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13 Cards in this Set
- Front
- Back
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What are the two most common ways to accommodate thermal movement ? |
A) offsets and expansion loops or bends B) mechanical expansion joints (bellows and slip type expansion joints) |
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What are the four common ways of non mechanical methods for expansion? |
A) pipe loops B) offsets C) expansion coil D) changes of direction |
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What are the two types of pipe installations ? |
A) free floating B) restrained (has anchors, guides and expansion joints) |
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Each change of direction in a pipeline offers what? |
Piping flexibility, which allows for some expansion without causing deflection |
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Pipe loops and offsets are an ideal way to allow expansion; however you should be cautious when line connects too: |
Boilers, header branches and wall Finns, as these aren't designed to cope with pipe expansion stress |
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What must be considered when using slip joint expansion devices ? |
The slip joint must be installed in an accessible location so they can be serviced |
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What is the most common rule to use when designing a non problematic heating pipeline? |
Keep the piping design as simple as possible. In general the simpler the design the more economical the result. |
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As a rule where should the pipe guides be placed in reference to the expansion joints ? |
The first pipe guide should be placed 4 pipe diameters from the expansion joint and the second 14 pipe diameters from it |
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What is the most trouble free expansion joint? |
The non mechanical expansion loop or offset is the most trouble free. However on some installations this device may be restricted due to space limitations |
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Describe axial movement |
Travel through the centreline of the expansion device. All mechanical expansion joints are designed for axial movement and some will tolerate deflection. |
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Describe lateral offset |
When the expansion joint acts as an offset device, with the faces of the offset square to each other |
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Describe angular rotation |
It's when the expansion joint acts as an offset fitting. The fitting won't have its faces square to each other but one end will have turned or deflected. |
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What device is better to use when a considerable amount of joint lateral movement is needed? |
A flexible connector |
