Piping components and mechanical parts
Free DWG libraries for Piping components and mechanical parts. Narrow by standard or type on the left, or search every symbol by name.
Symbol names are in English. Search by name (“gate valve”), by designation (“IPE 200”, “DN100”, “M8”) or by block name (“PID_VALVE_GATE”).
6 libraries
ISO 10628-2 · 296 symbols · Schematic symbols
P&ID equipment and piping (ISO 10628-2 style)
Vessels, columns, heat exchangers, pumps, compressors, filters, conveyors, valves, fittings and piping symbols, with tag, capacity and design data as attributes.
View library →
ASME B16.9 · 259 symbols · Parts and dimensions
ASME B16.9 butt-weld fittings
Elbows, equal tees, end caps and concentric and eccentric reducers, NPS 1/2 to 24, outlines at real size in millimetres, with material and schedule as attributes.
View library →
229 symbols · Schematic symbols
Plumbing and fire protection symbols
Pipe fittings, valves, drains, manholes, water heaters, sprinklers, fire valves, hydrants, extinguishers, detectors and alarm devices as AutoCAD blocks with schedule attributes.
View library →
ASME B16.5 · 179 symbols · Parts and dimensions
ASME B16.5 pipe flanges
Weld neck, slip-on and blind flanges, Class 150, 300 and 600, NPS 1/2 to 24, side and face view at real size in inches, with class and material as attributes.
View library →
ISO metric · 80 symbols · Parts and dimensions
ISO metric fasteners
Hex head bolts, socket head cap screws, hex nuts and plain washers, M3 to M24, side and end view at real size, with size and part data as attributes.
View library →
EN 1092-1 · 68 symbols · Parts and dimensions
EN 1092-1 weld neck flanges
Type 11 weld neck flanges, PN10, PN16, PN25 and PN40, DN10 to DN600, side and face view at real size in millimetres, with pressure rating and bore as attributes.
View library →
Browse the libraries
By purpose
By industry
By standard
- ISO: ISO 10628-2, ISO metric, ISO 1219-1, ISO 1101, ISO 14084-2, ISO 14617
- IEC: Electrical symbols (IEC 60617 style), IEC 61131-3, Power system single-line symbols
- ISA: ISA 5.1, ISA 5.5, ISA 5.3
- IEEE / ANSI: ANSI/IEEE 315
- ASME: ASME B16.5, ASME B16.9
- EN / DIN: EN 10365, EN 10210-2, EN 1092-1
- AISC: AISC wide-flange and I-beam shapes, AISC channels and angles, AISC HSS and steel pipe
- Industry practice: Architectural plan symbols, HVAC symbols, Drawing annotation symbols, Home furniture, Landscape plan symbols, Plumbing and fire protection symbols, Entourage symbols, Drawing marks, site, services and accessibility symbols, Stairs, walls, roofs and structure symbols, Furniture plan symbols, Bathroom and kitchen symbols, Door and window symbols, Building electrical plan symbols, Metallurgy and rolling mill symbols, Water and wastewater treatment symbols, Process equipment symbols
Questions about the symbol libraries
- Are the DWG symbol libraries free?
- Yes. Every library on this page is a free download: one ZIP per DWG file, with a preview of every symbol before you download.
- How do I find a symbol quickly?
- Type its name ("gate valve"), a designation ("IPE 200", "DN100", "M8") or a block name into the search box. The filters on the left narrow the libraries by industry, purpose, standard and type, and the search works inside whatever the filters leave. Symbol names are in English.
- Which standards do the libraries follow?
- ISO, IEC, ISA, IEEE / ANSI, ASME, EN / DIN and AISC are covered, for example IEC 60617, ISA 5.1, ISO 10628-2, ISO 1219-1, ISO 1101 and ISO 14617. Where no standard exists (architecture, HVAC, process equipment, water treatment, metallurgy) the libraries follow common practice of the trade and say so on their page.
- Are the symbols certified copies of the standards?
- No. The symbols are our own drawings after the common forms of those standards, not copies of the standards and not certified for conformance. Check the shapes against your own copy of the standard when a client requires strict compliance.
- What is in a block besides the drawing?
- Every block carries attributes: a visible tag and, hidden, the data a schedule or equipment list needs, such as service, size, rating, manufacturer and model. Plan symbols are drawn at real size in millimetres; schematic symbols at their plotted size.
- What if the symbol I need is missing?
- Tell us which symbol and which standard or trade it comes from on the support page. Requests from searches that find nothing decide what is drawn next.