The Ultimate Glossary of Sanitary Fitting Nomenclature

•  Initial Letter B: BioProcessing Equip STD
•  Number Type: Ell, Tee, Adapter, etc.
•  End Type: W=weld, M=ferrule, mp
•  Size: in inches or 100s of inch (1/2” = 50)
•  Material: 304, 316, AL6XN

Fitting Number Designation

Adapters

•  Clamp/End                   Number 17
•  M NPT/W                      Number 19
•  F NPT/TC                      Number 22
•  M NPT/TC                     Number 21 
•  Thermowell                  Number 23

Reducers

•  Concentric:                   Number 31
•  Ecentric:                        Number 32
•  Flanges:                         Number 38

Elbows:                                      Number 2

•  C is a 90 degree bend
•  K is a 45 degree bend

Tees:                                            Number 7

Crosses:                                      Number 9

Clamps:                                      Number 13

Ferrules:

•   Male:                             Number 14
•  Female:                          Number 15

End Caps:                                  Number 16

End Type Designation

B                             After number=Bevel Seat
W                            Weld
M                            Ferrule
MP                          All Ends Ferrule
R                             Reducing (Tee, Ferrule, Lateral)
V                             Schedule 5
X                             Schedule 10
NPT                        National Pipe Thread

Tee:                         Left, Right, Top (i.e. WMM)
Cross:                     Left, Right, Top, Bottom (i.e. MMWT)
Lateral:                   Left, Right, Lateral (i.e. WWM)
Y:                             Bottom, Branch, Branch (i.e. MTP)

Ferrule Designations

Clamp Systems
M/S/Clamp:              Tri-Clamp
I/Z/EYE:                    I Line (Flat Loose Gasket) Wide Clamp
HI:                             Thin I Line (Uses I Line Gasket) (Tri-Clamp Clamp)
Q:                              Q Line (Tri-Clamp Clone Thicker Ferrules)

Threaded Systems
B/BS:                        Bevel Seat (Gasket Loose)
JP:                             John Perry (Gasket Fits Over Male End)
APC/APV/K:            APV Fitting (Gasket Fits Into Threaded Nut)
DC:                           Similar to APC (Gasket Lower Profile)

Download other fitting resources: Fitting Part Number Cross Reference and Alfa Laval Fittings Poster