Explosion resistant blanket for flow line

Details Explosion resistant blanket for flow line Explosion resistant blanket for flow line

2000-04-27

2001-10-09

Brinson, Patrick (Department: 3752)

Pipes and tubular conduits

Repairing

Patches

C138S110000, C138S149000

Reexamination Certificate

active

06298882

ABSTRACT:

TECHNICAL FIELD
This invention relates in general to safety equipment for high pressure flow lines, and in particular to an explosion resistant blanket wrap for covering individual components or union connections in a high pressure flow line.
BACKGROUND OF THE INVENTION
In high pressure flow lines and related components, an explosion or rupture of the line can propel metal shards or broken components outward at such a speed as to make the flying debris dangerous to nearby workers. In many cases the workers must work in close proximity to the high pressure lines and it is impossible to maintain a safe distance. Thus, the pipeline owner should take precautions to protect the workers.
One way to protect workers from the debris of an explosion or rupture of a flow line is to wrap the line and component in a protective blanket. These blankets are usually high strength material held on by clamps or the like. The high strength materials suitable for this application tend to deteriorate when subjected to moisture and the ultraviolet spectrum of sunlight. However, since the protected flow lines are commonly outside, moisture and ultraviolet light are prevalent and the blankets deteriorate quickly. Further the clamps which hold the blankets to the flow lines are usually metal, which over time can rust and make it difficult to remove the clamps to replace the blanket.
Therefore, there is a need for a safety blanket that is water and ultraviolet light resistant. Further that blanket should include provisions for attachment to the pipeline component that are weather resistant.
SUMMARY OF THE INVENTION
The present invention is drawn to a device to contain an explosion or rupture at a component of a pipeline. The device has a flexible blanket sized to wrap closely around the component. The blanket has a plurality of flexible internal layers constructed of a high tensile strength material and a flexible cover layer on an outer surface of the blanket constructed of a water resistant material. A plurality of elongate straps are joined to the blanket and adapted to wrap around the blanket and the component and secure the blanket to the component.
The cover layer is resistant to degradation from ultraviolet light. The cover layer is constructed from vinyl or nylon. The straps are secured with metal floating bar buckle fastener. The internal layers are constructed of a para-aramid fibre. The device further comprises an inner cover layer on an inside surface of the blanket. The inner cover layer encapsulates the internal layers between the covers, and is constructed of a water resistant material. The straps are retained to the blanket by stitching that extends through all of the layers. The device further includes a pair of clamps removably coupled to the pipeline adjacent the component. A cable is attached to the clamps to retain the clamps in relation upon separation of the pipeline between the clamps.


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