A
Al: Aluminum
Al.B: Aluminium bronze
ALBC: Aluminium bronze casting
Asb.: Asbestos
AAE: Acrylic acid – ethylene
AIV air inlet valve
B
BV: Ball Valve
BFV: Butterfly Valve
BRS: brass
BRZ: bronze
BW: Butt Welding
BS: British Standard
C
CV: Check Valve
CI: Cast Iron
CL: COMM. Class
CODE: Commodity Code
CS: Carbon Steel
CLAS: Cast low alloy steel
D
DN: Nominal Diameter
DI: Ductile iron
DV: Diaphragm Valve
DSS: Duplex Stainless Steel
E
ECC: Eccentric
ENR: En gi neering Sta ndard
EPDM: Ethyle ne-Propyle ne-Die ne Mo nomer
Ext-Bonnet: Extended Bonnet(Stem)
F
FF: Flat Face
FLGD: Flange
FNPT 60: Female NPT Threads60 oNPT
FB: Full Bore/Port
FT: Full Threaded Stud Bolt
FG: Flexible Graphite
FLB: Floating Ball Valve
FS: Fire Safe
G
GSK: Gasket
GLV: Globe Valve
GO: Gear Operation
GR: Grade
GV: Gate Valve
H
HAS-C: Hastelloy-C
HHN: Heavy Hexagonal Nut
HPS: High-Pressure Service
HYN: side Diameter
HCV: Hydraulic control valve
I
ID: Inside Diameter
ISO: International Orga ni zati on For Stan dardizati on
L
LG: Large Groove
LT: Large Tongue
LM: Large Male
LFM: large female
L.T.C: Low-Temperature Carbon Steel
LTS: Low-Temperature Service
M
MFR: Manufacturer Standard
MEG: Metallic Envelope Gasket
MI: Malleable iron
N
NBR: Nitrile-Butadiene Rubber
No: Number
NPS: Nominal Pipe Size
NPT: National Taper Pipe (Thread)NR Natural Rubber
OD: Outside Diameter
P
PLSO: Plate Slip-On
PP: Polyethylene
PPL: Polyphenyl
PTFE: Polytetrafluoroethyle ne
PVC: Polyvi nyl Chloride
PKG: Packing
R
R: Radius
R2 55 •: Taper Pipe External Thread55°
Rc 55 0: Taper Pipe Internal Thread55 °
RCPL: Reducing Coupling
RED: Reduced
RB: Reduced Bore/Port
RF: Raised Face
RJ: Ring Joint
RFG: Reinforced Flexible Graphite
RJ (RTJ): Ring Joint (Ring Trough Joint)
RJG: Metallic Ring Joint Gasket
RT: Radiographic Test
RPTFE: Reinforced Polytetrafluoroethylene
RV: Relief Valve
S
SE: Side Entry
SF: Small Female Face
SFR: Synthetic Fiber Rubber
SG: Small Groove
SM: Small Male Face
SMLS: Seamless
SNIP: Swage Nipple
SO: Slip-On
SW: Socket Welding
SPS: Spiral Seam
SR: Short Radius
SRT: T-Type Strainer
SRY: Y-Type Strainer
ST: Small Tongue
STD: Standard
STHU: Straight-Through
STL: Stellite
S.S: Stainless Steel
S.W: spiral wound gasket
T
TE: Threaded End
TE: Top Entry
TEMP: Temperature
TEY: Top Entry
THK: Thickness
THR: Thread
TLD: Tilting Disc
TOE: Thread One End
TRI-ECC: Thr-Ecce nitric
TRUB: Trunnion Ball Valve
TZM: Titanium-zirconium-molybdenum alloy
U
UG: Underground
UT: Ultrasonic Test
USV: underwater safety valve
V
Val.: valve
VB: valve body
W
WAF: Wafer
WB: Welding Bonnet
WN: Welding Neck
