Abbreviations and Designations

Common formulations in dosing technology


Abbreviation Explanation Use
BSW British Standard Whitworth screw thread The screw thread most commonly used in England
BSP British Standard Pipe Pipe thread for connections not sealed in the thread
BSPT Tapered Whitworth pipe thread DIN 2999 Threaded pipes and fittings
NPT American pipe thread (tapered) Self-sealing connections
W 1“ BSW thread
1 inch = 25.4 mm
Pipe lines
G5/8 a External thread R5/8 Threaded pipes and fittings
G3/4 i Internal thread Rp3/4 Threaded pipes and fittings
M 10 Metric ISO thread M 10 Screws, fixings, general application
DN10 Nominal width 10 Pipe lines, valves
PN16 nominal pressure 16 Pipe lines, valves


Abbreviation Explanation Use
EPDM Ethylene Propylene Diene M-class rubber, elastomer Gaskets, O-rings, diaphragms
FPM or FKM Fluorine Polymer M-class rubber, elastomer, brand name: Viton Gaskets, O-rings, radial shaft seals, diaphragms
CSM Chlorosulfonated Polyethylene, elastomer Gaskets, shaped items
NBR Acrylonitrile Butadiene Rubber, elastomer O-rings, gaskets
Hastelloy Nickel-based alloy  
IXEF Polyarylamide, plastic  
Monel Nickel-copper alloy (about 65% Ni, 33% Cu, 2% Fe), very solid  
PE Polyethylene Chemical tank
PP Polypropylene, plastic Housing parts, pipes
PTFE Polytetrafluoroethylene, plastic, also called Teflon Housing parts, diaphragm, gaskets
PVC Polyvinyl chloride, plastic Housing parts, pipes
PVDF Polyvinylidene fluoride, plastic Housing parts, pipes
PMMA Polymethyl methacrylate, plexiglass Housing parts

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