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Abbreviations for Piping Drawings

Piping-Drawings

General

S.No Abbreviation Description
1 BOP Bottom of Pipe
2 CL Center Line
3 EL Elevation
4 GR Grade
5 HC Hose Connection
6 ID Inside Diameter
7 MAT’L Materials
8 MTO Materials Take Off
9 REV Revision
10 OD Outside Diameter
11 SPEC Specification
12 STD Standard
13 BW Butt Weld
14 CONC Concentric
15 ECC Eccentric
16 ELL Elbow
17 FLG Flange
18 LR Long Radius
19 NPS Nominate Pipe Size
20 MFD Mechanical Flow Diagram
21 P&ID Piping and Instrumentation Diagram
22 PFD Process Flow Diagram
23 PSIG Pounds per Square Inch Gage
24 NPT National Pipe Threads Tapered
25 PVC Poly Vinyl Chloride
26 SMLS Seamless Pipe
27 SO Slip On
28 SW Socket Weld
29 WN Welding Neck (kind of flange)
30 XS Extra Strong (wall thickness of pipe)
31 XXS Double Extra Strong (wall thickness of pipe)

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