Surfacing
Welds
Buildup
Buttering
Cladding
Hardfacing
Completed
Welds
(Groove Welds)
Weld face
Face reinforcement
Root reinforcement
Weld toe
Weld root
Backing weld
Back weld
Completed
Welds
(Fillet Welds)
Leg
Weld root
Weld face
Weld toe
COMPLETED WELDS
(BS EN ISO 15607)
Penetration
and Weld
Size
Weld Size
Terminology
(Fillet Welds)
Convex
Concave
Size of Welds (BS-499)
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type of Preparation Remarks
Joint Weld(s)
Butt Butt Close Square Full
Penetration
Butt Butt Close Square Full
Penetration
Butt Butt Raised Edges
Butt Butt Close Square Partial
Penetration
Butt Butt Open Square Full
with Backing Penetration
Bar
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type of Preparation Remarks
Joint Weld(s)
Butt Butt Close Square Full Penetration,
welded from both
sides
Butt Butt Single V with Full Penetration
root faces
Butt Butt Single V with Full Penetration
backing strip
Butt Butt Single V with Full Penetration,
root faces sealing run used
Butt Butt Double V with Full Penetration,
root faces welded from both
sides
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type of Preparation Remarks
Joint Weld(s)
Butt Butt Double V with Partial Penetration,
broad root welded from both
faces sides
Butt Butt and Single V with Partial Penetration
fillet broad root welded from both
faces sides
Butt Butt Double V with Partial Penetration,
broad root welded from both
faces sides
Butt Butt Close square Welded from both
sides
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type of Preparation Remarks
Joint Weld(s)
Butt Butt Single bevel Full Penetration
with root
faces
Butt Butt Single V with Full Penetration,
root faces, sealing run used
Thicker plate
tapered
Butt Compound Single bevel Full Penetration,
of butt with root sealing run used
and fillet faces
Butt Butt Single V with Full Penetration,
root faces welded from both sides
T Butt Single bevel Full Penetration
with root
faces
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type of Preparation Remarks
Joint Weld(s)
T Fillet Close square Welded from both
sides
T Butt Double Full Penetration
bevel welded from both
sides
T Compound Double Full Penetration,
of butt bevel welded from both
and fillets sides
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type Preparation Remarks
Joint of
Weld(s)
T Butt Double bevel Partial Penetration,
with wide or welded from both
deep root sides
faces
T Butt Single bevel Full Penetration
T Fillet Edge
prepared as
necessary
Cruciform Butt Double bevel Welded from both
sides
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type Preparation Remarks
Joint of
Weld(s)
Cruciform Fillet Close square Welded from both
sides
Lap Fillet Square edge
Lap Plug Hole(s) of any
shape in one
plate
Lap Fillet Hole(s) of any Welded all round
shape in one
plate
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type Preparation Remarks
Joint of
Weld(s)
Lap Fusion None
Spot
Corner Butt Single bevel Full penetration
with root face
Corner Fillet Edges
prepared as
necessary
Corner Fillets Square edge Welded from both
sides
SKCTCHES OF TYPES OF JOINTS, WELDS AND
WELD PREPARATION (BS – 499)
Sketch Type of Type Preparation Remarks
Joint of
Weld(s)
Corner Fillets Square edge Partially lapped
corner, welded from
both sides
Edge Edge Square edge Edges fully covered
Welding Symbol
(AWS A2.4)
Standard Symbols for Welding, Brazing,
and Nondestructive Examination)
(BS EN 22553 ISO 2553)
Welded,Brazed and Soldered Joints –
Symbolic Representation on Drawings
Standard
Location of
Elements of
a Welding
Symbol
Welding
Symbol
Elements
Reference
Line
