Butt Fusion Set-Up Parameters Quiz

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Questions and Answers

What is the recommended step after cleaning a pipe with isopropyl alcohol?

Apply heat to speed up the drying process

Apply a protective coating

Rinse with water and dry with lint-free cotton cloths (correct)

Leave it to air dry

What is the minimum heating tool surface temperature required for butt fusion set-up parameters?

410°F

380°F

390°F

400°F (correct)

How should one prepare the inside and outside of the component (pipe or fitting) ends before fusion?

Rub with oil

Scrub with a wire brush

Spray with water

Wipe with a clean, dry, lint-free cloth (correct)

What may be necessary during a fusion operation in adverse weather conditions?

A temporary shelter over the fusion equipment Signup and view all the answers

What is the purpose of facing the component ends during the butt fusion procedure?

To establish smooth, clean, parallel mating surfaces Signup and view all the answers

What should be done if high-low alignment is not achieved when bringing the ends together in butt fusion?

Adjust alignment as necessary by tightening the high side down Signup and view all the answers

Before making connections, what should be ensured about the pipes?

Correctly aligned Signup and view all the answers

Why is it recommended to 'S' the pipes on each side of the machine when working with coiled pipe?

To make it easier to join due to coil curvature Signup and view all the answers

What technique can be used to relieve tension when joining coiled pipe?

Making an s-curve between pipe coils Signup and view all the answers

What should be done if facing stops are present on the fusion machine?

Face until there is a minimal distance between fixed and moveable clamps Signup and view all the answers

What is recommended for pulled-in pipes to recover from tensile stresses?

Allow them to relax for several hours Signup and view all the answers

Why should the component ends protrude past the clamps during butt fusion set-up?

So that facing will be complete Signup and view all the answers

"Do not bend pipe into alignment against open butt fusion clamps" is a warning related to:

"Impact Hazard" Signup and view all the answers

What should be done if foreign matter is present on the component ends before fusion?

Wipe clean with a non-synthetic cloth Signup and view all the answers

What should be done if the high-low misalignment between pipe ends is more than 10% of the pipe minimum wall thickness?

Re-face if high-low alignment is adjusted. Signup and view all the answers

What is the recommended cooling time rate against the pipe ends for maintaining fusion pressure?

11 minutes per inch of pipe wall thickness. Signup and view all the answers

What is the purpose of applying enough joining force to roll both melt beads over to the pipe surface during fusion?

To ensure proper fusion between the components. Signup and view all the answers

Why should you avoid pulling, pressure testing, and rough handling immediately after removing the pipe from the fusion machine?

To allow time for better cooling of the joint. Signup and view all the answers

What should be done with damaged products found during inspection before fusion?

Remove surface damage that could compromise joining surfaces. Signup and view all the answers

Why is it important for pipe and fitting surfaces to be clean and dry before fusion?

To facilitate better fusion and avoid contamination. Signup and view all the answers

What could be indicated if the melt bead curls significantly away from the heating tool surface during heating?

Unacceptable pressure during heating. Signup and view all the answers

When should alcohol be used to clean extremely dirty pipe before facing?

Before installing the pipe in the fusion machine. Signup and view all the answers

Study Notes

Pre-Fusion Preparation

Remove facing tool and clear shavings and pipe chips from component ends
Avoid touching component ends with hands after facing

Alignment

Bring component ends together, check alignment and slippage against fusion pressure
Ensure complete contact all around both ends with no detectable gaps and outside diameters in high-low alignment
Maximum high-low misalignment should be less than 10% of pipe minimum wall thickness

Melt

Verify heating tool maintains correct temperature (min. 400°F, max. 450°F)
Place heating tool between component ends and move ends against it with moderate pressure
Hold ends against heating tool without force to form melt beads
Minimum melt bead size depends on pipe OD (refer to Table 1)
Complete process within recommended time in Table 2

Join

Inspect melted ends, which should be flat, smooth, and completely melted
Bring ends together and apply correct joining force (do not slam)
Roll melt beads over to pipe surface (concave melt surface is unacceptable)

Hold

Hold joining force against ends until joint is cool
Maintain fusion pressure against pipe ends at a minimum cool time rate of 11 minutes per inch of pipe wall thickness
Avoid pulling, installation, pressure testing, and rough handling for at least 30 minutes after removal from fusion machine

Post-Fusion Inspection

Inspect both sides of joint for uniformly rounded and consistent melt beads
Check pipe lengths and fittings for unacceptable cuts, gouges, deep scratches, or other defects
Remove surface damage at pipe ends that could compromise joining surfaces or interfere with fusion tools or equipment

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Description

This quiz covers the set-up parameters for butt fusion, including the heating tool surface temperature requirements. It includes information on ensuring cleanliness and proper temperature of the heating tool surfaces before beginning the fusion procedure.