechanical joints provided.

Penetrations, Sealing & Firestopping

MCT frames/sleeves sized for installed + spare cables/tubes; filler modules schedule shown; fire/flood/gas rating per wall/floor type indicated.
Weather hoods/canopies/drip loops specified where outdoors; IP rating preserved; sealing compounds compatible with cable jackets.

Access, Maintainability & Ergonomics

Mounting height and approach allow calibration, valve operation, display reading and instrument removal without special dismantling or unsafe posture.
Platforms/handrails/ladders shown if needed; clearances to walkways/escape routes/HVAC intakes maintained; hazardous media vents directed safe.

Hazardous Area & Environmental Compliance

Zone/Division, Gas Group, Temp Class, EPL and ambient range compatible with devices, glands and accessories; labels/markings per standard.
Materials and fasteners suitable for environment (sour/Cl⁻/marine/UV/sand); insulation/fireproofing interfaces detailed; drainage away from enclosures.

Fabrication Notes, Tolerances & QA/QC

Weld symbols/sizes, prep and inspection (VT/MT/PT as required) defined; cutting/drilling tolerances and site-fit allowances stated; sharp edge protection addressed.
Torque values, sealing compounds, test pressures (leak/IR/continuity), and inspection/hold points listed; preservation/packing for pre-fab assemblies noted.

Drawing Quality, CAD/BIM & Coordination

Views (plan/elev/section/details) and dimensions complete; text/lineweights legible; no overlaps or clipped notes; title block and sheet index correct.
Clash check vs piping/steel/HVAC/electrical performed; tray/pipe supports coordinated; continuation arrows and callouts resolve to correct sheets and models.

MTO / BoM & Labeling

Bill of Materials complete: supports, fasteners, brackets, glands, MCT modules, tubing/fittings, FRL/regulators, heaters/tracing, weather hoods; part numbers/spec codes shown.
Tag/label plates specified (text, size, material, color); signage/marking for hazards and lifting points included; spares/consumables allowances identified.

Notes, Attachments & Final Polish

Open items/assumptions listed with owners & dates (e.g., anchor approval, thermowell calc, vendor bracketry); closure plan noted.
Attachments referenced with document numbers/revisions (typicals, vendor GA, 3D snapshots, calc sheets, method statements); PDFs export with selectable text; print areas/page breaks set.
Consistency scan vs P&IDs, Hook-Ups, Termination/Loop, Cable/Tray layouts, Earthing, and Area Classification complete; confidentiality/footer/transmittal correct.

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Use this checklist before issuing the Installation Detail Drawings for first formal review.

Tagged Engineering Deliverable Check List

Installation Detail Drawings – Comprehensive I&C Engineering Checklists for EPC Projects

Installation Detail Drawings — Final Self-Verification Checklist

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