초록 ▼

Segments of a coupling for use in a high-pressure piping system are provided with cast multiple keys in their as cast condition, and which are for reception within corresponding plural or multiple grooves in pipe ends, crushing of the operative faces of the keys and cold working of the faces of the

Segments of a coupling for use in a high-pressure piping system are provided with cast multiple keys in their as cast condition, and which are for reception within corresponding plural or multiple grooves in pipe ends, crushing of the operative faces of the keys and cold working of the faces of the pipe grooves in engagement therewith providing for equalization of the axial loading imposed on the respective keys.

대표청구항 ▼

A coupling segment specifically for use in a piping system of high-pressure relative to the pipe strength in conjunction with at least one additional coupling segment comprising: a substantially unfinished high strength metal casting of iron having substantial ductility and providing an arcuate memb

A coupling segment specifically for use in a piping system of high-pressure relative to the pipe strength in conjunction with at least one additional coupling segment comprising: a substantially unfinished high strength metal casting of iron having substantial ductility and providing an arcuate member having an internal recess for the reception of a gasket; a pad at each circumferential end of said arcuate member and cast integrally with said arcuate member, each said pad being adapted to receive securing means for securing said pad to the pad of an adjacent arcuate member with said arcuate members encircling a pipe; at least one portion of said arcuate member extending axially to one side of said internal recess; and, plural axially spaced continuous arcuate keys integral with and extending inwardly of the inner periphery of said axially extending portion, said keys respectively being for engagement within correspondingly axially spaced grooves in the periphery of said pipe for resisting relative axial movement between said coupling segment and said pipe under axial loading, each said key having an unfinished engagement face having an inversely pebbled surface produced in the casting thereof and which faces towards said internal recess, said engagement faces at all positions along the circumferential extent of said keys being substantially radial and perpendicular to the axis of generation of said arcuate member, said inversely pebbled surface of each said key being capable of crushing down and cold working the material of said pipe to provide equalization of the stresses imposed on said keys when under axial loading.