How long should your tacks be on the B-Pressure test?

How long should your tacks be on the B-Pressure test?

• A. 1/2 inch
• B. 3/4 inch
• C. 1 inch
• D. 1 1/4 inch

Answer: (B)

In the B-Pressure test, your tack welds are there to hold the pieces in proper alignment without adding excessive heat into the joint. A tack about three-quarters of an inch long hits that balance: long enough to secure the fit, but short enough to minimize heat input and distortion when you finish with the full weld. If tacks are too short, they may not hold; if they’re too long, they add unnecessary heat and can warp the work or require more cleanup. So the recommended length is 3/4 inch.

In the B-Pressure test, your tack welds are there to hold the pieces in proper alignment without adding excessive heat into the joint. A tack about three-quarters of an inch long hits that balance: long enough to secure the fit, but short enough to minimize heat input and distortion when you finish with the full weld. If tacks are too short, they may not hold; if they’re too long, they add unnecessary heat and can warp the work or require more cleanup. So the recommended length is 3/4 inch.