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BUTTWELD [3]
Specifications
Welding end Preparation Selection
Buttweld STD ASTM A234 ANSI B16.9 Welding End Preparation to ANSI B16.25
WALL THICKNESS
WELDING AND PREPARATION
LESS THAN T (*)
CUT SQUARE OR SLIGHTLY CHAMFERED AT MANUFACTURER’S OPTION.
T (*) TO 22 INCLUDED
PLAIN BEVEL AS SKETCH (A)
MORE THAN 22
COMPOUND BEVEL AS SKETCH (B)
NOTE :- ( * )
T = 5MM FOR CARBON, FERRITIC ALLOY STEEL OR WROUGHT IRON;
T = 4MM FOR AUSTENITIC ALLOY STEEL
1.60 ±0.8
37.5°±2.5°
T=22
30° Max
1.60 ±0.8
3
1 Max
37.5°±2.5°
10°±1°
30° Max
T=22
19
3
1 Max
Sketch A
1.60 ±0.8
37.5°±2.5°
T=22
30° Max
1.60 ±0.8
3
1 Max
37.5°±2.5°
10°±1°
30° Max
T=22
19
3
1 Max
Sketch B
Dimensional Tolerance
Buttweld SGP JIS B 2311 Dimensional Tolerance
ALL FITTINGS
90º & 45º
ELBOWS
TEES
REDUCERS
NOMINAL
PIPE SIZE
(NPS)
OUTSIDE
DIAMETER AT
BEVEL
INSIDE
DIAMETER AT
END
WALL
THICKNESS
CENTRE TO
END
CENTRE TO
END
OVERALL
LENGTH
OUTSIDE DIAM-
ETER AT BEVEL
+2.0MM
-2.0MM
+2.0MM
-2.0MM
+NOT SPECIFIED
-15.00%
+2.0MM
-2.0MM
+2.0MM
-2.0MM
+2.0MM
-2.0MM
3” - 4”
+2.5MM
-2.5MM
+2.5MM
-2.5MM
5” - 8”
+3.5MM
-3.5MM
+3.5MM
-3.5MM
+3.5MM
-3.5MM
+3.2MM
-3.2MM
+3.2MM
-3.2MM
