Acronymous in Fire Heater pipe design

[joskings]

Could someone explain what these letters means? SR RB

They appear in a drawing of a furnace coil where a, 5,563" OD sch 40 180º SR RB 254 CRS, bend is sketched.

Thanks for your help.

 

[JJPellin]

I believe that means Short Radius - Return Bend.

 

[JJPellin]

This is a list that I sometimes refer to for drawing abreviations.

ANSI American National Standards Institute
API American Petroleum Institute
ASME American Society of Mechanical Engineers
ASSY Assembly
ASTM American Society of Testing Materials
AVG Average
BB Bolted Bonnet
BC Bolt Circle
BF Blind Flange
BLDG Building
BM Bill of Material (Also BOM)
BOP Bottom of Pipe
BW Butt Weld
CI Cast Iron
CO Clean Out
CONC Concentric
COND Condensate
CPLG Coupling
CS Carbon Steel or Cast Steel
CSC Car Sealed Closed
CSO Car Sealed Open
oC Degrees Celsius
oF Degrees Fahrenheit
DIA Diameter
DWG Drawing
ECC Eccentric
ELEV Elevation
FF Full Face
FIG Figure
FLG Flange
FOB Flat on Bottom
FOT Flat on Top
FS Forged Steel
FT Feet or Foot
FW Field Weld
GALV Galvanized
GR Grade
HDR Header
ID Inside Diameter
INS Insulate
INV Invert (Inside Bottom of Pipe)
IPS Iron Pipe Size
I-ST Insulate and Steam Trace
LBS Pounds
LR Long Radius
M&F Male and Female
MFG Manufacturer
MI Malleable Iron
MIN Minimum
NC Normally Closed
NO Normally Open
OD Outside Diameter
PE Plain End
PSIA Pounds per Square Inch Absolute
PSIG Pounds per Square Inch Gauge
RB Return Bend
RED Reducer
RF Raised Face
RTJ Ring Type Joint (Also RJ)
SCH Schedule
SCRD Screwed
SMLS Seamless
SO Slip-On
SOL Sock-O-Let
SPEC Specification
SR Short Radius
SS Stainless Steel
STD Standard
STL Steel
STM Steam
SW Socket-Weld
SWG Swage
TE Threaded End
TEMP Temperature
TOC Top of Concrete
TOG Top of Grade
TOL Thread -O-Let
TOS Top of Steel
TYP Typical
VERT Vertical
W/ With
WE Weld End
WN Weld Neck
WOL Weld-O-Let
WT Weight
XH Extra Heavy (Also XS)
XXH Double Extra Heavy (Also XXS)