Sets of drawings Mechanical systems drawing

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1 sets of drawings

1.1 united states

1.1.1 arrangement drawing
1.1.2 assembly drawing
1.1.3 detail drawing


1.2 fabrication drawings
1.3 united kingdom

1.3.1 tender drawings
1.3.2 sketch drawing
1.3.3 schematic drawing
1.3.4 detailed design drawing
1.3.5 installation drawing
1.3.6 record (as installed, as-built) drawing
1.3.7 builder s work drawing

1.3.7.1 design stage
1.3.7.2 installation stage









sets of drawings
united states
arrangement drawing

arrangement drawings include information self-contained units make system: table of parts, fabrication , detail drawing, overall dimension, weight/mass, lifting points, , information needed construct, test, lift, transport, , install equipment. these drawings should show @ least 3 different orthographic views , clear details of components , how assembled.


assembly drawing

the assembly drawing typically includes 3 orthographic views of system: overall dimensions, weight , mass, identification of components, quantities of material, supply details, list of reference drawings, , notes. assembly drawings detail how component parts assembled.


an assembly drawing shows order product put together, showing parts if stretched out. welder understand how product go idea of weld needed. assembly drawing contain following; information overall dimensions, weight , mass, identification of components, quantities of material, supply details, list of reference drawings, , notes.


detail drawing

in detail drawings, components used build mechanical system described in detail show designer s specifications met: relevant codes, standards, geometry, weight, mass, material, heat treatment requirements, surface texture, size tolerances, , geometric tolerances.


fabrication drawings

a fabrication made of many different parts. fabrication drawing has list of parts make fabrication. in list, parts identified (balloons , leader lines) , complex details included: welding details, material standards, codes, , tolerances, , details heat/stress treatments. , also


united kingdom
tender drawings
sketch drawing

line diagrams , layouts indicating basic proposals, location of main items of plant, routes of main pipes, air ducts , cable runs in such detail illustrate incorporation of engineering services within project whole.


schematic drawing

the schematic line diagram, not scale, describes interconnection of components in system. main features of schematic drawing show:



a 2 dimensional layout divisions show distribution of system between building levels, or isometric-style layout shows distribution of systems across individual floor levels
all functional components make system, i.e., plant items, pumps, fans, valves, strainers, terminals, electrical switchgear, distribution , components
symbols , line conventions, in accordance industry standard guidance
labels pipe, duct, , cable sizes not shown elsewhere
components have sensing , control function, , links between them—building management systems, fire alarms , hv controls
major components, whereabouts in specifications , other drawings can determined

detailed design drawing

a drawing intended locations of plant items , service routes in such detail indicate design intent. main features of detailed design drawings should follows:



plan layouts scale of @ least 1:100.
plant areas scale of @ least 1:50 , accompanied cross-sections.
the drawing don t indicate precise positions of services, should feasible install services within general routes indicated. should possible produce co-ordination drawings or installation drawings without major re-routing of services.
represent pipework single line layouts.
represent ductwork either double or single line layouts required ensure routes indicated feasible.
indicate on drawing space available major service routing in both horizontal , vertical planes.

installation drawing

a drawing based on detailed drawing, installation drawing or co-ordination drawing (interface drawing) primary purpose of defining information needed tradesmen on site install works or concurrently work among various engineering assembly. main features of typical installation drawings are:



plan layouts scale of @ least 1:50, accompanied cross-sections scale of @ least 1:20 congested areas
a spatially coordinated drawing, i.e., show no physical location clashes between system components
allowance inclusion of supports , fixtures necessary install works
allowance service @ widest point spaces between pipe , duct runs, insulation, standard fitting dimensions, , joint widths
installation details provided shop drawings
installation working space; space facilitate commissioning , space allow on-going operation , maintenance in accordance relevant health , safety requirements
plant , equipment including alternatives , options
dimensions services positioning important enough not installers
plant room layouts scale of @ least 1:20, accompanied cross-sections , elevations scale of @ least 1:20

record (as installed, as-built) drawing

a drawing showing building , services installations installed @ date of practical completion. record drawing development of installation drawing. main features of record drawings should follows.



provide record of locations of systems , components installed including pumps, fans, valves, strainers, terminals, electrical switchgear, distribution , components.
use scale not less of installation drawings.
have marked on drawings positions of access points operating , maintenance purposes.
the drawings should not dimensioned unless inclusion of dimension considered necessary location.

builder s work drawing
design stage

these drawings show provisions required accommodate services affect design of building structure, fabric, , external works. includes drawings (and schedules) of work building trade carries out, or must cost-estimated @ design stage, e.g., plant bases


installation stage

these drawings show requirements building works necessary facilitate installing engineering services (other appropriate mark out on site). information on these drawing includes details of all:



bases plant formed in concrete, brickwork or blockwork, scale of not less 1:20
attendant builders work, holes, chases, etc. conduits, cables , trunking etc. , item access function of installation required scale of not less 1:100
purpose made brackets supporting service or plant/equipment scale of not less 1:50
accesses ceilings, ducts, etc. @ scale of not less 1:50
special fixings, inserts, brackets, anchors, suspensions, supports etc. @ scale of not less 1:20
sleeves, puddle flanges, access chambers @ scale not less 1:20




^ mechanical drawing , roymech 5 february 2011. retrieved on 2011-01-28.






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