| CPC F16L 9/006 (2013.01) [C08L 33/02 (2013.01); C08L 33/10 (2013.01); F16L 29/002 (2013.01); F16L 41/02 (2013.01); F16L 53/30 (2018.01); F16L 2201/40 (2013.01)] | 11 Claims |

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1. An easily polymerizable substance handling device comprising:
a pipeline through which an easily polymerizable substance containing material can flow;
a tubular member provided as a protrusion from the pipeline and communicating with inside of the pipeline through an opening part formed at the pipeline; and
a fixed cover part dividing inside of the pipeline from the tubular member,
wherein the cover part has a curved surface on a side closer to inside of the pipeline and is disposed to block at least part of the opening part and have a gap with respect to a peripheral part of the opening part that extends from the opening part along the tubular member.
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