Podcast
Questions and Answers
What is the recommended step after cleaning a pipe with isopropyl alcohol?
What is the recommended step after cleaning a pipe with isopropyl alcohol?
What is the minimum heating tool surface temperature required for butt fusion set-up parameters?
What is the minimum heating tool surface temperature required for butt fusion set-up parameters?
How should one prepare the inside and outside of the component (pipe or fitting) ends before fusion?
How should one prepare the inside and outside of the component (pipe or fitting) ends before fusion?
What may be necessary during a fusion operation in adverse weather conditions?
What may be necessary during a fusion operation in adverse weather conditions?
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What is the purpose of facing the component ends during the butt fusion procedure?
What is the purpose of facing the component ends during the butt fusion procedure?
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What should be done if high-low alignment is not achieved when bringing the ends together in butt fusion?
What should be done if high-low alignment is not achieved when bringing the ends together in butt fusion?
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Before making connections, what should be ensured about the pipes?
Before making connections, what should be ensured about the pipes?
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Why is it recommended to 'S' the pipes on each side of the machine when working with coiled pipe?
Why is it recommended to 'S' the pipes on each side of the machine when working with coiled pipe?
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What technique can be used to relieve tension when joining coiled pipe?
What technique can be used to relieve tension when joining coiled pipe?
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What should be done if facing stops are present on the fusion machine?
What should be done if facing stops are present on the fusion machine?
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What is recommended for pulled-in pipes to recover from tensile stresses?
What is recommended for pulled-in pipes to recover from tensile stresses?
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Why should the component ends protrude past the clamps during butt fusion set-up?
Why should the component ends protrude past the clamps during butt fusion set-up?
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"Do not bend pipe into alignment against open butt fusion clamps" is a warning related to:
"Do not bend pipe into alignment against open butt fusion clamps" is a warning related to:
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What should be done if foreign matter is present on the component ends before fusion?
What should be done if foreign matter is present on the component ends before fusion?
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What should be done if the high-low misalignment between pipe ends is more than 10% of the pipe minimum wall thickness?
What should be done if the high-low misalignment between pipe ends is more than 10% of the pipe minimum wall thickness?
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What is the recommended cooling time rate against the pipe ends for maintaining fusion pressure?
What is the recommended cooling time rate against the pipe ends for maintaining fusion pressure?
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What is the purpose of applying enough joining force to roll both melt beads over to the pipe surface during fusion?
What is the purpose of applying enough joining force to roll both melt beads over to the pipe surface during fusion?
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Why should you avoid pulling, pressure testing, and rough handling immediately after removing the pipe from the fusion machine?
Why should you avoid pulling, pressure testing, and rough handling immediately after removing the pipe from the fusion machine?
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What should be done with damaged products found during inspection before fusion?
What should be done with damaged products found during inspection before fusion?
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Why is it important for pipe and fitting surfaces to be clean and dry before fusion?
Why is it important for pipe and fitting surfaces to be clean and dry before fusion?
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What could be indicated if the melt bead curls significantly away from the heating tool surface during heating?
What could be indicated if the melt bead curls significantly away from the heating tool surface during heating?
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When should alcohol be used to clean extremely dirty pipe before facing?
When should alcohol be used to clean extremely dirty pipe before facing?
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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.
