Weld Throat Thickness
This article provides notes on welding gauge.
- Throat thickness welded, No approval range t t 30mm t 5mm 3 Thickness Throat Thickness Test Piece Thickness (t) Fillet welds Qualified by butt welds:- The throat thickness approval range is based on the deposit thickness and the plate.
- Theoretical Throat = 0.7 x Size. Unequal Leg Fillet Weld For unequal leg fillet welds, the “size” of the weld is the leg length of the largest right triangle which can be inscribed within the fillet weld cross section. Slip-on and Socket Welded Flanges. = 1.4 T1 or thickness of the Hub, whichever is smaller, but not less than 1/8 in.
Where fuw is the weld metal strength, a is the weld throat thickness and L is the weld length. The term 0.6 fuw represents the design shear stress of the weld metal where the value of fuw is the nominal tensile strength of weld metal given in Table 7.3. Weld design Throat area of fillet weld A mm 2, in 2 for full weld length for load-bearing (active). Flange thickness mm, in Parent topic: Welding Joints.
After welding the welds are inspected for size and shape by means of welding gauges. These are metal plates or high gauge-sheets with cuts corresponding to the cross-section of a given size and type of weld.
Another gauge, simple in design, is shown in Fig. to measure the throat thickness of a fillet weld. The throat thickness readings are shown on the curving line of the gauge. The gauge is held as shown in the figure until a point of curve in the gauges touches the centre of the face of the weld and the curve of the gauge also rests against two sides making the Tee-joint.
Fillet Weld Size Calculation
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At B, throat thickness of the fillet weld is 5-6 mm which is a point on the gauge touching the centre of the face of the weld.
Weld Throat Thickness Fillet Weld Chart
On each gauge numerals are punched indicating the thickness of the work in millimeters for butt welds, and the leg in millimeters for fillet welds. As such, it is difficult to keep the size of a weld within accurate limits—each gauge has cuts for the maximum and minimum size of a given weld. A set of gauges for the most commonly used weld sizes (6-14 mm) is clamped by a ring or a bolt (Fig. ).
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Types of Welding gauges :
Fillet Weld Throat Thickness
- Welding Inspection Ruler WG 01
- Universal welding gauge WG 2
- Welding gauge WG3
- Digital welding gage WG3 Digital
- HI-LO Welding Gage (WG4)
- Economy Single Purpose Hi-Lo Welding Gage
- Welding gage WG5
- Automatic Weld Size Weld Gauge WG7
- Bridge Cam Gage
- Adjustable Fillet Weld Gage WG8
- Pipe Pit Gage WG10
- Skew-T Fillet Weld Gauge WG12
- “V-WAC” Single Weld Gage
- Pocket Bridge Cam Gauge
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